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############## mysql-test\t\myisam_stats_method_basic.test #################### # # # Variable Name: myisam_stats_method # # Scope: GLOBAL | SESSION # # Access Type: Dynamic # # Data Type: enumeration # # Default Value: nulls_equal # # Valid Values: nulls_equal, nulls_unequal # # # # # # Creation Date: 2008-02-07 # # Author: Rizwan # # # # Description: Test Cases of Dynamic System Variable myisam_stats_method # # 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 myisam_stats_method TESTS # ######################################################################## ########################################################################### # Saving initial value of myisam_stats_method in a temporary variable # ########################################################################### SET @global_start_value = @@global.myisam_stats_method; SELECT @global_start_value; SET @session_start_value = @@session.myisam_stats_method; SELECT @session_start_value; --echo '#--------------------FN_DYNVARS_097_01------------------------#' ######################################################################## # Display the DEFAULT value of myisam_stats_method # ######################################################################## SET @@global.myisam_stats_method = nulls_equal; SET @@global.myisam_stats_method = DEFAULT; SELECT @@global.myisam_stats_method; SET @@session.myisam_stats_method = nulls_equal; SET @@session.myisam_stats_method = DEFAULT; SELECT @@session.myisam_stats_method; --echo '#---------------------FN_DYNVARS_097_02-------------------------#' ######################################################### # Check if NULL or empty value is accepeted # ######################################################### --Error ER_WRONG_VALUE_FOR_VAR SET @@global.myisam_stats_method = NULL; --Error ER_WRONG_VALUE_FOR_VAR SET @@global.myisam_stats_method = ''; --Error ER_WRONG_VALUE_FOR_VAR SET @@session.myisam_stats_method = NULL; --Error ER_WRONG_VALUE_FOR_VAR SET @@session.myisam_stats_method = ''; --echo '#--------------------FN_DYNVARS_097_03------------------------#' ######################################################################## # Change the value of myisam_stats_method to a valid value # ######################################################################## SET @@global.myisam_stats_method = 'nulls_equal'; SELECT @@global.myisam_stats_method; SET @@global.myisam_stats_method = 'nulls_unequal'; SELECT @@global.myisam_stats_method; SET @@global.myisam_stats_method = 'nulls_ignored'; SELECT @@global.myisam_stats_method; --echo 'Bug: Value of nulls_ignored is not documented. Its ordinal value is 2' SET @@session.myisam_stats_method = 'nulls_equal'; SELECT @@session.myisam_stats_method; SET @@session.myisam_stats_method = 'nulls_unequal'; SELECT @@session.myisam_stats_method; SET @@session.myisam_stats_method = 'nulls_ignored'; SELECT @@session.myisam_stats_method; --echo '#--------------------FN_DYNVARS_097_04-------------------------#' ########################################################################### # Change the value of myisam_stats_method to invalid value # ########################################################################### --Error ER_WRONG_VALUE_FOR_VAR SET @@global.myisam_stats_method = -1; --Error ER_WRONG_VALUE_FOR_VAR SET @@global.myisam_stats_method = unequal; --Error ER_WRONG_VALUE_FOR_VAR SET @@global.myisam_stats_method = ENABLED; --Error ER_WRONG_VALUE_FOR_VAR SET @@global.myisam_stats_method = 'equal'; --Error ER_WRONG_VALUE_FOR_VAR SET @@global.myisam_stats_method = 'null_equal'; --Error ER_WRONG_VALUE_FOR_VAR SET @@global.myisam_stats_method = ' '; --echo '#-------------------FN_DYNVARS_097_05----------------------------#' ######################################################################### # Check if the value in session Table matches value in variable # ######################################################################### --disable_warnings SELECT @@session.myisam_stats_method = VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_VARIABLES WHERE VARIABLE_NAME='myisam_stats_method'; --enable_warnings --echo '#----------------------FN_DYNVARS_097_06------------------------#' ######################################################################### # Check if the value in GLOBAL Table matches value in variable # ######################################################################### --disable_warnings SELECT @@global.myisam_stats_method = VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='myisam_stats_method'; --enable_warnings --echo '#---------------------FN_DYNVARS_097_07-------------------------#' ################################################################### # Check if numbers can be used on variable # ################################################################### # test if variable accepts 0,1,2 SET @@global.myisam_stats_method = 0; SELECT @@global.myisam_stats_method; SET @@global.myisam_stats_method = 1; SELECT @@global.myisam_stats_method; SET @@global.myisam_stats_method = 2; SELECT @@global.myisam_stats_method; # use of decimal values --Error ER_WRONG_TYPE_FOR_VAR SET @@global.myisam_stats_method = 0.4; --Error ER_WRONG_VALUE_FOR_VAR SET @@global.myisam_stats_method = 3; --echo '#---------------------FN_DYNVARS_097_08----------------------#' ################################################################### # Check if TRUE and FALSE values can be used on variable # ################################################################### SET @@global.myisam_stats_method = TRUE; SELECT @@global.myisam_stats_method; SET @@global.myisam_stats_method = FALSE; SELECT @@global.myisam_stats_method; --echo '#---------------------FN_DYNVARS_097_09----------------------#' ######################################################################### # Check if myisam_stats_method can be accessed with and without @@ sign # ######################################################################### SET myisam_stats_method = 'nulls_equal'; --Error ER_PARSE_ERROR SET session.myisam_stats_method = 'nulls_equal'; --Error ER_PARSE_ERROR SET global.myisam_stats_method = 'nulls_equal'; SET session myisam_stats_method = 'nulls_equal'; SELECT @@myisam_stats_method; SET global myisam_stats_method = 'nulls_equal'; SELECT @@global.myisam_stats_method; ############################## # Restore initial value # ############################## SET @@global.myisam_stats_method = @global_start_value; SELECT @@global.myisam_stats_method; SET @@session.myisam_stats_method = @session_start_value; SELECT @@session.myisam_stats_method; ######################################################################## # END OF myisam_stats_method TESTS # ########################################################################