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Add regression tests for recursive subquery planning

pull/1876/head
Onder Kalaci 2017-12-15 12:41:23 +02:00
parent 0d5a4b9c72
commit e2a5124830
51 changed files with 5733 additions and 158 deletions
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31
src/test/regress/expected/multi_complex_expressions.out
View File

@ -346,15 +346,28 @@ SELECT count(*) FROM lineitem, orders WHERE l_orderkey + 1 = o_orderkey;
ERROR: cannot perform local joins that involve expressions
DETAIL: local joins can be performed between columns only
-- Check that we can issue limit/offset queries
-- OFFSET in subqueries are not supported
-- Error in the planner when single repartition subquery
SELECT * FROM (SELECT o_custkey FROM orders GROUP BY o_custkey ORDER BY o_custkey OFFSET 20) sq;
ERROR: cannot perform distributed planning on this query
DETAIL: Subqueries with offset are not supported yet
-- Error in the optimizer when subquery pushdown is on
SELECT * FROM (SELECT o_orderkey FROM orders ORDER BY o_orderkey OFFSET 20) sq;
ERROR: cannot perform distributed planning on this query
DETAIL: Subqueries with offset are not supported yet
-- the subquery is recursively planned since it contains OFFSET, which is not pushdownable
SELECT * FROM (SELECT o_custkey FROM orders GROUP BY o_custkey ORDER BY o_custkey OFFSET 20) sq ORDER BY 1 LIMIT 5;
o_custkey
-----------
35
37
38
40
41
(5 rows)
-- the subquery is recursively planned since it contains OFFSET, which is not pushdownable
SELECT * FROM (SELECT o_orderkey FROM orders ORDER BY o_orderkey OFFSET 20) sq ORDER BY 1 LIMIT 5;
o_orderkey
------------
69
70
71
96
97
(5 rows)
-- Simple LIMIT/OFFSET with ORDER BY
SELECT o_orderkey FROM orders ORDER BY o_orderkey LIMIT 10 OFFSET 20;
o_orderkey

507
src/test/regress/expected/multi_complex_expressions_0.out Normal file
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@ -0,0 +1,507 @@
--
-- MULTI_COMPLEX_EXPRESSIONS
--
-- Check that we can correctly handle complex expressions and aggregates.
SELECT sum(l_quantity) / avg(l_quantity) FROM lineitem;
?column?
------------------------
12000.0000000000000000
(1 row)
SELECT sum(l_quantity) / (10 * avg(l_quantity)) FROM lineitem;
?column?
-----------------------
1200.0000000000000000
(1 row)
SELECT (sum(l_quantity) / (10 * avg(l_quantity))) + 11 FROM lineitem;
?column?
-----------------------
1211.0000000000000000
(1 row)
SELECT avg(l_quantity) as average FROM lineitem;
average
---------------------
25.4462500000000000
(1 row)
SELECT 100 * avg(l_quantity) as average_times_hundred FROM lineitem;
average_times_hundred
-----------------------
2544.6250000000000000
(1 row)
SELECT 100 * avg(l_quantity) / 10 as average_times_ten FROM lineitem;
average_times_ten
----------------------
254.4625000000000000
(1 row)
SELECT l_quantity, 10 * count(*) count_quantity FROM lineitem
GROUP BY l_quantity ORDER BY count_quantity, l_quantity;
l_quantity | count_quantity
------------+----------------
44.00 | 2150
38.00 | 2160
45.00 | 2180
13.00 | 2190
47.00 | 2200
29.00 | 2220
36.00 | 2230
49.00 | 2230
3.00 | 2270
35.00 | 2280
18.00 | 2290
31.00 | 2290
43.00 | 2290
14.00 | 2300
16.00 | 2300
17.00 | 2300
26.00 | 2300
7.00 | 2320
10.00 | 2340
34.00 | 2340
15.00 | 2350
25.00 | 2360
33.00 | 2360
42.00 | 2360
2.00 | 2370
12.00 | 2410
37.00 | 2410
6.00 | 2420
22.00 | 2420
1.00 | 2430
19.00 | 2430
4.00 | 2440
20.00 | 2460
48.00 | 2460
41.00 | 2470
24.00 | 2490
27.00 | 2490
8.00 | 2500
11.00 | 2500
5.00 | 2540
21.00 | 2550
32.00 | 2550
9.00 | 2580
39.00 | 2600
46.00 | 2600
50.00 | 2600
23.00 | 2610
30.00 | 2640
40.00 | 2690
28.00 | 2730
(50 rows)
-- Check that we can handle complex select clause expressions.
SELECT count(*) FROM lineitem
WHERE octet_length(l_comment || l_comment) > 40;
count
-------
8148
(1 row)
SELECT count(*) FROM lineitem
WHERE octet_length(concat(l_comment, l_comment)) > 40;
count
-------
8148
(1 row)
SELECT count(*) FROM lineitem
WHERE octet_length(l_comment) + octet_length('randomtext'::text) > 40;
count
-------
4611
(1 row)
SELECT count(*) FROM lineitem
WHERE octet_length(l_comment) + 10 > 40;
count
-------
4611
(1 row)
SELECT count(*) FROM lineitem
WHERE (l_receiptdate::timestamp - l_shipdate::timestamp) > interval '5 days';
count
-------
10008
(1 row)
-- can push down queries where no columns present on the WHERE clause
SELECT count(*) FROM lineitem WHERE random() = -0.1;
count
-------
0
(1 row)
-- boolean tests can be pushed down
SELECT count(*) FROM lineitem
WHERE (l_partkey > 10000) is true;
count
-------
11423
(1 row)
-- scalar array operator expressions can be pushed down
SELECT count(*) FROM lineitem
WHERE l_partkey = ANY(ARRAY[19353, 19354, 19355]);
count
-------
1
(1 row)
-- some more scalar array operator expressions
SELECT count(*) FROM lineitem
WHERE l_partkey = ALL(ARRAY[19353]);
count
-------
1
(1 row)
-- operator expressions involving arrays
SELECT count(*) FROM lineitem
WHERE ARRAY[19353, 19354, 19355] @> ARRAY[l_partkey];
count
-------
1
(1 row)
-- coerced via io expressions can be pushed down
SELECT count(*) FROM lineitem
WHERE (l_quantity/100)::int::bool::text::bool;
count
-------
260
(1 row)
-- case expressions can be pushed down
SELECT count(*) FROM lineitem
WHERE (CASE WHEN l_orderkey > 4000 THEN l_partkey / 100 > 1 ELSE false END);
count
-------
7948
(1 row)
-- coalesce expressions can be pushed down
SELECT count(*) FROM lineitem
WHERE COALESCE((l_partkey/50000)::bool, false);
count
-------
9122
(1 row)
-- nullif expressions can be pushed down
SELECT count(*) FROM lineitem
WHERE NULLIF((l_partkey/50000)::bool, false);
count
-------
9122
(1 row)
-- null test expressions can be pushed down
SELECT count(*) FROM orders
WHERE o_comment IS NOT null;
count
-------
2984
(1 row)
-- functions can be pushed down
SELECT count(*) FROM lineitem
WHERE isfinite(l_shipdate);
count
-------
12000
(1 row)
-- constant expressions can be pushed down
SELECT count(*) FROM lineitem
WHERE 0 != 0;
count
-------
0
(1 row)
-- distinct expressions can be pushed down
SELECT count(*) FROM lineitem
WHERE l_partkey IS DISTINCT FROM 50040;
count
-------
11999
(1 row)
-- row compare expression can be pushed down
SELECT count(*) FROM lineitem
WHERE row(l_partkey, 2, 3) > row(2000, 2, 3);
count
-------
11882
(1 row)
-- combination of different expressions can be pushed down
SELECT count(*) FROM lineitem
WHERE
(l_quantity/100)::int::bool::text::bool AND
CASE WHEN l_orderkey > 4000 THEN l_partkey / 100 > 1 ELSE false END AND
COALESCE((l_partkey/50000)::bool, false) AND
NULLIF((l_partkey/50000)::bool, false) AND
isfinite(l_shipdate) AND
l_partkey IS DISTINCT FROM 50040 AND
row(l_partkey, 2, 3) > row(2000, 2, 3);
count
-------
137
(1 row)
-- constant expression in the WHERE clause with a column in the target list
SELECT l_linenumber FROM lineitem
WHERE
1!=0
ORDER BY
l_linenumber
LIMIT 1;
l_linenumber
--------------
1
(1 row)
-- constant expression in the WHERE clause with expressions and a column the target list
SELECT count(*) * l_discount as total_discount, count(*), sum(l_tax), l_discount FROM lineitem
WHERE
1!=0
GROUP BY
l_discount
ORDER BY
total_discount DESC, sum(l_tax) DESC;
total_discount | count | sum | l_discount
----------------+-------+-------+------------
104.80 | 1048 | 41.08 | 0.10
98.55 | 1095 | 44.15 | 0.09
90.64 | 1133 | 45.94 | 0.08
71.05 | 1015 | 41.19 | 0.07
69.42 | 1157 | 45.75 | 0.06
53.60 | 1072 | 42.82 | 0.05
43.64 | 1091 | 44.40 | 0.04
32.55 | 1085 | 43.30 | 0.03
22.22 | 1111 | 45.07 | 0.02
11.22 | 1122 | 44.54 | 0.01
0.00 | 1071 | 44.00 | 0.00
(11 rows)
-- distinct expressions in the WHERE clause with a column in the target list
SELECT l_linenumber FROM lineitem
WHERE
l_linenumber IS DISTINCT FROM 1 AND
l_orderkey IS DISTINCT FROM 8997
ORDER BY
l_linenumber
LIMIT 1;
l_linenumber
--------------
2
(1 row)
-- distinct expressions in the WHERE clause with expressions and a column the target list
SELECT max(l_linenumber), min(l_discount), l_receiptdate FROM lineitem
WHERE
l_linenumber IS DISTINCT FROM 1 AND
l_orderkey IS DISTINCT FROM 8997
GROUP BY
l_receiptdate
ORDER BY
l_receiptdate
LIMIT 1;
max | min | l_receiptdate
-----+------+---------------
3 | 0.07 | 01-09-1992
(1 row)
-- Check that we can handle implicit and explicit join clause definitions.
SELECT count(*) FROM lineitem, orders
WHERE l_orderkey = o_orderkey AND l_quantity < 5;
count
-------
951
(1 row)
SELECT count(*) FROM lineitem
JOIN orders ON l_orderkey = o_orderkey AND l_quantity < 5;
count
-------
951
(1 row)
SELECT count(*) FROM lineitem JOIN orders ON l_orderkey = o_orderkey
WHERE l_quantity < 5;
count
-------
951
(1 row)
-- Check that we make sure local joins are between columns only.
SELECT count(*) FROM lineitem, orders WHERE l_orderkey + 1 = o_orderkey;
ERROR: cannot perform local joins that involve expressions
DETAIL: local joins can be performed between columns only
-- Check that we can issue limit/offset queries
-- the subquery is recursively planned since it contains OFFSET, which is not pushdownable
SELECT * FROM (SELECT o_custkey FROM orders GROUP BY o_custkey ORDER BY o_custkey OFFSET 20) sq ORDER BY 1 LIMIT 5;
ERROR: cannot perform distributed planning on this query
DETAIL: Subqueries with offset are not supported yet
-- the subquery is recursively planned since it contains OFFSET, which is not pushdownable
SELECT * FROM (SELECT o_orderkey FROM orders ORDER BY o_orderkey OFFSET 20) sq ORDER BY 1 LIMIT 5;
ERROR: cannot perform distributed planning on this query
DETAIL: Subqueries with offset are not supported yet
-- Simple LIMIT/OFFSET with ORDER BY
SELECT o_orderkey FROM orders ORDER BY o_orderkey LIMIT 10 OFFSET 20;
o_orderkey
------------
69
70
71
96
97
98
99
100
101
102
(10 rows)
-- LIMIT/OFFSET with a subquery
SET citus.task_executor_type TO 'task-tracker';
SELECT
customer_keys.o_custkey,
SUM(order_count) AS total_order_count
FROM
(SELECT o_custkey, o_orderstatus, COUNT(*) AS order_count
FROM orders GROUP BY o_custkey, o_orderstatus ) customer_keys
GROUP BY
customer_keys.o_custkey
ORDER BY
customer_keys.o_custkey DESC
LIMIT 10 OFFSET 20;
o_custkey | total_order_count
-----------+-------------------
1466 | 1
1465 | 2
1463 | 4
1462 | 10
1460 | 1
1459 | 6
1457 | 1
1456 | 3
1454 | 2
1453 | 5
(10 rows)
SET citus.task_executor_type TO 'real-time';
SET client_min_messages TO DEBUG1;
-- Ensure that we push down LIMIT and OFFSET properly
-- No Group-By -> Push Down
CREATE TEMP TABLE temp_limit_test_1 AS
SELECT o_custkey FROM orders LIMIT 10 OFFSET 15;
DEBUG: push down of limit count: 25
-- GROUP BY without ORDER BY -> No push-down
CREATE TEMP TABLE temp_limit_test_2 AS
SELECT o_custkey FROM orders GROUP BY o_custkey LIMIT 10 OFFSET 15;
-- GROUP BY and ORDER BY non-aggregate -> push-down
CREATE TEMP TABLE temp_limit_test_3 AS
SELECT o_custkey FROM orders GROUP BY o_custkey ORDER BY o_custkey LIMIT 10 OFFSET 15;
DEBUG: push down of limit count: 25
-- GROUP BY and ORDER BY aggregate -> No push-down
CREATE TEMP TABLE temp_limit_test_4 AS
SELECT o_custkey, COUNT(*) AS ccnt FROM orders GROUP BY o_custkey ORDER BY ccnt DESC LIMIT 10 OFFSET 15;
-- OFFSET without LIMIT
SELECT o_custkey FROM orders ORDER BY o_custkey OFFSET 2980;
o_custkey
-----------
1498
1499
1499
1499
(4 rows)
-- LIMIT/OFFSET with Joins
SELECT
li.l_partkey,
o.o_custkey,
li.l_quantity
FROM
lineitem li JOIN orders o ON li.l_orderkey = o.o_orderkey
WHERE
li.l_quantity > 25
ORDER BY 1, 2, 3
LIMIT 10 OFFSET 20;
DEBUG: push down of limit count: 30
l_partkey | o_custkey | l_quantity
-----------+-----------+------------
655 | 58 | 50.00
669 | 319 | 34.00
699 | 1255 | 50.00
716 | 61 | 45.00
723 | 14 | 36.00
802 | 754 | 50.00
831 | 589 | 32.00
835 | 67 | 33.00
864 | 439 | 32.00
875 | 13 | 43.00
(10 rows)
RESET client_min_messages;
-- FILTERs
SELECT
l_orderkey,
sum(l_extendedprice),
sum(l_extendedprice) FILTER (WHERE l_shipmode = 'AIR'),
count(*),
count(*) FILTER (WHERE l_shipmode = 'AIR'),
max(l_extendedprice),
max(l_extendedprice) FILTER (WHERE l_quantity < 30)
FROM lineitem
GROUP BY l_orderkey
ORDER BY 2 DESC, 1 DESC
LIMIT 10;
l_orderkey | sum | sum | count | count | max | max
------------+-----------+-----------+-------+-------+-----------+----------
12804 | 440012.71 | 45788.16 | 7 | 1 | 94398.00 | 45788.16
9863 | 412560.63 | 175647.63 | 7 | 3 | 85723.77 | 50769.14
2567 | 412076.77 | 59722.26 | 7 | 1 | 94894.00 | 9784.02
11142 | 410502.38 | 44965.95 | 7 | 1 | 83989.44 | 44965.95
12039 | 407048.94 | 76406.30 | 7 | 2 | 94471.02 | 19679.30
2306 | 405629.96 | 28032.60 | 7 | 1 | 92838.00 | 44384.50
5606 | 403595.91 | 36531.51 | 7 | 2 | 94890.18 | 30582.75
11296 | 399079.89 | | 6 | 0 | 102449.00 | 33122.93
11046 | 391163.26 | 31436.34 | 7 | 2 | 94506.24 | 47519.76
4421 | 387313.12 | | 7 | 0 | 67301.52 | 23783.40
(10 rows)
SELECT
l_orderkey,
sum(l_extendedprice),
sum(l_extendedprice) FILTER (WHERE l_shipmode = 'AIR'),
count(*),
count(*) FILTER (WHERE l_shipmode = 'AIR'),
max(l_extendedprice),
max(l_extendedprice) FILTER (WHERE l_quantity < 30)
FROM lineitem
GROUP BY l_orderkey
HAVING count(*) FILTER (WHERE l_shipmode = 'AIR') > 1
ORDER BY 2 DESC, 1 DESC
LIMIT 10;
l_orderkey | sum | sum | count | count | max | max
------------+-----------+-----------+-------+-------+----------+----------
9863 | 412560.63 | 175647.63 | 7 | 3 | 85723.77 | 50769.14
12039 | 407048.94 | 76406.30 | 7 | 2 | 94471.02 | 19679.30
5606 | 403595.91 | 36531.51 | 7 | 2 | 94890.18 | 30582.75
11046 | 391163.26 | 31436.34 | 7 | 2 | 94506.24 | 47519.76
14499 | 384140.30 | 67867.08 | 7 | 2 | 84335.36 | 46169.75
11623 | 380598.48 | 133709.82 | 7 | 2 | 93701.54 | 21487.65
10787 | 375688.09 | 99424.78 | 7 | 2 | 76732.67 | 50946.91
12902 | 358191.24 | 76891.00 | 7 | 2 | 82008.08 | 35602.08
3747 | 353701.23 | 68592.23 | 7 | 2 | 67181.10 | 46252.77
5158 | 349889.05 | 159753.19 | 7 | 3 | 78714.67 | 29729.20
(10 rows)

57
src/test/regress/expected/multi_insert_select.out
View File

@ -1047,7 +1047,7 @@ FROM (SELECT SUM(raw_events_second.value_4) AS v4,
GROUP BY raw_events_second.user_id) AS foo;
ERROR: cannot perform distributed planning for the given modification
DETAIL: Select query cannot be pushed down to the worker.
-- INSERT partition column does not match with SELECT partition column
-- INSERT returns NULL partition key value via coordinator
INSERT INTO agg_events
(value_4_agg,
value_1_agg,
@ -1064,9 +1064,22 @@ FROM (SELECT SUM(raw_events_second.value_4) AS v4,
GROUP BY raw_events_second.value_3) AS foo;
DEBUG: Group by list without distribution column is not allowed in distributed INSERT ... SELECT queries
DEBUG: Collecting INSERT ... SELECT results on coordinator
ERROR: cannot push down this subquery
DETAIL: Group by list without partition column is currently unsupported
DEBUG: join prunable for intervals [-2147483648,-1073741825] and [-1073741824,-1]
DEBUG: join prunable for intervals [-2147483648,-1073741825] and [0,1073741823]
DEBUG: join prunable for intervals [-2147483648,-1073741825] and [1073741824,2147483647]
DEBUG: join prunable for intervals [-1073741824,-1] and [-2147483648,-1073741825]
DEBUG: join prunable for intervals [-1073741824,-1] and [0,1073741823]
DEBUG: join prunable for intervals [-1073741824,-1] and [1073741824,2147483647]
DEBUG: join prunable for intervals [0,1073741823] and [-2147483648,-1073741825]
DEBUG: join prunable for intervals [0,1073741823] and [-1073741824,-1]
DEBUG: join prunable for intervals [0,1073741823] and [1073741824,2147483647]
DEBUG: join prunable for intervals [1073741824,2147483647] and [-2147483648,-1073741825]
DEBUG: join prunable for intervals [1073741824,2147483647] and [-1073741824,-1]
DEBUG: join prunable for intervals [1073741824,2147483647] and [0,1073741823]
DEBUG: generating subplan 86_1 for subquery SELECT sum(raw_events_second.value_4) AS v4, sum(raw_events_first.value_1) AS v1, raw_events_second.value_3 AS id FROM public.raw_events_first, public.raw_events_second WHERE (raw_events_first.user_id = raw_events_second.user_id) GROUP BY raw_events_second.value_3
DEBUG: Creating router plan
DEBUG: Plan is router executable
ERROR: the partition column of table public.agg_events cannot be NULL
-- error cases
-- no part column at all
INSERT INTO raw_events_second
@ -1156,8 +1169,7 @@ DETAIL: The target table's partition column should correspond to a partition co
DEBUG: Collecting INSERT ... SELECT results on coordinator
DEBUG: Creating router plan
DEBUG: Plan is router executable
-- unsupported joins between subqueries
-- we do not return bare partition column on the inner query
-- foo2 is recursively planned and INSERT...SELECT is done via coordinator
INSERT INTO agg_events
(user_id)
SELECT f2.id FROM
@ -1182,12 +1194,23 @@ FROM (SELECT SUM(raw_events_second.value_4) AS v4,
ON (f.id = f2.id);
DEBUG: Group by list without distribution column is not allowed in distributed INSERT ... SELECT queries
DEBUG: Collecting INSERT ... SELECT results on coordinator
ERROR: cannot pushdown the subquery since all relations are not joined using distribution keys
DETAIL: Each relation should be joined with at least one another relation using distribution keys and equality operator.
DEBUG: join prunable for intervals [-2147483648,-1073741825] and [-1073741824,-1]
DEBUG: join prunable for intervals [-2147483648,-1073741825] and [0,1073741823]
DEBUG: join prunable for intervals [-2147483648,-1073741825] and [1073741824,2147483647]
DEBUG: join prunable for intervals [-1073741824,-1] and [-2147483648,-1073741825]
DEBUG: join prunable for intervals [-1073741824,-1] and [0,1073741823]
DEBUG: join prunable for intervals [-1073741824,-1] and [1073741824,2147483647]
DEBUG: join prunable for intervals [0,1073741823] and [-2147483648,-1073741825]
DEBUG: join prunable for intervals [0,1073741823] and [-1073741824,-1]
DEBUG: join prunable for intervals [0,1073741823] and [1073741824,2147483647]
DEBUG: join prunable for intervals [1073741824,2147483647] and [-2147483648,-1073741825]
DEBUG: join prunable for intervals [1073741824,2147483647] and [-1073741824,-1]
DEBUG: join prunable for intervals [1073741824,2147483647] and [0,1073741823]
DEBUG: generating subplan 105_1 for subquery SELECT sum(raw_events_second.value_4) AS v4, raw_events_second.value_1 AS v1, sum(raw_events_second.user_id) AS id FROM public.raw_events_first, public.raw_events_second WHERE (raw_events_first.user_id = raw_events_second.user_id) GROUP BY raw_events_second.value_1 HAVING (sum(raw_events_second.value_4) > (10)::numeric)
-- the second part of the query is not routable since
-- GROUP BY not on the partition column (i.e., value_1) and thus join
-- on f.id = f2.id is not on the partition key (instead on the sum of partition key)
-- but we still recursively plan foo2 and run the query
INSERT INTO agg_events
(user_id)
SELECT f.id FROM
@ -1212,8 +1235,18 @@ FROM (SELECT SUM(raw_events_second.value_4) AS v4,
ON (f.id = f2.id);
DEBUG: Group by list without distribution column is not allowed in distributed INSERT ... SELECT queries
DEBUG: Collecting INSERT ... SELECT results on coordinator
ERROR: cannot pushdown the subquery since all relations are not joined using distribution keys
DETAIL: Each relation should be joined with at least one another relation using distribution keys and equality operator.
DEBUG: join prunable for intervals [-2147483648,-1073741825] and [-1073741824,-1]
DEBUG: join prunable for intervals [-2147483648,-1073741825] and [0,1073741823]
DEBUG: join prunable for intervals [-2147483648,-1073741825] and [1073741824,2147483647]
DEBUG: join prunable for intervals [-1073741824,-1] and [-2147483648,-1073741825]
DEBUG: join prunable for intervals [-1073741824,-1] and [0,1073741823]
DEBUG: join prunable for intervals [-1073741824,-1] and [1073741824,2147483647]
DEBUG: join prunable for intervals [0,1073741823] and [-2147483648,-1073741825]
DEBUG: join prunable for intervals [0,1073741823] and [-1073741824,-1]
DEBUG: join prunable for intervals [0,1073741823] and [1073741824,2147483647]
DEBUG: join prunable for intervals [1073741824,2147483647] and [-2147483648,-1073741825]
DEBUG: join prunable for intervals [1073741824,2147483647] and [-1073741824,-1]
DEBUG: join prunable for intervals [1073741824,2147483647] and [0,1073741823]
DEBUG: generating subplan 108_1 for subquery SELECT sum(raw_events_second.value_4) AS v4, raw_events_second.value_1 AS v1, sum(raw_events_second.user_id) AS id FROM public.raw_events_first, public.raw_events_second WHERE (raw_events_first.user_id = raw_events_second.user_id) GROUP BY raw_events_second.value_1 HAVING (sum(raw_events_second.value_4) > (10)::numeric)
-- cannot pushdown the query since the JOIN is not equi JOIN
INSERT INTO agg_events
@ -1630,8 +1663,8 @@ HINT: Consider using an equality filter on the distributed table's partition co
SET client_min_messages TO INFO;
-- avoid constraint violations
TRUNCATE raw_events_first;
-- we don't support LIMIT even if it exists in the subqueries
-- in where clause
-- we don't support LIMIT for subquery pushdown, but
-- we recursively plan the query and run it via coordinator
INSERT INTO agg_events(user_id)
SELECT user_id
FROM users_table
@ -1653,8 +1686,6 @@ WHERE user_id
) as f_inner
)
) AS f2);
ERROR: cannot push down this subquery
DETAIL: Limit in subquery is currently unsupported
-- Altering a table and selecting from it using a multi-shard statement
-- in the same transaction is allowed because we will use the same
-- connections for all co-located placements.

