SET NDB_EXTRA_LOGGING=1;ERROR HY000: Variable 'ndb_extra_logging' is a GLOBAL variable and should be set with SET GLOBALSET @SAVE_NDB_EXTRA_LOGGING= @@NDB_EXTRA_LOGGING;SET GLOBAL NDB_EXTRA_LOGGING=1;SHOW VARIABLES LIKE 'ndb_extra_logging';Variable_name Valuendb_extra_logging 1SET GLOBAL NDB_EXTRA_LOGGING=0;SHOW VARIABLES LIKE 'ndb_extra_logging';Variable_name Valuendb_extra_logging 0SET @@GLOBAL.NDB_EXTRA_LOGGING= @SAVE_NDB_EXTRA_LOGGING;