| Server IP : 45.40.142.9 / Your IP : 216.73.216.250 Web Server : Apache System : Linux s45-40-142-9.secureserver.net 2.6.32-754.35.1.el6.x86_64 #1 SMP Sat Nov 7 12:42:14 UTC 2020 x86_64 User : bayspec ( 506) PHP Version : 5.6.40 Disable Function : NONE MySQL : ON | cURL : ON | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : ON Directory : /usr/share/mysql-test/r/ |
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CREATE TABLE t1(id INT); INSERT INTO t1 VALUES (1),(2),(3),(4); INSERT INTO t1 SELECT a.id FROM t1 a,t1 b,t1 c,t1 d; SET @orig_debug = @@debug; SET SESSION debug="d,subselect_exec_fail"; SELECT SUM(EXISTS(SELECT RAND() FROM t1)) FROM t1; SUM(EXISTS(SELECT RAND() FROM t1)) 0 SELECT REVERSE(EXISTS(SELECT RAND() FROM t1)); REVERSE(EXISTS(SELECT RAND() FROM t1)) 0 SET SESSION debug=@orig_debug; DROP TABLE t1;