4
src/test/regress/expected/multi_insert_select_non_pushable_queries.out
View File

@ -676,7 +676,7 @@ FROM
WHERE users_table.value_1 < 50;
ERROR: cannot perform distributed planning for the given modification
DETAIL: Select query cannot be pushed down to the worker.
-- not supported since one of the queries doesn't have a relation
-- supported via recursive planning
INSERT INTO agg_results (user_id, agg_time, value_2_agg)
SELECT
user_id,
@ -702,5 +702,3 @@ FROM (
GROUP BY user_id
) AS shard_union
ORDER BY user_lastseen DESC;
ERROR: cannot push down this subquery
DETAIL: Subqueries without a FROM clause can only contain immutable functions

1
src/test/regress/expected/multi_mx_router_planner.out
View File

@ -508,6 +508,7 @@ HINT: Set citus.enable_repartition_joins to on to enable repartitioning
-- subqueries are not supported in SELECT clause
SELECT a.title AS name, (SELECT a2.id FROM articles_single_shard_hash_mx a2 WHERE a.id = a2.id LIMIT 1)
AS special_price FROM articles_hash_mx a;
DEBUG: skipping recursive planning for the subquery since it contains references to outer queries
ERROR: could not run distributed query with subquery outside the FROM and WHERE clauses
HINT: Consider using an equality filter on the distributed table's partition column.
-- simple lookup query

23
src/test/regress/expected/multi_read_from_secondaries.out
View File

@ -51,6 +51,29 @@ SELECT a FROM dest_table;
2
(2 rows)
-- subqueries are also allowed
SET client_min_messages TO DEBUG1;
SELECT
foo.a
FROM
(
WITH cte AS (
SELECT
DISTINCT dest_table.a
FROM
dest_table, source_table
WHERE
source_table.a = dest_table.a AND
dest_table.b IN (1,2,3,4)
) SELECT * FROM cte ORDER BY 1 DESC LIMIT 5
) as foo;
DEBUG: generating subplan 4_1 for CTE cte: SELECT DISTINCT dest_table.a FROM public.dest_table, public.source_table WHERE ((source_table.a = dest_table.a) AND (dest_table.b = ANY (ARRAY[1, 2, 3, 4])))
DEBUG: generating subplan 4_2 for subquery SELECT a FROM (SELECT intermediate_result.a FROM read_intermediate_result('4_1'::text, 'binary'::citus_copy_format) intermediate_result(a integer)) cte ORDER BY a DESC LIMIT 5
a
---
(0 rows)
SET client_min_messages TO DEFAULT;
-- insert into is definitely not allowed
INSERT INTO dest_table (a, b)
SELECT a, b FROM source_table;

1
src/test/regress/expected/multi_router_planner.out
View File

@ -623,6 +623,7 @@ HINT: Set citus.enable_repartition_joins to on to enable repartitioning
-- subqueries are not supported in SELECT clause
SELECT a.title AS name, (SELECT a2.id FROM articles_single_shard_hash a2 WHERE a.id = a2.id LIMIT 1)
AS special_price FROM articles_hash a;
DEBUG: skipping recursive planning for the subquery since it contains references to outer queries
ERROR: could not run distributed query with subquery outside the FROM and WHERE clauses
HINT: Consider using an equality filter on the distributed table's partition column.
-- simple lookup query

6
src/test/regress/expected/multi_simple_queries.out
View File

@ -195,8 +195,12 @@ SELECT * FROM articles, position('om' in 'Thomas') ORDER BY 2 DESC, 1 DESC, 3 DE
10 | 10 | aggrandize | 17277 | 3
(5 rows)
-- subqueries are supported in WHERE clause in Citus even if the relations are not distributed
SELECT * FROM articles WHERE author_id IN (SELECT id FROM authors WHERE name LIKE '%a');
ERROR: relation authors is not distributed
id | author_id | title | word_count
----+-----------+-------+------------
(0 rows)
-- subqueries are supported in FROM clause
SELECT articles.id,test.word_count
FROM articles, (SELECT id, word_count FROM articles) AS test WHERE test.id = articles.id

27
src/test/regress/expected/multi_subquery.out
View File

@ -28,8 +28,7 @@ SET
shardmaxvalue = '14947'
WHERE
shardid IN (SELECT shardid FROM pg_dist_shard WHERE logicalrelid = 'orders_subquery'::regclass ORDER BY shardid DESC LIMIT 1);
-- If group by is not on partition column then we error out from single table
-- repartition code path
-- If group by is not on partition column then we recursively plan
SELECT
avg(order_count)
FROM
@ -40,8 +39,7 @@ FROM
lineitem_subquery
GROUP BY
l_suppkey) AS order_counts;
ERROR: the query contains a join that requires repartitioning
HINT: Set citus.enable_repartition_joins to on to enable repartitioning
ERROR: cannot handle complex subqueries when the router executor is disabled
-- Check that we error out if join is not on partition columns.
SELECT
avg(unit_price)
@ -71,12 +69,15 @@ FROM
l_orderkey) AS unit_prices;
ERROR: cannot pushdown the subquery since all relations are not joined using distribution keys
DETAIL: Each relation should be joined with at least one another relation using distribution keys and equality operator.
-- Subqueries without relation with a volatile functions (non-constant)
-- Subqueries without relation with a volatile functions (non-constant) are planned recursively
SELECT count(*) FROM (
SELECT l_orderkey FROM lineitem_subquery JOIN (SELECT random()::int r) sub ON (l_orderkey = r)
SELECT l_orderkey FROM lineitem_subquery JOIN (SELECT random()::int r) sub ON (l_orderkey = r) WHERE r > 10
) b;
ERROR: cannot push down this subquery
DETAIL: Subqueries without a FROM clause can only contain immutable functions
count
-------
0
(1 row)
-- Check that we error out if there is non relation subqueries
SELECT count(*) FROM
(
@ -103,7 +104,8 @@ SELECT count(*) FROM
2985
(1 row)
-- Check that we error out if inner query has Limit but subquery_pushdown is not set
-- we'd error out if inner query has Limit but subquery_pushdown is not set
-- but we recursively plan the query
SELECT
avg(o_totalprice/l_quantity)
FROM
@ -123,8 +125,11 @@ FROM
orders_subquery
WHERE
lineitem_quantities.l_orderkey = o_orderkey) orders_price ON true;
ERROR: cannot push down this subquery
DETAIL: Limit in subquery is currently unsupported
avg
-------------------------
129027.1270000000000000
(1 row)
-- Limit is only supported when subquery_pushdown is set
-- Check that we error out if inner query has limit but outer query has not.
SET citus.subquery_pushdown to ON;

33
src/test/regress/expected/multi_subquery_complex_queries.out
View File

@ -1185,7 +1185,9 @@ limit 50;
-- reset subquery_pushdown
SET citus.subquery_pushdown to OFF;
-- not supported since JOIN is not on the partition key
-- we recursively plan recent_events_1
-- but not some_users_data since it has a reference
-- from an outer query which is not recursively planned
SELECT "some_users_data".user_id, lastseen
FROM
(SELECT user_id, max(time) AS lastseen
@ -1218,10 +1220,11 @@ FROM
ORDER BY
user_id
limit 50;
ERROR: cannot pushdown the subquery since all relations are not joined using distribution keys
DETAIL: Each relation should be joined with at least one another relation using distribution keys and equality operator.
-- not supported since JOIN is not on the partition key
-- see (2 * user_id as user_id) target list element
ERROR: cannot push down this subquery
DETAIL: Limit in subquery is currently unsupported
-- we recursively plan some queries but fail in the end
-- since some_users_data since it has a reference
-- from an outer query which is not recursively planned
SELECT "some_users_data".user_id, lastseen
FROM
(SELECT 2 * user_id as user_id, max(time) AS lastseen
@ -1254,8 +1257,8 @@ FROM
ORDER BY
user_id
limit 50;
ERROR: cannot pushdown the subquery since all relations are not joined using distribution keys
DETAIL: Each relation should be joined with at least one another relation using distribution keys and equality operator.
ERROR: cannot push down this subquery
DETAIL: Limit in subquery is currently unsupported
-- LATERAL JOINs used with INNER JOINs
SET citus.subquery_pushdown to ON;
SELECT user_id, lastseen
@ -1550,7 +1553,9 @@ ORDER BY
LIMIT 10;
ERROR: cannot pushdown the subquery since all relations are not joined using distribution keys
DETAIL: Each relation should be joined with at least one another relation using distribution keys and equality operator.
-- not supported since lower LATERAL JOIN is not on the partition key
-- not pushdownable since lower LATERAL JOIN is not on the partition key
-- not recursively plannable due to LATERAL join where there is a reference
-- from an outer query
SELECT user_id, lastseen
FROM
(SELECT
@ -1603,8 +1608,8 @@ FROM
ORDER BY
user_id DESC
LIMIT 10;
ERROR: cannot pushdown the subquery since all relations are not joined using distribution keys
DETAIL: Each relation should be joined with at least one another relation using distribution keys and equality operator.
ERROR: cannot push down this subquery
DETAIL: Limit in subquery is currently unsupported
-- NESTED INNER JOINs
SELECT
count(*) AS value, "generated_group_field"
@ -2168,7 +2173,9 @@ LIMIT 10;
(1 row)
SET citus.subquery_pushdown to OFF;
-- not supported since join is not on the partition key
-- not pushdownable since lower LATERAL JOIN is not on the partition key
-- not recursively plannable due to LATERAL join where there is a reference
-- from an outer query
SELECT *
FROM
(SELECT
@ -2206,8 +2213,8 @@ FROM
ORDER BY
value_2 DESC, user_id DESC
LIMIT 10;
ERROR: cannot pushdown the subquery since all relations are not joined using distribution keys
DETAIL: Each relation should be joined with at least one another relation using distribution keys and equality operator.
ERROR: cannot push down this subquery
DETAIL: Limit in subquery is currently unsupported
-- lets test some unsupported set operations
-- not supported since we use INTERSECT
SELECT ("final_query"."event_types") as types, count(*) AS sumOfEventType

35
src/test/regress/expected/multi_subquery_complex_reference_clause.out
View File

@ -1203,15 +1203,16 @@ SELECT foo.user_id FROM
---------
(0 rows)
-- not supported since group by is on the reference table column
-- not pushdownable since group by is on the reference table column
-- recursively planned, but hits unsupported clause type error on the top level query
SELECT foo.user_id FROM
(
SELECT r.user_id, random() FROM users_table m JOIN events_reference_table r ON int4eq(m.user_id, r.user_id)
GROUP BY r.user_id
) as foo;
ERROR: cannot push down this subquery
DETAIL: Group by list without partition column is currently unsupported
-- supported since the group by contains at least one distributed table
ERROR: unsupported clause type
-- not pushdownable since the group by contains at least one distributed table
-- recursively planned, but hits unsupported clause type error on the top level query
SELECT foo.user_id FROM
(
SELECT r.user_id, random() FROM users_table m JOIN events_reference_table r ON int4eq(m.user_id, r.user_id)
@ -1225,20 +1226,19 @@ ORDER BY 1 LIMIT 3;
3
(3 rows)
-- not supported since distinct is on the reference table column
-- not pushdownable since distinct is on the reference table column
-- recursively planned, but hits unsupported clause type error on the top level query
SELECT foo.user_id FROM
(
SELECT DISTINCT r.user_id, random() FROM users_table m JOIN events_reference_table r ON int4eq(m.user_id, r.user_id)
) as foo;
ERROR: cannot push down this subquery
DETAIL: Distinct on columns without partition column is currently unsupported
ERROR: unsupported clause type
-- not supported since distinct on is on the reference table column
SELECT foo.user_id FROM
(
SELECT DISTINCT ON(r.user_id) r.user_id, random() FROM users_table m JOIN events_reference_table r ON int4eq(m.user_id, r.user_id)
) as foo;
ERROR: cannot push down this subquery
DETAIL: Distinct on columns without partition column is currently unsupported
ERROR: unsupported clause type
-- supported since the distinct on contains at least one distributed table
SELECT foo.user_id FROM
(
@ -1310,28 +1310,26 @@ OFFSET 0;
(5 rows)
-- should not push down this query since there is a distributed table (i.e., events_table)
-- which is not in the DISTINCT clause
-- which is not in the DISTINCT clause. Recursive planning also fails since router execution
-- is disabled
SELECT * FROM
(
SELECT DISTINCT users_reference_table.user_id FROM users_reference_table, events_table WHERE users_reference_table.user_id = events_table.value_4
) as foo;
ERROR: cannot push down this subquery
DETAIL: Distinct on columns without partition column is currently unsupported
ERROR: cannot handle complex subqueries when the router executor is disabled
SELECT * FROM
(
SELECT users_reference_table.user_id FROM users_reference_table, events_table WHERE users_reference_table.user_id = events_table.value_4
GROUP BY 1
) as foo;
ERROR: cannot push down this subquery
DETAIL: Group by list without partition column is currently unsupported
ERROR: cannot handle complex subqueries when the router executor is disabled
-- similiar to the above examples, this time there is a subquery
-- whose output is not in the DISTINCT clause
SELECT * FROM
(
SELECT DISTINCT users_reference_table.user_id FROM users_reference_table, (SELECT user_id, random() FROM events_table) as us_events WHERE users_reference_table.user_id = us_events.user_id
) as foo;
ERROR: cannot push down this subquery
DETAIL: Distinct on columns without partition column is currently unsupported
ERROR: cannot handle complex subqueries when the router executor is disabled
-- the following query is safe to push down since the DISTINCT clause include distribution column
SELECT * FROM
(
@ -1348,6 +1346,8 @@ LIMIT 4;
(4 rows)
-- should not pushdown since there is a non partition column on the DISTINCT clause
-- Recursive planning also fails since router execution
-- is disabled
SELECT * FROM
(
SELECT
@ -1360,8 +1360,7 @@ SELECT * FROM
) as foo
ORDER BY 1 DESC
LIMIT 4;
ERROR: cannot push down this subquery
DETAIL: Distinct on columns without partition column is currently unsupported
ERROR: cannot handle complex subqueries when the router executor is disabled
-- test the read_intermediate_result() for GROUP BYs
BEGIN;

22
src/test/regress/expected/multi_subquery_in_where_clause.out
View File

@ -582,17 +582,20 @@ LIMIT 2;
(2 rows)
-- subquery in where clause has a volatile function and no relation
-- thus we recursively plan it
SELECT
user_id
FROM
users_table
WHERE
value_2 >
(SELECT random())
(SELECT random()) AND user_id < 0
ORDER BY 1 ASC
LIMIT 2;
ERROR: cannot push down this subquery
DETAIL: Subqueries without a FROM clause can only contain immutable functions
user_id
---------
(0 rows)
-- OFFSET is not supported in the subquey
SELECT
user_id
@ -614,7 +617,8 @@ ERROR: cannot push down this subquery
DETAIL: Offset clause is currently unsupported
-- we can detect unsupported subquerues even if they appear
-- in WHERE subquery -> FROM subquery -> WHERE subquery
SELECT user_id
-- but we can recursively plan that anyway
SELECT DISTINCT user_id
FROM users_table
WHERE user_id
IN (SELECT
@ -638,9 +642,13 @@ WHERE user_id
AND e1.user_id IN (SELECT user_id FROM users_table LIMIT 3 )
) as f_outer
WHERE f_inner.user_id = f_outer.user_id
);
ERROR: cannot push down this subquery
DETAIL: Limit in subquery is currently unsupported
) ORDER BY 1 LIMIT 3;
user_id
---------
1
5
(2 rows)
-- semi join is not on the partition key for the third subquery
SELECT user_id
FROM users_table

13
src/test/regress/expected/multi_subquery_union.out
View File

@ -739,6 +739,8 @@ LIMIT 5;
-- now lets also have some unsupported queries
-- group by is not on the partition key
-- but we can still recursively plan it, though that is not suffient for pushdown
-- of the whole query
SELECT user_id, sum(counter)
FROM (
SELECT user_id, sum(value_2) AS counter FROM events_table GROUP BY user_id
@ -1030,7 +1032,9 @@ FROM
) b;
ERROR: cannot pushdown the subquery since not all subqueries in the UNION have the partition column in the same position
DETAIL: Each leaf query of the UNION should return the partition column in the same position and all joins must be on the partition column
-- we don't support subqueries without relations
-- we don't support pushing down subqueries without relations
-- recursive planning can replace that query, though the whole
-- query is not safe to pushdown
SELECT
count(*)
FROM
@ -1041,7 +1045,9 @@ FROM
) b;
ERROR: could not run distributed query with UNION, INTERSECT, or EXCEPT
HINT: Consider using an equality filter on the distributed table's partition column.
-- we don't support subqueries without relations
-- we don't support pushing down subqueries without relations
-- recursive planning can replace that query, though the whole
-- query is not safe to pushdown
SELECT
*
FROM
@ -1073,6 +1079,9 @@ ORDER BY 1 DESC, 2 DESC
LIMIT 5;
ERROR: could not run distributed query with UNION, INTERSECT, or EXCEPT
HINT: Consider using an equality filter on the distributed table's partition column.
-- we don't support pushing down subqueries without relations
-- recursive planning can replace that query, though the whole
-- query is not safe to pushdown
SELECT ("final_query"."event_types") as types, count(*) AS sumOfEventType
FROM
( SELECT *, random()

104
src/test/regress/expected/multi_view.out
View File

@ -287,9 +287,17 @@ SET citus.task_executor_type to DEFAULT;
-- create a view with aggregate
CREATE VIEW lineitems_by_shipping_method AS
SELECT l_shipmode, count(*) as cnt FROM lineitem_hash_part GROUP BY 1;
-- following will fail due to non GROUP BY of partition key
SELECT * FROM lineitems_by_shipping_method;
ERROR: Unrecognized range table id 1
-- following will be supported via recursive planning
SELECT * FROM lineitems_by_shipping_method ORDER BY 1,2 LIMIT 5;
l_shipmode | cnt
------------+------
AIR | 1706
FOB | 1709
MAIL | 1739
RAIL | 1706
REG AIR | 1679
(5 rows)
-- create a view with group by on partition column
CREATE VIEW lineitems_by_orderkey AS
SELECT
@ -631,21 +639,39 @@ SELECT * FROM distinct_user_with_value_1_3 ORDER BY user_id;
(6 rows)
-- distinct is not supported if it is on a non-partition key
-- but will be supported via recursive planning
CREATE VIEW distinct_value_1 AS SELECT DISTINCT value_1 FROM users_table WHERE value_2 = 3;
SELECT * FROM distinct_value_1;
ERROR: cannot perform distributed planning on this query
DETAIL: Subqueries without group by clause are not supported yet
-- CTEs are not supported even if they are on views
SELECT * FROM distinct_value_1 ORDER BY 1 DESC LIMIT 5;
value_1
---------
5
4
3
2
1
(5 rows)
-- CTEs are supported even if they are on views
CREATE VIEW cte_view_1 AS
WITH c1 AS (SELECT * FROM users_table WHERE value_1 = 3) SELECT * FROM c1 WHERE value_2 < 4;
SELECT * FROM cte_view_1;
ERROR: cannot push down this subquery
DETAIL: CTEs in subqueries are currently unsupported
-- this is single shard query but still not supported since it has view + cte
SELECT * FROM cte_view_1 ORDER BY 1,2,3,4,5 LIMIT 5;
user_id | time | value_1 | value_2 | value_3 | value_4
---------+---------------------------------+---------+---------+---------+---------
1 | Thu Nov 23 03:32:50.803031 2017 | 3 | 2 | 1 |
2 | Thu Nov 23 13:52:54.83829 2017 | 3 | 1 | 4 |
3 | Wed Nov 22 23:24:32.080584 2017 | 3 | 2 | 5 |
4 | Wed Nov 22 23:59:46.493416 2017 | 3 | 1 | 3 |
4 | Thu Nov 23 01:55:21.824618 2017 | 3 | 1 | 4 |
(5 rows)
-- this is single shard query and still not supported since it has view + cte
-- router planner can't detect it
SELECT * FROM cte_view_1 WHERE user_id = 2;
ERROR: cannot push down this subquery
DETAIL: CTEs in subqueries are currently unsupported
SELECT * FROM cte_view_1 WHERE user_id = 2 ORDER BY 1,2,3,4,5;
user_id | time | value_1 | value_2 | value_3 | value_4
---------+--------------------------------+---------+---------+---------+---------
2 | Thu Nov 23 13:52:54.83829 2017 | 3 | 1 | 4 |
(1 row)
-- if CTE itself prunes down to a single shard than the view is supported (router plannable)
CREATE VIEW cte_view_2 AS
WITH c1 AS (SELECT * FROM users_table WHERE user_id = 2) SELECT * FROM c1 WHERE value_1 = 3;
@ -687,8 +713,16 @@ CREATE VIEW recent_10_users AS
LIMIT 10;
-- this is not supported since it has limit in it and subquery_pushdown is not set
SELECT * FROM recent_10_users;
ERROR: cannot perform distributed planning on this query
DETAIL: Subqueries with limit are not supported yet
user_id | lastseen
---------+---------------------------------
1 | Thu Nov 23 17:30:34.635085 2017
3 | Thu Nov 23 17:18:51.048758 2017
5 | Thu Nov 23 16:48:32.08896 2017
4 | Thu Nov 23 15:32:02.360969 2017
6 | Thu Nov 23 14:43:18.024104 2017
2 | Thu Nov 23 13:52:54.83829 2017
(6 rows)
SET citus.subquery_pushdown to ON;
-- still not supported since outer query does not have limit
-- it shows a different (subquery with single relation) error message
@ -792,9 +826,43 @@ EXPLAIN (COSTS FALSE) SELECT *
(23 rows)
EXPLAIN (COSTS FALSE) SELECT et.* FROM recent_10_users JOIN events_table et USING(user_id) ORDER BY et.time DESC LIMIT 10;
ERROR: cannot push down this subquery
DETAIL: Limit in subquery is currently unsupported
QUERY PLAN
---------------------------------------------------------------------------------------------------------------------
Limit
-> Sort
Sort Key: remote_scan."time" DESC
-> Custom Scan (Citus Real-Time)
-> Distributed Subplan 83_1
-> Limit
-> Sort
Sort Key: max((max(remote_scan.lastseen))) DESC
-> HashAggregate
Group Key: remote_scan.user_id
-> Custom Scan (Citus Real-Time)
Task Count: 4
Tasks Shown: One of 4
-> Task
Node: host=localhost port=57637 dbname=regression
-> Limit
-> Sort
Sort Key: (max("time")) DESC
-> HashAggregate
Group Key: user_id
-> Seq Scan on users_table_1400000 users_table
Task Count: 4
Tasks Shown: One of 4
-> Task
Node: host=localhost port=57637 dbname=regression
-> Limit
-> Sort
Sort Key: et."time" DESC
-> Hash Join
Hash Cond: (intermediate_result.user_id = et.user_id)
-> Function Scan on read_intermediate_result intermediate_result
-> Hash
-> Seq Scan on events_table_1400004 et
(33 rows)
SET citus.subquery_pushdown to ON;
EXPLAIN (COSTS FALSE) SELECT et.* FROM recent_10_users JOIN events_table et USING(user_id) ORDER BY et.time DESC LIMIT 10;
QUERY PLAN

