| 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/t/ |
Upload File : |
# Test for max_seeks_for_key #
--source include/default_optimizer_switch.inc
set @@global.optimizer_switch=@@local.optimizer_switch;
set @@global.join_cache_level=@@local.join_cache_level;
--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;
# 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");
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");
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");
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");
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");
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;
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;
SET @@global.optimizer_switch= @save_optimizer_switch;
SET @@global.join_cache_level= �@save_join_cache_level;