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############## 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 # #################################################################### --disable_warnings SELECT @@global.max_write_lock_count = VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='max_write_lock_count'; --enable_warnings --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 # ###################################################