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drop table if exists t1;
CREATE TABLE t1 (
gesuchnr int(11) DEFAULT '0' NOT NULL,
benutzer_id int(11) DEFAULT '0' NOT NULL,
PRIMARY KEY (gesuchnr,benutzer_id)
) engine=ISAM;
replace into t1 (gesuchnr,benutzer_id) values (2,1);
replace into t1 (gesuchnr,benutzer_id) values (1,1);
replace into t1 (gesuchnr,benutzer_id) values (1,1);
alter table t1 engine=myisam;
replace into t1 (gesuchnr,benutzer_id) values (1,1);
alter table t1 engine=heap;
replace into t1 (gesuchnr,benutzer_id) values (1,1);
drop table t1;
create table t1 (a tinyint not null auto_increment primary key, b char(20) default "default_value");
insert into t1 values (126,"first"),(63, "middle"),(0,"last");
insert into t1 values (0,"error");
ERROR 23000: Duplicate entry '127' for key 1
replace into t1 values (0,"error");
ERROR 23000: Duplicate entry '127' for key 1
replace into t1 values (126,"first updated");
replace into t1 values (63,default);
select * from t1;
a b
126 first updated
63 default_value
127 last
drop table t1;
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