SET @start_value = @@global.connect_timeout;
SELECT @start_value;
@start_value
60
'#--------------------FN_DYNVARS_019_01------------------------#'
SET @@global.connect_timeout = 100;
SET @@global.connect_timeout = DEFAULT;
SELECT @@global.connect_timeout;
@@global.connect_timeout
10
'#---------------------FN_DYNVARS_019_02-------------------------#'
SET @@global.connect_timeout = @start_value;
SELECT @@global.connect_timeout = 5;
@@global.connect_timeout = 5
0
'#--------------------FN_DYNVARS_019_03------------------------#'
SET @@global.connect_timeout = 2;
SELECT @@global.connect_timeout;
@@global.connect_timeout
2
SET @@global.connect_timeout = 10000;
SELECT @@global.connect_timeout;
@@global.connect_timeout
10000
SET @@global.connect_timeout = 21221204;
SELECT @@global.connect_timeout;
@@global.connect_timeout
21221204
'#--------------------FN_DYNVARS_019_04-------------------------#'
SET @@global.connect_timeout = 1;
Warnings:
Warning	1292	Truncated incorrect connect_timeout value: '1'
SELECT @@global.connect_timeout;
@@global.connect_timeout
2
SET @@global.connect_timeout = -1024;
Warnings:
Warning	1292	Truncated incorrect connect_timeout value: '-1024'
SELECT @@global.connect_timeout;
@@global.connect_timeout
2
SET @@global.connect_timeout = 42949672950;
Warnings:
Warning	1292	Truncated incorrect connect_timeout value: '42949672950'
SELECT @@global.connect_timeout;
@@global.connect_timeout
31536000
SET @@global.connect_timeout = 21221204.10;
ERROR 42000: Incorrect argument type to variable 'connect_timeout'
SET @@global.connect_timeout = ON;
ERROR 42000: Incorrect argument type to variable 'connect_timeout'
'#-------------------FN_DYNVARS_019_05----------------------------#'
SET @@session.connect_timeout = 0;
ERROR HY000: Variable 'connect_timeout' is a GLOBAL variable and should be set with SET GLOBAL
SELECT @@session.connect_timeout;
ERROR HY000: Variable 'connect_timeout' is a GLOBAL variable
'#----------------------FN_DYNVARS_019_06------------------------#'
SELECT @@global.connect_timeout = VARIABLE_VALUE 
FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES 
WHERE VARIABLE_NAME='connect_timeout';
@@global.connect_timeout = VARIABLE_VALUE
1
'#---------------------FN_DYNVARS_019_07----------------------#'
SET @@global.connect_timeout = TRUE;
Warnings:
Warning	1292	Truncated incorrect connect_timeout value: '1'
SELECT @@global.connect_timeout;
@@global.connect_timeout
2
SET @@global.connect_timeout = FALSE;
Warnings:
Warning	1292	Truncated incorrect connect_timeout value: '0'
SELECT @@global.connect_timeout;
@@global.connect_timeout
2
'#---------------------FN_DYNVARS_019_08----------------------#'
SET @@global.connect_timeout = 5;
SELECT @@connect_timeout = @@global.connect_timeout;
@@connect_timeout = @@global.connect_timeout
1
'#---------------------FN_DYNVARS_019_09----------------------#'
SET connect_timeout = 1;
ERROR HY000: Variable 'connect_timeout' is a GLOBAL variable and should be set with SET GLOBAL
SELECT global.connect_timeout;
ERROR 42S02: Unknown table 'global' in field list
SELECT connect_timeout = @@session.connect_timeout;
ERROR 42S22: Unknown column 'connect_timeout' in 'field list'
SET @@global.connect_timeout = @start_value;
SELECT @@global.connect_timeout;
@@global.connect_timeout
60