mirror of https://github.com/citusdata/citus.git
507 lines
22 KiB
Plaintext
507 lines
22 KiB
Plaintext
CREATE SCHEMA recurring_join_pushdown;
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SET search_path TO recurring_join_pushdown;
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SET citus.next_shard_id TO 1520000;
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SET citus.shard_count TO 4;
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CREATE TABLE r1(a int, b int);
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SELECT create_reference_table('r1');
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create_reference_table
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---------------------------------------------------------------------
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(1 row)
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INSERT INTO r1 VALUES (1,10), (1,11), (1,20), (2,10), (2,12), (2, 20), (3, 20), (10, 1), (10, 2);
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--- For testing, remove before merge
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CREATE TABLE r1_local(like r1);
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INSERT INTO r1_local select * from r1;
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CREATE TABLE d1(a int, b int);
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SELECT create_distributed_table('d1', 'a');
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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INSERT INTO d1 VALUES (1,10), (1,11), (1,20), (2,10), (2,12), (2, 20), (4, 10);
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--- For testing, remove before merge
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CREATE TABLE d1_local(like d1);
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INSERT INTO d1_local select * from d1;
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SET client_min_messages TO DEBUG3;
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-- Basic test cases
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-- Test that the join is pushed down to the worker nodes, using "using" syntax
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SELECT count(*) FROM r1 LEFT JOIN d1 using (a);
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: a push down safe left join with recurring left side
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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count
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---------------------------------------------------------------------
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21
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(1 row)
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SELECT count(*) FROM r1_local LEFT JOIN d1_local using (a);
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count
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---------------------------------------------------------------------
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21
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(1 row)
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SELECT * FROM r1 LEFT JOIN d1 using (a, b) ORDER BY 1, 2;
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: a push down safe left join with recurring left side
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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a | b
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---------------------------------------------------------------------
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1 | 10
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1 | 11
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1 | 20
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2 | 10
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2 | 12
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2 | 20
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3 | 20
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10 | 1
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10 | 2
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(9 rows)
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SELECT * FROM r1_local LEFT JOIN d1_local using (a, b) ORDER BY 1, 2;
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a | b
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---------------------------------------------------------------------
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1 | 10
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1 | 11
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1 | 20
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2 | 10
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2 | 12
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2 | 20
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3 | 20
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10 | 1
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10 | 2
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(9 rows)
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SET client_min_messages TO DEBUG1;
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-- Test that the join is not pushed down when joined on a non-distributed column
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SELECT count(*) FROM r1 LEFT JOIN d1 USING (b);
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DEBUG: recursively planning right side of the left join since the outer side is a recurring rel and it is not feasible to push down
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DEBUG: recursively planning distributed relation "d1" since it is part of a distributed join node that is outer joined with a recurring rel
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DEBUG: Wrapping relation "d1" to a subquery
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DEBUG: generating subplan XXX_1 for subquery SELECT b FROM recurring_join_pushdown.d1 WHERE true
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DEBUG: Plan XXX query after replacing subqueries and CTEs: SELECT count(*) AS count FROM (recurring_join_pushdown.r1 LEFT JOIN (SELECT NULL::integer AS a, d1_1.b FROM (SELECT intermediate_result.b FROM read_intermediate_result('XXX_1'::text, 'binary'::citus_copy_format) intermediate_result(b integer)) d1_1) d1 USING (b))
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count
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---------------------------------------------------------------------
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16
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(1 row)
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SELECT count(*) FROM r1_local LEFT JOIN d1_local USING (b);
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count
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---------------------------------------------------------------------
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16
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(1 row)
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-- Basic test cases with ON syntax
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-- Test that the join is pushed down to the worker nodes, using "on" syntax
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SET client_min_messages TO DEBUG3;