194
src/test/regress/expected/subqueries_deep.out Normal file
View File

@ -0,0 +1,194 @@
-- ===================================================================
-- test recursive planning functionality with subqueries and CTEs
-- ===================================================================
CREATE SCHEMA subquery_deep;
SET search_path TO subquery_and_ctes, public;
SET client_min_messages TO DEBUG1;
-- subquery in FROM -> FROM -> FROM should be replaced due to OFFSET
-- one level up subquery should be replaced due to GROUP BY on non partition key
-- one level up subquery should be replaced due to LIMUT
SELECT
DISTINCT user_id
FROM
(
SELECT users_table.user_id FROM users_table,
(
SELECT
avg(event_type) as avg_val
FROM
(SELECT event_type, users_table.user_id FROM users_table,
(SELECT user_id, event_type FROM events_table WHERE value_2 < 3 OFFSET 3) as foo
WHERE foo.user_id = users_table.user_id
) bar, users_table WHERE bar.user_id = users_table.user_id GROUP BY users_table.value_1
) as baz
WHERE baz.avg_val < users_table.user_id
LIMIT 3
) as sub1
ORDER BY 1 DESC;
DEBUG: generating subplan 1_1 for subquery SELECT user_id, event_type FROM public.events_table WHERE (value_2 < 3) OFFSET 3
DEBUG: generating subplan 1_2 for subquery SELECT avg(bar.event_type) AS avg_val FROM (SELECT foo.event_type, users_table_1.user_id FROM public.users_table users_table_1, (SELECT intermediate_result.user_id, intermediate_result.event_type FROM read_intermediate_result('1_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer, event_type integer)) foo WHERE (foo.user_id = users_table_1.user_id)) bar, public.users_table WHERE (bar.user_id = users_table.user_id) GROUP BY users_table.value_1
DEBUG: push down of limit count: 3
DEBUG: generating subplan 1_3 for subquery SELECT users_table.user_id FROM public.users_table, (SELECT intermediate_result.avg_val FROM read_intermediate_result('1_2'::text, 'binary'::citus_copy_format) intermediate_result(avg_val numeric)) baz WHERE (baz.avg_val < (users_table.user_id)::numeric) LIMIT 3
user_id
---------
5
(1 row)
-- subquery in FROM -> FROM -> WHERE -> WHERE should be replaced due to CTE
-- subquery in FROM -> FROM -> WHERE should be replaced due to LIMIT
-- one level above should be replaced due to DISTINCT on non-partition key
-- one level above should be replaced due to GROUP BY on non-partition key
SELECT event, array_length(events_table, 1)
FROM (
SELECT event, array_agg(t.user_id) AS events_table
FROM (
SELECT
DISTINCT ON(e.event_type::text) e.event_type::text as event, e.time, e.user_id
FROM
users_table AS u,
events_table AS e
WHERE u.user_id = e.user_id AND
u.user_id IN
(
SELECT
user_id
FROM
users_table
WHERE value_2 >= 5
AND EXISTS (SELECT user_id FROM events_table WHERE event_type > 1 AND event_type <= 3 AND value_3 > 1 AND user_id = users_table.user_id)
AND NOT EXISTS (SELECT user_id FROM events_table WHERE event_type > 3 AND event_type <= 4 AND value_3 > 1 AND user_id = users_table.user_id)
AND EXISTS (WITH cte AS (SELECT count(*) FROM users_table) SELECT * FROM cte)
LIMIT 5
)
) t, users_table WHERE users_table.value_1 = t.event::int
GROUP BY event
) q
ORDER BY 2 DESC, 1;
DEBUG: generating subplan 5_1 for CTE cte: SELECT count(*) AS count FROM public.users_table
DEBUG: push down of limit count: 5
DEBUG: generating subplan 5_2 for subquery SELECT user_id FROM public.users_table WHERE ((value_2 >= 5) AND (EXISTS (SELECT events_table.user_id FROM public.events_table WHERE ((events_table.event_type > 1) AND (events_table.event_type <= 3) AND (events_table.value_3 > (1)::double precision) AND (events_table.user_id = users_table.user_id)))) AND (NOT (EXISTS (SELECT events_table.user_id FROM public.events_table WHERE ((events_table.event_type > 3) AND (events_table.event_type <= 4) AND (events_table.value_3 > (1)::double precision) AND (events_table.user_id = users_table.user_id))))) AND (EXISTS (SELECT cte.count FROM (SELECT intermediate_result.count FROM read_intermediate_result('5_1'::text, 'binary'::citus_copy_format) intermediate_result(count bigint)) cte))) LIMIT 5
DEBUG: generating subplan 5_3 for subquery SELECT DISTINCT ON ((e.event_type)::text) (e.event_type)::text AS event, e."time", e.user_id FROM public.users_table u, public.events_table e WHERE ((u.user_id = e.user_id) AND (u.user_id IN (SELECT intermediate_result.user_id FROM read_intermediate_result('5_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer))))
DEBUG: generating subplan 5_4 for subquery SELECT t.event, array_agg(t.user_id) AS events_table FROM (SELECT intermediate_result.event, intermediate_result."time", intermediate_result.user_id FROM read_intermediate_result('5_3'::text, 'binary'::citus_copy_format) intermediate_result(event text, "time" timestamp without time zone, user_id integer)) t, public.users_table WHERE (users_table.value_1 = (t.event)::integer) GROUP BY t.event
event | array_length
-------+--------------
3 | 26
4 | 21
2 | 18
1 | 15
0 | 12
5 | 9
(6 rows)
-- this test probably doesn't add too much value,
-- but recurse 6 times for fun
SELECT count(*)
FROM
(
SELECT avg(min) FROM
(
SELECT min(users_table.value_1) FROM
(
SELECT avg(event_type) as avg_ev_type FROM
(
SELECT
max(value_1) as mx_val_1
FROM (
SELECT
avg(event_type) as avg
FROM
(
SELECT
cnt
FROM
(SELECT count(*) as cnt, value_2 FROM users_table GROUP BY value_2) as level_1, users_table
WHERE
users_table.user_id = level_1.cnt
) as level_2, events_table
WHERE events_table.user_id = level_2.cnt
GROUP BY level_2.cnt
) as level_3, users_table
WHERE user_id = level_3.avg
GROUP BY level_3.avg
) as level_4, events_table
WHERE level_4.mx_val_1 = events_table.user_id
GROUP BY level_4.mx_val_1
) as level_5, users_table
WHERE
level_5.avg_ev_type = users_table.user_id
GROUP BY
level_5.avg_ev_type
) as level_6, users_table WHERE users_table.user_id = level_6.min
GROUP BY users_table.value_1
) as bar;
DEBUG: generating subplan 10_1 for subquery SELECT count(*) AS cnt, value_2 FROM public.users_table GROUP BY value_2
DEBUG: generating subplan 10_2 for subquery SELECT avg(events_table.event_type) AS avg FROM (SELECT level_1.cnt FROM (SELECT intermediate_result.cnt, intermediate_result.value_2 FROM read_intermediate_result('10_1'::text, 'binary'::citus_copy_format) intermediate_result(cnt bigint, value_2 integer)) level_1, public.users_table WHERE (users_table.user_id = level_1.cnt)) level_2, public.events_table WHERE (events_table.user_id = level_2.cnt) GROUP BY level_2.cnt
DEBUG: generating subplan 10_3 for subquery SELECT max(users_table.value_1) AS mx_val_1 FROM (SELECT intermediate_result.avg FROM read_intermediate_result('10_2'::text, 'binary'::citus_copy_format) intermediate_result(avg numeric)) level_3, public.users_table WHERE ((users_table.user_id)::numeric = level_3.avg) GROUP BY level_3.avg
DEBUG: generating subplan 10_4 for subquery SELECT avg(events_table.event_type) AS avg_ev_type FROM (SELECT intermediate_result.mx_val_1 FROM read_intermediate_result('10_3'::text, 'binary'::citus_copy_format) intermediate_result(mx_val_1 integer)) level_4, public.events_table WHERE (level_4.mx_val_1 = events_table.user_id) GROUP BY level_4.mx_val_1
DEBUG: generating subplan 10_5 for subquery SELECT min(users_table.value_1) AS min FROM (SELECT intermediate_result.avg_ev_type FROM read_intermediate_result('10_4'::text, 'binary'::citus_copy_format) intermediate_result(avg_ev_type numeric)) level_5, public.users_table WHERE (level_5.avg_ev_type = (users_table.user_id)::numeric) GROUP BY level_5.avg_ev_type
DEBUG: generating subplan 10_6 for subquery SELECT avg(level_6.min) AS avg FROM (SELECT intermediate_result.min FROM read_intermediate_result('10_5'::text, 'binary'::citus_copy_format) intermediate_result(min integer)) level_6, public.users_table WHERE (users_table.user_id = level_6.min) GROUP BY users_table.value_1
count
-------
0
(1 row)
-- same query happening in the subqueries in WHERE
-- this test probably doesn't add too much value,
-- but recurse 6 times for fun
SELECT
*
FROM
users_table
WHERE user_id IN (
SELECT count(*)
FROM
(
SELECT avg(min) FROM
(
SELECT min(users_table.value_1) FROM
(
SELECT avg(event_type) as avg_ev_type FROM
(
SELECT
max(value_1) as mx_val_1
FROM (
SELECT
avg(event_type) as avg
FROM
(
SELECT
cnt
FROM
(SELECT count(*) as cnt, value_2 FROM users_table GROUP BY value_2) as level_1, users_table
WHERE
users_table.user_id = level_1.cnt
) as level_2, events_table
WHERE events_table.user_id = level_2.cnt
GROUP BY level_2.cnt
) as level_3, users_table
WHERE user_id = level_3.avg
GROUP BY level_3.avg
) as level_4, events_table
WHERE level_4.mx_val_1 = events_table.user_id
GROUP BY level_4.mx_val_1
) as level_5, users_table
WHERE
level_5.avg_ev_type = users_table.user_id
GROUP BY
level_5.avg_ev_type
) as level_6, users_table WHERE users_table.user_id = level_6.min
GROUP BY users_table.value_1
) as bar);
DEBUG: generating subplan 17_1 for subquery SELECT count(*) AS cnt, value_2 FROM public.users_table GROUP BY value_2
DEBUG: generating subplan 17_2 for subquery SELECT avg(events_table.event_type) AS avg FROM (SELECT level_1.cnt FROM (SELECT intermediate_result.cnt, intermediate_result.value_2 FROM read_intermediate_result('17_1'::text, 'binary'::citus_copy_format) intermediate_result(cnt bigint, value_2 integer)) level_1, public.users_table WHERE (users_table.user_id = level_1.cnt)) level_2, public.events_table WHERE (events_table.user_id = level_2.cnt) GROUP BY level_2.cnt
DEBUG: generating subplan 17_3 for subquery SELECT max(users_table.value_1) AS mx_val_1 FROM (SELECT intermediate_result.avg FROM read_intermediate_result('17_2'::text, 'binary'::citus_copy_format) intermediate_result(avg numeric)) level_3, public.users_table WHERE ((users_table.user_id)::numeric = level_3.avg) GROUP BY level_3.avg
DEBUG: generating subplan 17_4 for subquery SELECT avg(events_table.event_type) AS avg_ev_type FROM (SELECT intermediate_result.mx_val_1 FROM read_intermediate_result('17_3'::text, 'binary'::citus_copy_format) intermediate_result(mx_val_1 integer)) level_4, public.events_table WHERE (level_4.mx_val_1 = events_table.user_id) GROUP BY level_4.mx_val_1
DEBUG: generating subplan 17_5 for subquery SELECT min(users_table.value_1) AS min FROM (SELECT intermediate_result.avg_ev_type FROM read_intermediate_result('17_4'::text, 'binary'::citus_copy_format) intermediate_result(avg_ev_type numeric)) level_5, public.users_table WHERE (level_5.avg_ev_type = (users_table.user_id)::numeric) GROUP BY level_5.avg_ev_type
DEBUG: generating subplan 17_6 for subquery SELECT avg(level_6.min) AS avg FROM (SELECT intermediate_result.min FROM read_intermediate_result('17_5'::text, 'binary'::citus_copy_format) intermediate_result(min integer)) level_6, public.users_table WHERE (users_table.user_id = level_6.min) GROUP BY users_table.value_1
DEBUG: generating subplan 17_7 for subquery SELECT count(*) AS count FROM (SELECT intermediate_result.avg FROM read_intermediate_result('17_6'::text, 'binary'::citus_copy_format) intermediate_result(avg numeric)) bar
user_id | time | value_1 | value_2 | value_3 | value_4
---------+------+---------+---------+---------+---------
(0 rows)
SET client_min_messages TO DEFAULT;
DROP SCHEMA subquery_deep CASCADE;
SET search_path TO public;

147
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@ -0,0 +1,147 @@
-- ===================================================================
-- test recursive planning functionality on failure cases
-- ===================================================================
CREATE SCHEMA not_supported;
SET search_path TO not_supported, public;
SET client_min_messages TO DEBUG1;
CREATE TABLE users_table_local AS SELECT * FROM users_table;
-- we don't support subqueries with local tables when they are not leaf queries
SELECT
*
FROM
(
SELECT
users_table_local.user_id
FROM
users_table_local, (SELECT user_id FROM events_table) as evs
WHERE users_table_local.user_id = evs.user_id
) as foo;
ERROR: relation users_table_local is not distributed
-- we don't support subqueries with local tables when they are not leaf queries
SELECT user_id FROM users_table WHERE user_id IN
(SELECT
user_id
FROM
users_table_local JOIN (SELECT user_id FROM events_table_local) as foo
USING (user_id)
);
ERROR: relation "events_table_local" does not exist
LINE 5: users_table_local JOIN (SELECT user_id FROM events_table_...
^
-- we don't support aggregate distinct if the group by is not on partition key, expect for count distinct
-- thus baz and bar are recursively planned but not foo
SELECT
*
FROM
(
SELECT avg(DISTINCT value_1), random() FROM users_table GROUP BY user_id OFFSET 3
) as baz,
(
SELECT count(DISTINCT value_1), random() FROM users_table GROUP BY value_2 OFFSET 3
) as bar,
(
SELECT avg(DISTINCT value_1), random() FROM users_table GROUP BY value_2 OFFSET 3
) as foo;
DEBUG: generating subplan 4_1 for subquery SELECT avg(DISTINCT value_1) AS avg, random() AS random FROM public.users_table GROUP BY user_id OFFSET 3
DEBUG: generating subplan 4_2 for subquery SELECT count(DISTINCT value_1) AS count, random() AS random FROM public.users_table GROUP BY value_2 OFFSET 3
ERROR: cannot compute aggregate (distinct)
DETAIL: table partitioning is unsuitable for aggregate (distinct)
-- we don't support array_aggs with ORDER BYs
SELECT
*
FROM
(
SELECT
array_agg(users_table.user_id ORDER BY users_table.time)
FROM
users_table, (SELECT user_id FROM events_table) as evs
WHERE users_table.user_id = evs.user_id
GROUP BY users_table.user_id
LIMIT 5
) as foo;
ERROR: array_agg with order by is unsupported
-- we don't support queries with recurring tuples in the FROM
-- clause and subquery in WHERE clause
SELECT
*
FROM
(
SELECT
users_table.user_id
FROM
users_table, (SELECT user_id FROM events_table) as evs
WHERE users_table.user_id = evs.user_id
LIMIT 5
) as foo WHERE user_id IN (SELECT count(*) FROM users_table GROUP BY user_id);
DEBUG: push down of limit count: 5
DEBUG: generating subplan 10_1 for subquery SELECT users_table.user_id FROM public.users_table, (SELECT events_table.user_id FROM public.events_table) evs WHERE (users_table.user_id = evs.user_id) LIMIT 5
ERROR: cannot pushdown the subquery
DETAIL: Complex subqueries and CTEs are not allowed in the FROM clause when the query has subqueries in the WHERE clause
-- we don't support recursive subqueries when router executor is disabled
SET citus.enable_router_execution TO false;
SELECT
user_id
FROM
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
DEBUG: push down of limit count: 5
DEBUG: generating subplan 12_1 for subquery SELECT DISTINCT users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.user_id DESC LIMIT 5
ERROR: cannot handle complex subqueries when the router executor is disabled
SET citus.enable_router_execution TO true;
-- window functions are not allowed if they're not partitioned on the distribution column
SELECT
*
FROM
(
SELECT
user_id, time, rnk
FROM
(
SELECT
*, rank() OVER my_win as rnk
FROM
events_table
WINDOW my_win AS (PARTITION BY event_type ORDER BY time DESC)
) as foo
ORDER BY
3 DESC, 1 DESC, 2 DESC
LIMIT
10) as foo;
ERROR: could not run distributed query because the window function that is used cannot be pushed down
HINT: Window functions are supported in two ways. Either add an equality filter on the distributed tables' partition column or use the window functions inside a subquery with a PARTITION BY clause containing the distribution column
-- top level join is not on the distribution key thus not supported
-- (use random to prevent Postgres to pull subqueries)
SELECT
foo.value_2
FROM
(SELECT users_table.value_2, random() FROM users_table, events_table WHERE users_table.user_id = events_table.user_id AND event_type IN (1,2,3,4)) as foo,
(SELECT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.user_id AND event_type IN (5,6,7,8)) as bar
WHERE
foo.value_2 = bar.value_2;
ERROR: cannot pushdown the subquery since all relations are not joined using distribution keys
DETAIL: Each relation should be joined with at least one another relation using distribution keys and equality operator.
-- OUTER JOINs where the outer part is recursively planned and not the other way
-- around is not supported
SELECT
foo.value_2
FROM
(SELECT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.user_id AND event_type IN (1,2,3,4) LIMIT 5) as foo
LEFT JOIN
(SELECT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.user_id AND event_type IN (5,6,7,8)) as bar
ON(foo.value_2 = bar.value_2);
DEBUG: push down of limit count: 5
DEBUG: generating subplan 17_1 for subquery SELECT users_table.value_2 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) LIMIT 5
ERROR: cannot pushdown the subquery
DETAIL: Complex subqueries and CTEs cannot be in the outer part of the outer join
SET client_min_messages TO DEFAULT;
DROP SCHEMA not_supported CASCADE;
NOTICE: drop cascades to table users_table_local
SET search_path TO public;

422
src/test/regress/expected/subquery_and_cte.out Normal file
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-- ===================================================================
-- test recursive planning functionality with subqueries and CTEs
-- ===================================================================
CREATE SCHEMA subquery_and_ctes;
SET search_path TO subquery_and_ctes, public;
CREATE TABLE users_table_local AS SELECT * FROM users_table;
SET client_min_messages TO DEBUG1;
-- CTEs are recursively planned, and subquery foo is also recursively planned
-- final plan becomes a router plan
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT user_id FROM events_table
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT
count(*)
FROM
cte,
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
WHERE foo.user_id = cte.user_id;
DEBUG: generating subplan 2_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_and_ctes.users_table_local), dist_cte AS (SELECT events_table.user_id FROM public.events_table) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id = local_cte.user_id)))
DEBUG: generating subplan 3_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table_local
DEBUG: generating subplan 3_2 for CTE dist_cte: SELECT user_id FROM public.events_table
DEBUG: push down of limit count: 5
DEBUG: generating subplan 2_2 for subquery SELECT DISTINCT users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.user_id DESC LIMIT 5
count
-------
1644
(1 row)
-- CTEs are recursively planned, and subquery foo is also recursively planned
-- final plan becomes a real-time plan since we also have events_table in the
-- range table entries
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT user_id FROM events_table
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT
count(*)
FROM
cte,
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo, events_table
WHERE foo.user_id = cte.user_id AND events_table.user_id = cte.user_id;
DEBUG: generating subplan 6_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_and_ctes.users_table_local), dist_cte AS (SELECT events_table.user_id FROM public.events_table) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id = local_cte.user_id)))
DEBUG: generating subplan 7_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table_local
DEBUG: generating subplan 7_2 for CTE dist_cte: SELECT user_id FROM public.events_table
DEBUG: push down of limit count: 5
DEBUG: generating subplan 6_2 for subquery SELECT DISTINCT users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.user_id DESC LIMIT 5
count
-------
30608
(1 row)
-- CTEs are replaced and subquery in WHERE is also replaced
-- but the query is still real-time query since users_table is in the
-- range table list
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT user_id FROM events_table
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT DISTINCT cte.user_id
FROM users_table, cte
WHERE
users_table.user_id = cte.user_id AND
users_table.user_id IN (SELECT DISTINCT value_2 FROM users_table WHERE value_1 >= 1 AND value_1 <= 20 ORDER BY 1 LIMIT 5)
ORDER BY 1 DESC;
DEBUG: generating subplan 10_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_and_ctes.users_table_local), dist_cte AS (SELECT events_table.user_id FROM public.events_table) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id = local_cte.user_id)))
DEBUG: generating subplan 11_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table_local
DEBUG: generating subplan 11_2 for CTE dist_cte: SELECT user_id FROM public.events_table
DEBUG: push down of limit count: 5
DEBUG: generating subplan 10_2 for subquery SELECT DISTINCT value_2 FROM public.users_table WHERE ((value_1 >= 1) AND (value_1 <= 20)) ORDER BY value_2 LIMIT 5
user_id
---------
4
3
2
1
(4 rows)
-- a very similar query as the above, but this time errors
-- out since we don't support subqueries in WHERE clause
-- when there is only intermediate results on the range table
-- note that this time subquery in WHERE clause is not replaced
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT user_id FROM events_table
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT DISTINCT cte.user_id
FROM cte
WHERE
cte.user_id IN (SELECT DISTINCT user_id FROM users_table WHERE value_1 >= 1 AND value_1 <= 20)
ORDER BY 1 DESC;
DEBUG: generating subplan 14_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_and_ctes.users_table_local), dist_cte AS (SELECT events_table.user_id FROM public.events_table) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id = local_cte.user_id)))
DEBUG: generating subplan 15_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table_local
DEBUG: generating subplan 15_2 for CTE dist_cte: SELECT user_id FROM public.events_table
ERROR: cannot pushdown the subquery
DETAIL: Complex subqueries and CTEs are not allowed in the FROM clause when the query has subqueries in the WHERE clause
-- CTEs inside a subquery and the final query becomes a router
-- query
SELECT
user_id
FROM
(
WITH cte AS (
SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
) SELECT * FROM cte ORDER BY 1 DESC
) as foo;
DEBUG: generating subplan 17_1 for CTE cte: SELECT DISTINCT users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4])))
user_id
---------
6
5
4
3
2
1
(6 rows)
-- CTEs inside a subquery and the final query becomes a
-- real-time query since the other subquery is safe to pushdown
SELECT
bar.user_id
FROM
(
WITH cte AS (
SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
) SELECT * FROM cte ORDER BY 1 DESC
) as foo,
(
SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
) as bar
WHERE foo.user_id = bar.user_id;
DEBUG: generating subplan 19_1 for CTE cte: SELECT DISTINCT users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4])))
user_id
---------
5
1
4
3
6
2
(6 rows)
-- CTEs inside a deeper subquery
-- and also the subquery that contains the CTE is replaced
SELECT
DISTINCT bar.user_id
FROM
(
WITH cte AS (
SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
) SELECT * FROM cte ORDER BY 1 DESC
) as foo,
(
SELECT
users_table.user_id, some_events.event_type
FROM
users_table,
(
WITH cte AS (
SELECT
event_type, users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
value_1 IN (1,2)
) SELECT * FROM cte ORDER BY 1 DESC
) as some_events
WHERE
users_table.user_id = some_events.user_id AND
event_type IN (1,2,3,4)
ORDER BY 2,1
LIMIT 2
) as bar
WHERE foo.user_id = bar.user_id
ORDER BY 1 DESC LIMIT 5;
DEBUG: generating subplan 21_1 for CTE cte: SELECT DISTINCT users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4])))
DEBUG: generating subplan 21_2 for CTE cte: SELECT events_table.event_type, users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (users_table.value_1 = ANY (ARRAY[1, 2])))
DEBUG: push down of limit count: 2
DEBUG: generating subplan 21_3 for subquery SELECT users_table.user_id, some_events.event_type FROM public.users_table, (SELECT cte.event_type, cte.user_id FROM (SELECT intermediate_result.event_type, intermediate_result.user_id FROM read_intermediate_result('21_2'::text, 'binary'::citus_copy_format) intermediate_result(event_type integer, user_id integer)) cte ORDER BY cte.event_type DESC) some_events WHERE ((users_table.user_id = some_events.user_id) AND (some_events.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY some_events.event_type, users_table.user_id LIMIT 2
user_id
---------
1
(1 row)
-- CTEs on the different parts of the query is replaced
-- and subquery foo is also replaced since it contains
-- DISTINCT on a non-partition key
SELECT * FROM
(
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT user_id FROM events_table
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT DISTINCT cte.user_id
FROM users_table, cte
WHERE
users_table.user_id = cte.user_id AND
users_table.user_id IN
(WITH cte_in_where AS (SELECT DISTINCT value_2 FROM users_table WHERE value_1 >= 1 AND value_1 <= 20 ORDER BY 1 LIMIT 5) SELECT * FROM cte_in_where)
ORDER BY 1 DESC
) as foo,
events_table
WHERE
foo.user_id = events_table.value_2
ORDER BY 3 DESC, 2 DESC, 1 DESC
LIMIT 5;
DEBUG: generating subplan 25_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_and_ctes.users_table_local), dist_cte AS (SELECT events_table.user_id FROM public.events_table) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id = local_cte.user_id)))
DEBUG: generating subplan 26_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table_local
DEBUG: generating subplan 26_2 for CTE dist_cte: SELECT user_id FROM public.events_table
DEBUG: generating subplan 25_2 for CTE cte_in_where: SELECT DISTINCT value_2 FROM public.users_table WHERE ((value_1 >= 1) AND (value_1 <= 20)) ORDER BY value_2 LIMIT 5
DEBUG: push down of limit count: 5
DEBUG: generating subplan 25_3 for subquery SELECT DISTINCT cte.user_id FROM public.users_table, (SELECT intermediate_result.user_id FROM read_intermediate_result('25_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) cte WHERE ((users_table.user_id = cte.user_id) AND (users_table.user_id IN (SELECT cte_in_where.value_2 FROM (SELECT intermediate_result.value_2 FROM read_intermediate_result('25_2'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) cte_in_where))) ORDER BY cte.user_id DESC
DEBUG: push down of limit count: 5
user_id | user_id | time | event_type | value_2 | value_3 | value_4
---------+---------+---------------------------------+------------+---------+---------+---------
4 | 1 | Thu Nov 23 21:54:46.924477 2017 | 6 | 4 | 5 |
2 | 4 | Thu Nov 23 18:10:21.338399 2017 | 1 | 2 | 4 |
4 | 3 | Thu Nov 23 18:08:26.550729 2017 | 2 | 4 | 3 |
2 | 3 | Thu Nov 23 16:44:41.903713 2017 | 4 | 2 | 2 |
1 | 3 | Thu Nov 23 16:31:56.219594 2017 | 5 | 1 | 2 |
(5 rows)
-- now recursively plan subqueries inside the CTEs that contains LIMIT and OFFSET
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT
user_id
FROM
events_table,
(SELECT DISTINCT value_2 FROM users_table OFFSET 0) as foo
WHERE
events_table.user_id = foo.value_2 AND
events_table.user_id IN (SELECT DISTINCT value_1 FROM users_table ORDER BY 1 LIMIT 3)
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT
count(*)
FROM
cte,
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
WHERE foo.user_id = cte.user_id;
DEBUG: generating subplan 30_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_and_ctes.users_table_local), dist_cte AS (SELECT events_table.user_id FROM public.events_table, (SELECT DISTINCT users_table.value_2 FROM public.users_table OFFSET 0) foo WHERE ((events_table.user_id = foo.value_2) AND (events_table.user_id IN (SELECT DISTINCT users_table.value_1 FROM public.users_table ORDER BY users_table.value_1 LIMIT 3)))) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id = local_cte.user_id)))
DEBUG: generating subplan 31_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table_local
DEBUG: generating subplan 31_2 for CTE dist_cte: SELECT events_table.user_id FROM public.events_table, (SELECT DISTINCT users_table.value_2 FROM public.users_table OFFSET 0) foo WHERE ((events_table.user_id = foo.value_2) AND (events_table.user_id IN (SELECT DISTINCT users_table.value_1 FROM public.users_table ORDER BY users_table.value_1 LIMIT 3)))
DEBUG: push down of limit count: 3
DEBUG: generating subplan 32_1 for subquery SELECT DISTINCT value_1 FROM public.users_table ORDER BY value_1 LIMIT 3
DEBUG: generating subplan 32_2 for subquery SELECT DISTINCT value_2 FROM public.users_table OFFSET 0
DEBUG: push down of limit count: 5
DEBUG: generating subplan 30_2 for subquery SELECT DISTINCT users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.user_id DESC LIMIT 5
count
-------
432
(1 row)
-- the same query, but this time the CTEs also live inside a subquery
SELECT
*
FROM
(
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT
user_id
FROM
events_table,
(SELECT DISTINCT value_2 FROM users_table OFFSET 0) as foo
WHERE
events_table.user_id = foo.value_2 AND
events_table.user_id IN (SELECT DISTINCT value_1 FROM users_table ORDER BY 1 LIMIT 3)
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT
count(*) as cnt
FROM
cte,
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
WHERE foo.user_id = cte.user_id
) as foo, users_table WHERE foo.cnt > users_table.value_2
ORDER BY 3 DESC, 1 DESC, 2 DESC, 4 DESC
LIMIT 5;
DEBUG: generating subplan 36_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_and_ctes.users_table_local), dist_cte AS (SELECT events_table.user_id FROM public.events_table, (SELECT DISTINCT users_table.value_2 FROM public.users_table OFFSET 0) foo WHERE ((events_table.user_id = foo.value_2) AND (events_table.user_id IN (SELECT DISTINCT users_table.value_1 FROM public.users_table ORDER BY users_table.value_1 LIMIT 3)))) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id = local_cte.user_id)))
DEBUG: generating subplan 37_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table_local
DEBUG: generating subplan 37_2 for CTE dist_cte: SELECT events_table.user_id FROM public.events_table, (SELECT DISTINCT users_table.value_2 FROM public.users_table OFFSET 0) foo WHERE ((events_table.user_id = foo.value_2) AND (events_table.user_id IN (SELECT DISTINCT users_table.value_1 FROM public.users_table ORDER BY users_table.value_1 LIMIT 3)))
DEBUG: push down of limit count: 3
DEBUG: generating subplan 38_1 for subquery SELECT DISTINCT value_1 FROM public.users_table ORDER BY value_1 LIMIT 3
DEBUG: generating subplan 38_2 for subquery SELECT DISTINCT value_2 FROM public.users_table OFFSET 0
DEBUG: push down of limit count: 5
DEBUG: generating subplan 36_2 for subquery SELECT DISTINCT users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.user_id DESC LIMIT 5
DEBUG: generating subplan 36_3 for subquery SELECT count(*) AS cnt FROM (SELECT intermediate_result.user_id FROM read_intermediate_result('36_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) cte, (SELECT intermediate_result.user_id FROM read_intermediate_result('36_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) foo WHERE (foo.user_id = cte.user_id)
DEBUG: push down of limit count: 5
cnt | user_id | time | value_1 | value_2 | value_3 | value_4
-----+---------+---------------------------------+---------+---------+---------+---------
432 | 1 | Thu Nov 23 17:30:34.635085 2017 | 3 | 4 | 4 |
432 | 1 | Thu Nov 23 17:23:03.441394 2017 | 5 | 4 | 3 |
432 | 3 | Thu Nov 23 17:18:51.048758 2017 | 1 | 5 | 5 |
432 | 3 | Thu Nov 23 17:10:35.959913 2017 | 4 | 3 | 1 |
432 | 5 | Thu Nov 23 16:48:32.08896 2017 | 5 | 2 | 1 |
(5 rows)
-- recursive CTES are not supported inside subqueries as well
SELECT
bar.user_id
FROM
(
WITH RECURSIVE cte AS (
SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
) SELECT * FROM cte ORDER BY 1 DESC
) as foo,
(
SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
) as bar
WHERE foo.user_id = bar.user_id;
ERROR: recursive CTEs are not supported in distributed queries
SET client_min_messages TO DEFAULT;
DROP SCHEMA subquery_and_ctes CASCADE;
NOTICE: drop cascades to table users_table_local
SET search_path TO public;

