citus/src/test/regress/expected/subquery_append.out

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CREATE SCHEMA subquery_append;
SET search_path TO subquery_append;
CREATE TABLE append_table (key text, value int, extra int default 0);
CREATE INDEX ON append_table (key);
SELECT create_distributed_table('append_table', 'key', 'append');
create_distributed_table
---------------------------------------------------------------------
(1 row)
SELECT master_create_empty_shard('append_table') AS shardid1 \gset
SELECT master_create_empty_shard('append_table') AS shardid2 \gset
SELECT master_create_empty_shard('append_table') AS shardid3 \gset
CREATE TABLE ref_table (value int);
CREATE INDEX ON ref_table (value);
SELECT create_reference_table('ref_table');
create_reference_table
---------------------------------------------------------------------
(1 row)
COPY append_table (key,value) FROM STDIN WITH (format 'csv', append_to_shard :shardid1);
COPY append_table (key,value) FROM STDIN WITH (format 'csv', append_to_shard :shardid2);
COPY ref_table FROM STDIN WITH CSV;
-- exercise some optimizer pushdown features with subqueries
SELECT count(*) FROM (SELECT random() FROM append_table) u;
count
---------------------------------------------------------------------
12
(1 row)
SELECT * FROM (SELECT DISTINCT key FROM append_table) sub ORDER BY 1 LIMIT 3;
key
---------------------------------------------------------------------
abc
bcd
cde
(3 rows)
SELECT DISTINCT key FROM (SELECT key FROM append_table) sub ORDER BY 1 LIMIT 3;
key
---------------------------------------------------------------------
abc
bcd
cde
(3 rows)
SELECT key, max(v) FROM (SELECT key, value + 1 AS v FROM append_table) sub GROUP BY key ORDER BY 1,2 LIMIT 3;
key | max
---------------------------------------------------------------------
abc | 235
bcd | 235
cde | 346
(3 rows)
SELECT v, max(key) FROM (SELECT key, value + 1 AS v FROM append_table) sub GROUP BY v ORDER BY 1,2 LIMIT 3;
v | max
---------------------------------------------------------------------
1 | jkl
2 | ijk
124 | hij
(3 rows)
SELECT key, row_number() OVER (ORDER BY key, value) FROM (SELECT key, value, random() FROM append_table) sub ORDER BY 1,2 LIMIT 3;
key | row_number
---------------------------------------------------------------------
abc | 1
abc | 2
bcd | 3
(3 rows)
SELECT key, row_number() OVER (PARTITION BY key ORDER BY key,value) FROM (SELECT key, value, random() FROM append_table) sub ORDER BY 1,2 LIMIT 3;
key | row_number
---------------------------------------------------------------------
abc | 1
abc | 2
bcd | 1
(3 rows)
SELECT key, row_number() OVER (ORDER BY key, value) FROM (SELECT key, value, random() FROM append_table) sub ORDER BY 1,2 LIMIT 3;
key | row_number
---------------------------------------------------------------------
abc | 1
abc | 2
bcd | 3
(3 rows)
SELECT key, row_number() OVER (PARTITION BY key ORDER BY key,value) FROM (SELECT key, value, random() FROM append_table) sub ORDER BY 1,2 LIMIT 3;
key | row_number
---------------------------------------------------------------------
abc | 1
abc | 2
bcd | 1
(3 rows)
-- try some joins in subqueries
SELECT key, count(*) FROM (SELECT *, random() FROM append_table a JOIN append_table b USING (key)) u GROUP BY key ORDER BY 1,2 LIMIT 3;
ERROR: the query contains a join that requires repartitioning
HINT: Set citus.enable_repartition_joins to on to enable repartitioning
SELECT key, count(*) FROM (SELECT *, random() FROM append_table a JOIN ref_table b USING (value)) u GROUP BY key ORDER BY 1,2 LIMIT 3;
key | count
---------------------------------------------------------------------
abc | 1
abc | 1
bcd | 2
(3 rows)
SELECT key, value FROM append_table a WHERE value IN (SELECT * FROM ref_table) ORDER BY 1,2;
key | value
---------------------------------------------------------------------
abc | 123
abc | 234
bcd | 123
bcd | 234
cde | 345
efg | 123
efg | 234
hij | 123
hij | 234
(9 rows)
SELECT key, value FROM append_table a WHERE key IN (SELECT key FROM append_table WHERE value > 100) ORDER BY 1,2;
ERROR: complex joins are only supported when all distributed tables are co-located and joined on their distribution columns
SELECT key, value FROM append_table a WHERE value = (SELECT max(value) FROM ref_table) ORDER BY 1,2;
key | value
---------------------------------------------------------------------
cde | 345
(1 row)
SELECT key, value FROM append_table a WHERE value = (SELECT max(value) FROM ref_table r WHERE a.value = r.value) ORDER BY 1,2;
key | value
---------------------------------------------------------------------
abc | 123
abc | 234
bcd | 123
bcd | 234
cde | 345
efg | 123
efg | 234
hij | 123
hij | 234
(9 rows)
SELECT key, (SELECT max(value) FROM ref_table r WHERE r.value = a.value) FROM append_table a ORDER BY 1,2;
key | max
---------------------------------------------------------------------
abc | 123
abc | 234
bcd | 123
bcd | 234
cde | 345
def |
efg | 123
efg | 234
hij | 123
hij | 234
ijk |
jkl |
(12 rows)
-- Test delete
BEGIN;
DELETE FROM append_table a WHERE a.value IN (SELECT s FROM generate_series(1,100) s);
SELECT count(*) FROM append_table;
count
---------------------------------------------------------------------
11
(1 row)
DELETE FROM append_table a USING ref_table r WHERE a.value = r.value;
SELECT count(*) FROM append_table;
count
---------------------------------------------------------------------
2
(1 row)
DELETE FROM append_table WHERE value < 2;
SELECT count(*) FROM append_table;
count
---------------------------------------------------------------------
1
(1 row)
DELETE FROM append_table;
SELECT count(*) FROM append_table;
count
---------------------------------------------------------------------
0
(1 row)
DELETE FROM append_table a USING append_table b WHERE a.key = b.key;
ERROR: complex joins are only supported when all distributed tables are co-located and joined on their distribution columns
END;
-- Test update
BEGIN;
UPDATE append_table a SET extra = 1 WHERE a.value IN (SELECT s FROM generate_series(1,100) s);
SELECT count(*) FROM append_table WHERE extra = 1;
count
---------------------------------------------------------------------
1
(1 row)
UPDATE append_table a SET extra = 1 FROM ref_table r WHERE a.value = r.value;
SELECT count(*) FROM append_table WHERE extra = 1;
count
---------------------------------------------------------------------
10
(1 row)
UPDATE append_table SET extra = 1 WHERE value < 2;
SELECT count(*) FROM append_table WHERE extra = 1;
count
---------------------------------------------------------------------
11
(1 row)
UPDATE append_table SET extra = 1;
SELECT count(*) FROM append_table WHERE extra = 1;
count
---------------------------------------------------------------------
12
(1 row)
UPDATE append_table a sET extra = 1 FROM append_table b WHERE a.key = b.key;
ERROR: complex joins are only supported when all distributed tables are co-located and joined on their distribution columns
END;
DROP SCHEMA subquery_append CASCADE;
NOTICE: drop cascades to 2 other objects
DETAIL: drop cascades to table append_table
drop cascades to table ref_table