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SELECT count(*) FROM r1 LEFT JOIN d1 ON r1.a = d1.a;
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: a push down safe left join with recurring left side
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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count
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---------------------------------------------------------------------
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21
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(1 row)
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SELECT count(*) FROM r1_local LEFT JOIN d1_local ON r1_local.a = d1_local.a;
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count
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---------------------------------------------------------------------
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21
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(1 row)
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SELECT * FROM r1 LEFT JOIN d1 ON r1.a = d1.a AND r1.b = d1.b ORDER BY 1, 2;
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: a push down safe left join with recurring left side
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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a | b | a | b
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---------------------------------------------------------------------
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1 | 10 | 1 | 10
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1 | 11 | 1 | 11
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1 | 20 | 1 | 20
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2 | 10 | 2 | 10
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2 | 12 | 2 | 12
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2 | 20 | 2 | 20
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3 | 20 | |
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10 | 1 | |
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10 | 2 | |
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(9 rows)
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SELECT * FROM r1_local LEFT JOIN d1_local ON r1_local.a = d1_local.a AND r1_local.b = d1_local.b ORDER BY 1, 2;
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a | b | a | b
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---------------------------------------------------------------------
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1 | 10 | 1 | 10
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1 | 11 | 1 | 11
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1 | 20 | 1 | 20
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2 | 10 | 2 | 10
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2 | 12 | 2 | 12
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2 | 20 | 2 | 20
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3 | 20 | |
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10 | 1 | |
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10 | 2 | |
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(9 rows)
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SELECT count(*) FROM r1 LEFT JOIN d1 ON r1.b = d1.a;
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: a push down safe left join with recurring left side
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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count
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---------------------------------------------------------------------
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13
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(1 row)
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SELECT count(*) FROM r1_local LEFT JOIN d1_local ON r1_local.b = d1_local.a;
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count
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---------------------------------------------------------------------
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13
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(1 row)
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-- Test that the join is not pushed down when joined on a non-distributed column
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SELECT count(*) FROM r1 LEFT JOIN d1 ON r1.b = d1.b;
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: recursively planning right side of the left join since the outer side is a recurring rel and it is not feasible to push down
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DEBUG: recursively planning distributed relation "d1" since it is part of a distributed join node that is outer joined with a recurring rel
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DEBUG: Wrapping relation "d1" to a subquery
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: generating subplan XXX_1 for subquery SELECT b FROM recurring_join_pushdown.d1 WHERE true
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DEBUG: Plan XXX query after replacing subqueries and CTEs: SELECT count(*) AS count FROM (recurring_join_pushdown.r1 LEFT JOIN (SELECT NULL::integer AS a, d1_1.b FROM (SELECT intermediate_result.b FROM read_intermediate_result('XXX_1'::text, 'binary'::citus_copy_format) intermediate_result(b integer)) d1_1) d1 ON ((r1.b OPERATOR(pg_catalog.=) d1.b)))
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DEBUG: Creating router plan
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count
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---------------------------------------------------------------------
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16
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(1 row)
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SELECT count(*) FROM r1_local LEFT JOIN d1_local ON r1_local.b = d1_local.b;
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count
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---------------------------------------------------------------------
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16
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(1 row)
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SELECT count(*) FROM r1 LEFT JOIN d1 ON r1.a = d1.b;
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: recursively planning right side of the left join since the outer side is a recurring rel and it is not feasible to push down
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DEBUG: recursively planning distributed relation "d1" since it is part of a distributed join node that is outer joined with a recurring rel
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DEBUG: Wrapping relation "d1" to a subquery
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: generating subplan XXX_1 for subquery SELECT b FROM recurring_join_pushdown.d1 WHERE true
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DEBUG: Plan XXX query after replacing subqueries and CTEs: SELECT count(*) AS count FROM (recurring_join_pushdown.r1 LEFT JOIN (SELECT NULL::integer AS a, d1_1.b FROM (SELECT intermediate_result.b FROM read_intermediate_result('XXX_1'::text, 'binary'::citus_copy_format) intermediate_result(b integer)) d1_1) d1 ON ((r1.a OPERATOR(pg_catalog.=) d1.b)))
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DEBUG: Creating router plan