347
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@ -0,0 +1,347 @@
-- ===================================================================
-- test recursive planning functionality
-- ===================================================================
SET client_min_messages TO DEBUG1;
-- subqueries in FROM clause with LIMIT should be recursively planned
SELECT
user_id
FROM
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
DEBUG: push down of limit count: 5
DEBUG: generating subplan 1_1 for subquery SELECT DISTINCT users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.user_id DESC LIMIT 5
user_id
---------
6
5
4
3
2
(5 rows)
-- subqueries in FROM clause with DISTINCT on non-partition key
-- should be recursively planned
SELECT
*
FROM
(SELECT
DISTINCT users_table.value_1
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1
) as foo
ORDER BY 1 DESC;
DEBUG: generating subplan 3_1 for subquery SELECT DISTINCT users_table.value_1 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.value_1
value_1
---------
5
4
3
2
1
0
(6 rows)
-- subqueries in FROM clause with GROUP BY on non-partition key
-- should be recursively planned
SELECT
*
FROM
(SELECT
users_table.value_2, avg(value_1)
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
GROUP BY users_table.value_2
ORDER BY 1 DESC
) as foo
ORDER BY 2 DESC, 1;
DEBUG: generating subplan 5_1 for subquery SELECT users_table.value_2, avg(users_table.value_1) AS avg FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) GROUP BY users_table.value_2 ORDER BY users_table.value_2 DESC
value_2 | avg
---------+--------------------
4 | 2.8453608247422680
2 | 2.6833855799373041
5 | 2.6238938053097345
1 | 2.3569131832797428
3 | 2.3424124513618677
0 | 2.0940170940170940
(6 rows)
-- multiple subqueries in FROM clause should be replaced
-- and the final query is router query
SELECT
*
FROM
(SELECT
users_table.value_2
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
GROUP BY users_table.value_2
ORDER BY 1 DESC
) as foo,
(SELECT
users_table.value_3
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
GROUP BY users_table.value_3
ORDER BY 1 DESC
) as bar
WHERE foo.value_2 = bar.value_3
ORDER BY 2 DESC, 1;
DEBUG: generating subplan 7_1 for subquery SELECT users_table.value_2 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) GROUP BY users_table.value_2 ORDER BY users_table.value_2 DESC
DEBUG: generating subplan 7_2 for subquery SELECT users_table.value_3 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[5, 6, 7, 8]))) GROUP BY users_table.value_3 ORDER BY users_table.value_3 DESC
value_2 | value_3
---------+---------
5 | 5
4 | 4
3 | 3
2 | 2
1 | 1
0 | 0
(6 rows)
-- same query with alias in the subquery
SELECT
DISTINCT ON (citus) citus, postgres, citus + 1 as c1, postgres-1 as p1
FROM
(SELECT
users_table.value_2
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
GROUP BY users_table.value_2
ORDER BY 1 DESC
) as foo(postgres),
(SELECT
users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
ORDER BY 1 DESC
) as bar (citus)
WHERE foo.postgres = bar.citus
ORDER BY 1 DESC, 2 DESC
LIMIT 3;
DEBUG: generating subplan 10_1 for subquery SELECT users_table.value_2 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) GROUP BY users_table.value_2 ORDER BY users_table.value_2 DESC
DEBUG: push down of limit count: 3
citus | postgres | c1 | p1
-------+----------+----+----
5 | 5 | 6 | 4
4 | 4 | 5 | 3
3 | 3 | 4 | 2
(3 rows)
-- foo is replaced
-- and the final query is real-time
SELECT
*
FROM
(SELECT
users_table.value_2
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
GROUP BY users_table.value_2
ORDER BY 1 DESC
) as foo,
(SELECT
users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
ORDER BY 1 DESC
) as bar
WHERE foo.value_2 = bar.user_id
ORDER BY 2 DESC, 1 DESC
LIMIT 3;
DEBUG: generating subplan 12_1 for subquery SELECT users_table.value_2 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) GROUP BY users_table.value_2 ORDER BY users_table.value_2 DESC
DEBUG: push down of limit count: 3
value_2 | user_id
---------+---------
5 | 5
5 | 5
5 | 5
(3 rows)
-- subqueries in WHERE should be replaced
SELECT DISTINCT user_id
FROM users_table
WHERE
user_id IN (SELECT DISTINCT value_2 FROM users_table WHERE value_1 >= 1 AND value_1 <= 20 ORDER BY 1 LIMIT 5)
ORDER BY 1 DESC;
DEBUG: push down of limit count: 5
DEBUG: generating subplan 14_1 for subquery SELECT DISTINCT value_2 FROM public.users_table WHERE ((value_1 >= 1) AND (value_1 <= 20)) ORDER BY value_2 LIMIT 5
user_id
---------
4
3
2
1
(4 rows)
-- subquery in FROM -> FROM -> FROM should be replaced due to OFFSET
SELECT
DISTINCT user_id
FROM
(
SELECT users_table.user_id FROM users_table,
(
SELECT
event_type, user_id
FROM
(SELECT event_type, users_table.user_id FROM users_table,
(SELECT user_id, event_type FROM events_table WHERE value_2 < 3 OFFSET 3) as foo
WHERE foo.user_id = users_table.user_id
) bar
) as baz
WHERE baz.user_id = users_table.user_id
) as sub1
ORDER BY 1 DESC
LIMIT 3;
DEBUG: generating subplan 16_1 for subquery SELECT user_id, event_type FROM public.events_table WHERE (value_2 < 3) OFFSET 3
DEBUG: push down of limit count: 3
user_id
---------
6
5
4
(3 rows)
-- subquery in FROM -> FROM -> WHERE should be replaced due to LIMIT
SELECT user_id, array_length(events_table, 1)
FROM (
SELECT user_id, array_agg(event ORDER BY time) AS events_table
FROM (
SELECT
u.user_id, e.event_type::text AS event, e.time
FROM
users_table AS u,
events_table AS e
WHERE u.user_id = e.user_id AND
u.user_id IN
(
SELECT
user_id
FROM
users_table
WHERE value_2 >= 5
AND EXISTS (SELECT user_id FROM events_table WHERE event_type > 1 AND event_type <= 3 AND value_3 > 1 AND user_id = users_table.user_id)
AND NOT EXISTS (SELECT user_id FROM events_table WHERE event_type > 3 AND event_type <= 4 AND value_3 > 1 AND user_id = users_table.user_id)
LIMIT 5
)
) t
GROUP BY user_id
) q
ORDER BY 2 DESC, 1;
DEBUG: push down of limit count: 5
DEBUG: generating subplan 18_1 for subquery SELECT user_id FROM public.users_table WHERE ((value_2 >= 5) AND (EXISTS (SELECT events_table.user_id FROM public.events_table WHERE ((events_table.event_type > 1) AND (events_table.event_type <= 3) AND (events_table.value_3 > (1)::double precision) AND (events_table.user_id = users_table.user_id)))) AND (NOT (EXISTS (SELECT events_table.user_id FROM public.events_table WHERE ((events_table.event_type > 3) AND (events_table.event_type <= 4) AND (events_table.value_3 > (1)::double precision) AND (events_table.user_id = users_table.user_id)))))) LIMIT 5
user_id | array_length
---------+--------------
5 | 364
(1 row)
-- subquery (i.e., subquery_2) in WHERE->FROM should be replaced due to LIMIT
SELECT
user_id
FROM
users_table
WHERE
user_id IN
(
SELECT
user_id
FROM (
SELECT
subquery_1.user_id, count_pay
FROM
(
(SELECT
users_table.user_id,
'action=>1' AS event,
events_table.time
FROM
users_table,
events_table
WHERE
users_table.user_id = events_table.user_id AND
users_table.user_id >= 1 AND
users_table.user_id <= 3 AND
events_table.event_type > 1 AND events_table.event_type < 3
)
UNION
(SELECT
users_table.user_id,
'action=>2' AS event,
events_table.time
FROM
users_table,
events_table
WHERE
users_table.user_id = events_table.user_id AND
users_table.user_id >= 1 AND
users_table.user_id <= 3 AND
events_table.event_type > 2 AND events_table.event_type < 4
)
) AS subquery_1
LEFT JOIN
(SELECT
user_id,
COUNT(*) AS count_pay
FROM
users_table
WHERE
user_id >= 1 AND
user_id <= 3 AND
users_table.value_1 > 3 AND users_table.value_1 < 5
GROUP BY
user_id
HAVING
COUNT(*) > 1
LIMIT 10
) AS subquery_2
ON
subquery_1.user_id = subquery_2.user_id
GROUP BY
subquery_1.user_id,
count_pay) AS subquery_top
GROUP BY
count_pay, user_id
)
GROUP BY user_id
HAVING count(*) > 1 AND sum(value_2) > 29
ORDER BY 1;
DEBUG: push down of limit count: 10
DEBUG: generating subplan 20_1 for subquery SELECT user_id, count(*) AS count_pay FROM public.users_table WHERE ((user_id >= 1) AND (user_id <= 3) AND (value_1 > 3) AND (value_1 < 5)) GROUP BY user_id HAVING (count(*) > 1) LIMIT 10
user_id
---------
2
3
(2 rows)

143
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@ -0,0 +1,143 @@
-- ===================================================================
-- test recursive planning functionality with different executors
-- ===================================================================
CREATE SCHEMA subquery_executor;
SET search_path TO subquery_executor, public;
CREATE TABLE users_table_local AS SELECT * FROM users_table;
SET client_min_messages TO DEBUG1;
-- subquery with router planner
SELECT
count(*)
FROM
(
SELECT value_2 FROM users_table WHERE user_id = 15 OFFSET 0
) as foo,
(
SELECT user_id FROM users_table
) as bar
WHERE foo.value_2 = bar.user_id;
DEBUG: generating subplan 2_1 for subquery SELECT value_2 FROM public.users_table WHERE (user_id = 15) OFFSET 0
count
-------
0
(1 row)
-- subquery with router but not logical plannable
-- should fail
SELECT
count(*)
FROM
(
SELECT user_id, sum(value_2) over (partition by user_id) AS counter FROM users_table WHERE user_id = 15
) as foo,
(
SELECT user_id FROM users_table
) as bar
WHERE foo.counter = bar.user_id;
ERROR: cannot pushdown the subquery since all relations are not joined using distribution keys
DETAIL: Each relation should be joined with at least one another relation using distribution keys and equality operator.
-- subquery with real-time query
SELECT
count(*)
FROM
(
SELECT value_2 FROM users_table WHERE user_id != 15 OFFSET 0
) as foo,
(
SELECT user_id FROM users_table
) as bar
WHERE foo.value_2 = bar.user_id;
DEBUG: generating subplan 5_1 for subquery SELECT value_2 FROM public.users_table WHERE (user_id <> 15) OFFSET 0
count
-------
1612
(1 row)
-- subquery with repartition query
SET citus.enable_repartition_joins to ON;
SELECT
count(*)
FROM
(
SELECT DISTINCT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.value_2 AND users_table.user_id < 2
) as foo,
(
SELECT user_id FROM users_table
) as bar
WHERE foo.value_2 = bar.user_id;
DEBUG: cannot use real time executor with repartition jobs
HINT: Since you enabled citus.enable_repartition_joins Citus chose to use task-tracker.
DEBUG: generating subplan 7_1 for subquery SELECT DISTINCT users_table.value_2 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.value_2) AND (users_table.user_id < 2))
count
-------
58
(1 row)
-- mixed of all executors (including local execution)
SELECT
count(*)
FROM
(
SELECT value_2 FROM users_table WHERE user_id = 15 OFFSET 0
) as foo,
(
SELECT user_id FROM users_table OFFSET 0
) as bar,
(
SELECT DISTINCT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.value_2 AND users_table.user_id < 2
) baz,
(
SELECT user_id FROM users_table_local WHERE user_id = 2
) baw
WHERE foo.value_2 = bar.user_id AND baz.value_2 = bar.user_id AND bar.user_id = baw.user_id;
DEBUG: generating subplan 9_1 for subquery SELECT value_2 FROM public.users_table WHERE (user_id = 15) OFFSET 0
DEBUG: generating subplan 9_2 for subquery SELECT user_id FROM public.users_table OFFSET 0
DEBUG: cannot use real time executor with repartition jobs
HINT: Since you enabled citus.enable_repartition_joins Citus chose to use task-tracker.
DEBUG: generating subplan 9_3 for subquery SELECT DISTINCT users_table.value_2 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.value_2) AND (users_table.user_id < 2))
DEBUG: generating subplan 9_4 for subquery SELECT user_id FROM subquery_executor.users_table_local WHERE (user_id = 2)
count
-------
0
(1 row)
SET citus.enable_repartition_joins to OFF;
-- final query is router
SELECT
count(*)
FROM
(
SELECT value_2 FROM users_table WHERE user_id = 1 OFFSET 0
) as foo,
(
SELECT user_id FROM users_table WHERE user_id = 2 OFFSET 0
) as bar
WHERE foo.value_2 = bar.user_id;
DEBUG: generating subplan 13_1 for subquery SELECT value_2 FROM public.users_table WHERE (user_id = 1) OFFSET 0
DEBUG: generating subplan 13_2 for subquery SELECT user_id FROM public.users_table WHERE (user_id = 2) OFFSET 0
count
-------
18
(1 row)
-- final query is real-time
SELECT
count(*)
FROM
(
SELECT value_2 FROM users_table WHERE user_id = 1 OFFSET 0
) as foo,
(
SELECT user_id FROM users_table WHERE user_id != 2
) as bar
WHERE foo.value_2 = bar.user_id;
DEBUG: generating subplan 16_1 for subquery SELECT value_2 FROM public.users_table WHERE (user_id = 1) OFFSET 0
count
-------
103
(1 row)
SET client_min_messages TO DEFAULT;
DROP SCHEMA subquery_executor CASCADE;
NOTICE: drop cascades to table users_table_local
SET search_path TO public;

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-- ===================================================================
-- test recursive planning functionality on local tables
-- ===================================================================
CREATE SCHEMA subquery_local_tables;
SET search_path TO subquery_local_tables, public;
CREATE TABLE users_table_local AS SELECT * FROM users_table;
CREATE TABLE events_table_local AS SELECT * FROM events_table;
SET client_min_messages TO DEBUG1;
-- foo is only on the local tables, thus can be replaced
-- bar is on the distributed tables with LIMIT, should be replaced
SELECT
foo.user_id
FROM
(SELECT
DISTINCT users_table_local.user_id
FROM
users_table_local, events_table_local
WHERE
users_table_local.user_id = events_table_local.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo,
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
ORDER BY 1 DESC LIMIT 5
) as bar
WHERE bar.user_id = foo.user_id
ORDER BY 1 DESC;
DEBUG: generating subplan 3_1 for subquery SELECT DISTINCT users_table_local.user_id FROM subquery_local_tables.users_table_local, subquery_local_tables.events_table_local WHERE ((users_table_local.user_id = events_table_local.user_id) AND (events_table_local.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table_local.user_id DESC LIMIT 5
DEBUG: push down of limit count: 5
DEBUG: generating subplan 3_2 for subquery SELECT DISTINCT users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[5, 6, 7, 8]))) ORDER BY users_table.user_id DESC LIMIT 5
user_id
---------
6
5
4
3
2
(5 rows)
-- foo is only on the local tables, thus can be replaced
SELECT
foo.user_id
FROM
(SELECT
DISTINCT users_table_local.user_id
FROM
users_table_local, events_table_local
WHERE
users_table_local.user_id = events_table_local.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo,
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
) as bar
WHERE bar.user_id = foo.user_id
ORDER BY 1 DESC;
DEBUG: generating subplan 5_1 for subquery SELECT DISTINCT users_table_local.user_id FROM subquery_local_tables.users_table_local, subquery_local_tables.events_table_local WHERE ((users_table_local.user_id = events_table_local.user_id) AND (events_table_local.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table_local.user_id DESC LIMIT 5
user_id
---------
6
5
4
3
2
(5 rows)
-- subqueries in WHERE could be replaced even if they are on the local tables
SELECT DISTINCT user_id
FROM users_table
WHERE
user_id IN (SELECT DISTINCT value_2 FROM users_table_local WHERE value_1 = 1)
ORDER BY 1 LIMIT 5;
DEBUG: generating subplan 6_1 for subquery SELECT DISTINCT value_2 FROM subquery_local_tables.users_table_local WHERE (value_1 = 1)
DEBUG: push down of limit count: 5
user_id
---------
1
2
3
4
5
(5 rows)
-- subquery in FROM -> FROM -> FROM should be replaced if
-- it contains onle local tables
SELECT
DISTINCT user_id
FROM
(
SELECT users_table.user_id FROM users_table,
(
SELECT
event_type, user_id
FROM
(SELECT event_type, users_table.user_id FROM users_table,
(SELECT user_id, event_type FROM events_table_local WHERE value_2 < 3 OFFSET 3) as foo
WHERE foo.user_id = users_table.user_id
) bar
) as baz
WHERE baz.user_id = users_table.user_id
) as sub1
ORDER BY 1 DESC
LIMIT 3;
DEBUG: generating subplan 7_1 for subquery SELECT user_id, event_type FROM subquery_local_tables.events_table_local WHERE (value_2 < 3) OFFSET 3
DEBUG: push down of limit count: 3
user_id
---------
6
5
4
(3 rows)
-- subquery in FROM -> FROM -> WHERE -> WHERE should be replaced if
-- it contains onle local tables
-- Later the upper level query is also recursively planned due to LIMIT
SELECT user_id, array_length(events_table, 1)
FROM (
SELECT user_id, array_agg(event ORDER BY time) AS events_table
FROM (
SELECT
u.user_id, e.event_type::text AS event, e.time
FROM
users_table AS u,
events_table AS e
WHERE u.user_id = e.user_id AND
u.user_id IN
(
SELECT
user_id
FROM
users_table
WHERE value_2 >= 5
AND EXISTS (SELECT user_id FROM events_table_local WHERE event_type > 1 AND event_type <= 3 AND value_3 > 1)
AND NOT EXISTS (SELECT user_id FROM events_table WHERE event_type > 3 AND event_type <= 4 AND value_3 > 1 AND user_id = users_table.user_id)
LIMIT 5
)
) t
GROUP BY user_id
) q
ORDER BY 2 DESC, 1;
DEBUG: generating subplan 8_1 for subquery SELECT user_id FROM subquery_local_tables.events_table_local WHERE ((event_type > 1) AND (event_type <= 3) AND (value_3 > (1)::double precision))
DEBUG: push down of limit count: 5
DEBUG: generating subplan 8_2 for subquery SELECT user_id FROM public.users_table WHERE ((value_2 >= 5) AND (EXISTS (SELECT intermediate_result.user_id FROM read_intermediate_result('8_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer))) AND (NOT (EXISTS (SELECT events_table.user_id FROM public.events_table WHERE ((events_table.event_type > 3) AND (events_table.event_type <= 4) AND (events_table.value_3 > (1)::double precision) AND (events_table.user_id = users_table.user_id)))))) LIMIT 5
user_id | array_length
---------+--------------
5 | 364
(1 row)
-- subquery (i.e., subquery_2) in WHERE->FROM should be replaced due to local tables
SELECT
user_id
FROM
users_table
WHERE
user_id IN
(
SELECT
user_id
FROM (
SELECT
subquery_1.user_id, count_pay
FROM
(
(SELECT
users_table.user_id,
'action=>1' AS event,
events_table.time
FROM
users_table,
events_table
WHERE
users_table.user_id = events_table.user_id AND
users_table.user_id >= 1 AND
users_table.user_id <= 3 AND
events_table.event_type > 1 AND events_table.event_type < 3
)
UNION
(SELECT
users_table.user_id,
'action=>2' AS event,
events_table.time
FROM
users_table,
events_table
WHERE
users_table.user_id = events_table.user_id AND
users_table.user_id >= 1 AND
users_table.user_id <= 3 AND
events_table.event_type > 2 AND events_table.event_type < 4
)
) AS subquery_1
LEFT JOIN
(SELECT
user_id,
COUNT(*) AS count_pay
FROM
users_table_local
WHERE
user_id >= 1 AND
user_id <= 3 AND
users_table_local.value_1 > 3 AND users_table_local.value_1 < 5
GROUP BY
user_id
HAVING
COUNT(*) > 1
LIMIT 10
) AS subquery_2
ON
subquery_1.user_id = subquery_2.user_id
GROUP BY
subquery_1.user_id,
count_pay) AS subquery_top
GROUP BY
count_pay, user_id
)
GROUP BY user_id
HAVING count(*) > 1 AND sum(value_2) > 29
ORDER BY 1;
DEBUG: generating subplan 10_1 for subquery SELECT user_id, count(*) AS count_pay FROM subquery_local_tables.users_table_local WHERE ((user_id >= 1) AND (user_id <= 3) AND (value_1 > 3) AND (value_1 < 5)) GROUP BY user_id HAVING (count(*) > 1) LIMIT 10
user_id
---------
2
3
(2 rows)
SET client_min_messages TO DEFAULT;
DROP SCHEMA subquery_local_tables CASCADE;
NOTICE: drop cascades to 2 other objects
DETAIL: drop cascades to table users_table_local
drop cascades to table events_table_local
SET search_path TO public;

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-- ===================================================================
-- test recursive planning functionality on partitioned tables
-- ===================================================================
CREATE SCHEMA subquery_and_partitioning;
SET search_path TO subquery_and_partitioning, public;
CREATE TABLE users_table_local AS SELECT * FROM users_table;
CREATE TABLE events_table_local AS SELECT * FROM events_table;
CREATE TABLE partitioning_test(id int, value_1 int, time date) PARTITION BY RANGE (time);
-- create its partitions
CREATE TABLE partitioning_test_2017 PARTITION OF partitioning_test FOR VALUES FROM ('2017-01-01') TO ('2018-01-01');
CREATE TABLE partitioning_test_2010 PARTITION OF partitioning_test FOR VALUES FROM ('2010-01-01') TO ('2011-01-01');
-- load some data and distribute tables
INSERT INTO partitioning_test VALUES (1, 1, '2017-11-23');
INSERT INTO partitioning_test VALUES (2, 1, '2010-07-07');
INSERT INTO partitioning_test_2017 VALUES (3, 3, '2017-11-22');
INSERT INTO partitioning_test_2010 VALUES (4, 4, '2010-03-03');
-- distribute partitioned table
SET citus.shard_replication_factor TO 1;
SELECT create_distributed_table('partitioning_test', 'id');
NOTICE: Copying data from local table...
NOTICE: Copying data from local table...
create_distributed_table
--------------------------
(1 row)
SET client_min_messages TO DEBUG1;
-- subplan for partitioned tables
SELECT
id
FROM
(SELECT
DISTINCT partitioning_test.id
FROM
partitioning_test
LIMIT 5
) as foo
ORDER BY 1 DESC;
DEBUG: push down of limit count: 5
DEBUG: generating subplan 3_1 for subquery SELECT DISTINCT id FROM subquery_and_partitioning.partitioning_test LIMIT 5
id
----
4
3
2
1
(4 rows)
-- final query is router on partitioned tables
SELECT
*
FROM
(SELECT
DISTINCT partitioning_test.id
FROM
partitioning_test
LIMIT 5
) as foo,
(SELECT
DISTINCT partitioning_test.time
FROM
partitioning_test
LIMIT 5
) as bar
WHERE foo.id = date_part('day', bar.time)
ORDER BY 2 DESC, 1;
DEBUG: push down of limit count: 5
DEBUG: generating subplan 5_1 for subquery SELECT DISTINCT id FROM subquery_and_partitioning.partitioning_test LIMIT 5
DEBUG: push down of limit count: 5
DEBUG: generating subplan 5_2 for subquery SELECT DISTINCT "time" FROM subquery_and_partitioning.partitioning_test LIMIT 5
id | time
----+------------
3 | 03-03-2010
(1 row)
-- final query is real-time
SELECT
*
FROM
(SELECT
DISTINCT partitioning_test.time
FROM
partitioning_test
ORDER BY 1 DESC
LIMIT 5
) as foo,
(
SELECT
DISTINCT partitioning_test.id
FROM
partitioning_test
) as bar
WHERE date_part('day', foo.time) = bar.id
ORDER BY 2 DESC, 1 DESC
LIMIT 3;
DEBUG: push down of limit count: 5
DEBUG: generating subplan 8_1 for subquery SELECT DISTINCT "time" FROM subquery_and_partitioning.partitioning_test ORDER BY "time" DESC LIMIT 5
DEBUG: push down of limit count: 3
time | id
------------+----
03-03-2010 | 3
(1 row)
-- final query is real-time that is joined with partitioned table
SELECT
*
FROM
(SELECT
DISTINCT partitioning_test.time
FROM
partitioning_test
ORDER BY 1 DESC
LIMIT 5
) as foo,
(
SELECT
DISTINCT partitioning_test.id
FROM
partitioning_test
) as bar,
partitioning_test
WHERE date_part('day', foo.time) = bar.id AND partitioning_test.id = bar.id
ORDER BY 2 DESC, 1 DESC
LIMIT 3;
DEBUG: push down of limit count: 5
DEBUG: generating subplan 10_1 for subquery SELECT DISTINCT "time" FROM subquery_and_partitioning.partitioning_test ORDER BY "time" DESC LIMIT 5
DEBUG: push down of limit count: 3
time | id | id | value_1 | time
------------+----+----+---------+------------
03-03-2010 | 3 | 3 | 3 | 11-22-2017
(1 row)
-- subquery in WHERE clause
SELECT DISTINCT id
FROM partitioning_test
WHERE
id IN (SELECT DISTINCT date_part('day', time) FROM partitioning_test);
DEBUG: generating subplan 12_1 for subquery SELECT DISTINCT date_part('day'::text, "time") AS date_part FROM subquery_and_partitioning.partitioning_test
id
----
3
(1 row)
-- repartition subquery
SET citus.enable_repartition_joins to ON;
SELECT
count(*)
FROM
(
SELECT DISTINCT p1.value_1 FROM partitioning_test as p1, partitioning_test as p2 WHERE p1.id = p2.value_1
) as foo,
(
SELECT user_id FROM users_table
) as bar
WHERE foo.value_1 = bar.user_id;
DEBUG: cannot use real time executor with repartition jobs
HINT: Since you enabled citus.enable_repartition_joins Citus chose to use task-tracker.
DEBUG: generating subplan 14_1 for subquery SELECT DISTINCT p1.value_1 FROM subquery_and_partitioning.partitioning_test p1, subquery_and_partitioning.partitioning_test p2 WHERE (p1.id = p2.value_1)
count
-------
47
(1 row)
SET citus.enable_repartition_joins to OFF;
-- subquery, cte, view and non-partitioned tables
CREATE VIEW subquery_and_ctes AS
SELECT
*
FROM
(
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT
user_id
FROM
events_table,
(SELECT DISTINCT value_1 FROM partitioning_test OFFSET 0) as foo
WHERE
events_table.user_id = foo.value_1 AND
events_table.user_id IN (SELECT DISTINCT value_1 FROM users_table ORDER BY 1 LIMIT 3)
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT
count(*) as cnt
FROM
cte,
(SELECT
DISTINCT events_table.user_id
FROM
partitioning_test, events_table
WHERE
events_table.user_id = partitioning_test.id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
WHERE foo.user_id = cte.user_id
) as foo, users_table WHERE foo.cnt > users_table.value_2;
SELECT * FROM subquery_and_ctes
ORDER BY 3 DESC, 1 DESC, 2 DESC, 4 DESC
LIMIT 5;
DEBUG: generating subplan 16_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_and_partitioning.users_table_local), dist_cte AS (SELECT events_table.user_id FROM public.events_table, (SELECT DISTINCT partitioning_test.value_1 FROM subquery_and_partitioning.partitioning_test OFFSET 0) foo WHERE ((events_table.user_id = foo.value_1) AND (events_table.user_id IN (SELECT DISTINCT users_table.value_1 FROM public.users_table ORDER BY users_table.value_1 LIMIT 3)))) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id = local_cte.user_id)))
DEBUG: generating subplan 17_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_partitioning.users_table_local
DEBUG: generating subplan 17_2 for CTE dist_cte: SELECT events_table.user_id FROM public.events_table, (SELECT DISTINCT partitioning_test.value_1 FROM subquery_and_partitioning.partitioning_test OFFSET 0) foo WHERE ((events_table.user_id = foo.value_1) AND (events_table.user_id IN (SELECT DISTINCT users_table.value_1 FROM public.users_table ORDER BY users_table.value_1 LIMIT 3)))
DEBUG: push down of limit count: 3
DEBUG: generating subplan 18_1 for subquery SELECT DISTINCT value_1 FROM public.users_table ORDER BY value_1 LIMIT 3
DEBUG: generating subplan 18_2 for subquery SELECT DISTINCT value_1 FROM subquery_and_partitioning.partitioning_test OFFSET 0
DEBUG: push down of limit count: 5
DEBUG: generating subplan 16_2 for subquery SELECT DISTINCT events_table.user_id FROM subquery_and_partitioning.partitioning_test, public.events_table WHERE ((events_table.user_id = partitioning_test.id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY events_table.user_id DESC LIMIT 5
DEBUG: generating subplan 16_3 for subquery SELECT count(*) AS cnt FROM (SELECT intermediate_result.user_id FROM read_intermediate_result('16_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) cte, (SELECT intermediate_result.user_id FROM read_intermediate_result('16_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) foo WHERE (foo.user_id = cte.user_id)
DEBUG: push down of limit count: 5
cnt | user_id | time | value_1 | value_2 | value_3 | value_4
-----+---------+---------------------------------+---------+---------+---------+---------
105 | 1 | Thu Nov 23 17:30:34.635085 2017 | 3 | 4 | 4 |
105 | 1 | Thu Nov 23 17:23:03.441394 2017 | 5 | 4 | 3 |
105 | 3 | Thu Nov 23 17:18:51.048758 2017 | 1 | 5 | 5 |
105 | 3 | Thu Nov 23 17:10:35.959913 2017 | 4 | 3 | 1 |
105 | 5 | Thu Nov 23 16:48:32.08896 2017 | 5 | 2 | 1 |
(5 rows)
-- deep subquery, partitioned and non-partitioned tables together
SELECT count(*)
FROM
(
SELECT avg(min) FROM
(
SELECT min(partitioning_test.value_1) FROM
(
SELECT avg(event_type) as avg_ev_type FROM
(
SELECT
max(value_1) as mx_val_1
FROM (
SELECT
avg(event_type) as avg
FROM
(
SELECT
cnt
FROM
(SELECT count(*) as cnt, value_1 FROM partitioning_test GROUP BY value_1) as level_1, users_table
WHERE
users_table.user_id = level_1.cnt
) as level_2, events_table
WHERE events_table.user_id = level_2.cnt
GROUP BY level_2.cnt
) as level_3, users_table
WHERE user_id = level_3.avg
GROUP BY level_3.avg
) as level_4, events_table
WHERE level_4.mx_val_1 = events_table.user_id
GROUP BY level_4.mx_val_1
) as level_5, partitioning_test
WHERE
level_5.avg_ev_type = partitioning_test.id
GROUP BY
level_5.avg_ev_type
) as level_6, users_table WHERE users_table.user_id = level_6.min
GROUP BY users_table.value_1
) as bar;
DEBUG: generating subplan 23_1 for subquery SELECT count(*) AS cnt, value_1 FROM subquery_and_partitioning.partitioning_test GROUP BY value_1
DEBUG: generating subplan 23_2 for subquery SELECT avg(events_table.event_type) AS avg FROM (SELECT level_1.cnt FROM (SELECT intermediate_result.cnt, intermediate_result.value_1 FROM read_intermediate_result('23_1'::text, 'binary'::citus_copy_format) intermediate_result(cnt bigint, value_1 integer)) level_1, public.users_table WHERE (users_table.user_id = level_1.cnt)) level_2, public.events_table WHERE (events_table.user_id = level_2.cnt) GROUP BY level_2.cnt
DEBUG: generating subplan 23_3 for subquery SELECT max(users_table.value_1) AS mx_val_1 FROM (SELECT intermediate_result.avg FROM read_intermediate_result('23_2'::text, 'binary'::citus_copy_format) intermediate_result(avg numeric)) level_3, public.users_table WHERE ((users_table.user_id)::numeric = level_3.avg) GROUP BY level_3.avg
DEBUG: generating subplan 23_4 for subquery SELECT avg(events_table.event_type) AS avg_ev_type FROM (SELECT intermediate_result.mx_val_1 FROM read_intermediate_result('23_3'::text, 'binary'::citus_copy_format) intermediate_result(mx_val_1 integer)) level_4, public.events_table WHERE (level_4.mx_val_1 = events_table.user_id) GROUP BY level_4.mx_val_1
DEBUG: generating subplan 23_5 for subquery SELECT min(partitioning_test.value_1) AS min FROM (SELECT intermediate_result.avg_ev_type FROM read_intermediate_result('23_4'::text, 'binary'::citus_copy_format) intermediate_result(avg_ev_type numeric)) level_5, subquery_and_partitioning.partitioning_test WHERE (level_5.avg_ev_type = (partitioning_test.id)::numeric) GROUP BY level_5.avg_ev_type
DEBUG: generating subplan 23_6 for subquery SELECT avg(level_6.min) AS avg FROM (SELECT intermediate_result.min FROM read_intermediate_result('23_5'::text, 'binary'::citus_copy_format) intermediate_result(min integer)) level_6, public.users_table WHERE (users_table.user_id = level_6.min) GROUP BY users_table.value_1
count
-------
0
(1 row)
SET client_min_messages TO DEFAULT;
DROP SCHEMA subquery_and_partitioning CASCADE;
NOTICE: drop cascades to 4 other objects
DETAIL: drop cascades to table users_table_local
drop cascades to table events_table_local
drop cascades to table partitioning_test
drop cascades to view subquery_and_ctes
SET search_path TO public;

