MINI MINI MANI MO

#
# Variable name : session_track_state_change
# Scope         : Global & Session
#
# Global - default
SELECT @@global.session_track_state_change;
@@global.session_track_state_change
0
# Session - default
SELECT @@session.session_track_state_change;
@@session.session_track_state_change
0

# via INFORMATION_SCHEMA.GLOBAL_VARIABLES
SELECT * FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME LIKE '%track_state_change%';
VARIABLE_NAME	VARIABLE_VALUE
SESSION_TRACK_STATE_CHANGE	OFF
# via INFORMATION_SCHEMA.SESSION_VARIABLES
SELECT * FROM INFORMATION_SCHEMA.SESSION_VARIABLES WHERE VARIABLE_NAME LIKE '%track_state_change%';
VARIABLE_NAME	VARIABLE_VALUE
SESSION_TRACK_STATE_CHANGE	OFF
SET @global_saved_tmp =  @@global.session_track_state_change;

# Altering global variable's value
SET @@global.session_track_state_change = 0;
SELECT @@global.session_track_state_change;
@@global.session_track_state_change
0
SELECT @@session.session_track_state_change;
@@session.session_track_state_change
0
SET @@global.session_track_state_change = TrUe;
SELECT @@global.session_track_state_change;
@@global.session_track_state_change
1
SELECT @@session.session_track_state_change;
@@session.session_track_state_change
0
SET @@global.session_track_state_change = FaLsE;
SELECT @@global.session_track_state_change;
@@global.session_track_state_change
0
SELECT @@session.session_track_state_change;
@@session.session_track_state_change
0

# Altering session variable's value
SET @@session.session_track_state_change = 0;
SELECT @@global.session_track_state_change;
@@global.session_track_state_change
0
SELECT @@session.session_track_state_change;
@@session.session_track_state_change
0

# Variables' values in a new session.
# Global - expect 0
SELECT @@global.session_track_state_change;
@@global.session_track_state_change
0

# Session - expect 0
SELECT @@session.session_track_state_change;
@@session.session_track_state_change
0

# Switching to the default connection.
SELECT @@global.session_track_state_change;
@@global.session_track_state_change
0
SELECT @@session.session_track_state_change;
@@session.session_track_state_change
0

# Test if DEFAULT is working as expected.
SET @@global.session_track_state_change = DEFAULT;
SET @@session.session_track_state_change = DEFAULT;

# Global - expect 0
SELECT @@global.session_track_state_change;
@@global.session_track_state_change
0
# Session - expect 0
SELECT @@session.session_track_state_change;
@@session.session_track_state_change
0

# Variables' values in a new session (con2).
SELECT @@global.session_track_state_change;
@@global.session_track_state_change
0
SELECT @@session.session_track_state_change;
@@session.session_track_state_change
0

# Altering session should not affect global.
SET @@session.session_track_state_change = FALSE;
SELECT @@global.session_track_state_change;
@@global.session_track_state_change
0
SELECT @@session.session_track_state_change;
@@session.session_track_state_change
0

# Variables' values in a new session (con3).
# Altering global should not affect session.
SET @@global.session_track_state_change = OFF;
SELECT @@global.session_track_state_change;
@@global.session_track_state_change
0
SELECT @@session.session_track_state_change;
@@session.session_track_state_change
0

# Switching to the default connection.
# Restoring the original values.
SET @@global.session_track_state_change = @global_saved_tmp;
# End of tests.