set tidb_cost_model_version=1;
CREATE TABLE t1(a INTEGER);
INSERT INTO t1 VALUES(11),(12),(13),(14),(15),(16),(17),(18),(19);
ANALYZE TABLE t1;
CREATE TABLE t2(a INTEGER);
INSERT INTO t2 VALUES(21),(22),(23),(24),(25),(26),(27);
SELECT * FROM t1 LIMIT 6;
a
11
12
13
14
15
16
SELECT * FROM t1 LIMIT 5 OFFSET 1;
a
12
13
14
15
16
(SELECT * FROM t1 LIMIT 7) ORDER BY a DESC LIMIT 4;
a
17
16
15
14
(SELECT * FROM t1 LIMIT 7 OFFSET 1) ORDER BY a DESC LIMIT 4 OFFSET 2;
a
16
15
14
13
(SELECT * FROM t1 ORDER BY a DESC LIMIT 7) ORDER BY a LIMIT 4;
a
13
14
15
16
(SELECT * FROM t1 ORDER BY a DESC LIMIT 7 OFFSET 1) ORDER BY a LIMIT 4 OFFSET 2;
a
14
15
16
17
SELECT * FROM t1 UNION SELECT * FROM t2 order by 1 LIMIT 5 ;
a
11
12
13
14
15
SELECT * FROM t1 UNION SELECT * FROM t2 order by 1 LIMIT 5 OFFSET 6;
a
17
18
19
21
22
SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY a LIMIT 5;
a
11
12
13
14
15
SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY a LIMIT 5 OFFSET 6;
a
17
18
19
21
22
SELECT * FROM t1 UNION ALL SELECT * FROM t2 order by 1 LIMIT 5;
a
11
12
13
14
15
SELECT * FROM t1 UNION ALL SELECT * FROM t2 order by 1 LIMIT 5 OFFSET 6;
a
17
18
19
21
22
SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY a LIMIT 5;
a
11
12
13
14
15
SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY a LIMIT 5 OFFSET 6;
a
17
18
19
21
22
(SELECT * FROM t1 order by 1 LIMIT 5) UNION
SELECT * FROM t2 order by 1
LIMIT 8;
a
11
12
13
14
15
21
22
23
(SELECT * FROM t1 order by 1 LIMIT 5 OFFSET 4) UNION
SELECT * FROM t2 order by 1
LIMIT 8 OFFSET 1;
a
16
17
18
19
21
22
23
24
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION
SELECT * FROM t2 order by 1
LIMIT 8;
a
15
16
17
18
19
21
22
23
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION
SELECT * FROM t2 order by 1
LIMIT 8 OFFSET 1;
a
12
13
14
15
21
22
23
24
(SELECT * FROM t1 order by 1 LIMIT 5) UNION
SELECT * FROM t2
ORDER BY a LIMIT 8;
a
11
12
13
14
15
21
22
23
(SELECT * FROM t1 order by 1 LIMIT 5 OFFSET 4) UNION
SELECT * FROM t2
ORDER BY a LIMIT 8 OFFSET 1;
a
16
17
18
19
21
22
23
24
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION
SELECT * FROM t2
ORDER BY a LIMIT 8;
a
15
16
17
18
19
21
22
23
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION
SELECT * FROM t2
ORDER BY a LIMIT 8 OFFSET 1;
a
12
13
14
15
21
22
23
24
(SELECT * FROM t1 order by 1 LIMIT 5) UNION ALL
SELECT * FROM t2 order by 1
LIMIT 8;
a
11
12
13
14
15
21
22
23
(SELECT * FROM t1 order by 1 LIMIT 5 OFFSET 4) UNION ALL
SELECT * FROM t2 order by 1
LIMIT 8 OFFSET 1;
a
16
17
18
19
21
22
23
24
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION ALL
SELECT * FROM t2 order by 1
LIMIT 8;
a
15
16
17
18
19
21
22
23
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION ALL
SELECT * FROM t2 order by 1
LIMIT 8 OFFSET 1;
a
12
13
14
15
21
22
23
24
(SELECT * FROM t1 order by 1 LIMIT 5) UNION ALL
SELECT * FROM t2
ORDER BY a LIMIT 8;
a
11
12
13
14
15
21
22
23
(SELECT * FROM t1 order by 1 LIMIT 5 OFFSET 4) UNION ALL
SELECT * FROM t2
ORDER BY a LIMIT 8 OFFSET 1;
a
16
17
18
19
21
22
23
24
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION ALL
SELECT * FROM t2
ORDER BY a LIMIT 8;
a
15
16
17
18
19
21
22
23