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-- ===================================================================
-- test recursive planning functionality on partitioned tables
-- ===================================================================
CREATE SCHEMA subquery_and_partitioning;
SET search_path TO subquery_and_partitioning, public;
CREATE TABLE users_table_local AS SELECT * FROM users_table;
CREATE TABLE events_table_local AS SELECT * FROM events_table;
CREATE TABLE partitioning_test(id int, value_1 int, time date) PARTITION BY RANGE (time);
ERROR: syntax error at or near "PARTITION"
LINE 1: ...partitioning_test(id int, value_1 int, time date) PARTITION ...
^
-- create its partitions
CREATE TABLE partitioning_test_2017 PARTITION OF partitioning_test FOR VALUES FROM ('2017-01-01') TO ('2018-01-01');
ERROR: syntax error at or near "PARTITION"
LINE 1: CREATE TABLE partitioning_test_2017 PARTITION OF partitionin...
^
CREATE TABLE partitioning_test_2010 PARTITION OF partitioning_test FOR VALUES FROM ('2010-01-01') TO ('2011-01-01');
ERROR: syntax error at or near "PARTITION"
LINE 1: CREATE TABLE partitioning_test_2010 PARTITION OF partitionin...
^
-- load some data and distribute tables
INSERT INTO partitioning_test VALUES (1, 1, '2017-11-23');
ERROR: relation "partitioning_test" does not exist
LINE 1: INSERT INTO partitioning_test VALUES (1, 1, '2017-11-23');
^
INSERT INTO partitioning_test VALUES (2, 1, '2010-07-07');
ERROR: relation "partitioning_test" does not exist
LINE 1: INSERT INTO partitioning_test VALUES (2, 1, '2010-07-07');
^
INSERT INTO partitioning_test_2017 VALUES (3, 3, '2017-11-22');
ERROR: relation "partitioning_test_2017" does not exist
LINE 1: INSERT INTO partitioning_test_2017 VALUES (3, 3, '2017-11-22...
^
INSERT INTO partitioning_test_2010 VALUES (4, 4, '2010-03-03');
ERROR: relation "partitioning_test_2010" does not exist
LINE 1: INSERT INTO partitioning_test_2010 VALUES (4, 4, '2010-03-03...
^
-- distribute partitioned table
SET citus.shard_replication_factor TO 1;
SELECT create_distributed_table('partitioning_test', 'id');
ERROR: relation "partitioning_test" does not exist
LINE 1: SELECT create_distributed_table('partitioning_test', 'id');
^
SET client_min_messages TO DEBUG1;
-- subplan for partitioned tables
SELECT
id
FROM
(SELECT
DISTINCT partitioning_test.id
FROM
partitioning_test
LIMIT 5
) as foo
ORDER BY 1 DESC;
ERROR: relation "partitioning_test" does not exist
LINE 7: partitioning_test
^
-- final query is router on partitioned tables
SELECT
*
FROM
(SELECT
DISTINCT partitioning_test.id
FROM
partitioning_test
LIMIT 5
) as foo,
(SELECT
DISTINCT partitioning_test.time
FROM
partitioning_test
LIMIT 5
) as bar
WHERE foo.id = date_part('day', bar.time)
ORDER BY 2 DESC, 1;
ERROR: relation "partitioning_test" does not exist
LINE 7: partitioning_test
^
-- final query is real-time
SELECT
*
FROM
(SELECT
DISTINCT partitioning_test.time
FROM
partitioning_test
ORDER BY 1 DESC
LIMIT 5
) as foo,
(
SELECT
DISTINCT partitioning_test.id
FROM
partitioning_test
) as bar
WHERE date_part('day', foo.time) = bar.id
ORDER BY 2 DESC, 1 DESC
LIMIT 3;
ERROR: relation "partitioning_test" does not exist
LINE 7: partitioning_test
^
-- final query is real-time that is joined with partitioned table
SELECT
*
FROM
(SELECT
DISTINCT partitioning_test.time
FROM
partitioning_test
ORDER BY 1 DESC
LIMIT 5
) as foo,
(
SELECT
DISTINCT partitioning_test.id
FROM
partitioning_test
) as bar,
partitioning_test
WHERE date_part('day', foo.time) = bar.id AND partitioning_test.id = bar.id
ORDER BY 2 DESC, 1 DESC
LIMIT 3;
ERROR: relation "partitioning_test" does not exist
LINE 7: partitioning_test
^
-- subquery in WHERE clause
SELECT DISTINCT id
FROM partitioning_test
WHERE
id IN (SELECT DISTINCT date_part('day', time) FROM partitioning_test);
ERROR: relation "partitioning_test" does not exist
LINE 2: FROM partitioning_test
^
-- repartition subquery
SET citus.enable_repartition_joins to ON;
SELECT
count(*)
FROM
(
SELECT DISTINCT p1.value_1 FROM partitioning_test as p1, partitioning_test as p2 WHERE p1.id = p2.value_1
) as foo,
(
SELECT user_id FROM users_table
) as bar
WHERE foo.value_1 = bar.user_id;
ERROR: relation "partitioning_test" does not exist
LINE 5: SELECT DISTINCT p1.value_1 FROM partitioning_test as p1, pa...
^
SET citus.enable_repartition_joins to OFF;
-- subquery, cte, view and non-partitioned tables
CREATE VIEW subquery_and_ctes AS
SELECT
*
FROM
(
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT
user_id
FROM
events_table,
(SELECT DISTINCT value_1 FROM partitioning_test OFFSET 0) as foo
WHERE
events_table.user_id = foo.value_1 AND
events_table.user_id IN (SELECT DISTINCT value_1 FROM users_table ORDER BY 1 LIMIT 3)
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT
count(*) as cnt
FROM
cte,
(SELECT
DISTINCT events_table.user_id
FROM
partitioning_test, events_table
WHERE
events_table.user_id = partitioning_test.id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
WHERE foo.user_id = cte.user_id
) as foo, users_table WHERE foo.cnt > users_table.value_2;
ERROR: relation "partitioning_test" does not exist
LINE 15: (SELECT DISTINCT value_1 FROM partitioning_test OFFSET 0)...
^
SELECT * FROM subquery_and_ctes
ORDER BY 3 DESC, 1 DESC, 2 DESC, 4 DESC
LIMIT 5;
ERROR: relation "subquery_and_ctes" does not exist
LINE 1: SELECT * FROM subquery_and_ctes
^
-- deep subquery, partitioned and non-partitioned tables together
SELECT count(*)
FROM
(
SELECT avg(min) FROM
(
SELECT min(partitioning_test.value_1) FROM
(
SELECT avg(event_type) as avg_ev_type FROM
(
SELECT
max(value_1) as mx_val_1
FROM (
SELECT
avg(event_type) as avg
FROM
(
SELECT
cnt
FROM
(SELECT count(*) as cnt, value_1 FROM partitioning_test GROUP BY value_1) as level_1, users_table
WHERE
users_table.user_id = level_1.cnt
) as level_2, events_table
WHERE events_table.user_id = level_2.cnt
GROUP BY level_2.cnt
) as level_3, users_table
WHERE user_id = level_3.avg
GROUP BY level_3.avg
) as level_4, events_table
WHERE level_4.mx_val_1 = events_table.user_id
GROUP BY level_4.mx_val_1
) as level_5, partitioning_test
WHERE
level_5.avg_ev_type = partitioning_test.id
GROUP BY
level_5.avg_ev_type
) as level_6, users_table WHERE users_table.user_id = level_6.min
GROUP BY users_table.value_1
) as bar;
ERROR: relation "partitioning_test" does not exist
LINE 20: (SELECT count(*) as cnt, value_1 FROM partitioning_...
^
SET client_min_messages TO DEFAULT;
DROP SCHEMA subquery_and_partitioning CASCADE;
NOTICE: drop cascades to 2 other objects
DETAIL: drop cascades to table users_table_local
drop cascades to table events_table_local
SET search_path TO public;

285
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@ -0,0 +1,285 @@
-- ===================================================================
-- test recursive planning functionality on prepared statements
-- ===================================================================
CREATE SCHEMA subquery_prepared_statements;
SET search_path TO subquery_prepared_statements, public;
CREATE TYPE xy AS (x int, y int);
SELECT run_command_on_workers('CREATE SCHEMA subquery_prepared_statements');
run_command_on_workers
-------------------------------------
(localhost,57637,t,"CREATE SCHEMA")
(localhost,57638,t,"CREATE SCHEMA")
(2 rows)
SELECT run_command_on_workers('CREATE TYPE subquery_prepared_statements.xy AS (x int, y int)');
run_command_on_workers
-----------------------------------
(localhost,57637,t,"CREATE TYPE")
(localhost,57638,t,"CREATE TYPE")
(2 rows)
SET client_min_messages TO DEBUG1;
PREPARE subquery_prepare_without_param AS
SELECT
DISTINCT values_of_subquery
FROM
(SELECT
DISTINCT (users_table.user_id, events_table.event_type)::xy as values_of_subquery
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
PREPARE subquery_prepare_param_on_partkey(int) AS
SELECT
DISTINCT values_of_subquery
FROM
(SELECT
DISTINCT (users_table.user_id, events_table.event_type)::xy as values_of_subquery
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
(users_table.user_id = $1 OR users_table.user_id = 2) AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
PREPARE subquery_prepare_param_non_partkey(int) AS
SELECT
DISTINCT values_of_subquery
FROM
(SELECT
DISTINCT (users_table.user_id, events_table.event_type)::xy as values_of_subquery
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type = $1
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
-- execute each test with 6 times
EXECUTE subquery_prepare_without_param;
DEBUG: push down of limit count: 5
DEBUG: generating subplan 1_1 for subquery SELECT DISTINCT ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy AS values_of_subquery FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy DESC LIMIT 5
values_of_subquery
--------------------
(6,4)
(6,3)
(6,2)
(6,1)
(5,4)
(5 rows)
EXECUTE subquery_prepare_without_param;
values_of_subquery
--------------------
(6,4)
(6,3)
(6,2)
(6,1)
(5,4)
(5 rows)
EXECUTE subquery_prepare_without_param;
values_of_subquery
--------------------
(6,4)
(6,3)
(6,2)
(6,1)
(5,4)
(5 rows)
EXECUTE subquery_prepare_without_param;
values_of_subquery
--------------------
(6,4)
(6,3)
(6,2)
(6,1)
(5,4)
(5 rows)
EXECUTE subquery_prepare_without_param;
values_of_subquery
--------------------
(6,4)
(6,3)
(6,2)
(6,1)
(5,4)
(5 rows)
EXECUTE subquery_prepare_without_param;
values_of_subquery
--------------------
(6,4)
(6,3)
(6,2)
(6,1)
(5,4)
(5 rows)
EXECUTE subquery_prepare_without_param;
values_of_subquery
--------------------
(6,4)
(6,3)
(6,2)
(6,1)
(5,4)
(5 rows)
EXECUTE subquery_prepare_param_on_partkey(1);
DEBUG: push down of limit count: 5
DEBUG: generating subplan 3_1 for subquery SELECT DISTINCT ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy AS values_of_subquery FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND ((users_table.user_id = 1) OR (users_table.user_id = 2)) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy DESC LIMIT 5
values_of_subquery
--------------------
(2,4)
(2,3)
(2,2)
(2,1)
(1,4)
(5 rows)
EXECUTE subquery_prepare_param_on_partkey(1);
DEBUG: push down of limit count: 5
DEBUG: generating subplan 5_1 for subquery SELECT DISTINCT ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy AS values_of_subquery FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND ((users_table.user_id = 1) OR (users_table.user_id = 2)) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy DESC LIMIT 5
values_of_subquery
--------------------
(2,4)
(2,3)
(2,2)
(2,1)
(1,4)
(5 rows)
EXECUTE subquery_prepare_param_on_partkey(1);
DEBUG: push down of limit count: 5
DEBUG: generating subplan 7_1 for subquery SELECT DISTINCT ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy AS values_of_subquery FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND ((users_table.user_id = 1) OR (users_table.user_id = 2)) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy DESC LIMIT 5
values_of_subquery
--------------------
(2,4)
(2,3)
(2,2)
(2,1)
(1,4)
(5 rows)
EXECUTE subquery_prepare_param_on_partkey(1);
DEBUG: push down of limit count: 5
DEBUG: generating subplan 9_1 for subquery SELECT DISTINCT ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy AS values_of_subquery FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND ((users_table.user_id = 1) OR (users_table.user_id = 2)) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy DESC LIMIT 5
values_of_subquery
--------------------
(2,4)
(2,3)
(2,2)
(2,1)
(1,4)
(5 rows)
EXECUTE subquery_prepare_param_on_partkey(1);
DEBUG: push down of limit count: 5
DEBUG: generating subplan 11_1 for subquery SELECT DISTINCT ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy AS values_of_subquery FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND ((users_table.user_id = 1) OR (users_table.user_id = 2)) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy DESC LIMIT 5
values_of_subquery
--------------------
(2,4)
(2,3)
(2,2)
(2,1)
(1,4)
(5 rows)
EXECUTE subquery_prepare_param_on_partkey(1);
DEBUG: push down of limit count: 5
DEBUG: generating subplan 14_1 for subquery SELECT DISTINCT ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy AS values_of_subquery FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND ((users_table.user_id = 1) OR (users_table.user_id = 2)) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy DESC LIMIT 5
values_of_subquery
--------------------
(2,4)
(2,3)
(2,2)
(2,1)
(1,4)
(5 rows)
EXECUTE subquery_prepare_param_non_partkey(1);
DEBUG: push down of limit count: 5
DEBUG: generating subplan 16_1 for subquery SELECT DISTINCT ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy AS values_of_subquery FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = 1)) ORDER BY ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy DESC LIMIT 5
values_of_subquery
--------------------
(6,1)
(5,1)
(4,1)
(3,1)
(2,1)
(5 rows)
EXECUTE subquery_prepare_param_non_partkey(1);
DEBUG: push down of limit count: 5
DEBUG: generating subplan 18_1 for subquery SELECT DISTINCT ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy AS values_of_subquery FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = 1)) ORDER BY ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy DESC LIMIT 5
values_of_subquery
--------------------
(6,1)
(5,1)
(4,1)
(3,1)
(2,1)
(5 rows)
EXECUTE subquery_prepare_param_non_partkey(1);
DEBUG: push down of limit count: 5
DEBUG: generating subplan 20_1 for subquery SELECT DISTINCT ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy AS values_of_subquery FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = 1)) ORDER BY ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy DESC LIMIT 5
values_of_subquery
--------------------
(6,1)
(5,1)
(4,1)
(3,1)
(2,1)
(5 rows)
EXECUTE subquery_prepare_param_non_partkey(1);
DEBUG: push down of limit count: 5
DEBUG: generating subplan 22_1 for subquery SELECT DISTINCT ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy AS values_of_subquery FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = 1)) ORDER BY ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy DESC LIMIT 5
values_of_subquery
--------------------
(6,1)
(5,1)
(4,1)
(3,1)
(2,1)
(5 rows)
EXECUTE subquery_prepare_param_non_partkey(1);
DEBUG: push down of limit count: 5
DEBUG: generating subplan 24_1 for subquery SELECT DISTINCT ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy AS values_of_subquery FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = 1)) ORDER BY ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy DESC LIMIT 5
values_of_subquery
--------------------
(6,1)
(5,1)
(4,1)
(3,1)
(2,1)
(5 rows)
EXECUTE subquery_prepare_param_non_partkey(1);
DEBUG: push down of limit count: 5
DEBUG: generating subplan 27_1 for subquery SELECT DISTINCT ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy AS values_of_subquery FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = 1)) ORDER BY ROW(users_table.user_id, events_table.event_type)::subquery_prepared_statements.xy DESC LIMIT 5
values_of_subquery
--------------------
(6,1)
(5,1)
(4,1)
(3,1)
(2,1)
(5 rows)
SET client_min_messages TO DEFAULT;
DROP SCHEMA subquery_prepared_statements CASCADE;
NOTICE: drop cascades to type xy
SET search_path TO public;

