SET @start_global_value = @@global.max_sort_length;
SELECT @start_global_value;
@start_global_value
1024
SET @start_session_value = @@session.max_sort_length;
SELECT @start_session_value;
@start_session_value
1024
'#--------------------FN_DYNVARS_084_01-------------------------#'
SET @@global.max_sort_length = 1000;
SET @@global.max_sort_length = DEFAULT;
SELECT @@global.max_sort_length;
@@global.max_sort_length
1024
SET @@session.max_sort_length = 1000;
SET @@session.max_sort_length = DEFAULT;
SELECT @@session.max_sort_length;
@@session.max_sort_length
1024
'#--------------------FN_DYNVARS_084_02-------------------------#'
SET @@global.max_sort_length = DEFAULT;
SELECT @@global.max_sort_length = 1024;
@@global.max_sort_length = 1024
1
SET @@session.max_sort_length = DEFAULT;
SELECT @@session.max_sort_length = 1024;
@@session.max_sort_length = 1024
1
'#--------------------FN_DYNVARS_084_03-------------------------#'
SET @@global.max_sort_length = 4;
SELECT @@global.max_sort_length;
@@global.max_sort_length
4
SET @@global.max_sort_length = 5;
SELECT @@global.max_sort_length;
@@global.max_sort_length
5
SET @@global.max_sort_length = 8388608;
SELECT @@global.max_sort_length;
@@global.max_sort_length
8388608
SET @@global.max_sort_length = 8388607;
SELECT @@global.max_sort_length;
@@global.max_sort_length
8388607
SET @@global.max_sort_length = 65536;
SELECT @@global.max_sort_length;
@@global.max_sort_length
65536
'#--------------------FN_DYNVARS_084_04-------------------------#'
SET @@session.max_sort_length = 4;
SELECT @@session.max_sort_length;
@@session.max_sort_length
4
SET @@session.max_sort_length = 5;
SELECT @@session.max_sort_length;
@@session.max_sort_length
5
SET @@session.max_sort_length = 8388608;
SELECT @@session.max_sort_length;
@@session.max_sort_length
8388608
SET @@session.max_sort_length = 8388607;
SELECT @@session.max_sort_length;
@@session.max_sort_length
8388607
SET @@session.max_sort_length = 65536;
SELECT @@session.max_sort_length;
@@session.max_sort_length
65536
'#------------------FN_DYNVARS_084_05-----------------------#'
SET @@global.max_sort_length = -1024;
Warnings:
Warning	1292	Truncated incorrect max_sort_length value: '0'
SELECT @@global.max_sort_length;
@@global.max_sort_length
4
SET @@global.max_sort_length = 3;
Warnings:
Warning	1292	Truncated incorrect max_sort_length value: '3'
SELECT @@global.max_sort_length;
@@global.max_sort_length
4
SET @@global.max_sort_length = 8388609;
Warnings:
Warning	1292	Truncated incorrect max_sort_length value: '8388609'
SELECT @@global.max_sort_length;
@@global.max_sort_length
8388608
SET @@global.max_sort_length = 0;
Warnings:
Warning	1292	Truncated incorrect max_sort_length value: '0'
SELECT @@global.max_sort_length;
@@global.max_sort_length
4
SET @@global.max_sort_length = 65530.34.;
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 '.' at line 1
SELECT @@global.max_sort_length;
@@global.max_sort_length
4
SET @@global.max_sort_length = test;
ERROR 42000: Incorrect argument type to variable 'max_sort_length'
SELECT @@global.max_sort_length;
@@global.max_sort_length
4
SET @@session.max_sort_length = 8388610;
Warnings:
Warning	1292	Truncated incorrect max_sort_length value: '8388610'
SELECT @@session.max_sort_length;
@@session.max_sort_length
8388608
SET @@session.max_sort_length = -1;
Warnings:
Warning	1292	Truncated incorrect max_sort_length value: '0'
SELECT @@session.max_sort_length;
@@session.max_sort_length
4
SET @@session.max_sort_length = 3;
Warnings:
Warning	1292	Truncated incorrect max_sort_length value: '3'
SELECT @@session.max_sort_length;
@@session.max_sort_length
4
SET @@session.max_sort_length = 0;
Warnings:
Warning	1292	Truncated incorrect max_sort_length value: '0'
SELECT @@session.max_sort_length;
@@session.max_sort_length
4
SET @@session.max_sort_length = 65530.34.;
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 '.' at line 1
SET @@session.max_sort_length = 10737418241;
Warnings:
Warning	1292	Truncated incorrect max_sort_length value: '10737418241'
SELECT @@session.max_sort_length;
@@session.max_sort_length
8388608
SET @@session.max_sort_length = test;
ERROR 42000: Incorrect argument type to variable 'max_sort_length'
SELECT @@session.max_sort_length;
@@session.max_sort_length
8388608
'#------------------FN_DYNVARS_084_06-----------------------#'
SELECT @@global.max_sort_length = VARIABLE_VALUE 
FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES 
WHERE VARIABLE_NAME='max_sort_length';
@@global.max_sort_length = VARIABLE_VALUE
1
'#------------------FN_DYNVARS_084_07-----------------------#'
SELECT @@session.max_sort_length = VARIABLE_VALUE 
FROM INFORMATION_SCHEMA.SESSION_VARIABLES 
WHERE VARIABLE_NAME='max_sort_length';
@@session.max_sort_length = VARIABLE_VALUE
1
'#------------------FN_DYNVARS_084_08-----------------------#'
SET @@global.max_sort_length = TRUE;
Warnings:
Warning	1292	Truncated incorrect max_sort_length value: '1'
SELECT @@global.max_sort_length;
@@global.max_sort_length
4
SET @@global.max_sort_length = FALSE;
Warnings:
Warning	1292	Truncated incorrect max_sort_length value: '0'
SELECT @@global.max_sort_length;
@@global.max_sort_length
4
'#---------------------FN_DYNVARS_084_09----------------------#'
SET @@global.max_sort_length = 2048;
SELECT @@max_sort_length = @@global.max_sort_length;
@@max_sort_length = @@global.max_sort_length
0
'#---------------------FN_DYNVARS_084_10----------------------#'
SET @@max_sort_length = 100000;
SELECT @@max_sort_length = @@local.max_sort_length;
@@max_sort_length = @@local.max_sort_length
1
SELECT @@local.max_sort_length = @@session.max_sort_length;
@@local.max_sort_length = @@session.max_sort_length
1
'#---------------------FN_DYNVARS_084_11----------------------#'
SET max_sort_length = 1024;
SELECT @@max_sort_length;
@@max_sort_length
1024
SELECT local.max_sort_length;
ERROR 42S02: Unknown table 'local' in field list
SELECT session.max_sort_length;
ERROR 42S02: Unknown table 'session' in field list
SELECT max_sort_length = @@session.max_sort_length;
ERROR 42S22: Unknown column 'max_sort_length' in 'field list'
SET @@global.max_sort_length = @start_global_value;
SELECT @@global.max_sort_length;
@@global.max_sort_length
1024
SET @@session.max_sort_length = @start_session_value;
SELECT @@session.max_sort_length;
@@session.max_sort_length
1024