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Further improve jsonb_sqljson parallel test
Instead of using a very large table, use some settings to encourage use of parallelism. Also, drop the table so it doesn't upset the recovery test. per suggestion from Andres Freund Discussion: https://postgr.es/m/20220406022118.3ocqvhxr6kciw5am@alap3.anarazel.de
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@ -2090,7 +2090,13 @@ LINE 1: SELECT * FROM JSON_TABLE(jsonb '{"a": 123}', '$' || '.' || '...
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-- Test parallel JSON_VALUE()
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CREATE UNLOGGED TABLE test_parallel_jsonb_value AS
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SELECT i::text::jsonb AS js
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FROM generate_series(1, 500000) i;
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FROM generate_series(1, 50000) i;
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-- encourage use of parallel plans
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set parallel_setup_cost=0;
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set parallel_tuple_cost=0;
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set min_parallel_table_scan_size=0;
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set max_parallel_workers_per_gather=4;
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set parallel_leader_participation = off;
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-- Should be non-parallel due to subtransactions
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EXPLAIN (COSTS OFF)
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SELECT sum(JSON_VALUE(js, '$' RETURNING numeric)) FROM test_parallel_jsonb_value;
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@ -2101,9 +2107,9 @@ SELECT sum(JSON_VALUE(js, '$' RETURNING numeric)) FROM test_parallel_jsonb_value
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(2 rows)
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SELECT sum(JSON_VALUE(js, '$' RETURNING numeric)) FROM test_parallel_jsonb_value;
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sum
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--------------
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125000250000
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sum
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------------
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1250025000
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(1 row)
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-- Should be parallel
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@ -2113,14 +2119,15 @@ SELECT sum(JSON_VALUE(js, '$' RETURNING numeric ERROR ON ERROR)) FROM test_paral
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------------------------------------------------------------------
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Finalize Aggregate
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-> Gather
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Workers Planned: 2
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Workers Planned: 4
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-> Partial Aggregate
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-> Parallel Seq Scan on test_parallel_jsonb_value
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(5 rows)
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SELECT sum(JSON_VALUE(js, '$' RETURNING numeric ERROR ON ERROR)) FROM test_parallel_jsonb_value;
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sum
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--------------
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125000250000
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sum
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------------
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1250025000
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(1 row)
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DROP TABLE test_parallel_jsonb_value;
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@ -948,9 +948,19 @@ SELECT JSON_QUERY(jsonb '{"a": 123}', 'error' || ' ' || 'error');
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SELECT * FROM JSON_TABLE(jsonb '{"a": 123}', '$' || '.' || 'a' COLUMNS (foo int));
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-- Test parallel JSON_VALUE()
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CREATE UNLOGGED TABLE test_parallel_jsonb_value AS
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SELECT i::text::jsonb AS js
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FROM generate_series(1, 500000) i;
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FROM generate_series(1, 50000) i;
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-- encourage use of parallel plans
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set parallel_setup_cost=0;
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set parallel_tuple_cost=0;
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set min_parallel_table_scan_size=0;
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set max_parallel_workers_per_gather=4;
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set parallel_leader_participation = off;
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-- Should be non-parallel due to subtransactions
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EXPLAIN (COSTS OFF)
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@ -961,3 +971,5 @@ SELECT sum(JSON_VALUE(js, '$' RETURNING numeric)) FROM test_parallel_jsonb_value
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EXPLAIN (COSTS OFF)
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SELECT sum(JSON_VALUE(js, '$' RETURNING numeric ERROR ON ERROR)) FROM test_parallel_jsonb_value;
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SELECT sum(JSON_VALUE(js, '$' RETURNING numeric ERROR ON ERROR)) FROM test_parallel_jsonb_value;
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DROP TABLE test_parallel_jsonb_value;
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