566
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View File

@ -0,0 +1,566 @@
-- ===================================================================
-- test recursive planning functionality on views
-- ===================================================================
CREATE SCHEMA subquery_view;
SET search_path TO subquery_view, public;
CREATE TABLE users_table_local AS SELECT * FROM users_table;
CREATE TABLE events_table_local AS SELECT * FROM events_table;
SET client_min_messages TO DEBUG1;
CREATE VIEW view_without_subquery AS
SELECT
DISTINCT users_table.value_1
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC;
SELECT
*
FROM
view_without_subquery
ORDER BY 1 DESC LIMIT 5;
DEBUG: generating subplan 3_1 for subquery SELECT DISTINCT users_table.value_1 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.value_1 DESC
value_1
---------
5
4
3
2
1
(5 rows)
CREATE VIEW view_without_subquery_second AS
SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC
LIMIT 5;
SELECT
*
FROM
view_without_subquery_second
ORDER BY 1;
DEBUG: push down of limit count: 5
DEBUG: generating subplan 5_1 for subquery SELECT DISTINCT users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.user_id DESC LIMIT 5
user_id
---------
2
3
4
5
6
(5 rows)
-- subqueries in FROM clause with LIMIT should be recursively planned
CREATE VIEW subquery_limit AS
SELECT
user_id
FROM
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
SELECT * FROM subquery_limit ORDER BY 1 DESC;
DEBUG: push down of limit count: 5
DEBUG: generating subplan 7_1 for subquery SELECT DISTINCT users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.user_id DESC LIMIT 5
user_id
---------
6
5
4
3
2
(5 rows)
-- subqueries in FROM clause with GROUP BY non-distribution column should be recursively planned
CREATE VIEW subquery_non_p_key_group_by AS
SELECT
*
FROM
(SELECT
DISTINCT users_table.value_1
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1
) as foo
ORDER BY 1 DESC;
SELECT * FROM subquery_non_p_key_group_by ORDER BY 1 DESC;
DEBUG: generating subplan 9_1 for subquery SELECT DISTINCT users_table.value_1 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.value_1
value_1
---------
5
4
3
2
1
0
(6 rows)
CREATE VIEW final_query_router AS
SELECT
*
FROM
(SELECT
users_table.value_2
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
GROUP BY users_table.value_2
ORDER BY 1 DESC
) as foo,
(SELECT
users_table.value_3
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
GROUP BY users_table.value_3
ORDER BY 1 DESC
) as bar
WHERE foo.value_2 = bar.value_3
ORDER BY 2 DESC, 1;
SELECT * FROM final_query_router ORDER BY 1;
DEBUG: generating subplan 11_1 for subquery SELECT users_table.value_2 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) GROUP BY users_table.value_2 ORDER BY users_table.value_2 DESC
DEBUG: generating subplan 11_2 for subquery SELECT users_table.value_3 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[5, 6, 7, 8]))) GROUP BY users_table.value_3 ORDER BY users_table.value_3 DESC
value_2 | value_3
---------+---------
0 | 0
1 | 1
2 | 2
3 | 3
4 | 4
5 | 5
(6 rows)
CREATE VIEW final_query_realtime AS
SELECT
*
FROM
(SELECT
users_table.value_2
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
GROUP BY users_table.value_2
ORDER BY 1 DESC
) as foo,
(SELECT
users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
ORDER BY 1 DESC
) as bar
WHERE foo.value_2 = bar.user_id
ORDER BY 2 DESC, 1 DESC
LIMIT 3;
SELECT
DISTINCT ON (users_table.value_2) users_table.value_2, time, value_3
FROM
final_query_realtime, users_table
WHERE
users_table.user_id = final_query_realtime.user_id
ORDER BY 1 DESC, 2 DESC, 3 DESC
LIMIT 3;
DEBUG: generating subplan 14_1 for subquery SELECT users_table.value_2 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) GROUP BY users_table.value_2 ORDER BY users_table.value_2 DESC
DEBUG: push down of limit count: 3
DEBUG: generating subplan 14_2 for subquery SELECT foo.value_2, bar.user_id FROM (SELECT intermediate_result.value_2 FROM read_intermediate_result('14_1'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) foo, (SELECT users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[5, 6, 7, 8]))) ORDER BY users_table.user_id DESC) bar WHERE (foo.value_2 = bar.user_id) ORDER BY bar.user_id DESC, foo.value_2 DESC LIMIT 3
DEBUG: push down of limit count: 3
value_2 | time | value_3
---------+---------------------------------+---------
5 | Thu Nov 23 16:28:38.455322 2017 | 4
4 | Thu Nov 23 10:22:39.468816 2017 | 3
3 | Thu Nov 23 15:55:08.493462 2017 | 3
(3 rows)
CREATE VIEW subquery_in_where AS
SELECT DISTINCT user_id
FROM users_table
WHERE
user_id IN (SELECT DISTINCT value_2 FROM users_table WHERE value_1 >= 1 AND value_1 <= 20 ORDER BY 1 LIMIT 5);
SELECT
*
FROM
subquery_in_where
ORDER BY 1 DESC;
DEBUG: push down of limit count: 5
DEBUG: generating subplan 17_1 for subquery SELECT DISTINCT value_2 FROM public.users_table WHERE ((value_1 >= 1) AND (value_1 <= 20)) ORDER BY value_2 LIMIT 5
user_id
---------
4
3
2
1
(4 rows)
-- subquery in FROM -> FROM -> WHERE should be replaced due to LIMIT
CREATE VIEW subquery_from_from_where AS
SELECT user_id, array_length(events_table, 1)
FROM (
SELECT user_id, array_agg(event ORDER BY time) AS events_table
FROM (
SELECT
u.user_id, e.event_type::text AS event, e.time
FROM
users_table AS u,
events_table AS e
WHERE u.user_id = e.user_id AND
u.user_id IN
(
SELECT
user_id
FROM
users_table
WHERE value_2 >= 5
AND EXISTS (SELECT user_id FROM events_table WHERE event_type > 1 AND event_type <= 3 AND value_3 > 1 AND user_id = users_table.user_id)
AND NOT EXISTS (SELECT user_id FROM events_table WHERE event_type > 3 AND event_type <= 4 AND value_3 > 1 AND user_id = users_table.user_id)
LIMIT 5
)
) t
GROUP BY user_id
) q;
SELECT
*
FROM
subquery_from_from_where
ORDER BY
2 DESC, 1;
DEBUG: push down of limit count: 5
DEBUG: generating subplan 19_1 for subquery SELECT user_id FROM public.users_table WHERE ((value_2 >= 5) AND (EXISTS (SELECT events_table.user_id FROM public.events_table WHERE ((events_table.event_type > 1) AND (events_table.event_type <= 3) AND (events_table.value_3 > (1)::double precision) AND (events_table.user_id = users_table.user_id)))) AND (NOT (EXISTS (SELECT events_table.user_id FROM public.events_table WHERE ((events_table.event_type > 3) AND (events_table.event_type <= 4) AND (events_table.value_3 > (1)::double precision) AND (events_table.user_id = users_table.user_id)))))) LIMIT 5
user_id | array_length
---------+--------------
5 | 364
(1 row)
-- subquery in FROM -> FROM -> FROM should be replaced if
-- it contains onle local tables
CREATE VIEW subquery_from_from_where_local_table AS
SELECT
DISTINCT user_id
FROM
(
SELECT users_table.user_id FROM users_table,
(
SELECT
event_type, user_id
FROM
(SELECT event_type, users_table.user_id FROM users_table,
(SELECT user_id, event_type FROM events_table_local WHERE value_2 < 3 OFFSET 3) as foo
WHERE foo.user_id = users_table.user_id
) bar
) as baz
WHERE baz.user_id = users_table.user_id
) as sub1;
SELECT
*
FROM
subquery_from_from_where
ORDER BY 1 DESC
LIMIT 3;
DEBUG: push down of limit count: 5
DEBUG: generating subplan 21_1 for subquery SELECT user_id FROM public.users_table WHERE ((value_2 >= 5) AND (EXISTS (SELECT events_table.user_id FROM public.events_table WHERE ((events_table.event_type > 1) AND (events_table.event_type <= 3) AND (events_table.value_3 > (1)::double precision) AND (events_table.user_id = users_table.user_id)))) AND (NOT (EXISTS (SELECT events_table.user_id FROM public.events_table WHERE ((events_table.event_type > 3) AND (events_table.event_type <= 4) AND (events_table.value_3 > (1)::double precision) AND (events_table.user_id = users_table.user_id)))))) LIMIT 5
DEBUG: push down of limit count: 3
user_id | array_length
---------+--------------
5 | 364
(1 row)
SET citus.enable_repartition_joins to ON;
CREATE VIEW repartition_view AS
SELECT
count(*)
FROM
(
SELECT DISTINCT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.value_2 AND users_table.user_id < 2
) as foo,
(
SELECT user_id FROM users_table
) as bar
WHERE foo.value_2 = bar.user_id;
SELECT
*
FROM
repartition_view;
DEBUG: cannot use real time executor with repartition jobs
HINT: Since you enabled citus.enable_repartition_joins Citus chose to use task-tracker.
DEBUG: generating subplan 23_1 for subquery SELECT DISTINCT users_table.value_2 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.value_2) AND (users_table.user_id < 2))
DEBUG: generating subplan 23_2 for subquery SELECT count(*) AS count FROM (SELECT intermediate_result.value_2 FROM read_intermediate_result('23_1'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) foo, (SELECT users_table.user_id FROM public.users_table) bar WHERE (foo.value_2 = bar.user_id)
count
-------
58
(1 row)
CREATE VIEW all_executors_view AS
SELECT
count(*)
FROM
(
SELECT value_2 FROM users_table WHERE user_id = 15 OFFSET 0
) as foo,
(
SELECT user_id FROM users_table OFFSET 0
) as bar,
(
SELECT DISTINCT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.value_2 AND users_table.user_id < 2
) baz,
(
SELECT user_id FROM users_table_local WHERE user_id = 2
) baw
WHERE foo.value_2 = bar.user_id AND baz.value_2 = bar.user_id AND bar.user_id = baw.user_id;
SELECT
*
FROM
all_executors_view;
DEBUG: generating subplan 26_1 for subquery SELECT value_2 FROM public.users_table WHERE (user_id = 15) OFFSET 0
DEBUG: generating subplan 26_2 for subquery SELECT user_id FROM public.users_table OFFSET 0
DEBUG: cannot use real time executor with repartition jobs
HINT: Since you enabled citus.enable_repartition_joins Citus chose to use task-tracker.
DEBUG: generating subplan 26_3 for subquery SELECT DISTINCT users_table.value_2 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.value_2) AND (users_table.user_id < 2))
DEBUG: generating subplan 26_4 for subquery SELECT user_id FROM subquery_view.users_table_local WHERE (user_id = 2)
DEBUG: generating subplan 26_5 for subquery SELECT count(*) AS count FROM (SELECT intermediate_result.value_2 FROM read_intermediate_result('26_1'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) foo, (SELECT intermediate_result.user_id FROM read_intermediate_result('26_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) bar, (SELECT intermediate_result.value_2 FROM read_intermediate_result('26_3'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) baz, (SELECT intermediate_result.user_id FROM read_intermediate_result('26_4'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) baw WHERE ((foo.value_2 = bar.user_id) AND (baz.value_2 = bar.user_id) AND (bar.user_id = baw.user_id))
count
-------
0
(1 row)
SET citus.enable_repartition_joins to OFF;
-- the same query, but this time the CTEs also live inside a subquery
CREATE VIEW subquery_and_ctes AS
SELECT
*
FROM
(
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT
user_id
FROM
events_table,
(SELECT DISTINCT value_2 FROM users_table OFFSET 0) as foo
WHERE
events_table.user_id = foo.value_2 AND
events_table.user_id IN (SELECT DISTINCT value_1 FROM users_table ORDER BY 1 LIMIT 3)
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT
count(*) as cnt
FROM
cte,
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
WHERE foo.user_id = cte.user_id
) as foo, users_table WHERE foo.cnt > users_table.value_2;
SELECT * FROM subquery_and_ctes
ORDER BY 3 DESC, 1 DESC, 2 DESC, 4 DESC
LIMIT 5;
DEBUG: generating subplan 31_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_view.users_table_local), dist_cte AS (SELECT events_table.user_id FROM public.events_table, (SELECT DISTINCT users_table.value_2 FROM public.users_table OFFSET 0) foo WHERE ((events_table.user_id = foo.value_2) AND (events_table.user_id IN (SELECT DISTINCT users_table.value_1 FROM public.users_table ORDER BY users_table.value_1 LIMIT 3)))) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id = local_cte.user_id)))
DEBUG: generating subplan 32_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_view.users_table_local
DEBUG: generating subplan 32_2 for CTE dist_cte: SELECT events_table.user_id FROM public.events_table, (SELECT DISTINCT users_table.value_2 FROM public.users_table OFFSET 0) foo WHERE ((events_table.user_id = foo.value_2) AND (events_table.user_id IN (SELECT DISTINCT users_table.value_1 FROM public.users_table ORDER BY users_table.value_1 LIMIT 3)))
DEBUG: push down of limit count: 3
DEBUG: generating subplan 33_1 for subquery SELECT DISTINCT value_1 FROM public.users_table ORDER BY value_1 LIMIT 3
DEBUG: generating subplan 33_2 for subquery SELECT DISTINCT value_2 FROM public.users_table OFFSET 0
DEBUG: push down of limit count: 5
DEBUG: generating subplan 31_2 for subquery SELECT DISTINCT users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.user_id DESC LIMIT 5
DEBUG: generating subplan 31_3 for subquery SELECT count(*) AS cnt FROM (SELECT intermediate_result.user_id FROM read_intermediate_result('31_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) cte, (SELECT intermediate_result.user_id FROM read_intermediate_result('31_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) foo WHERE (foo.user_id = cte.user_id)
DEBUG: push down of limit count: 5
cnt | user_id | time | value_1 | value_2 | value_3 | value_4
-----+---------+---------------------------------+---------+---------+---------+---------
432 | 1 | Thu Nov 23 17:30:34.635085 2017 | 3 | 4 | 4 |
432 | 1 | Thu Nov 23 17:23:03.441394 2017 | 5 | 4 | 3 |
432 | 3 | Thu Nov 23 17:18:51.048758 2017 | 1 | 5 | 5 |
432 | 3 | Thu Nov 23 17:10:35.959913 2017 | 4 | 3 | 1 |
432 | 5 | Thu Nov 23 16:48:32.08896 2017 | 5 | 2 | 1 |
(5 rows)
CREATE VIEW subquery_and_ctes_second AS
SELECT time, event_type, value_2, value_3 FROM
(
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT user_id FROM events_table
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT DISTINCT cte.user_id
FROM users_table, cte
WHERE
users_table.user_id = cte.user_id AND
users_table.user_id IN
(WITH cte_in_where AS (SELECT DISTINCT value_2 FROM users_table WHERE value_1 >= 1 AND value_1 <= 20 ORDER BY 1 LIMIT 5) SELECT * FROM cte_in_where)
ORDER BY 1 DESC
) as foo,
events_table
WHERE
foo.user_id = events_table.value_2;
SELECT * FROM subquery_and_ctes_second
ORDER BY 3 DESC, 2 DESC, 1 DESC
LIMIT 5;
DEBUG: generating subplan 38_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_view.users_table_local), dist_cte AS (SELECT events_table.user_id FROM public.events_table) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id = local_cte.user_id)))
DEBUG: generating subplan 39_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_view.users_table_local
DEBUG: generating subplan 39_2 for CTE dist_cte: SELECT user_id FROM public.events_table
DEBUG: generating subplan 38_2 for CTE cte_in_where: SELECT DISTINCT value_2 FROM public.users_table WHERE ((value_1 >= 1) AND (value_1 <= 20)) ORDER BY value_2 LIMIT 5
DEBUG: push down of limit count: 5
DEBUG: generating subplan 38_3 for subquery SELECT DISTINCT cte.user_id FROM public.users_table, (SELECT intermediate_result.user_id FROM read_intermediate_result('38_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) cte WHERE ((users_table.user_id = cte.user_id) AND (users_table.user_id IN (SELECT cte_in_where.value_2 FROM (SELECT intermediate_result.value_2 FROM read_intermediate_result('38_2'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) cte_in_where))) ORDER BY cte.user_id DESC
DEBUG: push down of limit count: 5
time | event_type | value_2 | value_3
---------------------------------+------------+---------+---------
Thu Nov 23 21:54:46.924477 2017 | 6 | 4 | 5
Wed Nov 22 21:24:22.849224 2017 | 5 | 4 | 1
Wed Nov 22 21:05:25.194441 2017 | 5 | 4 | 1
Thu Nov 23 04:01:12.29256 2017 | 4 | 4 | 3
Thu Nov 23 09:33:16.992454 2017 | 3 | 4 | 1
(5 rows)
CREATE VIEW deep_subquery AS
SELECT count(*)
FROM
(
SELECT avg(min) FROM
(
SELECT min(users_table.value_1) FROM
(
SELECT avg(event_type) as avg_ev_type FROM
(
SELECT
max(value_1) as mx_val_1
FROM (
SELECT
avg(event_type) as avg
FROM
(
SELECT
cnt
FROM
(SELECT count(*) as cnt, value_2 FROM users_table GROUP BY value_2) as level_1, users_table
WHERE
users_table.user_id = level_1.cnt
) as level_2, events_table
WHERE events_table.user_id = level_2.cnt
GROUP BY level_2.cnt
) as level_3, users_table
WHERE user_id = level_3.avg
GROUP BY level_3.avg
) as level_4, events_table
WHERE level_4.mx_val_1 = events_table.user_id
GROUP BY level_4.mx_val_1
) as level_5, users_table
WHERE
level_5.avg_ev_type = users_table.user_id
GROUP BY
level_5.avg_ev_type
) as level_6, users_table WHERE users_table.user_id = level_6.min
GROUP BY users_table.value_1
) as bar;
SELECT
*
FROM
deep_subquery;
DEBUG: generating subplan 43_1 for subquery SELECT count(*) AS cnt, value_2 FROM public.users_table GROUP BY value_2
DEBUG: generating subplan 43_2 for subquery SELECT avg(events_table.event_type) AS avg FROM (SELECT level_1.cnt FROM (SELECT intermediate_result.cnt, intermediate_result.value_2 FROM read_intermediate_result('43_1'::text, 'binary'::citus_copy_format) intermediate_result(cnt bigint, value_2 integer)) level_1, public.users_table WHERE (users_table.user_id = level_1.cnt)) level_2, public.events_table WHERE (events_table.user_id = level_2.cnt) GROUP BY level_2.cnt
DEBUG: generating subplan 43_3 for subquery SELECT max(users_table.value_1) AS mx_val_1 FROM (SELECT intermediate_result.avg FROM read_intermediate_result('43_2'::text, 'binary'::citus_copy_format) intermediate_result(avg numeric)) level_3, public.users_table WHERE ((users_table.user_id)::numeric = level_3.avg) GROUP BY level_3.avg
DEBUG: generating subplan 43_4 for subquery SELECT avg(events_table.event_type) AS avg_ev_type FROM (SELECT intermediate_result.mx_val_1 FROM read_intermediate_result('43_3'::text, 'binary'::citus_copy_format) intermediate_result(mx_val_1 integer)) level_4, public.events_table WHERE (level_4.mx_val_1 = events_table.user_id) GROUP BY level_4.mx_val_1
DEBUG: generating subplan 43_5 for subquery SELECT min(users_table.value_1) AS min FROM (SELECT intermediate_result.avg_ev_type FROM read_intermediate_result('43_4'::text, 'binary'::citus_copy_format) intermediate_result(avg_ev_type numeric)) level_5, public.users_table WHERE (level_5.avg_ev_type = (users_table.user_id)::numeric) GROUP BY level_5.avg_ev_type
DEBUG: generating subplan 43_6 for subquery SELECT avg(level_6.min) AS avg FROM (SELECT intermediate_result.min FROM read_intermediate_result('43_5'::text, 'binary'::citus_copy_format) intermediate_result(min integer)) level_6, public.users_table WHERE (users_table.user_id = level_6.min) GROUP BY users_table.value_1
DEBUG: generating subplan 43_7 for subquery SELECT count(*) AS count FROM (SELECT intermediate_result.avg FROM read_intermediate_result('43_6'::text, 'binary'::citus_copy_format) intermediate_result(avg numeric)) bar
count
-------
0
(1 row)
CREATE VIEW result_of_view_is_also_recursively_planned AS
SELECT
user_id
FROM
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
SELECT
*
FROM
(SELECT
*
FROM
result_of_view_is_also_recursively_planned, events_table
WHERE
events_table.value_2 = result_of_view_is_also_recursively_planned.user_id
ORDER BY time DESC
LIMIT 5
OFFSET 4
) as foo
ORDER BY time DESC LIMIT 5;
DEBUG: push down of limit count: 5
DEBUG: generating subplan 51_1 for subquery SELECT DISTINCT users_table.user_id FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.user_id) AND (events_table.event_type = ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.user_id DESC LIMIT 5
DEBUG: push down of limit count: 9
DEBUG: generating subplan 51_2 for subquery SELECT result_of_view_is_also_recursively_planned.user_id, events_table.user_id, events_table."time", events_table.event_type, events_table.value_2, events_table.value_3, events_table.value_4 FROM (SELECT foo.user_id FROM (SELECT intermediate_result.user_id FROM read_intermediate_result('51_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) foo ORDER BY foo.user_id DESC) result_of_view_is_also_recursively_planned, public.events_table WHERE (events_table.value_2 = result_of_view_is_also_recursively_planned.user_id) ORDER BY events_table."time" DESC OFFSET 4 LIMIT 5
user_id | user_id | time | event_type | value_2 | value_3 | value_4
---------+---------+---------------------------------+------------+---------+---------+---------
2 | 3 | Thu Nov 23 16:44:41.903713 2017 | 4 | 2 | 2 |
2 | 5 | Thu Nov 23 16:11:02.929469 2017 | 4 | 2 | 0 |
4 | 5 | Thu Nov 23 14:40:40.467511 2017 | 1 | 4 | 1 |
3 | 2 | Thu Nov 23 14:02:47.738901 2017 | 1 | 3 | 2 |
3 | 6 | Thu Nov 23 14:00:13.20013 2017 | 3 | 3 | 3 |
(5 rows)
SET client_min_messages TO DEFAULT;
DROP SCHEMA subquery_view CASCADE;
NOTICE: drop cascades to 17 other objects
DETAIL: drop cascades to table users_table_local
drop cascades to table events_table_local
drop cascades to view view_without_subquery
drop cascades to view view_without_subquery_second
drop cascades to view subquery_limit
drop cascades to view subquery_non_p_key_group_by
drop cascades to view final_query_router
drop cascades to view final_query_realtime
drop cascades to view subquery_in_where
drop cascades to view subquery_from_from_where
drop cascades to view subquery_from_from_where_local_table
drop cascades to view repartition_view
drop cascades to view all_executors_view
drop cascades to view subquery_and_ctes
drop cascades to view subquery_and_ctes_second
drop cascades to view deep_subquery
drop cascades to view result_of_view_is_also_recursively_planned
SET search_path TO public;

39
src/test/regress/expected/with_basics.out
View File

@ -86,22 +86,27 @@ LIMIT
6 | 5
(5 rows)
-- CTE in subquery errors out
-- CTE in subquery recursively planned
SELECT user_id FROM (
WITH cte AS (
SELECT user_id, value_2 from users_table WHERE user_id IN (1, 2) ORDER BY 2 LIMIT 5
)
SELECT user_id FROM cte WHERE value_2 > 0
) a;
ERROR: cannot push down this subquery
DETAIL: CTEs in subqueries are currently unsupported
) a ORDER BY 1 LIMIT 3;
user_id
---------
2
2
2
(3 rows)
-- CTE outside of FROM/WHERE errors out
WITH cte AS (
SELECT user_id FROM users_table WHERE value_2 IN (1, 2)
)
SELECT (SELECT * FROM cte);
WARNING: more than one row returned by a subquery used as an expression
CONTEXT: while executing command on localhost:57638
CONTEXT: while executing command on localhost:57637
ERROR: could not receive query results
WITH cte_basic AS (
SELECT user_id FROM users_table WHERE user_id = 1
@ -541,8 +546,7 @@ FROM
SELECT * FROM users_table WHERE user_id>1
)
SELECT * FROM basic_recursive ORDER BY user_id LIMIT 1) cte_rec;
ERROR: cannot push down this subquery
DETAIL: CTEs in subqueries are currently unsupported
ERROR: recursive CTEs are not supported in distributed queries
-- basic_recursive in WHERE with UNION ALL
SELECT
*
@ -615,15 +619,24 @@ SELECT user_id, sum(value_2) FROM cte_user GROUP BY 1 ORDER BY 1, 2;
6 | 220
(6 rows)
SELECT * FROM cte_view;
ERROR: cannot push down this subquery
DETAIL: CTEs in subqueries are currently unsupported
SELECT * FROM cte_view ORDER BY 1, 2 LIMIT 5;
user_id | value_1
---------+---------
1 | 5
2 | 4
3 | 5
4 | 5
5 | 5
(5 rows)
WITH cte_user_with_view AS
(
SELECT * FROM cte_view WHERE user_id < 3
)
SELECT user_id, value_1 FROM cte_user_with_view ORDER BY 1, 2 LIMIT 10 OFFSET 3;
ERROR: cannot push down this subquery
DETAIL: CTEs in subqueries are currently unsupported
SELECT user_id, value_1 FROM cte_user_with_view ORDER BY 1, 2 LIMIT 10 OFFSET 2;
user_id | value_1
---------+---------
(0 rows)
DROP VIEW basic_view;
DROP VIEW cte_view;

18
src/test/regress/expected/with_join.out
View File

@ -84,6 +84,7 @@ ORDER BY
-- Subqueries in WHERE and FROM are mixed
-- In this query, only subquery in WHERE is not a colocated join
-- but we're able to recursively plan that as well
WITH users_events AS (
WITH colocated_join AS (
SELECT
@ -135,15 +136,22 @@ WITH users_events AS (
)
)
SELECT
*
DISTINCT uid
FROM
users_events
ORDER BY
1, 2
1 DESC
LIMIT
20;
ERROR: cannot pushdown the subquery
DETAIL: Complex subqueries and CTEs are not allowed in the FROM clause when the query has subqueries in the WHERE clause
5;
uid
-----
6
5
4
3
2
(5 rows)
-- cte LEFT JOIN distributed_table should error out
WITH cte AS (
SELECT * FROM users_table WHERE user_id = 1 ORDER BY value_1

8
src/test/regress/expected/with_where.out
View File

@ -122,6 +122,10 @@ WHERE
(1 row)
-- CTE in WHERE basic
-- this is a tricky query that hits an aggresive
-- check in subquery puwhdown after the recursive planning
-- where LIMIT should be allowed
-- if the query contains only intermediate results
SELECT
count(*)
FROM
@ -147,6 +151,10 @@ IN
(1 row)
-- CTE with non-colocated join in WHERE
-- this is a tricky query that hits an aggresive
-- check in subquery puwhdown after the recursive planning
-- where LIMIT should be allowed
-- if the query contains only intermediate results
SELECT
count(*)
FROM

8
src/test/regress/multi_schedule
View File

@ -38,6 +38,14 @@ test: multi_behavioral_analytics_basics multi_behavioral_analytics_single_shard_
# ----------
test: multi_partitioning_utils multi_partitioning
# ----------
# Tests for recursive subquery planning
# ----------
test: subquery_basics subquery_local_tables subquery_executors subquery_and_cte
test: subqueries_deep subquery_view subquery_partitioning subquery_complex_target_list subqueries_not_supported
test: subquery_prepared_statements
# ----------
# Miscellaneous tests to check our query planning behavior
# ----------

9
src/test/regress/sql/multi_complex_expressions.sql
View File

@ -157,12 +157,11 @@ SELECT count(*) FROM lineitem, orders WHERE l_orderkey + 1 = o_orderkey;
-- Check that we can issue limit/offset queries
-- OFFSET in subqueries are not supported
-- Error in the planner when single repartition subquery
SELECT * FROM (SELECT o_custkey FROM orders GROUP BY o_custkey ORDER BY o_custkey OFFSET 20) sq;
-- the subquery is recursively planned since it contains OFFSET, which is not pushdownable
SELECT * FROM (SELECT o_custkey FROM orders GROUP BY o_custkey ORDER BY o_custkey OFFSET 20) sq ORDER BY 1 LIMIT 5;
-- Error in the optimizer when subquery pushdown is on
SELECT * FROM (SELECT o_orderkey FROM orders ORDER BY o_orderkey OFFSET 20) sq;
-- the subquery is recursively planned since it contains OFFSET, which is not pushdownable
SELECT * FROM (SELECT o_orderkey FROM orders ORDER BY o_orderkey OFFSET 20) sq ORDER BY 1 LIMIT 5;
-- Simple LIMIT/OFFSET with ORDER BY
SELECT o_orderkey FROM orders ORDER BY o_orderkey LIMIT 10 OFFSET 20;

10
src/test/regress/sql/multi_insert_select.sql
View File

@ -795,7 +795,7 @@ FROM (SELECT SUM(raw_events_second.value_4) AS v4,
GROUP BY raw_events_second.user_id) AS foo;
-- INSERT partition column does not match with SELECT partition column
-- INSERT returns NULL partition key value via coordinator
INSERT INTO agg_events
(value_4_agg,
value_1_agg,
@ -874,8 +874,7 @@ SELECT
FROM
reference_table;
-- unsupported joins between subqueries
-- we do not return bare partition column on the inner query
-- foo2 is recursively planned and INSERT...SELECT is done via coordinator
INSERT INTO agg_events
(user_id)
SELECT f2.id FROM
@ -903,6 +902,7 @@ ON (f.id = f2.id);
-- the second part of the query is not routable since
-- GROUP BY not on the partition column (i.e., value_1) and thus join
-- on f.id = f2.id is not on the partition key (instead on the sum of partition key)
-- but we still recursively plan foo2 and run the query
INSERT INTO agg_events
(user_id)
SELECT f.id FROM
@ -1315,8 +1315,8 @@ SET client_min_messages TO INFO;
-- avoid constraint violations
TRUNCATE raw_events_first;
-- we don't support LIMIT even if it exists in the subqueries
-- in where clause
-- we don't support LIMIT for subquery pushdown, but
-- we recursively plan the query and run it via coordinator
INSERT INTO agg_events(user_id)
SELECT user_id
FROM users_table

2
src/test/regress/sql/multi_insert_select_non_pushable_queries.sql
View File

@ -662,7 +662,7 @@ FROM
ON users_table.user_id = temp.user_id
WHERE users_table.value_1 < 50;
-- not supported since one of the queries doesn't have a relation
-- supported via recursive planning
INSERT INTO agg_results (user_id, agg_time, value_2_agg)
SELECT
user_id,

18
src/test/regress/sql/multi_read_from_secondaries.sql
View File

@ -33,6 +33,24 @@ SELECT a FROM dest_table WHERE a = 1;
-- real-time selects are also allowed
SELECT a FROM dest_table;
-- subqueries are also allowed
SET client_min_messages TO DEBUG1;
SELECT
foo.a
FROM
(
WITH cte AS (
SELECT
DISTINCT dest_table.a
FROM
dest_table, source_table
WHERE
source_table.a = dest_table.a AND
dest_table.b IN (1,2,3,4)
) SELECT * FROM cte ORDER BY 1 DESC LIMIT 5
) as foo;
SET client_min_messages TO DEFAULT;
-- insert into is definitely not allowed
INSERT INTO dest_table (a, b)
SELECT a, b FROM source_table;

2
src/test/regress/sql/multi_simple_queries.sql
View File

@ -127,7 +127,7 @@ SELECT title FROM articles ORDER BY 1 LIMIT 5;
-- queries which involve functions in FROM clause are recursively planned
SELECT * FROM articles, position('om' in 'Thomas') ORDER BY 2 DESC, 1 DESC, 3 DESC LIMIT 5;
-- subqueries are not supported in WHERE clause in Citus
-- subqueries are supported in WHERE clause in Citus even if the relations are not distributed
SELECT * FROM articles WHERE author_id IN (SELECT id FROM authors WHERE name LIKE '%a');
-- subqueries are supported in FROM clause

