SET @session_start_value = @@session.timestamp;
'#--------------------FN_DYNVARS_001_01------------------------#'
SET @@timestamp = DEFAULT;
SELECT floor(@@timestamp) = UNIX_TIMESTAMP(), @@timestamp = UNIX_TIMESTAMP(NOW(6));
floor(@@timestamp) = UNIX_TIMESTAMP() @@timestamp = UNIX_TIMESTAMP(NOW(6))
1 1
'#---------------------FN_DYNVARS_001_02-------------------------#'
SET @@global.timestamp = "1000";
ERROR HY000: Variable 'timestamp' is a SESSION variable and can't be used with SET GLOBAL
'#--------------------FN_DYNVARS_001_03------------------------#'
SET @@timestamp = 0;
SELECT floor(@@timestamp) = UNIX_TIMESTAMP(), @@timestamp = UNIX_TIMESTAMP(NOW(6));
floor(@@timestamp) = UNIX_TIMESTAMP() @@timestamp = UNIX_TIMESTAMP(NOW(6))
1 1
'Setting 0 resets timestamp to session default timestamp'
SET @@timestamp = -1000000000;
Warnings:
Warning 1292 Truncated incorrect timestamp value: '-1000000000'
SELECT floor(@@timestamp) = UNIX_TIMESTAMP(), @@timestamp = UNIX_TIMESTAMP(NOW(6));
floor(@@timestamp) = UNIX_TIMESTAMP() @@timestamp = UNIX_TIMESTAMP(NOW(6))
1 1
SET @temp_ts = @@timestamp - @@timestamp;
SELECT @temp_ts;
@temp_ts
0
SET @@timestamp = 1.1;
SELECT @@timestamp;
@@timestamp
1.100000
SET @@timestamp = 9999999999999999999999;
Warnings:
Warning 1292 Truncated incorrect timestamp value: '1e22'
SELECT @@timestamp;
@@timestamp
2147483647.000000
'#--------------------FN_DYNVARS_001_04-------------------------#'
SET @@timestamp = "100";
ERROR 42000: Incorrect argument type to variable 'timestamp'
SET @@timestamp = " ";
ERROR 42000: Incorrect argument type to variable 'timestamp'
'#----------------------FN_DYNVARS_001_06------------------------#'
'#---------------------FN_DYNVARS_001_08-------------------------#'
SET @@timestamp = OFF;
ERROR 42000: Incorrect argument type to variable 'timestamp'
SET @@timestamp = ON;
ERROR 42000: Incorrect argument type to variable 'timestamp'
SET @@timestamp = TRUE;
SELECT @@timestamp;
@@timestamp
1.000000
SET @@timestamp = FALSE;
'#---------------------FN_DYNVARS_001_10----------------------#'
SET @@timestamp = 123456;
SELECT @@timestamp = @@local.timestamp and @@timestamp = @@session.timestamp;
@@timestamp = @@local.timestamp and @@timestamp = @@session.timestamp
1
SET @@timestamp = 654321;
SELECT @@timestamp = @@local.timestamp and @@timestamp = @@session.timestamp;
@@timestamp = @@local.timestamp and @@timestamp = @@session.timestamp
1
'#---------------------FN_DYNVARS_001_11----------------------#'
SET timestamp = 1;
SELECT @@timestamp;
@@timestamp
1.000000
SELECT local.timestamp;
ERROR 42S02: Unknown table 'local' in SELECT
SELECT session.timestamp;
ERROR 42S02: Unknown table 'session' in SELECT
SELECT timestamp = @@session.timestamp;
ERROR 42S22: Unknown column 'timestamp' in 'SELECT'
SET @@timestamp = @session_start_value;