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45 lines
1.2 KiB
SQL
45 lines
1.2 KiB
SQL
DROP TABLE IF EXISTS a;
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DROP TABLE IF EXISTS b;
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DROP TABLE IF EXISTS c;
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DROP TABLE IF EXISTS d;
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CREATE TABLE a (k UInt64, a1 UInt64, a2 String) ENGINE = Memory;
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INSERT INTO a VALUES (1, 1, 'a'), (2, 2, 'b'), (3, 3, 'c');
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CREATE TABLE b (k UInt64, b1 UInt64, b2 String) ENGINE = Memory;
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INSERT INTO b VALUES (1, 1, 'a'), (2, 2, 'b'), (3, 3, 'c');
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CREATE TABLE c (k UInt64, c1 UInt64, c2 String) ENGINE = Memory;
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INSERT INTO c VALUES (1, 1, 'a'), (2, 2, 'b'), (3, 3, 'c');
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CREATE TABLE d (k UInt64, d1 UInt64, d2 String) ENGINE = Memory;
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INSERT INTO d VALUES (1, 1, 'a'), (2, 2, 'b'), (3, 3, 'c');
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SET enable_analyzer = 1;
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SET query_plan_join_swap_table = 'false';
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-- { echoOn }
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EXPLAIN PLAN header = 1
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SELECT count() FROM a JOIN b ON b.b1 = a.a1 JOIN c ON c.c1 = b.b1 JOIN d ON d.d1 = c.c1 GROUP BY a.a2
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;
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EXPLAIN PLAN header = 1
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SELECT a.a2, d.d2 FROM a JOIN b USING (k) JOIN c USING (k) JOIN d USING (k)
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;
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EXPLAIN PLAN header = 1
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SELECT b.bx FROM a
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JOIN (SELECT b1, b2 || 'x' AS bx FROM b ) AS b ON b.b1 = a.a1
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JOIN c ON c.c1 = b.b1
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JOIN (SELECT number AS d1 from numbers(10)) AS d ON d.d1 = c.c1
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WHERE c.c2 != '' ORDER BY a.a2
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;
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-- { echoOff }
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DROP TABLE IF EXISTS a;
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DROP TABLE IF EXISTS b;
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DROP TABLE IF EXISTS c;
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DROP TABLE IF EXISTS d;
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