10
src/test/regress/sql/multi_subquery.sql
View File

@ -30,8 +30,7 @@ SET
WHERE
shardid IN (SELECT shardid FROM pg_dist_shard WHERE logicalrelid = 'orders_subquery'::regclass ORDER BY shardid DESC LIMIT 1);
-- If group by is not on partition column then we error out from single table
-- repartition code path
-- If group by is not on partition column then we recursively plan
SELECT
avg(order_count)
FROM
@ -70,9 +69,9 @@ FROM
GROUP BY
l_orderkey) AS unit_prices;
-- Subqueries without relation with a volatile functions (non-constant)
-- Subqueries without relation with a volatile functions (non-constant) are planned recursively
SELECT count(*) FROM (
SELECT l_orderkey FROM lineitem_subquery JOIN (SELECT random()::int r) sub ON (l_orderkey = r)
SELECT l_orderkey FROM lineitem_subquery JOIN (SELECT random()::int r) sub ON (l_orderkey = r) WHERE r > 10
) b;
-- Check that we error out if there is non relation subqueries
@ -98,7 +97,8 @@ SELECT count(*) FROM
(SELECT l_orderkey FROM lineitem_subquery) UNION
(SELECT l_orderkey FROM lineitem_subquery)
) b;
-- Check that we error out if inner query has Limit but subquery_pushdown is not set
-- we'd error out if inner query has Limit but subquery_pushdown is not set
-- but we recursively plan the query
SELECT
avg(o_totalprice/l_quantity)
FROM

17
src/test/regress/sql/multi_subquery_complex_queries.sql
View File

@ -1120,7 +1120,9 @@ limit 50;
-- reset subquery_pushdown
SET citus.subquery_pushdown to OFF;
-- not supported since JOIN is not on the partition key
-- we recursively plan recent_events_1
-- but not some_users_data since it has a reference
-- from an outer query which is not recursively planned
SELECT "some_users_data".user_id, lastseen
FROM
(SELECT user_id, max(time) AS lastseen
@ -1154,8 +1156,9 @@ ORDER BY
user_id
limit 50;
-- not supported since JOIN is not on the partition key
-- see (2 * user_id as user_id) target list element
-- we recursively plan some queries but fail in the end
-- since some_users_data since it has a reference
-- from an outer query which is not recursively planned
SELECT "some_users_data".user_id, lastseen
FROM
(SELECT 2 * user_id as user_id, max(time) AS lastseen
@ -1465,7 +1468,9 @@ ORDER BY
user_id DESC
LIMIT 10;
-- not supported since lower LATERAL JOIN is not on the partition key
-- not pushdownable since lower LATERAL JOIN is not on the partition key
-- not recursively plannable due to LATERAL join where there is a reference
-- from an outer query
SELECT user_id, lastseen
FROM
(SELECT
@ -1995,7 +2000,9 @@ ORDER BY
LIMIT 10;
SET citus.subquery_pushdown to OFF;
-- not supported since join is not on the partition key
-- not pushdownable since lower LATERAL JOIN is not on the partition key
-- not recursively plannable due to LATERAL join where there is a reference
-- from an outer query
SELECT *
FROM
(SELECT

14
src/test/regress/sql/multi_subquery_complex_reference_clause.sql
View File

@ -980,14 +980,16 @@ SELECT foo.user_id FROM
WHERE event_type > 100
) as foo;
-- not supported since group by is on the reference table column
-- not pushdownable since group by is on the reference table column
-- recursively planned, but hits unsupported clause type error on the top level query
SELECT foo.user_id FROM
(
SELECT r.user_id, random() FROM users_table m JOIN events_reference_table r ON int4eq(m.user_id, r.user_id)
GROUP BY r.user_id
) as foo;
-- supported since the group by contains at least one distributed table
-- not pushdownable since the group by contains at least one distributed table
-- recursively planned, but hits unsupported clause type error on the top level query
SELECT foo.user_id FROM
(
SELECT r.user_id, random() FROM users_table m JOIN events_reference_table r ON int4eq(m.user_id, r.user_id)
@ -995,7 +997,8 @@ SELECT foo.user_id FROM
) as foo
ORDER BY 1 LIMIT 3;
-- not supported since distinct is on the reference table column
-- not pushdownable since distinct is on the reference table column
-- recursively planned, but hits unsupported clause type error on the top level query
SELECT foo.user_id FROM
(
SELECT DISTINCT r.user_id, random() FROM users_table m JOIN events_reference_table r ON int4eq(m.user_id, r.user_id)
@ -1048,7 +1051,8 @@ LIMIT 5
OFFSET 0;
-- should not push down this query since there is a distributed table (i.e., events_table)
-- which is not in the DISTINCT clause
-- which is not in the DISTINCT clause. Recursive planning also fails since router execution
-- is disabled
SELECT * FROM
(
SELECT DISTINCT users_reference_table.user_id FROM users_reference_table, events_table WHERE users_reference_table.user_id = events_table.value_4
@ -1076,6 +1080,8 @@ ORDER BY 1 DESC
LIMIT 4;
-- should not pushdown since there is a non partition column on the DISTINCT clause
-- Recursive planning also fails since router execution
-- is disabled
SELECT * FROM
(
SELECT

8
src/test/regress/sql/multi_subquery_in_where_clause.sql
View File

@ -489,13 +489,14 @@ ORDER BY 1 ASC
LIMIT 2;
-- subquery in where clause has a volatile function and no relation
-- thus we recursively plan it
SELECT
user_id
FROM
users_table
WHERE
value_2 >
(SELECT random())
(SELECT random()) AND user_id < 0
ORDER BY 1 ASC
LIMIT 2;
@ -519,7 +520,8 @@ WHERE
-- we can detect unsupported subquerues even if they appear
-- in WHERE subquery -> FROM subquery -> WHERE subquery
SELECT user_id
-- but we can recursively plan that anyway
SELECT DISTINCT user_id
FROM users_table
WHERE user_id
IN (SELECT
@ -543,7 +545,7 @@ WHERE user_id
AND e1.user_id IN (SELECT user_id FROM users_table LIMIT 3 )
) as f_outer
WHERE f_inner.user_id = f_outer.user_id
);
) ORDER BY 1 LIMIT 3;
-- semi join is not on the partition key for the third subquery
SELECT user_id

13
src/test/regress/sql/multi_subquery_union.sql
View File

@ -569,6 +569,8 @@ LIMIT 5;
-- now lets also have some unsupported queries
-- group by is not on the partition key
-- but we can still recursively plan it, though that is not suffient for pushdown
-- of the whole query
SELECT user_id, sum(counter)
FROM (
SELECT user_id, sum(value_2) AS counter FROM events_table GROUP BY user_id
@ -803,7 +805,9 @@ FROM
(SELECT users_table.user_id FROM events_table, users_table WHERE events_table.user_id = users_table.user_id)
) b;
-- we don't support subqueries without relations
-- we don't support pushing down subqueries without relations
-- recursive planning can replace that query, though the whole
-- query is not safe to pushdown
SELECT
count(*)
FROM
@ -813,7 +817,9 @@ FROM
(SELECT 1)
) b;
-- we don't support subqueries without relations
-- we don't support pushing down subqueries without relations
-- recursive planning can replace that query, though the whole
-- query is not safe to pushdown
SELECT
*
FROM
@ -843,6 +849,9 @@ FROM
ORDER BY 1 DESC, 2 DESC
LIMIT 5;
-- we don't support pushing down subqueries without relations
-- recursive planning can replace that query, though the whole
-- query is not safe to pushdown
SELECT ("final_query"."event_types") as types, count(*) AS sumOfEventType
FROM
( SELECT *, random()

15
src/test/regress/sql/multi_view.sql
View File

@ -146,8 +146,8 @@ SET citus.task_executor_type to DEFAULT;
CREATE VIEW lineitems_by_shipping_method AS
SELECT l_shipmode, count(*) as cnt FROM lineitem_hash_part GROUP BY 1;
-- following will fail due to non GROUP BY of partition key
SELECT * FROM lineitems_by_shipping_method;
-- following will be supported via recursive planning
SELECT * FROM lineitems_by_shipping_method ORDER BY 1,2 LIMIT 5;
-- create a view with group by on partition column
CREATE VIEW lineitems_by_orderkey AS
@ -348,18 +348,19 @@ CREATE VIEW distinct_user_with_value_1_3 AS SELECT DISTINCT user_id FROM users_t
SELECT * FROM distinct_user_with_value_1_3 ORDER BY user_id;
-- distinct is not supported if it is on a non-partition key
-- but will be supported via recursive planning
CREATE VIEW distinct_value_1 AS SELECT DISTINCT value_1 FROM users_table WHERE value_2 = 3;
SELECT * FROM distinct_value_1;
SELECT * FROM distinct_value_1 ORDER BY 1 DESC LIMIT 5;
-- CTEs are not supported even if they are on views
-- CTEs are supported even if they are on views
CREATE VIEW cte_view_1 AS
WITH c1 AS (SELECT * FROM users_table WHERE value_1 = 3) SELECT * FROM c1 WHERE value_2 < 4;
SELECT * FROM cte_view_1;
SELECT * FROM cte_view_1 ORDER BY 1,2,3,4,5 LIMIT 5;
-- this is single shard query but still not supported since it has view + cte
-- this is single shard query and still not supported since it has view + cte
-- router planner can't detect it
SELECT * FROM cte_view_1 WHERE user_id = 2;
SELECT * FROM cte_view_1 WHERE user_id = 2 ORDER BY 1,2,3,4,5;
-- if CTE itself prunes down to a single shard than the view is supported (router plannable)
CREATE VIEW cte_view_2 AS

160
src/test/regress/sql/subqueries_deep.sql Normal file
View File

@ -0,0 +1,160 @@
-- ===================================================================
-- test recursive planning functionality with subqueries and CTEs
-- ===================================================================
CREATE SCHEMA subquery_deep;
SET search_path TO subquery_and_ctes, public;
SET client_min_messages TO DEBUG1;
-- subquery in FROM -> FROM -> FROM should be replaced due to OFFSET
-- one level up subquery should be replaced due to GROUP BY on non partition key
-- one level up subquery should be replaced due to LIMUT
SELECT
DISTINCT user_id
FROM
(
SELECT users_table.user_id FROM users_table,
(
SELECT
avg(event_type) as avg_val
FROM
(SELECT event_type, users_table.user_id FROM users_table,
(SELECT user_id, event_type FROM events_table WHERE value_2 < 3 OFFSET 3) as foo
WHERE foo.user_id = users_table.user_id
) bar, users_table WHERE bar.user_id = users_table.user_id GROUP BY users_table.value_1
) as baz
WHERE baz.avg_val < users_table.user_id
LIMIT 3
) as sub1
ORDER BY 1 DESC;
-- subquery in FROM -> FROM -> WHERE -> WHERE should be replaced due to CTE
-- subquery in FROM -> FROM -> WHERE should be replaced due to LIMIT
-- one level above should be replaced due to DISTINCT on non-partition key
-- one level above should be replaced due to GROUP BY on non-partition key
SELECT event, array_length(events_table, 1)
FROM (
SELECT event, array_agg(t.user_id) AS events_table
FROM (
SELECT
DISTINCT ON(e.event_type::text) e.event_type::text as event, e.time, e.user_id
FROM
users_table AS u,
events_table AS e
WHERE u.user_id = e.user_id AND
u.user_id IN
(
SELECT
user_id
FROM
users_table
WHERE value_2 >= 5
AND EXISTS (SELECT user_id FROM events_table WHERE event_type > 1 AND event_type <= 3 AND value_3 > 1 AND user_id = users_table.user_id)
AND NOT EXISTS (SELECT user_id FROM events_table WHERE event_type > 3 AND event_type <= 4 AND value_3 > 1 AND user_id = users_table.user_id)
AND EXISTS (WITH cte AS (SELECT count(*) FROM users_table) SELECT * FROM cte)
LIMIT 5
)
) t, users_table WHERE users_table.value_1 = t.event::int
GROUP BY event
) q
ORDER BY 2 DESC, 1;
-- this test probably doesn't add too much value,
-- but recurse 6 times for fun
SELECT count(*)
FROM
(
SELECT avg(min) FROM
(
SELECT min(users_table.value_1) FROM
(
SELECT avg(event_type) as avg_ev_type FROM
(
SELECT
max(value_1) as mx_val_1
FROM (
SELECT
avg(event_type) as avg
FROM
(
SELECT
cnt
FROM
(SELECT count(*) as cnt, value_2 FROM users_table GROUP BY value_2) as level_1, users_table
WHERE
users_table.user_id = level_1.cnt
) as level_2, events_table
WHERE events_table.user_id = level_2.cnt
GROUP BY level_2.cnt
) as level_3, users_table
WHERE user_id = level_3.avg
GROUP BY level_3.avg
) as level_4, events_table
WHERE level_4.mx_val_1 = events_table.user_id
GROUP BY level_4.mx_val_1
) as level_5, users_table
WHERE
level_5.avg_ev_type = users_table.user_id
GROUP BY
level_5.avg_ev_type
) as level_6, users_table WHERE users_table.user_id = level_6.min
GROUP BY users_table.value_1
) as bar;
-- same query happening in the subqueries in WHERE
-- this test probably doesn't add too much value,
-- but recurse 6 times for fun
SELECT
*
FROM
users_table
WHERE user_id IN (
SELECT count(*)
FROM
(
SELECT avg(min) FROM
(
SELECT min(users_table.value_1) FROM
(
SELECT avg(event_type) as avg_ev_type FROM
(
SELECT
max(value_1) as mx_val_1
FROM (
SELECT
avg(event_type) as avg
FROM
(
SELECT
cnt
FROM
(SELECT count(*) as cnt, value_2 FROM users_table GROUP BY value_2) as level_1, users_table
WHERE
users_table.user_id = level_1.cnt
) as level_2, events_table
WHERE events_table.user_id = level_2.cnt
GROUP BY level_2.cnt
) as level_3, users_table
WHERE user_id = level_3.avg
GROUP BY level_3.avg
) as level_4, events_table
WHERE level_4.mx_val_1 = events_table.user_id
GROUP BY level_4.mx_val_1
) as level_5, users_table
WHERE
level_5.avg_ev_type = users_table.user_id
GROUP BY
level_5.avg_ev_type
) as level_6, users_table WHERE users_table.user_id = level_6.min
GROUP BY users_table.value_1
) as bar);
SET client_min_messages TO DEFAULT;
DROP SCHEMA subquery_deep CASCADE;
SET search_path TO public;

137
src/test/regress/sql/subqueries_not_supported.sql Normal file
View File

@ -0,0 +1,137 @@
-- ===================================================================
-- test recursive planning functionality on failure cases
-- ===================================================================
CREATE SCHEMA not_supported;
SET search_path TO not_supported, public;
SET client_min_messages TO DEBUG1;
CREATE TABLE users_table_local AS SELECT * FROM users_table;
-- we don't support subqueries with local tables when they are not leaf queries
SELECT
*
FROM
(
SELECT
users_table_local.user_id
FROM
users_table_local, (SELECT user_id FROM events_table) as evs
WHERE users_table_local.user_id = evs.user_id
) as foo;
-- we don't support subqueries with local tables when they are not leaf queries
SELECT user_id FROM users_table WHERE user_id IN
(SELECT
user_id
FROM
users_table_local JOIN (SELECT user_id FROM events_table_local) as foo
USING (user_id)
);
-- we don't support aggregate distinct if the group by is not on partition key, expect for count distinct
-- thus baz and bar are recursively planned but not foo
SELECT
*
FROM
(
SELECT avg(DISTINCT value_1), random() FROM users_table GROUP BY user_id OFFSET 3
) as baz,
(
SELECT count(DISTINCT value_1), random() FROM users_table GROUP BY value_2 OFFSET 3
) as bar,
(
SELECT avg(DISTINCT value_1), random() FROM users_table GROUP BY value_2 OFFSET 3
) as foo;
-- we don't support array_aggs with ORDER BYs
SELECT
*
FROM
(
SELECT
array_agg(users_table.user_id ORDER BY users_table.time)
FROM
users_table, (SELECT user_id FROM events_table) as evs
WHERE users_table.user_id = evs.user_id
GROUP BY users_table.user_id
LIMIT 5
) as foo;
-- we don't support queries with recurring tuples in the FROM
-- clause and subquery in WHERE clause
SELECT
*
FROM
(
SELECT
users_table.user_id
FROM
users_table, (SELECT user_id FROM events_table) as evs
WHERE users_table.user_id = evs.user_id
LIMIT 5
) as foo WHERE user_id IN (SELECT count(*) FROM users_table GROUP BY user_id);
-- we don't support recursive subqueries when router executor is disabled
SET citus.enable_router_execution TO false;
SELECT
user_id
FROM
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
SET citus.enable_router_execution TO true;
-- window functions are not allowed if they're not partitioned on the distribution column
SELECT
*
FROM
(
SELECT
user_id, time, rnk
FROM
(
SELECT
*, rank() OVER my_win as rnk
FROM
events_table
WINDOW my_win AS (PARTITION BY event_type ORDER BY time DESC)
) as foo
ORDER BY
3 DESC, 1 DESC, 2 DESC
LIMIT
10) as foo;
-- top level join is not on the distribution key thus not supported
-- (use random to prevent Postgres to pull subqueries)
SELECT
foo.value_2
FROM
(SELECT users_table.value_2, random() FROM users_table, events_table WHERE users_table.user_id = events_table.user_id AND event_type IN (1,2,3,4)) as foo,
(SELECT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.user_id AND event_type IN (5,6,7,8)) as bar
WHERE
foo.value_2 = bar.value_2;
-- OUTER JOINs where the outer part is recursively planned and not the other way
-- around is not supported
SELECT
foo.value_2
FROM
(SELECT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.user_id AND event_type IN (1,2,3,4) LIMIT 5) as foo
LEFT JOIN
(SELECT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.user_id AND event_type IN (5,6,7,8)) as bar
ON(foo.value_2 = bar.value_2);
SET client_min_messages TO DEFAULT;
DROP SCHEMA not_supported CASCADE;
SET search_path TO public;

326
src/test/regress/sql/subquery_and_cte.sql Normal file
View File

@ -0,0 +1,326 @@
-- ===================================================================
-- test recursive planning functionality with subqueries and CTEs
-- ===================================================================
CREATE SCHEMA subquery_and_ctes;
SET search_path TO subquery_and_ctes, public;
CREATE TABLE users_table_local AS SELECT * FROM users_table;
SET client_min_messages TO DEBUG1;
-- CTEs are recursively planned, and subquery foo is also recursively planned
-- final plan becomes a router plan
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT user_id FROM events_table
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT
count(*)
FROM
cte,
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
WHERE foo.user_id = cte.user_id;
-- CTEs are recursively planned, and subquery foo is also recursively planned
-- final plan becomes a real-time plan since we also have events_table in the
-- range table entries
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT user_id FROM events_table
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT
count(*)
FROM
cte,
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo, events_table
WHERE foo.user_id = cte.user_id AND events_table.user_id = cte.user_id;
-- CTEs are replaced and subquery in WHERE is also replaced
-- but the query is still real-time query since users_table is in the
-- range table list
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT user_id FROM events_table
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT DISTINCT cte.user_id
FROM users_table, cte
WHERE
users_table.user_id = cte.user_id AND
users_table.user_id IN (SELECT DISTINCT value_2 FROM users_table WHERE value_1 >= 1 AND value_1 <= 20 ORDER BY 1 LIMIT 5)
ORDER BY 1 DESC;
-- a very similar query as the above, but this time errors
-- out since we don't support subqueries in WHERE clause
-- when there is only intermediate results on the range table
-- note that this time subquery in WHERE clause is not replaced
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT user_id FROM events_table
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT DISTINCT cte.user_id
FROM cte
WHERE
cte.user_id IN (SELECT DISTINCT user_id FROM users_table WHERE value_1 >= 1 AND value_1 <= 20)
ORDER BY 1 DESC;
-- CTEs inside a subquery and the final query becomes a router
-- query
SELECT
user_id
FROM
(
WITH cte AS (
SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
) SELECT * FROM cte ORDER BY 1 DESC
) as foo;
-- CTEs inside a subquery and the final query becomes a
-- real-time query since the other subquery is safe to pushdown
SELECT
bar.user_id
FROM
(
WITH cte AS (
SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
) SELECT * FROM cte ORDER BY 1 DESC
) as foo,
(
SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
) as bar
WHERE foo.user_id = bar.user_id;
-- CTEs inside a deeper subquery
-- and also the subquery that contains the CTE is replaced
SELECT
DISTINCT bar.user_id
FROM
(
WITH cte AS (
SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
) SELECT * FROM cte ORDER BY 1 DESC
) as foo,
(
SELECT
users_table.user_id, some_events.event_type
FROM
users_table,
(
WITH cte AS (
SELECT
event_type, users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
value_1 IN (1,2)
) SELECT * FROM cte ORDER BY 1 DESC
) as some_events
WHERE
users_table.user_id = some_events.user_id AND
event_type IN (1,2,3,4)
ORDER BY 2,1
LIMIT 2
) as bar
WHERE foo.user_id = bar.user_id
ORDER BY 1 DESC LIMIT 5;
-- CTEs on the different parts of the query is replaced
-- and subquery foo is also replaced since it contains
-- DISTINCT on a non-partition key
SELECT * FROM
(
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT user_id FROM events_table
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT DISTINCT cte.user_id
FROM users_table, cte
WHERE
users_table.user_id = cte.user_id AND
users_table.user_id IN
(WITH cte_in_where AS (SELECT DISTINCT value_2 FROM users_table WHERE value_1 >= 1 AND value_1 <= 20 ORDER BY 1 LIMIT 5) SELECT * FROM cte_in_where)
ORDER BY 1 DESC
) as foo,
events_table
WHERE
foo.user_id = events_table.value_2
ORDER BY 3 DESC, 2 DESC, 1 DESC
LIMIT 5;
-- now recursively plan subqueries inside the CTEs that contains LIMIT and OFFSET
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT
user_id
FROM
events_table,
(SELECT DISTINCT value_2 FROM users_table OFFSET 0) as foo
WHERE
events_table.user_id = foo.value_2 AND
events_table.user_id IN (SELECT DISTINCT value_1 FROM users_table ORDER BY 1 LIMIT 3)
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT
count(*)
FROM
cte,
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
WHERE foo.user_id = cte.user_id;
-- the same query, but this time the CTEs also live inside a subquery
SELECT
*
FROM
(
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT
user_id
FROM
events_table,
(SELECT DISTINCT value_2 FROM users_table OFFSET 0) as foo
WHERE
events_table.user_id = foo.value_2 AND
events_table.user_id IN (SELECT DISTINCT value_1 FROM users_table ORDER BY 1 LIMIT 3)
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT
count(*) as cnt
FROM
cte,
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
WHERE foo.user_id = cte.user_id
) as foo, users_table WHERE foo.cnt > users_table.value_2
ORDER BY 3 DESC, 1 DESC, 2 DESC, 4 DESC
LIMIT 5;
-- recursive CTES are not supported inside subqueries as well
SELECT
bar.user_id
FROM
(
WITH RECURSIVE cte AS (
SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
) SELECT * FROM cte ORDER BY 1 DESC
) as foo,
(
SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
) as bar
WHERE foo.user_id = bar.user_id;
SET client_min_messages TO DEFAULT;
DROP SCHEMA subquery_and_ctes CASCADE;
SET search_path TO public;

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-- ===================================================================
-- test recursive planning functionality
-- ===================================================================
SET client_min_messages TO DEBUG1;
-- subqueries in FROM clause with LIMIT should be recursively planned
SELECT
user_id
FROM
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
-- subqueries in FROM clause with DISTINCT on non-partition key
-- should be recursively planned
SELECT
*
FROM
(SELECT
DISTINCT users_table.value_1
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1
) as foo
ORDER BY 1 DESC;
-- subqueries in FROM clause with GROUP BY on non-partition key
-- should be recursively planned
SELECT
*
FROM
(SELECT
users_table.value_2, avg(value_1)
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
GROUP BY users_table.value_2
ORDER BY 1 DESC
) as foo
ORDER BY 2 DESC, 1;
-- multiple subqueries in FROM clause should be replaced
-- and the final query is router query
SELECT
*
FROM
(SELECT
users_table.value_2
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
GROUP BY users_table.value_2
ORDER BY 1 DESC
) as foo,
(SELECT
users_table.value_3
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
GROUP BY users_table.value_3
ORDER BY 1 DESC
) as bar
WHERE foo.value_2 = bar.value_3
ORDER BY 2 DESC, 1;
-- same query with alias in the subquery
SELECT
DISTINCT ON (citus) citus, postgres, citus + 1 as c1, postgres-1 as p1
FROM
(SELECT
users_table.value_2
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
GROUP BY users_table.value_2
ORDER BY 1 DESC
) as foo(postgres),
(SELECT
users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
ORDER BY 1 DESC
) as bar (citus)
WHERE foo.postgres = bar.citus
ORDER BY 1 DESC, 2 DESC
LIMIT 3;
-- foo is replaced
-- and the final query is real-time
SELECT
*
FROM
(SELECT
users_table.value_2
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
GROUP BY users_table.value_2
ORDER BY 1 DESC
) as foo,
(SELECT
users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
ORDER BY 1 DESC
) as bar
WHERE foo.value_2 = bar.user_id
ORDER BY 2 DESC, 1 DESC
LIMIT 3;
-- subqueries in WHERE should be replaced
SELECT DISTINCT user_id
FROM users_table
WHERE
user_id IN (SELECT DISTINCT value_2 FROM users_table WHERE value_1 >= 1 AND value_1 <= 20 ORDER BY 1 LIMIT 5)
ORDER BY 1 DESC;
-- subquery in FROM -> FROM -> FROM should be replaced due to OFFSET
SELECT
DISTINCT user_id
FROM
(
SELECT users_table.user_id FROM users_table,
(
SELECT
event_type, user_id
FROM
(SELECT event_type, users_table.user_id FROM users_table,
(SELECT user_id, event_type FROM events_table WHERE value_2 < 3 OFFSET 3) as foo
WHERE foo.user_id = users_table.user_id
) bar
) as baz
WHERE baz.user_id = users_table.user_id
) as sub1
ORDER BY 1 DESC
LIMIT 3;
-- subquery in FROM -> FROM -> WHERE should be replaced due to LIMIT
SELECT user_id, array_length(events_table, 1)
FROM (
SELECT user_id, array_agg(event ORDER BY time) AS events_table
FROM (
SELECT
u.user_id, e.event_type::text AS event, e.time
FROM
users_table AS u,
events_table AS e
WHERE u.user_id = e.user_id AND
u.user_id IN
(
SELECT
user_id
FROM
users_table
WHERE value_2 >= 5
AND EXISTS (SELECT user_id FROM events_table WHERE event_type > 1 AND event_type <= 3 AND value_3 > 1 AND user_id = users_table.user_id)
AND NOT EXISTS (SELECT user_id FROM events_table WHERE event_type > 3 AND event_type <= 4 AND value_3 > 1 AND user_id = users_table.user_id)
LIMIT 5
)
) t
GROUP BY user_id
) q
ORDER BY 2 DESC, 1;
-- subquery (i.e., subquery_2) in WHERE->FROM should be replaced due to LIMIT
SELECT
user_id
FROM
users_table
WHERE
user_id IN
(
SELECT
user_id
FROM (
SELECT
subquery_1.user_id, count_pay
FROM
(
(SELECT
users_table.user_id,
'action=>1' AS event,
events_table.time
FROM
users_table,
events_table
WHERE
users_table.user_id = events_table.user_id AND
users_table.user_id >= 1 AND
users_table.user_id <= 3 AND
events_table.event_type > 1 AND events_table.event_type < 3
)
UNION
(SELECT
users_table.user_id,
'action=>2' AS event,
events_table.time
FROM
users_table,
events_table
WHERE
users_table.user_id = events_table.user_id AND
users_table.user_id >= 1 AND
users_table.user_id <= 3 AND
events_table.event_type > 2 AND events_table.event_type < 4
)
) AS subquery_1
LEFT JOIN
(SELECT
user_id,
COUNT(*) AS count_pay
FROM
users_table
WHERE
user_id >= 1 AND
user_id <= 3 AND
users_table.value_1 > 3 AND users_table.value_1 < 5
GROUP BY
user_id
HAVING
COUNT(*) > 1
LIMIT 10
) AS subquery_2
ON
subquery_1.user_id = subquery_2.user_id
GROUP BY
subquery_1.user_id,
count_pay) AS subquery_top
GROUP BY
count_pay, user_id
)
GROUP BY user_id
HAVING count(*) > 1 AND sum(value_2) > 29
ORDER BY 1;

