SET @start_global_value = @@global.histogram_size;
SET @start_session_value = @@session.histogram_size;
SELECT @start_global_value = @start_session_value;
@start_global_value = @start_session_value
1
'#--------------------FN_DYNVARS_053_01-------------------------#'
SET @@global.histogram_size = DEFAULT;
SELECT @@global.histogram_size;
@@global.histogram_size
254
SET @@session.histogram_size = DEFAULT;
SELECT @@session.histogram_size;
@@session.histogram_size
254
'#--------------------FN_DYNVARS_053_03-------------------------#'
SET @@global.histogram_size = 1;
SELECT @@global.histogram_size;
@@global.histogram_size
1
SET @@global.histogram_size = 31;
SELECT @@global.histogram_size;
@@global.histogram_size
31
SET @@global.histogram_size = 255;
SELECT @@global.histogram_size;
@@global.histogram_size
255
'#--------------------FN_DYNVARS_053_04-------------------------#'
SET @@session.histogram_size = 1;
SELECT @@session.histogram_size;
@@session.histogram_size
1
SET @@session.histogram_size = 31;
SELECT @@session.histogram_size;
@@session.histogram_size
31
SET @@session.histogram_size = 255;
SELECT @@session.histogram_size;
@@session.histogram_size
255
'#------------------FN_DYNVARS_053_05-----------------------#'
SET @@global.histogram_size = -1;
Warnings:
Warning	1292	Truncated incorrect histogram_size value: '-1'
SELECT @@global.histogram_size;
@@global.histogram_size
0
SET @@global.histogram_size = 256;
Warnings:
Warning	1292	Truncated incorrect histogram_size value: '256'
SELECT @@global.histogram_size;
@@global.histogram_size
255
SET @@global.histogram_size = 1024;
Warnings:
Warning	1292	Truncated incorrect histogram_size value: '1024'
SELECT @@global.histogram_size;
@@global.histogram_size
255
SET @@global.histogram_size = 4.5;
ERROR 42000: Incorrect argument type to variable 'histogram_size'
SELECT @@global.histogram_size;
@@global.histogram_size
255
SET @@global.histogram_size = test;
ERROR 42000: Incorrect argument type to variable 'histogram_size'
SELECT @@global.histogram_size;
@@global.histogram_size
255
SET @@session.histogram_size = -1;
Warnings:
Warning	1292	Truncated incorrect histogram_size value: '-1'
SELECT @@session.histogram_size;
@@session.histogram_size
0
SET @@session.histogram_size = 256;
Warnings:
Warning	1292	Truncated incorrect histogram_size value: '256'
SELECT @@session.histogram_size;
@@session.histogram_size
255
SET @@session.histogram_size = 1024;
Warnings:
Warning	1292	Truncated incorrect histogram_size value: '1024'
SELECT @@session.histogram_size;
@@session.histogram_size
255
SET @@session.histogram_size = 4.5;
ERROR 42000: Incorrect argument type to variable 'histogram_size'
SELECT @@session.histogram_size;
@@session.histogram_size
255
SET @@session.histogram_size = test;
ERROR 42000: Incorrect argument type to variable 'histogram_size'
SELECT @@session.histogram_size;
@@session.histogram_size
255
'#------------------FN_DYNVARS_053_06-----------------------#'
SELECT @@global.histogram_size = VARIABLE_VALUE 
FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES 
WHERE VARIABLE_NAME='histogram_size';
@@global.histogram_size = VARIABLE_VALUE
1
'#------------------FN_DYNVARS_053_07-----------------------#'
SELECT @@session.histogram_size = VARIABLE_VALUE 
FROM INFORMATION_SCHEMA.SESSION_VARIABLES
WHERE VARIABLE_NAME='histogram_size';
@@session.histogram_size = VARIABLE_VALUE
1
'#------------------FN_DYNVARS_053_08-----------------------#'
SET @@global.histogram_size = TRUE;
SET @@global.histogram_size = FALSE;
'#---------------------FN_DYNVARS_001_09----------------------#'
SET @@global.histogram_size = 10;
SELECT @@histogram_size = @@global.histogram_size;
@@histogram_size = @@global.histogram_size
0
'#---------------------FN_DYNVARS_001_10----------------------#'
SET @@histogram_size = 100;
SELECT @@histogram_size = @@local.histogram_size;
@@histogram_size = @@local.histogram_size
1
SELECT @@local.histogram_size = @@session.histogram_size;
@@local.histogram_size = @@session.histogram_size
1
SET @@global.histogram_size = @start_global_value;
SET @@session.histogram_size = @start_session_value;