drop function if exists bug23333; drop table if exists t1,t2; CREATE TABLE t1 (a int NOT NULL auto_increment primary key) ENGINE=XEngine; CREATE TABLE t2 (a int NOT NULL auto_increment, b int, PRIMARY KEY (a)) ENGINE=InnoDB; insert into t2 values (1,1); create function bug23333() RETURNS int(11) DETERMINISTIC begin insert into t1 values (null); select count(*) from t1 into @a; return @a; end| Warnings: Warning 1681 Integer display width is deprecated and will be removed in a future release. reset master; insert into t2 values (bug23333(),1); ERROR 23000: Duplicate entry '1' for key 'PRIMARY' include/show_binlog_events.inc select count(*),@a from t1 /* must be 1,1 */; count(*) @a 0 1 drop table t1,t2; drop function if exists bug23333;