--disable_query_log
set @@session.explicit_defaults_for_timestamp=off;
--enable_query_log
#owner: link.zt
#owner group: sql1

--disable_abort_on_error
#
# Test of update and delete with limit
#

--disable_warnings
drop table if exists t1;
--enable_warnings

create table t1(a int primary key,b int);

insert into t1(a) values(1),(2),(3);
select * from t1 limit 0;
select * from t1 limit 1;
select * from t1 limit 3;
select * from t1 limit 4;

# netsed limit，用来测试limit算子自身的re_est_cost(...)函数
select /*+no_rewrite*/ * from (select * from t1 order by b limit 4) AS t2 limit 2;

#--error 1146
select * from t1 limit -1;

drop table t1;


create table t1 (a int primary key,b int);
insert into t1(a) values (1),(2),(3),(4),(5),(6),(7);
select * FROM t1  ORDER BY a desc LIMIT 3;
select * FROM t1  ORDER BY a desc LIMIT 0;
select * FROM t1  ORDER BY a desc LIMIT 8;
select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
drop table t1;