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################# mysql-test\t\net_buffer_length_basic.test ################### # # # Variable Name: net_buffer_length # # Scope: GLOBAL | SESSION # # Access Type: Dynamic # # Data Type: numeric # # Default Value: 16384 # # Range: 1024-1048576 # # # # # # Creation Date: 2008-02-07 # # Author: Salman # # # # Description: Test Cases of Dynamic System Variable net_buffer_length # # 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 net_buffer_length TESTS # ################################################################# ############################################################# # Save initial value # ############################################################# SET @start_global_value = @@global.net_buffer_length; # Due to differences in results of linux and windows #SELECT @start_global_value; # give a known value to @@session.net_buffer_length by assigning to # @@global and setting up a new connection (for deterministic result # file diffing) SET @@global.net_buffer_length = DEFAULT; connect(con1,localhost,root,,); connection con1; --echo '#--------------------FN_DYNVARS_109_01-------------------------#' ################################################################# # Display the DEFAULT value of net_buffer_length # ################################################################# SET @@global.net_buffer_length = 10000; SET @@global.net_buffer_length = DEFAULT; SELECT @@global.net_buffer_length; --Error ER_VARIABLE_IS_READONLY SET @@session.net_buffer_length = 20000; --Error ER_VARIABLE_IS_READONLY SET @@session.net_buffer_length = DEFAULT; SELECT @@session.net_buffer_length; --echo '#--------------------FN_DYNVARS_109_02-------------------------#' ######################################################################## # Check the DEFAULT value of net_buffer_length # ######################################################################## SET @@global.net_buffer_length = DEFAULT; SELECT @@global.net_buffer_length = 16384; --echo '#--------------------FN_DYNVARS_109_03-------------------------#' ########################################################################### # Change the value of net_buffer_length to a valid value for GLOBAL Scope # ########################################################################### SET @@global.net_buffer_length = 1024; SELECT @@global.net_buffer_length; SET @@global.net_buffer_length = 1025; SELECT @@global.net_buffer_length; SET @@global.net_buffer_length = 1048576; SELECT @@global.net_buffer_length; SET @@global.net_buffer_length = 1048575; SELECT @@global.net_buffer_length; SET @@global.net_buffer_length = 65535; SELECT @@global.net_buffer_length; --echo '#--------------------FN_DYNVARS_109_04-------------------------#' ############################################################################ # Change the value of net_buffer_length to a valid value for SESSION Scope # ############################################################################ # SESSION net_buffer_length is now read-only; assignments skipped --echo '#------------------FN_DYNVARS_109_05-----------------------#' ############################################################# # Change the value of net_buffer_length to an invalid value # ############################################################# SET @@global.net_buffer_length = 0; SELECT @@global.net_buffer_length; SET @@global.net_buffer_length = -1024; SELECT @@global.net_buffer_length; SET @@global.net_buffer_length = 1023; SELECT @@global.net_buffer_length; SET @@global.net_buffer_length = 1048577; SELECT @@global.net_buffer_length; SET @@global.net_buffer_length = 104857633; SELECT @@global.net_buffer_length; --Error ER_WRONG_TYPE_FOR_VAR SET @@global.net_buffer_length = 65530.34; SELECT @@global.net_buffer_length; --Error ER_WRONG_TYPE_FOR_VAR SET @@global.net_buffer_length = test; SELECT @@global.net_buffer_length; --Error ER_WRONG_TYPE_FOR_VAR SET @@global.net_buffer_length = ' '; SELECT @@global.net_buffer_length; # SESSION net_buffer_length is now read-only; assignments skipped --Error ER_WRONG_TYPE_FOR_VAR SET @@session.net_buffer_length = test; SELECT @@session.net_buffer_length; --echo '#------------------FN_DYNVARS_109_06-----------------------#' #################################################################### # Check if the value in GLOBAL Table matches value in variable # #################################################################### --disable_warnings SELECT @@global.net_buffer_length = VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='net_buffer_length'; --enable_warnings --echo '#------------------FN_DYNVARS_109_07-----------------------#' #################################################################### # Check if the value in SESSION Table matches value in variable # #################################################################### --disable_warnings SELECT @@session.net_buffer_length = VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_VARIABLES WHERE VARIABLE_NAME='net_buffer_length'; --enable_warnings --echo '#------------------FN_DYNVARS_109_08-----------------------#' #################################################################### # Check if TRUE and FALSE values can be used on variable # #################################################################### SET @@global.net_buffer_length = TRUE; SELECT @@global.net_buffer_length; SET @@global.net_buffer_length = FALSE; SELECT @@global.net_buffer_length; --echo '#---------------------FN_DYNVARS_109_09----------------------#' ################################################################################# # Check if accessing variable with and without GLOBAL point to same variable # ################################################################################# SET @@global.net_buffer_length = 2048; SELECT @@net_buffer_length = @@global.net_buffer_length; --echo '#---------------------FN_DYNVARS_109_10----------------------#' ######################################################################################################## # Check if accessing variable with SESSION,LOCAL and without SCOPE points to same session variable # ######################################################################################################## # SESSION net_buffer_length is now read-only; assignments skipped --echo '#---------------------FN_DYNVARS_109_11----------------------#' ############################################################################ # Check if net_buffer_length can be accessed with and without @@ sign # ############################################################################ # SESSION net_buffer_length is now read-only; assignments skipped SELECT @@net_buffer_length; --Error ER_UNKNOWN_TABLE SELECT local.net_buffer_length; --Error ER_UNKNOWN_TABLE SELECT session.net_buffer_length; --Error ER_BAD_FIELD_ERROR SELECT net_buffer_length = @@session.net_buffer_length; #################################### # Restore initial value # #################################### connection default; SET @@global.net_buffer_length = @start_global_value; # Due to differences in results of linux and windows #SELECT @@global.net_buffer_length; ###################################################### # END OF net_buffer_length TESTS # ######################################################