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jeremyhi
764c93bf43
* fix(query): choose bounded CTE as hash join build side Signed-off-by: jeremyhi <fengjiachun@gmail.com> * perf(query): remove join estimate cap * test(compat): accept repartition in analyze plan Signed-off-by: jeremyhi <fengjiachun@gmail.com> --------- Signed-off-by: jeremyhi <fengjiachun@gmail.com>
47 lines
1.4 KiB
SQL
47 lines
1.4 KiB
SQL
-- Regression test for issue 6874: a bounded CTE derived from the same table
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-- must become the hash-join build side in both standalone and distributed mode.
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CREATE TABLE cte_join_logs (
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ts TIMESTAMP TIME INDEX,
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"db" STRING,
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val DOUBLE,
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) WITH (append_mode = 'true');
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INSERT INTO cte_join_logs VALUES
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('2024-01-01 00:00:00', 'a', 1.0),
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('2024-01-01 00:00:01', 'a', 2.0),
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('2024-01-01 00:00:02', 'b', 3.0),
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('2024-01-01 00:00:03', 'b', 4.0),
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('2024-01-01 00:00:04', 'c', 5.0),
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('2024-01-01 00:00:05', 'c', 6.0);
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-- Control: the plain Top-N aggregation should remain below MergeScan.
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-- SQLNESS REPLACE (peers.*) REDACTED
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-- SQLNESS REPLACE (partitioning.*) REDACTED
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EXPLAIN SELECT "db", count(*) AS cnt
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FROM cte_join_logs
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GROUP BY "db"
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ORDER BY cnt DESC
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LIMIT 5;
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-- SQLNESS REPLACE (peers.*) REDACTED
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-- SQLNESS REPLACE (partitioning.*) REDACTED
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EXPLAIN WITH top_dbs AS (
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SELECT "db", count(*) AS cnt FROM cte_join_logs
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GROUP BY "db" ORDER BY cnt DESC LIMIT 5
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)
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SELECT t."db", count(*) AS c
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FROM cte_join_logs AS t
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JOIN top_dbs td ON t."db" = td."db"
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GROUP BY t."db" ORDER BY c DESC, t."db";
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WITH top_dbs AS (
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SELECT "db", count(*) AS cnt FROM cte_join_logs
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GROUP BY "db" ORDER BY cnt DESC LIMIT 5
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)
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SELECT t."db", count(*) AS c
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FROM cte_join_logs AS t
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JOIN top_dbs td ON t."db" = td."db"
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GROUP BY t."db" ORDER BY c DESC, t."db";
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DROP TABLE cte_join_logs;
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