Server IP : 104.21.38.3 / Your IP : 172.69.176.122 Web Server : Apache System : Linux krdc-ubuntu-s-2vcpu-4gb-amd-blr1-01.localdomain 5.15.0-142-generic #152-Ubuntu SMP Mon May 19 10:54:31 UTC 2025 x86_64 User : www ( 1000) PHP Version : 7.4.33 Disable Function : passthru,exec,system,putenv,chroot,chgrp,chown,shell_exec,popen,proc_open,pcntl_exec,ini_alter,ini_restore,dl,openlog,syslog,readlink,symlink,popepassthru,pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,imap_open,apache_setenv MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /www/server/mysql/src/mysql-test/suite/sys_vars/t/ |
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# Test for max_seeks_for_key # --disable_warnings DROP TABLE IF EXISTS t1; --enable_warnings ######################### # Creating new table # ######################### CREATE TABLE t1 (a INT AUTO_INCREMENT PRIMARY KEY, b CHAR(20) ); SET @start_value= @@global.max_seeks_for_key; --echo '#--------------------FN_DYNVARS_084_01-------------------------#' ########################################################## # Test behavior of variable on new connection # 01 # ########################################################## CONNECT (test_con1,localhost,root,,); CONNECTION test_con1; # Value of session & global vairable here should be 10 SELECT @@global.max_seeks_for_key = 10; SELECT @@session.max_seeks_for_key = 10; # Setting global value of variable and inserting data in table SET @@global.max_seeks_for_key = 20; SELECT @@global.max_seeks_for_key; INSERT INTO t1(b) VALUES("AREc"); --replace_column 10 # 11 # EXPLAIN SELECT STRAIGHT_JOIN * FROM t1,t1 AS t2 WHERE t1.b = t2.b; # Setting session value of variable and inserting data in table SET @@session.max_seeks_for_key = 2; SELECT @@session.max_seeks_for_key; INSERT INTO t1(b) VALUES("BREc"); INSERT INTO t1(b) VALUES("CRec"); --replace_column 10 # 11 # EXPLAIN SELECT STRAIGHT_JOIN * FROM t1,t1 AS t2 WHERE t1.b = t2.b; --echo '#--------------------FN_DYNVARS_084_02-------------------------#' ########################################################## # Test behavior of variable on new connection # 02 # ########################################################## CONNECT (test_con2,localhost,root,,); connection test_con2; # Value of session & global vairable here should be 10 SELECT @@global.max_seeks_for_key = 10; SELECT @@session.max_seeks_for_key = 10; # Setting global value of variable and inserting data in table SET @@global.max_seeks_for_key = 20; SELECT @@global.max_seeks_for_key; INSERT INTO t1(b) VALUES("AREc"); --replace_column 10 # 11 # EXPLAIN SELECT STRAIGHT_JOIN * FROM t1,t1 AS t2 WHERE t1.b = t2.b; # Setting session value of variable and inserting data in table SET @@session.max_seeks_for_key = 2; SELECT @@session.max_seeks_for_key; INSERT INTO t1(b) VALUES("BREc"); INSERT INTO t1(b) VALUES("CRec"); --replace_column 10 # 11 # EXPLAIN SELECT STRAIGHT_JOIN * FROM t1,t1 AS t2 WHERE t1.b = t2.b; ###################################################### # Inserting values in table t and analyzing table # ###################################################### INSERT INTO t1 VALUES(null,"test"); INSERT INTO t1 VALUES (null,"a"),(null,"a"),(null,"a"), (null,"a"),(null,"a"),(null,"a"),(null,"a"), (null,"a"),(null,"a"),(null,"a"); --replace_column 10 # 11 # EXPLAIN SELECT STRAIGHT_JOIN * FROM t1,t1 AS t2 WHERE t1.b = t2.b; ANALYZE TABLE t1; ################################################################### # Setting new value for max_seeks_for_key and anaylyzing table # ################################################################### SET MAX_SEEKS_FOR_KEY=1; --replace_column 10 # 11 # EXPLAIN SELECT STRAIGHT_JOIN * FROM t1,t1 AS t2 WHERE t1.b = t2.b; SET MAX_SEEKS_FOR_KEY=DEFAULT; connection default; disconnect test_con1; disconnect test_con2; DROP TABLE t1; SET @@global.max_seeks_for_key= @start_value;