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21 lines
565 B
Plaintext
21 lines
565 B
Plaintext
CREATE TABLE t1(id INT);
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INSERT INTO t1 VALUES (1),(2),(3),(4);
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INSERT INTO t1 SELECT a.id FROM t1 a,t1 b,t1 c,t1 d;
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SET @orig_debug=@@debug;
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SET GLOBAL debug_dbug="d,subselect_exec_fail";
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SELECT SUM(EXISTS(SELECT RAND() FROM t1)) FROM t1;
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SUM(EXISTS(SELECT RAND() FROM t1))
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0
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SELECT REVERSE(EXISTS(SELECT RAND() FROM t1));
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REVERSE(EXISTS(SELECT RAND() FROM t1))
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0
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SET GLOBAL debug_dbug=@orig_debug;
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DROP TABLE t1;
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create table t1 (i int);
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insert into t1 values (1),(2);
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select * from t1 where (i < 200 or i = 300) and i in (select i from t1);
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i
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1
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2
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drop table t1;
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