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION ALL
SELECT * FROM t2
ORDER BY a LIMIT 8 OFFSET 1;
a
12
13
14
15
21
22
23
24
(SELECT * FROM t1 order by 1 LIMIT 5) UNION
(SELECT * FROM t2 order by 1 LIMIT 4)
order by 1 LIMIT 7;
a
11
12
13
14
15
21
22
(SELECT * FROM t1 order by 1 LIMIT 5 OFFSET 4) UNION
(SELECT * FROM t2 order by 1 LIMIT 4 OFFSET 2)
order by 1 LIMIT 7 OFFSET 1;
a
16
17
18
19
23
24
25
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION
(SELECT * FROM t2 ORDER BY a DESC LIMIT 4)
order by 1 LIMIT 7;
a
15
16
17
18
19
24
25
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION
(SELECT * FROM t2 ORDER BY a DESC LIMIT 4 OFFSET 2)
order by 1 LIMIT 7 OFFSET 1;
a
12
13
14
15
22
23
24
(SELECT * FROM t1 order by 1 LIMIT 5) UNION
(SELECT * FROM t2 order by 1 LIMIT 4)
ORDER BY a LIMIT 7;
a
11
12
13
14
15
21
22
(SELECT * FROM t1 order by 1 LIMIT 5 OFFSET 4) UNION
(SELECT * FROM t2 order by 1 LIMIT 4 OFFSET 2)
ORDER BY a LIMIT 7 OFFSET 1;
a
16
17
18
19
23
24
25
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION
(SELECT * FROM t2 ORDER BY a DESC LIMIT 4)
ORDER BY a LIMIT 7;
a
15
16
17
18
19
24
25
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION
(SELECT * FROM t2 ORDER BY a DESC LIMIT 4 OFFSET 2)
ORDER BY a LIMIT 7 OFFSET 1;
a
12
13
14
15
22
23
24
(SELECT * FROM t1 order by 1 LIMIT 5) UNION ALL
(SELECT * FROM t2 order by 1 LIMIT 4)
order by 1 LIMIT 7;
a
11
12
13
14
15
21
22
(SELECT * FROM t1 order by 1 LIMIT 5 OFFSET 4) UNION ALL
(SELECT * FROM t2 order by 1 LIMIT 4 OFFSET 2)
order by 1 LIMIT 7 OFFSET 1;
a
16
17
18
19
23
24
25
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION ALL
(SELECT * FROM t2 ORDER BY a DESC LIMIT 4)
order by 1 LIMIT 7;
a
15
16
17
18
19
24
25
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION ALL
(SELECT * FROM t2 ORDER BY a DESC LIMIT 4 OFFSET 2)
order by 1 LIMIT 7 OFFSET 1;
a
12
13
14
15
22
23
24
(SELECT * FROM t1 order by 1 LIMIT 5) UNION ALL
(SELECT * FROM t2 order by 1 LIMIT 4)
ORDER BY a LIMIT 7;
a
11
12
13
14
15
21
22
(SELECT * FROM t1 order by 1 LIMIT 5 OFFSET 4) UNION ALL
(SELECT * FROM t2 order by 1 LIMIT 4 OFFSET 2)
ORDER BY a LIMIT 7 OFFSET 1;
a
16
17
18
19
23
24
25
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5) UNION ALL
(SELECT * FROM t2 ORDER BY a DESC LIMIT 4)
ORDER BY a LIMIT 7;
a
15
16
17
18
19
24
25
(SELECT * FROM t1 ORDER BY a DESC LIMIT 5 OFFSET 4) UNION ALL
(SELECT * FROM t2 ORDER BY a DESC LIMIT 4 OFFSET 2)
ORDER BY a LIMIT 7 OFFSET 1;
a
12
13
14
15
22
23
24
DROP TABLE t1, t2;
create table t1 (a int not null default 0 primary key, b int not null default 0);
insert into t1 () values ();
		# Testing default 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
0	0
2	1
3	1
4	1
update t1 set b=2 where b=1 limit 2;
select * from t1;
a	b
0	0
2	2
3	2
4	1
update t1 set b=4 where b=1;
select * from t1;
a	b
0	0
2	2
3	2
4	4
delete from t1 where b=2 limit 1;
select * from t1;
a	b
0	0
3	2
4	4
delete from t1 limit 1;
select * from t1;
a	b
3	2
4	4
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
2	0
3	0
4	0
DELETE FROM t1 WHERE id2 = 0 ORDER BY id LIMIT 1;
SELECT * FROM t1;
id	id2
3	0
4	0
DELETE FROM t1 WHERE id2 = 0 ORDER BY id desc LIMIT 1;
SELECT * FROM t1;
id	id2
3	0