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count
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---------------------------------------------------------------------
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13
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(1 row)
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SELECT count(*) FROM r1_local LEFT JOIN d1_local ON r1_local.a = d1_local.b;
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count
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---------------------------------------------------------------------
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13
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(1 row)
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SET client_min_messages TO DEBUG1;
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-- Test that the join is not pushed down when joined on a distributed column with disjunctive conditions
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SELECT count(*) FROM r1 LEFT JOIN d1 ON r1.a = d1.a OR r1.b = d1.b;
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DEBUG: recursively planning right side of the left join since the outer side is a recurring rel and it is not feasible to push down
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DEBUG: recursively planning distributed relation "d1" since it is part of a distributed join node that is outer joined with a recurring rel
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DEBUG: Wrapping relation "d1" to a subquery
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DEBUG: generating subplan XXX_1 for subquery SELECT a, b FROM recurring_join_pushdown.d1 WHERE true
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DEBUG: Plan XXX query after replacing subqueries and CTEs: SELECT count(*) AS count FROM (recurring_join_pushdown.r1 LEFT JOIN (SELECT d1_1.a, d1_1.b FROM (SELECT intermediate_result.a, intermediate_result.b FROM read_intermediate_result('XXX_1'::text, 'binary'::citus_copy_format) intermediate_result(a integer, b integer)) d1_1) d1 ON (((r1.a OPERATOR(pg_catalog.=) d1.a) OR (r1.b OPERATOR(pg_catalog.=) d1.b))))
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count
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---------------------------------------------------------------------
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28
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(1 row)
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SELECT count(*) FROM r1_local LEFT JOIN d1_local ON r1_local.a = d1_local.a OR r1_local.b = d1_local.b;
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count
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---------------------------------------------------------------------
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28
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(1 row)
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-- Test join pushdown behavior when the inner part of the join is a subquery
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-- Using 'using' syntax
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SET client_min_messages TO DEBUG3;
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SELECT count(*) FROM r1 LEFT JOIN (SELECT * FROM d1) USING (a);
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: a push down safe left join with recurring left side
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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count
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---------------------------------------------------------------------
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21
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(1 row)
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SELECT count(*) FROM r1_local LEFT JOIN (SELECT * FROM d1_local) USING (a);
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count
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---------------------------------------------------------------------
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21
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(1 row)
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SELECT count(*) FROM r1 LEFT JOIN (SELECT * FROM d1 WHERE a > 1) USING (a);
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: a push down safe left join with recurring left side
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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count
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---------------------------------------------------------------------
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15
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(1 row)
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SELECT count(*) FROM r1_local LEFT JOIN (SELECT * FROM d1_local WHERE a > 1) USING (a);
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count
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---------------------------------------------------------------------
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15
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(1 row)
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SELECT count(*) FROM r1 LEFT JOIN (SELECT * FROM (SELECT * FROM d1) WHERE a > 1) USING (a);
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: a push down safe left join with recurring left side
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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count
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---------------------------------------------------------------------
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15
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(1 row)
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SELECT count(*) FROM r1_local LEFT JOIN (SELECT * FROM (SELECT * FROM d1_local) WHERE a > 1) USING (a);
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count
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---------------------------------------------------------------------
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15
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(1 row)
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SELECT count(*) FROM r1 LEFT JOIN (SELECT * FROM d1 JOIN d1 as d1_1 USING (a)) USING (a);
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: a push down safe left join with recurring left side
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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count
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---------------------------------------------------------------------
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57
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(1 row)
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SELECT count(*) FROM r1_local LEFT JOIN (SELECT * FROM d1_local JOIN d1_local as d1_1 USING (a)) USING (a);
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count
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---------------------------------------------------------------------
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57
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(1 row)
