--disable_query_log
set @@session.explicit_defaults_for_timestamp=off;
--enable_query_log
#owner: rkaizhan.dkz
#owner group: sql1
#tags: dml
#description:

--disable_warnings
drop table if exists t;
--enable_warnings
create table t (c1 int primary key, c2 int);

--error 1062
insert into t values(1,2),(3,4),(1,2);

insert into t values(1,2),(3,4),(5,6);
select * from t;

select * from t where c1 in (1,3,1);

select * from t where c1 in (1,1);

drop table t;