| Server IP : 88.99.149.37 / Your IP : 216.73.216.141 Web Server : nginx/1.31.2 System : Linux server-88-99-149-37 6.12.0-124.56.5.el10_1.x86_64 #1 SMP PREEMPT_DYNAMIC Fri May 15 06:12:08 EDT 2026 x86_64 User : muralimurth ( 1015) PHP Version : 8.4.23 Disable Function : exec,system,passthru,shell_exec,proc_close,proc_open,dl,popen,show_source,posix_kill,posix_mkfifo,posix_getpwuid,posix_setpgid,posix_setsid,posix_setuid,posix_setgid,posix_seteuid,posix_setegid,posix_uname MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /usr/local/mysql/mysql-test/suite/sys_vars/r/ |
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SET @start_global_value = @@global.join_cache_level; show global variables like 'join_cache_level'; Variable_name Value join_cache_level # show session variables like 'join_cache_level'; Variable_name Value join_cache_level # select * from information_schema.global_variables where variable_name='join_cache_level'; VARIABLE_NAME VARIABLE_VALUE JOIN_CACHE_LEVEL # select * from information_schema.session_variables where variable_name='join_cache_level'; VARIABLE_NAME VARIABLE_VALUE JOIN_CACHE_LEVEL # set global join_cache_level=4; select @@global.join_cache_level; @@global.join_cache_level 4 set session join_cache_level=4; select @@session.join_cache_level; @@session.join_cache_level 4 set global join_cache_level=1.1; ERROR 42000: Incorrect argument type to variable 'join_cache_level' set session join_cache_level=1e1; ERROR 42000: Incorrect argument type to variable 'join_cache_level' set global join_cache_level="foo"; ERROR 42000: Incorrect argument type to variable 'join_cache_level' set global join_cache_level=0; select @@global.join_cache_level; @@global.join_cache_level 0 set session join_cache_level=cast(-1 as unsigned int); Warnings: Note 1105 Cast to unsigned converted negative integer to it's positive complement Warning 1292 Truncated incorrect join_cache_level value: '18446744073709551615' select @@session.join_cache_level; @@session.join_cache_level 8 SET @@global.join_cache_level = @start_global_value;