SET @start_value = @@global.key_buffer_size;
SELECT @start_value;
@start_value
1048576
'#--------------------FN_DYNVARS_055_01------------------------#'
SET @@global.key_buffer_size = 99;
SET @@global.key_buffer_size = DEFAULT;
ERROR 42000: Variable 'key_buffer_size' doesn't have a default value
'Bug# 34878: This variable has default value according to documentation';
SELECT @@global.key_buffer_size = @min_key_buffer_size;
@@global.key_buffer_size = @min_key_buffer_size
1
'#---------------------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 = @min_key_buffer_size;
SELECT @@global.key_buffer_size= @min_key_buffer_size;
@@global.key_buffer_size= @min_key_buffer_size
1
SET @@global.key_buffer_size = 1800;
Warnings:
Warning	1292	Truncated incorrect key_buffer_size value: '1800'
SELECT @@global.key_buffer_size = @min_key_buffer_size;
@@global.key_buffer_size = @min_key_buffer_size
1
SET @@global.key_buffer_size = 65535;
SELECT @@global.key_buffer_size;
@@global.key_buffer_size
61440
'Bug # 34837: Errors are not coming on assigning invalid values to variable'
'#--------------------FN_DYNVARS_055_04-------------------------#'
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 = 4;
Warnings:
Warning	1292	Truncated incorrect key_buffer_size value: '4'
SELECT @@global.key_buffer_size = @min_key_buffer_size;
@@global.key_buffer_size = @min_key_buffer_size
1
'Bug # 34837: Errors are not coming on assigning invalid values to variable';
SET @@global.key_buffer_size = ON;
ERROR 42000: Incorrect argument type to variable 'key_buffer_size'
SELECT @@global.key_buffer_size = @min_key_buffer_size;
@@global.key_buffer_size = @min_key_buffer_size
1
SET @@global.key_buffer_size = 'test';
ERROR 42000: Incorrect argument type to variable 'key_buffer_size'
SELECT @@global.key_buffer_size = @min_key_buffer_size;
@@global.key_buffer_size = @min_key_buffer_size
1
'#-------------------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
SELECT @@key_buffer_size = @min_key_buffer_size;
@@key_buffer_size = @min_key_buffer_size
1
'#----------------------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;
Warnings:
Warning	1292	Truncated incorrect key_buffer_size value: '1'
SELECT @@global.key_buffer_size = @min_key_buffer_size;
@@global.key_buffer_size = @min_key_buffer_size
1
SET @@global.key_buffer_size = FALSE;
Warnings:
Warning	1438	Cannot drop default keycache
SELECT @@global.key_buffer_size = @min_key_buffer_size;
@@global.key_buffer_size = @min_key_buffer_size
1
'#---------------------FN_DYNVARS_055_08----------------------#'
SET @@global.key_buffer_size = @min_key_buffer_size;
SELECT @@key_buffer_size = @@global.key_buffer_size;
@@key_buffer_size = @@global.key_buffer_size
1
'#---------------------FN_DYNVARS_055_09----------------------#'
SET key_buffer_size = @min_key_buffer_size;
ERROR HY000: Variable 'key_buffer_size' is a GLOBAL variable and should be set with SET GLOBAL
SELECT @@key_buffer_size = @min_key_buffer_size;
@@key_buffer_size = @min_key_buffer_size
1
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;
SELECT @@global.key_buffer_size;
@@global.key_buffer_size
1048576