SET @start_value = @@global.key_buffer_size; '#--------------------FN_DYNVARS_055_01------------------------#' SET @@global.key_buffer_size = DEFAULT; SELECT @@global.key_buffer_size; @@global.key_buffer_size 8388608 '#---------------------FN_DYNVARS_055_02-------------------------#' SET @@global.key_buffer_size = @start_value; SELECT @@global.key_buffer_size = @start_value; @@global.key_buffer_size = @start_value 1 '#--------------------FN_DYNVARS_055_03------------------------#' SET @@global.key_buffer_size = 65535; Warnings: Warning 1292 Truncated incorrect key_buffer_size value: '65535' SELECT @@global.key_buffer_size; @@global.key_buffer_size 61440 '#--------------------FN_DYNVARS_055_04-------------------------#' SET @@global.key_buffer_size = -1; ERROR HY000: Cannot drop default keycache SET @@global.key_buffer_size = 4; ERROR HY000: Cannot drop default keycache SET @@global.key_buffer_size = 10000.01; ERROR 42000: Incorrect argument type to variable 'key_buffer_size' SELECT @@global.key_buffer_size; @@global.key_buffer_size 61440 SET @@global.key_buffer_size = ON; ERROR 42000: Incorrect argument type to variable 'key_buffer_size' SELECT @@global.key_buffer_size; @@global.key_buffer_size 61440 SET @@global.key_buffer_size = 'test'; ERROR 42000: Incorrect argument type to variable 'key_buffer_size' SELECT @@global.key_buffer_size; @@global.key_buffer_size 61440 '#-------------------FN_DYNVARS_055_05----------------------------#' SET @@session.key_buffer_size = 0; ERROR HY000: Variable 'key_buffer_size' is a GLOBAL variable and should be set with SET GLOBAL '#----------------------FN_DYNVARS_055_06------------------------#' SELECT @@global.key_buffer_size = VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='key_buffer_size'; @@global.key_buffer_size = VARIABLE_VALUE 1 SELECT @@key_buffer_size = VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_VARIABLES WHERE VARIABLE_NAME='key_buffer_size'; @@key_buffer_size = VARIABLE_VALUE 1 '#---------------------FN_DYNVARS_055_07----------------------#' SET @@global.key_buffer_size = TRUE; ERROR HY000: Cannot drop default keycache SET @@global.key_buffer_size = FALSE; ERROR HY000: Cannot drop default keycache '#---------------------FN_DYNVARS_055_08----------------------#' SELECT @@key_buffer_size = @@global.key_buffer_size; @@key_buffer_size = @@global.key_buffer_size 1 '#---------------------FN_DYNVARS_055_09----------------------#' SET key_buffer_size = 8 ; ERROR HY000: Variable 'key_buffer_size' is a GLOBAL variable and should be set with SET GLOBAL SET local.key_buffer_size = 10; ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key_buffer_size = 10' at line 1 SELECT local.key_buffer_size; ERROR 42S02: Unknown table 'local' in field list SET global.key_buffer_size = 10; ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key_buffer_size = 10' at line 1 SELECT global.key_buffer_size; ERROR 42S02: Unknown table 'global' in field list SELECT key_buffer_size = @@session.key_buffer_size; ERROR 42S22: Unknown column 'key_buffer_size' in 'field list' SET @@global.key_buffer_size = @start_value;