mirror of https://github.com/citusdata/citus.git
61 lines
3.1 KiB
SQL
61 lines
3.1 KiB
SQL
CREATE SCHEMA partition_wise_join;
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SET search_path to partition_wise_join;
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CREATE TABLE partitioning_hash_test(id int, subid int) PARTITION BY HASH(subid);
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CREATE TABLE partitioning_hash_test_0 PARTITION OF partitioning_hash_test FOR VALUES WITH (MODULUS 3, REMAINDER 0);
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CREATE TABLE partitioning_hash_test_1 PARTITION OF partitioning_hash_test FOR VALUES WITH (MODULUS 3, REMAINDER 1);
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INSERT INTO partitioning_hash_test VALUES (1, 2);
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INSERT INTO partitioning_hash_test VALUES (2, 13);
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INSERT INTO partitioning_hash_test VALUES (3, 7);
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INSERT INTO partitioning_hash_test VALUES (4, 4);
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-- distribute partitioned table
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SELECT create_distributed_table('partitioning_hash_test', 'id');
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-- test partition-wise join
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CREATE TABLE partitioning_hash_join_test(id int, subid int) PARTITION BY HASH(subid);
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CREATE TABLE partitioning_hash_join_test_0 PARTITION OF partitioning_hash_join_test FOR VALUES WITH (MODULUS 3, REMAINDER 0);
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CREATE TABLE partitioning_hash_join_test_1 PARTITION OF partitioning_hash_join_test FOR VALUES WITH (MODULUS 3, REMAINDER 1);
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CREATE TABLE partitioning_hash_join_test_2 PARTITION OF partitioning_hash_join_test FOR VALUES WITH (MODULUS 3, REMAINDER 2);
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SELECT create_distributed_table('partitioning_hash_join_test', 'id');
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SELECT success FROM run_command_on_workers('alter system set enable_mergejoin to off');
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SELECT success FROM run_command_on_workers('alter system set enable_nestloop to off');
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SELECT success FROM run_command_on_workers('alter system set enable_indexscan to off');
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SELECT success FROM run_command_on_workers('alter system set enable_indexonlyscan to off');
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SELECT success FROM run_command_on_workers('alter system set enable_partitionwise_join to off');
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SELECT success FROM run_command_on_workers('select pg_reload_conf()');
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EXPLAIN (COSTS OFF)
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SELECT * FROM partitioning_hash_test JOIN partitioning_hash_join_test USING (id, subid);
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-- set partition-wise join on and parallel to off
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SELECT success FROM run_command_on_workers('alter system set enable_partitionwise_join to on');
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SELECT success FROM run_command_on_workers('select pg_reload_conf()');
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-- SET enable_partitionwise_join TO on;
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ANALYZE partitioning_hash_test, partitioning_hash_join_test;
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EXPLAIN (COSTS OFF)
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SELECT * FROM partitioning_hash_test JOIN partitioning_hash_join_test USING (id, subid);
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-- note that partition-wise joins only work when partition key is in the join
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-- following join does not have that, therefore join will not be pushed down to
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-- partitions
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EXPLAIN (COSTS OFF)
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SELECT * FROM partitioning_hash_test JOIN partitioning_hash_join_test USING (id);
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-- reset partition-wise join
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SELECT success FROM run_command_on_workers('alter system reset enable_partitionwise_join');
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SELECT success FROM run_command_on_workers('alter system reset enable_mergejoin');
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SELECT success FROM run_command_on_workers('alter system reset enable_nestloop');
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SELECT success FROM run_command_on_workers('alter system reset enable_indexscan');
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SELECT success FROM run_command_on_workers('alter system reset enable_indexonlyscan');
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SELECT success FROM run_command_on_workers('select pg_reload_conf()');
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RESET enable_partitionwise_join;
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DROP SCHEMA partition_wise_join CASCADE; |