Current File : //usr/share/mysql-test/suite/sys_vars/inc/max_write_lock_count_basic.inc
############## mysql-test\t\max_write_lock_count_basic.test ###############
# #
# Variable Name: max_write_lock_count #
# Scope: GLOBAL #
# Access Type: Dynamic #
# Data Type: numeric #
# Default Value: 4294967295 #
# Range:1-4294967295 #
# #
# #
# Creation Date: 2008-02-07 #
# Author: Salman #
# #
# Description: Test Cases of Dynamic System Variable max_write_lock_count #
# that checks the behavior of this variable in the following ways#
# * Default Value #
# * Valid & Invalid values #
# * Scope & Access method #
# * Data Integrity #
# #
# Reference: http://dev.mysql.com/doc/refman/5.1/en/ #
# server-system-variables.html #
# #
###############################################################################
--source include/load_sysvars.inc
##########################################
# START OF max_write_lock_count TESTS #
##########################################
#############################################################
# Save initial value #
#############################################################
SET @start_global_value = @@global.max_write_lock_count;
SELECT @start_global_value;
--echo '#--------------------FN_DYNVARS_088_01-------------------------#'
############################################################
# Display the DEFAULT value of max_write_lock_count #
############################################################
SET @@global.max_write_lock_count = 1000;
SET @@global.max_write_lock_count = DEFAULT;
SELECT @@global.max_write_lock_count;
--echo '#--------------------FN_DYNVARS_088_02-------------------------#'
############################################################
# Check the DEFAULT value of max_write_lock_count #
############################################################
SET @@global.max_write_lock_count = DEFAULT;
SELECT @@global.max_write_lock_count = 4294967295;
--echo '#--------------------FN_DYNVARS_088_03-------------------------#'
##############################################################################
# Change the value of max_write_lock_count to a valid value for GLOBAL Scope #
##############################################################################
SET @@global.max_write_lock_count = 1;
SELECT @@global.max_write_lock_count;
SET @@global.max_write_lock_count = 2;
SELECT @@global.max_write_lock_count;
SET @@global.max_write_lock_count = 65536;
SELECT @@global.max_write_lock_count;
SET @@global.max_write_lock_count = 4294967295;
SELECT @@global.max_write_lock_count;
SET @@global.max_write_lock_count = 4294967294;
SELECT @@global.max_write_lock_count;
--echo '#------------------FN_DYNVARS_088_04-----------------------#'
################################################################
# Change the value of max_write_lock_count to an invalid value #
################################################################
SET @@global.max_write_lock_count = -1024;
SELECT @@global.max_write_lock_count;
SET @@global.max_write_lock_count = 4294967296;
SELECT @@global.max_write_lock_count;
SET @@global.max_write_lock_count = -1;
SELECT @@global.max_write_lock_count;
SET @@global.max_write_lock_count = 429496729500;
SELECT @@global.max_write_lock_count;
--Error ER_WRONG_TYPE_FOR_VAR
SET @@global.max_write_lock_count = 65530.34;
SELECT @@global.max_write_lock_count;
--Error ER_WRONG_TYPE_FOR_VAR
SET @@global.max_write_lock_count = test;
SELECT @@global.max_write_lock_count;
--echo '#------------------FN_DYNVARS_088_05-----------------------#'
####################################################################
# Check if the value in GLOBAL Table matches value in variable #
####################################################################
SELECT @@global.max_write_lock_count = VARIABLE_VALUE
FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
WHERE VARIABLE_NAME='max_write_lock_count';
--echo '#------------------FN_DYNVARS_088_06-----------------------#'
####################################################################
# Check if TRUE and FALSE values can be used on variable #
####################################################################
SET @@global.max_write_lock_count = TRUE;
SELECT @@global.max_write_lock_count;
SET @@global.max_write_lock_count = FALSE;
SELECT @@global.max_write_lock_count;
--echo '#---------------------FN_DYNVARS_088_07----------------------#'
#################################################################################
# Check if accessing variable with and without GLOBAL point to same variable #
#################################################################################
SET @@global.max_write_lock_count = 20;
SELECT @@max_write_lock_count = @@global.max_write_lock_count;
--echo '#---------------------FN_DYNVARS_088_08----------------------#'
###############################################################################
# Check if max_write_lock_count can be accessed with and without @@ sign #
###############################################################################
SET @@global.max_write_lock_count = 102;
SELECT @@max_write_lock_count;
--Error ER_UNKNOWN_TABLE
SELECT local.max_write_lock_count;
--Error ER_UNKNOWN_TABLE
SELECT global.max_write_lock_count;
--Error ER_BAD_FIELD_ERROR
SELECT max_write_lock_count = @@global.max_write_lock_count;
####################################
# Restore initial value #
####################################
SET @@global.max_write_lock_count = @start_global_value;
SELECT @@global.max_write_lock_count;
###################################################
# END OF max_write_lock_count TESTS #
###################################################
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