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include/master-slave.inc [connection master] connection master; create table t1(a int , b int invisible); insert into t1 values(1); insert into t1(a,b) values(2,2); select a,b from t1; a b 1 NULL 2 2 desc t1; Field Type Null Key Default Extra a int(11) YES NULL b int(11) YES NULL INVISIBLE create table t2(a int , b int invisible default 5); insert into t2 values(1); insert into t2(a,b) values(2,2); select a,b from t2; a b 1 5 2 2 desc t2; Field Type Null Key Default Extra a int(11) YES NULL b int(11) YES 5 INVISIBLE connection slave; select * from t1; a 1 2 select a,b from t1; a b 1 NULL 2 2 desc t1; Field Type Null Key Default Extra a int(11) YES NULL b int(11) YES NULL INVISIBLE show create table t1; Table Create Table t1 CREATE TABLE `t1` ( `a` int(11) DEFAULT NULL, `b` int(11) INVISIBLE DEFAULT NULL ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci select * from t2; a 1 2 select a,b from t2; a b 1 5 2 2 desc t2; Field Type Null Key Default Extra a int(11) YES NULL b int(11) YES 5 INVISIBLE show create table t2; Table Create Table t2 CREATE TABLE `t2` ( `a` int(11) DEFAULT NULL, `b` int(11) INVISIBLE DEFAULT 5 ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci connection master; drop table t1,t2; include/rpl_end.inc