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# # 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.