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SELECT count(*) FROM r1 LEFT JOIN (d1 LEFT JOIN d1 as d1_1 USING (a)) USING (a);
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: recursively planning right side of the left join since the outer side is a recurring rel and it is not feasible to push down
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DEBUG: recursively planning distributed relation "d1" since it is part of a distributed join node that is outer joined with a recurring rel
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DEBUG: Wrapping relation "d1" to a subquery
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: generating subplan XXX_1 for subquery SELECT a FROM recurring_join_pushdown.d1 WHERE true
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DEBUG: recursively planning distributed relation "d1" "d1_1" since it is part of a distributed join node that is outer joined with a recurring rel
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DEBUG: Wrapping relation "d1" "d1_1" to a subquery
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: generating subplan XXX_2 for subquery SELECT a FROM recurring_join_pushdown.d1 d1_1 WHERE true
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DEBUG: Plan XXX query after replacing subqueries and CTEs: SELECT count(*) AS count FROM (recurring_join_pushdown.r1 LEFT JOIN ((SELECT d1_2.a, NULL::integer AS b FROM (SELECT intermediate_result.a FROM read_intermediate_result('XXX_1'::text, 'binary'::citus_copy_format) intermediate_result(a integer)) d1_2) d1 LEFT JOIN (SELECT d1_1_1.a, NULL::integer AS b FROM (SELECT intermediate_result.a FROM read_intermediate_result('XXX_2'::text, 'binary'::citus_copy_format) intermediate_result(a integer)) d1_1_1) d1_1 USING (a)) USING (a))
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DEBUG: Creating router plan
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count
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---------------------------------------------------------------------
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57
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(1 row)
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SELECT count(*) FROM r1_local LEFT JOIN (d1_local LEFT JOIN d1_local as d1_1 USING (a)) USING (a);
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count
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---------------------------------------------------------------------
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57
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(1 row)
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-- Using 'on' syntax
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SET client_min_messages TO DEBUG3;
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SELECT count(*) FROM r1 LEFT JOIN (SELECT * FROM d1) AS d1 ON r1.a = d1.a;
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: a push down safe left join with recurring left side
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DEBUG: no shard pruning constraints on d1 found
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DEBUG: shard count after pruning for d1: 4
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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DEBUG: assigned task to node localhost:xxxxx
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count
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---------------------------------------------------------------------
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21
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(1 row)
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SELECT count(*) FROM r1_local LEFT JOIN (SELECT * FROM d1_local) AS d1_local ON r1_local.a = d1_local.a;
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count
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---------------------------------------------------------------------
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21
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|
(1 row)
|
|
|
|
SELECT count(*) FROM r1 LEFT JOIN (SELECT * FROM d1 WHERE a > 1) AS d1 ON r1.a = d1.a;
|
|
DEBUG: no shard pruning constraints on d1 found
|
|
DEBUG: shard count after pruning for d1: 4
|
|
DEBUG: Router planner cannot handle multi-shard select queries
|
|
DEBUG: a push down safe left join with recurring left side
|
|
DEBUG: no shard pruning constraints on d1 found
|
|
DEBUG: shard count after pruning for d1: 4
|
|
DEBUG: assigned task to node localhost:xxxxx
|
|
DEBUG: assigned task to node localhost:xxxxx
|
|
DEBUG: assigned task to node localhost:xxxxx
|
|
DEBUG: assigned task to node localhost:xxxxx
|
|
count
|
|
---------------------------------------------------------------------
|
|
15
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM r1_local LEFT JOIN (SELECT * FROM d1_local WHERE a > 1) AS d1_local ON r1_local.a = d1_local.a;
|
|
count
|
|
---------------------------------------------------------------------
|
|
15
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM r1 LEFT JOIN (SELECT * FROM (SELECT * FROM d1) AS d1 WHERE a > 1) AS d1 ON r1.a = d1.a;
|
|
DEBUG: no shard pruning constraints on d1 found
|
|
DEBUG: shard count after pruning for d1: 4
|
|
DEBUG: Router planner cannot handle multi-shard select queries
|
|
DEBUG: a push down safe left join with recurring left side
|
|
DEBUG: no shard pruning constraints on d1 found
|
|
DEBUG: shard count after pruning for d1: 4
|
|
DEBUG: assigned task to node localhost:xxxxx
|
|
DEBUG: assigned task to node localhost:xxxxx
|
|
DEBUG: assigned task to node localhost:xxxxx
|
|
DEBUG: assigned task to node localhost:xxxxx
|
|
count
|
|
---------------------------------------------------------------------
|
|
15
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM r1_local LEFT JOIN (SELECT * FROM (SELECT * FROM d1_local) AS d1_local WHERE a > 1) AS d1_local ON r1_local.a = d1_local.a;
|
|
count
|
|
---------------------------------------------------------------------
|
|
15
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM r1 LEFT JOIN (SELECT d1.a as a, d1.b, d1_1.a AS a_1 FROM d1 LEFT JOIN d1 as d1_1 ON d1.a = d1_1.a) AS d1_2 ON r1.a = d1_2.a;
|
|
DEBUG: no shard pruning constraints on d1 found
|
|
DEBUG: shard count after pruning for d1: 4
|
|
DEBUG: no shard pruning constraints on d1 found
|
|
DEBUG: shard count after pruning for d1: 4
|
|
DEBUG: Router planner cannot handle multi-shard select queries
|
|
DEBUG: a push down safe left join with recurring left side
|
|
DEBUG: no shard pruning constraints on d1 found
|
|
DEBUG: shard count after pruning for d1: 4
|
|
DEBUG: no shard pruning constraints on d1 found
|
|
DEBUG: shard count after pruning for d1: 4
|
|
DEBUG: assigned task to node localhost:xxxxx
|
|
DEBUG: assigned task to node localhost:xxxxx
|
|
DEBUG: assigned task to node localhost:xxxxx
|
|
DEBUG: assigned task to node localhost:xxxxx
|
|
count
|
|
---------------------------------------------------------------------
|
|
57
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM r1_local LEFT JOIN (SELECT d1_local.a as a, d1_local.b, d1_1.a AS a_1 FROM d1_local LEFT JOIN d1_local as d1_1 ON d1_local.a = d1_1.a) AS d1_2 ON r1_local.a = d1_2.a;
|
|
count
|
|
---------------------------------------------------------------------
|
|
57
|
|
(1 row)
|
|
|