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24 lines
983 B
Text
24 lines
983 B
Text
CREATE TABLE t1 ( a INT NOT NULL, b INT NOT NULL) ;
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INSERT INTO t1 SELECT seq,seq FROM seq_1_to_2097152;
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ALTER TABLE t1 ADD INDEX i1(a);
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DELETE FROM t1 WHERE a > 2000000;
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CREATE TABLE t2 LIKE t1;
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INSERT INTO t2 SELECT * FROM t1;
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SELECT 't2 rows before small delete', COUNT(*) FROM t1;
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t2 rows before small delete COUNT(*)
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t2 rows before small delete 2000000
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DELETE t1,t2 FROM t1,t2 WHERE t1.b=t2.a AND t1.a < 2;
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SELECT 't2 rows after small delete', COUNT(*) FROM t2;
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t2 rows after small delete COUNT(*)
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t2 rows after small delete 1999999
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SELECT 't1 rows after small delete', COUNT(*) FROM t1;
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t1 rows after small delete COUNT(*)
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t1 rows after small delete 1999999
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DELETE t1,t2 FROM t1,t2 WHERE t1.b=t2.a AND t1.a < 100*1000;
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SELECT 't2 rows after big delete', COUNT(*) FROM t2;
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t2 rows after big delete COUNT(*)
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t2 rows after big delete 1900001
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SELECT 't1 rows after big delete', COUNT(*) FROM t1;
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t1 rows after big delete COUNT(*)
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t1 rows after big delete 1900001
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DROP TABLE t1,t2;
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