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-- ===================================================================
-- test recursive planning functionality with different executors
-- ===================================================================
CREATE SCHEMA subquery_executor;
SET search_path TO subquery_executor, public;
CREATE TABLE users_table_local AS SELECT * FROM users_table;
SET client_min_messages TO DEBUG1;
-- subquery with router planner
SELECT
count(*)
FROM
(
SELECT value_2 FROM users_table WHERE user_id = 15 OFFSET 0
) as foo,
(
SELECT user_id FROM users_table
) as bar
WHERE foo.value_2 = bar.user_id;
-- subquery with router but not logical plannable
-- should fail
SELECT
count(*)
FROM
(
SELECT user_id, sum(value_2) over (partition by user_id) AS counter FROM users_table WHERE user_id = 15
) as foo,
(
SELECT user_id FROM users_table
) as bar
WHERE foo.counter = bar.user_id;
-- subquery with real-time query
SELECT
count(*)
FROM
(
SELECT value_2 FROM users_table WHERE user_id != 15 OFFSET 0
) as foo,
(
SELECT user_id FROM users_table
) as bar
WHERE foo.value_2 = bar.user_id;
-- subquery with repartition query
SET citus.enable_repartition_joins to ON;
SELECT
count(*)
FROM
(
SELECT DISTINCT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.value_2 AND users_table.user_id < 2
) as foo,
(
SELECT user_id FROM users_table
) as bar
WHERE foo.value_2 = bar.user_id;
-- mixed of all executors (including local execution)
SELECT
count(*)
FROM
(
SELECT value_2 FROM users_table WHERE user_id = 15 OFFSET 0
) as foo,
(
SELECT user_id FROM users_table OFFSET 0
) as bar,
(
SELECT DISTINCT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.value_2 AND users_table.user_id < 2
) baz,
(
SELECT user_id FROM users_table_local WHERE user_id = 2
) baw
WHERE foo.value_2 = bar.user_id AND baz.value_2 = bar.user_id AND bar.user_id = baw.user_id;
SET citus.enable_repartition_joins to OFF;
-- final query is router
SELECT
count(*)
FROM
(
SELECT value_2 FROM users_table WHERE user_id = 1 OFFSET 0
) as foo,
(
SELECT user_id FROM users_table WHERE user_id = 2 OFFSET 0
) as bar
WHERE foo.value_2 = bar.user_id;
-- final query is real-time
SELECT
count(*)
FROM
(
SELECT value_2 FROM users_table WHERE user_id = 1 OFFSET 0
) as foo,
(
SELECT user_id FROM users_table WHERE user_id != 2
) as bar
WHERE foo.value_2 = bar.user_id;
SET client_min_messages TO DEFAULT;
DROP SCHEMA subquery_executor CASCADE;
SET search_path TO public;

204
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-- ===================================================================
-- test recursive planning functionality on local tables
-- ===================================================================
CREATE SCHEMA subquery_local_tables;
SET search_path TO subquery_local_tables, public;
CREATE TABLE users_table_local AS SELECT * FROM users_table;
CREATE TABLE events_table_local AS SELECT * FROM events_table;
SET client_min_messages TO DEBUG1;
-- foo is only on the local tables, thus can be replaced
-- bar is on the distributed tables with LIMIT, should be replaced
SELECT
foo.user_id
FROM
(SELECT
DISTINCT users_table_local.user_id
FROM
users_table_local, events_table_local
WHERE
users_table_local.user_id = events_table_local.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo,
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
ORDER BY 1 DESC LIMIT 5
) as bar
WHERE bar.user_id = foo.user_id
ORDER BY 1 DESC;
-- foo is only on the local tables, thus can be replaced
SELECT
foo.user_id
FROM
(SELECT
DISTINCT users_table_local.user_id
FROM
users_table_local, events_table_local
WHERE
users_table_local.user_id = events_table_local.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo,
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
) as bar
WHERE bar.user_id = foo.user_id
ORDER BY 1 DESC;
-- subqueries in WHERE could be replaced even if they are on the local tables
SELECT DISTINCT user_id
FROM users_table
WHERE
user_id IN (SELECT DISTINCT value_2 FROM users_table_local WHERE value_1 = 1)
ORDER BY 1 LIMIT 5;
-- subquery in FROM -> FROM -> FROM should be replaced if
-- it contains onle local tables
SELECT
DISTINCT user_id
FROM
(
SELECT users_table.user_id FROM users_table,
(
SELECT
event_type, user_id
FROM
(SELECT event_type, users_table.user_id FROM users_table,
(SELECT user_id, event_type FROM events_table_local WHERE value_2 < 3 OFFSET 3) as foo
WHERE foo.user_id = users_table.user_id
) bar
) as baz
WHERE baz.user_id = users_table.user_id
) as sub1
ORDER BY 1 DESC
LIMIT 3;
-- subquery in FROM -> FROM -> WHERE -> WHERE should be replaced if
-- it contains onle local tables
-- Later the upper level query is also recursively planned due to LIMIT
SELECT user_id, array_length(events_table, 1)
FROM (
SELECT user_id, array_agg(event ORDER BY time) AS events_table
FROM (
SELECT
u.user_id, e.event_type::text AS event, e.time
FROM
users_table AS u,
events_table AS e
WHERE u.user_id = e.user_id AND
u.user_id IN
(
SELECT
user_id
FROM
users_table
WHERE value_2 >= 5
AND EXISTS (SELECT user_id FROM events_table_local WHERE event_type > 1 AND event_type <= 3 AND value_3 > 1)
AND NOT EXISTS (SELECT user_id FROM events_table WHERE event_type > 3 AND event_type <= 4 AND value_3 > 1 AND user_id = users_table.user_id)
LIMIT 5
)
) t
GROUP BY user_id
) q
ORDER BY 2 DESC, 1;
-- subquery (i.e., subquery_2) in WHERE->FROM should be replaced due to local tables
SELECT
user_id
FROM
users_table
WHERE
user_id IN
(
SELECT
user_id
FROM (
SELECT
subquery_1.user_id, count_pay
FROM
(
(SELECT
users_table.user_id,
'action=>1' AS event,
events_table.time
FROM
users_table,
events_table
WHERE
users_table.user_id = events_table.user_id AND
users_table.user_id >= 1 AND
users_table.user_id <= 3 AND
events_table.event_type > 1 AND events_table.event_type < 3
)
UNION
(SELECT
users_table.user_id,
'action=>2' AS event,
events_table.time
FROM
users_table,
events_table
WHERE
users_table.user_id = events_table.user_id AND
users_table.user_id >= 1 AND
users_table.user_id <= 3 AND
events_table.event_type > 2 AND events_table.event_type < 4
)
) AS subquery_1
LEFT JOIN
(SELECT
user_id,
COUNT(*) AS count_pay
FROM
users_table_local
WHERE
user_id >= 1 AND
user_id <= 3 AND
users_table_local.value_1 > 3 AND users_table_local.value_1 < 5
GROUP BY
user_id
HAVING
COUNT(*) > 1
LIMIT 10
) AS subquery_2
ON
subquery_1.user_id = subquery_2.user_id
GROUP BY
subquery_1.user_id,
count_pay) AS subquery_top
GROUP BY
count_pay, user_id
)
GROUP BY user_id
HAVING count(*) > 1 AND sum(value_2) > 29
ORDER BY 1;
SET client_min_messages TO DEFAULT;
DROP SCHEMA subquery_local_tables CASCADE;
SET search_path TO public;

213
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-- ===================================================================
-- test recursive planning functionality on partitioned tables
-- ===================================================================
CREATE SCHEMA subquery_and_partitioning;
SET search_path TO subquery_and_partitioning, public;
CREATE TABLE users_table_local AS SELECT * FROM users_table;
CREATE TABLE events_table_local AS SELECT * FROM events_table;
CREATE TABLE partitioning_test(id int, value_1 int, time date) PARTITION BY RANGE (time);
-- create its partitions
CREATE TABLE partitioning_test_2017 PARTITION OF partitioning_test FOR VALUES FROM ('2017-01-01') TO ('2018-01-01');
CREATE TABLE partitioning_test_2010 PARTITION OF partitioning_test FOR VALUES FROM ('2010-01-01') TO ('2011-01-01');
-- load some data and distribute tables
INSERT INTO partitioning_test VALUES (1, 1, '2017-11-23');
INSERT INTO partitioning_test VALUES (2, 1, '2010-07-07');
INSERT INTO partitioning_test_2017 VALUES (3, 3, '2017-11-22');
INSERT INTO partitioning_test_2010 VALUES (4, 4, '2010-03-03');
-- distribute partitioned table
SET citus.shard_replication_factor TO 1;
SELECT create_distributed_table('partitioning_test', 'id');
SET client_min_messages TO DEBUG1;
-- subplan for partitioned tables
SELECT
id
FROM
(SELECT
DISTINCT partitioning_test.id
FROM
partitioning_test
LIMIT 5
) as foo
ORDER BY 1 DESC;
-- final query is router on partitioned tables
SELECT
*
FROM
(SELECT
DISTINCT partitioning_test.id
FROM
partitioning_test
LIMIT 5
) as foo,
(SELECT
DISTINCT partitioning_test.time
FROM
partitioning_test
LIMIT 5
) as bar
WHERE foo.id = date_part('day', bar.time)
ORDER BY 2 DESC, 1;
-- final query is real-time
SELECT
*
FROM
(SELECT
DISTINCT partitioning_test.time
FROM
partitioning_test
ORDER BY 1 DESC
LIMIT 5
) as foo,
(
SELECT
DISTINCT partitioning_test.id
FROM
partitioning_test
) as bar
WHERE date_part('day', foo.time) = bar.id
ORDER BY 2 DESC, 1 DESC
LIMIT 3;
-- final query is real-time that is joined with partitioned table
SELECT
*
FROM
(SELECT
DISTINCT partitioning_test.time
FROM
partitioning_test
ORDER BY 1 DESC
LIMIT 5
) as foo,
(
SELECT
DISTINCT partitioning_test.id
FROM
partitioning_test
) as bar,
partitioning_test
WHERE date_part('day', foo.time) = bar.id AND partitioning_test.id = bar.id
ORDER BY 2 DESC, 1 DESC
LIMIT 3;
-- subquery in WHERE clause
SELECT DISTINCT id
FROM partitioning_test
WHERE
id IN (SELECT DISTINCT date_part('day', time) FROM partitioning_test);
-- repartition subquery
SET citus.enable_repartition_joins to ON;
SELECT
count(*)
FROM
(
SELECT DISTINCT p1.value_1 FROM partitioning_test as p1, partitioning_test as p2 WHERE p1.id = p2.value_1
) as foo,
(
SELECT user_id FROM users_table
) as bar
WHERE foo.value_1 = bar.user_id;
SET citus.enable_repartition_joins to OFF;
-- subquery, cte, view and non-partitioned tables
CREATE VIEW subquery_and_ctes AS
SELECT
*
FROM
(
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT
user_id
FROM
events_table,
(SELECT DISTINCT value_1 FROM partitioning_test OFFSET 0) as foo
WHERE
events_table.user_id = foo.value_1 AND
events_table.user_id IN (SELECT DISTINCT value_1 FROM users_table ORDER BY 1 LIMIT 3)
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT
count(*) as cnt
FROM
cte,
(SELECT
DISTINCT events_table.user_id
FROM
partitioning_test, events_table
WHERE
events_table.user_id = partitioning_test.id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
WHERE foo.user_id = cte.user_id
) as foo, users_table WHERE foo.cnt > users_table.value_2;
SELECT * FROM subquery_and_ctes
ORDER BY 3 DESC, 1 DESC, 2 DESC, 4 DESC
LIMIT 5;
-- deep subquery, partitioned and non-partitioned tables together
SELECT count(*)
FROM
(
SELECT avg(min) FROM
(
SELECT min(partitioning_test.value_1) FROM
(
SELECT avg(event_type) as avg_ev_type FROM
(
SELECT
max(value_1) as mx_val_1
FROM (
SELECT
avg(event_type) as avg
FROM
(
SELECT
cnt
FROM
(SELECT count(*) as cnt, value_1 FROM partitioning_test GROUP BY value_1) as level_1, users_table
WHERE
users_table.user_id = level_1.cnt
) as level_2, events_table
WHERE events_table.user_id = level_2.cnt
GROUP BY level_2.cnt
) as level_3, users_table
WHERE user_id = level_3.avg
GROUP BY level_3.avg
) as level_4, events_table
WHERE level_4.mx_val_1 = events_table.user_id
GROUP BY level_4.mx_val_1
) as level_5, partitioning_test
WHERE
level_5.avg_ev_type = partitioning_test.id
GROUP BY
level_5.avg_ev_type
) as level_6, users_table WHERE users_table.user_id = level_6.min
GROUP BY users_table.value_1
) as bar;
SET client_min_messages TO DEFAULT;
DROP SCHEMA subquery_and_partitioning CASCADE;
SET search_path TO public;

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-- ===================================================================
-- test recursive planning functionality on prepared statements
-- ===================================================================
CREATE SCHEMA subquery_prepared_statements;
SET search_path TO subquery_prepared_statements, public;
CREATE TYPE xy AS (x int, y int);
SELECT run_command_on_workers('CREATE SCHEMA subquery_prepared_statements');
SELECT run_command_on_workers('CREATE TYPE subquery_prepared_statements.xy AS (x int, y int)');
SET client_min_messages TO DEBUG1;
PREPARE subquery_prepare_without_param AS
SELECT
DISTINCT values_of_subquery
FROM
(SELECT
DISTINCT (users_table.user_id, events_table.event_type)::xy as values_of_subquery
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
PREPARE subquery_prepare_param_on_partkey(int) AS
SELECT
DISTINCT values_of_subquery
FROM
(SELECT
DISTINCT (users_table.user_id, events_table.event_type)::xy as values_of_subquery
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
(users_table.user_id = $1 OR users_table.user_id = 2) AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
PREPARE subquery_prepare_param_non_partkey(int) AS
SELECT
DISTINCT values_of_subquery
FROM
(SELECT
DISTINCT (users_table.user_id, events_table.event_type)::xy as values_of_subquery
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type = $1
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
-- execute each test with 6 times
EXECUTE subquery_prepare_without_param;
EXECUTE subquery_prepare_without_param;
EXECUTE subquery_prepare_without_param;
EXECUTE subquery_prepare_without_param;
EXECUTE subquery_prepare_without_param;
EXECUTE subquery_prepare_without_param;
EXECUTE subquery_prepare_without_param;
EXECUTE subquery_prepare_param_on_partkey(1);
EXECUTE subquery_prepare_param_on_partkey(1);
EXECUTE subquery_prepare_param_on_partkey(1);
EXECUTE subquery_prepare_param_on_partkey(1);
EXECUTE subquery_prepare_param_on_partkey(1);
EXECUTE subquery_prepare_param_on_partkey(1);
EXECUTE subquery_prepare_param_non_partkey(1);
EXECUTE subquery_prepare_param_non_partkey(1);
EXECUTE subquery_prepare_param_non_partkey(1);
EXECUTE subquery_prepare_param_non_partkey(1);
EXECUTE subquery_prepare_param_non_partkey(1);
EXECUTE subquery_prepare_param_non_partkey(1);
SET client_min_messages TO DEFAULT;
DROP SCHEMA subquery_prepared_statements CASCADE;
SET search_path TO public;

427
src/test/regress/sql/subquery_view.sql Normal file
View File

@ -0,0 +1,427 @@
-- ===================================================================
-- test recursive planning functionality on views
-- ===================================================================
CREATE SCHEMA subquery_view;
SET search_path TO subquery_view, public;
CREATE TABLE users_table_local AS SELECT * FROM users_table;
CREATE TABLE events_table_local AS SELECT * FROM events_table;
SET client_min_messages TO DEBUG1;
CREATE VIEW view_without_subquery AS
SELECT
DISTINCT users_table.value_1
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC;
SELECT
*
FROM
view_without_subquery
ORDER BY 1 DESC LIMIT 5;
CREATE VIEW view_without_subquery_second AS
SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC
LIMIT 5;
SELECT
*
FROM
view_without_subquery_second
ORDER BY 1;
-- subqueries in FROM clause with LIMIT should be recursively planned
CREATE VIEW subquery_limit AS
SELECT
user_id
FROM
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
SELECT * FROM subquery_limit ORDER BY 1 DESC;
-- subqueries in FROM clause with GROUP BY non-distribution column should be recursively planned
CREATE VIEW subquery_non_p_key_group_by AS
SELECT
*
FROM
(SELECT
DISTINCT users_table.value_1
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1
) as foo
ORDER BY 1 DESC;
SELECT * FROM subquery_non_p_key_group_by ORDER BY 1 DESC;
CREATE VIEW final_query_router AS
SELECT
*
FROM
(SELECT
users_table.value_2
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
GROUP BY users_table.value_2
ORDER BY 1 DESC
) as foo,
(SELECT
users_table.value_3
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
GROUP BY users_table.value_3
ORDER BY 1 DESC
) as bar
WHERE foo.value_2 = bar.value_3
ORDER BY 2 DESC, 1;
SELECT * FROM final_query_router ORDER BY 1;
CREATE VIEW final_query_realtime AS
SELECT
*
FROM
(SELECT
users_table.value_2
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
GROUP BY users_table.value_2
ORDER BY 1 DESC
) as foo,
(SELECT
users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
ORDER BY 1 DESC
) as bar
WHERE foo.value_2 = bar.user_id
ORDER BY 2 DESC, 1 DESC
LIMIT 3;
SELECT
DISTINCT ON (users_table.value_2) users_table.value_2, time, value_3
FROM
final_query_realtime, users_table
WHERE
users_table.user_id = final_query_realtime.user_id
ORDER BY 1 DESC, 2 DESC, 3 DESC
LIMIT 3;
CREATE VIEW subquery_in_where AS
SELECT DISTINCT user_id
FROM users_table
WHERE
user_id IN (SELECT DISTINCT value_2 FROM users_table WHERE value_1 >= 1 AND value_1 <= 20 ORDER BY 1 LIMIT 5);
SELECT
*
FROM
subquery_in_where
ORDER BY 1 DESC;
-- subquery in FROM -> FROM -> WHERE should be replaced due to LIMIT
CREATE VIEW subquery_from_from_where AS
SELECT user_id, array_length(events_table, 1)
FROM (
SELECT user_id, array_agg(event ORDER BY time) AS events_table
FROM (
SELECT
u.user_id, e.event_type::text AS event, e.time
FROM
users_table AS u,
events_table AS e
WHERE u.user_id = e.user_id AND
u.user_id IN
(
SELECT
user_id
FROM
users_table
WHERE value_2 >= 5
AND EXISTS (SELECT user_id FROM events_table WHERE event_type > 1 AND event_type <= 3 AND value_3 > 1 AND user_id = users_table.user_id)
AND NOT EXISTS (SELECT user_id FROM events_table WHERE event_type > 3 AND event_type <= 4 AND value_3 > 1 AND user_id = users_table.user_id)
LIMIT 5
)
) t
GROUP BY user_id
) q;
SELECT
*
FROM
subquery_from_from_where
ORDER BY
2 DESC, 1;
-- subquery in FROM -> FROM -> FROM should be replaced if
-- it contains onle local tables
CREATE VIEW subquery_from_from_where_local_table AS
SELECT
DISTINCT user_id
FROM
(
SELECT users_table.user_id FROM users_table,
(
SELECT
event_type, user_id
FROM
(SELECT event_type, users_table.user_id FROM users_table,
(SELECT user_id, event_type FROM events_table_local WHERE value_2 < 3 OFFSET 3) as foo
WHERE foo.user_id = users_table.user_id
) bar
) as baz
WHERE baz.user_id = users_table.user_id
) as sub1;
SELECT
*
FROM
subquery_from_from_where
ORDER BY 1 DESC
LIMIT 3;
SET citus.enable_repartition_joins to ON;
CREATE VIEW repartition_view AS
SELECT
count(*)
FROM
(
SELECT DISTINCT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.value_2 AND users_table.user_id < 2
) as foo,
(
SELECT user_id FROM users_table
) as bar
WHERE foo.value_2 = bar.user_id;
SELECT
*
FROM
repartition_view;
CREATE VIEW all_executors_view AS
SELECT
count(*)
FROM
(
SELECT value_2 FROM users_table WHERE user_id = 15 OFFSET 0
) as foo,
(
SELECT user_id FROM users_table OFFSET 0
) as bar,
(
SELECT DISTINCT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.value_2 AND users_table.user_id < 2
) baz,
(
SELECT user_id FROM users_table_local WHERE user_id = 2
) baw
WHERE foo.value_2 = bar.user_id AND baz.value_2 = bar.user_id AND bar.user_id = baw.user_id;
SELECT
*
FROM
all_executors_view;
SET citus.enable_repartition_joins to OFF;
-- the same query, but this time the CTEs also live inside a subquery
CREATE VIEW subquery_and_ctes AS
SELECT
*
FROM
(
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT
user_id
FROM
events_table,
(SELECT DISTINCT value_2 FROM users_table OFFSET 0) as foo
WHERE
events_table.user_id = foo.value_2 AND
events_table.user_id IN (SELECT DISTINCT value_1 FROM users_table ORDER BY 1 LIMIT 3)
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT
count(*) as cnt
FROM
cte,
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
WHERE foo.user_id = cte.user_id
) as foo, users_table WHERE foo.cnt > users_table.value_2;
SELECT * FROM subquery_and_ctes
ORDER BY 3 DESC, 1 DESC, 2 DESC, 4 DESC
LIMIT 5;
CREATE VIEW subquery_and_ctes_second AS
SELECT time, event_type, value_2, value_3 FROM
(
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT user_id FROM events_table
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT DISTINCT cte.user_id
FROM users_table, cte
WHERE
users_table.user_id = cte.user_id AND
users_table.user_id IN
(WITH cte_in_where AS (SELECT DISTINCT value_2 FROM users_table WHERE value_1 >= 1 AND value_1 <= 20 ORDER BY 1 LIMIT 5) SELECT * FROM cte_in_where)
ORDER BY 1 DESC
) as foo,
events_table
WHERE
foo.user_id = events_table.value_2;
SELECT * FROM subquery_and_ctes_second
ORDER BY 3 DESC, 2 DESC, 1 DESC
LIMIT 5;
CREATE VIEW deep_subquery AS
SELECT count(*)
FROM
(
SELECT avg(min) FROM
(
SELECT min(users_table.value_1) FROM
(
SELECT avg(event_type) as avg_ev_type FROM
(
SELECT
max(value_1) as mx_val_1
FROM (
SELECT
avg(event_type) as avg
FROM
(
SELECT
cnt
FROM
(SELECT count(*) as cnt, value_2 FROM users_table GROUP BY value_2) as level_1, users_table
WHERE
users_table.user_id = level_1.cnt
) as level_2, events_table
WHERE events_table.user_id = level_2.cnt
GROUP BY level_2.cnt
) as level_3, users_table
WHERE user_id = level_3.avg
GROUP BY level_3.avg
) as level_4, events_table
WHERE level_4.mx_val_1 = events_table.user_id
GROUP BY level_4.mx_val_1
) as level_5, users_table
WHERE
level_5.avg_ev_type = users_table.user_id
GROUP BY
level_5.avg_ev_type
) as level_6, users_table WHERE users_table.user_id = level_6.min
GROUP BY users_table.value_1
) as bar;
SELECT
*
FROM
deep_subquery;
CREATE VIEW result_of_view_is_also_recursively_planned AS
SELECT
user_id
FROM
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
SELECT
*
FROM
(SELECT
*
FROM
result_of_view_is_also_recursively_planned, events_table
WHERE
events_table.value_2 = result_of_view_is_also_recursively_planned.user_id
ORDER BY time DESC
LIMIT 5
OFFSET 4
) as foo
ORDER BY time DESC LIMIT 5;
SET client_min_messages TO DEFAULT;
DROP SCHEMA subquery_view CASCADE;
SET search_path TO public;

8
src/test/regress/sql/with_basics.sql
View File

@ -54,13 +54,13 @@ ORDER BY
LIMIT
5;
-- CTE in subquery errors out
-- CTE in subquery recursively planned
SELECT user_id FROM (
WITH cte AS (
SELECT user_id, value_2 from users_table WHERE user_id IN (1, 2) ORDER BY 2 LIMIT 5
)
SELECT user_id FROM cte WHERE value_2 > 0
) a;
) a ORDER BY 1 LIMIT 3;
-- CTE outside of FROM/WHERE errors out
WITH cte AS (
@ -458,14 +458,14 @@ WITH cte_user AS (
)
SELECT user_id, sum(value_2) FROM cte_user GROUP BY 1 ORDER BY 1, 2;
SELECT * FROM cte_view;
SELECT * FROM cte_view ORDER BY 1, 2 LIMIT 5;
WITH cte_user_with_view AS
(
SELECT * FROM cte_view WHERE user_id < 3
)
SELECT user_id, value_1 FROM cte_user_with_view ORDER BY 1, 2 LIMIT 10 OFFSET 3;
SELECT user_id, value_1 FROM cte_user_with_view ORDER BY 1, 2 LIMIT 10 OFFSET 2;
DROP VIEW basic_view;
DROP VIEW cte_view;

7
src/test/regress/sql/with_join.sql
View File

@ -66,6 +66,7 @@ ORDER BY
-- Subqueries in WHERE and FROM are mixed
-- In this query, only subquery in WHERE is not a colocated join
-- but we're able to recursively plan that as well
WITH users_events AS (
WITH colocated_join AS (
SELECT
@ -117,13 +118,13 @@ WITH users_events AS (
)
)
SELECT
*
DISTINCT uid
FROM
users_events
ORDER BY
1, 2
1 DESC
LIMIT
20;
5;
-- cte LEFT JOIN distributed_table should error out
WITH cte AS (

8
src/test/regress/sql/with_where.sql
View File

@ -110,6 +110,10 @@ WHERE
);
-- CTE in WHERE basic
-- this is a tricky query that hits an aggresive
-- check in subquery puwhdown after the recursive planning
-- where LIMIT should be allowed
-- if the query contains only intermediate results
SELECT
count(*)
FROM
@ -131,6 +135,10 @@ IN
);
-- CTE with non-colocated join in WHERE
-- this is a tricky query that hits an aggresive
-- check in subquery puwhdown after the recursive planning
-- where LIMIT should be allowed
-- if the query contains only intermediate results
SELECT
count(*)
FROM