drop table if exists t1;
create table t1 (a int not null default 0 primary key, b int not null default 0);
insert into t1 () values ();
insert into t1 values (1,1),(2,1),(3,1);
update t1 set a=4 where b=1 limit 1;
select * from t1;
a b 00 41 21 31
update t1 set b=2 where b=1 limit 2;
select * from t1;
a b 00 42 22 31
update t1 set b=4 where b=1;
select * from t1;
a b 00 42 22 34
delete from t1 where b=2 limit 1;
select * from t1;
a b 00 22 34
delete from t1 limit 1;
select * from t1;
a b 22 34
drop table t1;
create table t1 (i int);
insert into t1 (i) values(1),(1),(1);
delete from t1 limit 1;
update t1 set i=2 limit 1;
delete from t1 limit 0;
update t1 set i=3 limit 0;
select * from t1;
i 2 1
drop table t1;
select 0 limit 0; 0
CREATE TABLE t1(id int auto_increment primary key, id2 int, index(id2));
INSERT INTO t1 (id2) values (0),(0),(0);
DELETE FROM t1 WHERE id=1;
INSERT INTO t1 SET id2=0;
SELECT * FROM t1;
id id2 40 20 30
DELETE FROM t1 WHERE id2 = 0 ORDER BY id LIMIT 1;
SELECT * FROM t1;
id id2 40 30
DELETE FROM t1 WHERE id2 = 0 ORDER BY id desc LIMIT 1;
SELECT * FROM t1;
id id2 30
DROP TABLE t1;
create table t1 (a integer);
insert into t1 values (1);
select 1 as a from t1 union all select 1 from dual limit 1;
a 1
(select 1 as a from t1) union all (select 1 from dual) limit 1;
a 1
drop table t1;
create table t1 (a int);
insert into t1 values (1),(2),(3),(4),(5),(6),(7);
explain select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where
select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
c 7
explain select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where
select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
c 28
drop table t1;
prepare s from "select 1 limit ?"; set @a='qwe';
execute s using @a; 1 set @a=-1;
execute s using @a; ERROR HY000: Incorrect arguments to EXECUTE
prepare s from "select 1 limit 1, ?";
execute s using @a; ERROR HY000: Incorrect arguments to EXECUTE
prepare s from "select 1 limit ?, ?";
execute s using @a, @a; ERROR HY000: Incorrect arguments to EXECUTE set @a=14632475938453979136;
execute s using @a, @a; 1 set @a=-14632475938453979136;
execute s using @a, @a; ERROR HY000: Incorrect arguments to EXECUTE
End of 5.0 tests
select 1 as a limit 4294967296,10;
a
CREATE TABLE t1 (a int PRIMARY KEY auto_increment);
INSERT INTO t1 VALUES (),(),(),(),(),(),(),(),(),();
INSERT INTO t1 VALUES (),(),(),(),(),(),(),(),(),();
SELECT a FROM t1 ORDER BY a LIMIT 10 OFFSET 1;
a 2 3 4 5 6 7 8 9 10 11
SELECT a FROM t1 ORDER BY a LIMIT 10 OFFSET 10;
a 11 12 13 14 15 16 17 18 19 20
SELECT a FROM t1 ORDER BY a LIMIT 2 OFFSET 14;
a 15 16
DROP TABLE t1;
End of 5.1 tests
#
# mdev-16235: SELECT over a table with LIMIT 0
#
EXPLAIN
SELECT * FROM mysql.slow_log WHERE sql_text != 'foo' LIMIT 0;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Zero limit
SELECT * FROM mysql.slow_log WHERE sql_text != 'foo' LIMIT 0;
start_time user_host query_time lock_time rows_sent rows_examined db last_insert_id insert_id server_id sql_text thread_id rows_affected
EXPLAIN
SELECT * FROM mysql.help_topic WHERE help_category_id != example LIMIT 0;
id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Zero limit
SELECT * FROM mysql.help_topic WHERE help_category_id != example LIMIT 0;
help_topic_id name help_category_id description example url
End of 5.5 tests
Messung V0.5 in Prozent
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-10-08)
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