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);
analyze table t1;
explain select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
id	estRows	task	access object	operator info
TopN_11	1.00	root		Column#3, offset:0, count:3
└─StreamAgg_30	1.00	root		funcs:count(Column#5)->Column#3
  └─TableReader_31	1.00	root		data:StreamAgg_19
    └─StreamAgg_19	1.00	cop[tikv]		funcs:count(1)->Column#5
      └─Selection_29	7.00	cop[tikv]		gt(limit.t1.a, 0)
        └─TableFullScan_28	7.00	cop[tikv]	table:t1	keep order:false
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	estRows	task	access object	operator info
TopN_11	1.00	root		Column#3, offset:0, count:3
└─StreamAgg_30	1.00	root		funcs:sum(Column#5)->Column#3
  └─TableReader_31	1.00	root		data:StreamAgg_19
    └─StreamAgg_19	1.00	cop[tikv]		funcs:sum(limit.t1.a)->Column#5
      └─Selection_29	7.00	cop[tikv]		gt(limit.t1.a, 0)
        └─TableFullScan_28	7.00	cop[tikv]	table:t1	keep order:false
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=-1;
execute s using @a;
Error 1210: Incorrect arguments to LIMIT
prepare s from "select 1 limit 1, ?";
execute s using @a;
Error 1210: Incorrect arguments to LIMIT
prepare s from "select 1 limit ?, ?";
execute s using @a, @a;
Error 1210: Incorrect arguments to LIMIT
set @a=14632475938453979136;
execute s using @a, @a;
1
set @a=-14632475938453979136;
execute s using @a, @a;
Error 1210: Incorrect arguments to LIMIT
End of 5.0 tests
select 1 as a limit 4294967296,10;
a
End of 5.1 tests
# Bug #28961843: COUNT() WITH LIMIT AND OFFSET RETURNS WRONG RESULT
CREATE TABLE t1 (i INT);
INSERT INTO t1 VALUES (1);
SELECT COUNT(*) FROM t1 LIMIT 1 OFFSET 3;
COUNT(*)
DROP TABLE t1;
#
# Bug #29148115: SIG 6 IN TEMPTABLE::RESULT TEMPTABLE::HANDLER::INDEX_NEXT_CONDITIONAL
#
CREATE TABLE t1 (pk INTEGER PRIMARY KEY);
INSERT INTO t1 VALUES (1);
SELECT t1.pk FROM (SELECT DISTINCT * FROM t1) AS t1 WHERE t1.pk=1 LIMIT 1 OFFSET 2;
pk
DROP TABLE t1;
#
# Bug #29373972: SIG 6 AT HANDLER::START_PSI_BATCH_MODE()
#
CREATE TABLE t1 ( pk INTEGER );
INSERT INTO t1 VALUES (1), (2);
SELECT JSON_OBJECTAGG(NULL, '') FROM t1, t1 AS t2 GROUP BY t1.pk LIMIT 2 OFFSET 5;
Error 3158: JSON documents may not contain NULL member names.
FLUSH TABLES;
DROP TABLE t1;
#
# Bug#29531472: SIG 6 AT JOIN::TEST_SKIP_SORT | SQL_OPTIMIZER.CC
#
CREATE TABLE t1 (
col_int_key INT DEFAULT NULL,
col_varchar_key VARCHAR(1) DEFAULT NULL,
KEY idx_CC_col_int_key (col_int_key),
KEY idx_CC_col_varchar_key (col_varchar_key)
);
INSERT INTO t1 VALUES(1,'A');
SELECT col_varchar_key AS f1
FROM t1
WHERE (col_int_key NOT BETWEEN 10 AND 15 OR col_varchar_key < '2') AND col_int_key IS NULL
GROUP BY f1 LIMIT 100;
f1
EXPLAIN
SELECT col_varchar_key AS f1
FROM t1
WHERE (col_int_key NOT BETWEEN 10 AND 15 OR col_varchar_key < '2') AND col_int_key IS NULL
GROUP BY f1 LIMIT 100;
id	estRows	task	access object	operator info
Limit_11	6.21	root		offset:0, count:100
└─HashAgg_24	6.21	root		group by:limit.t1.col_varchar_key, funcs:firstrow(limit.t1.col_varchar_key)->limit.t1.col_varchar_key
  └─IndexLookUp_25	6.21	root		
    ├─IndexRangeScan_21(Build)	10.00	cop[tikv]	table:t1, index:idx_CC_col_int_key(col_int_key)	range:[NULL,NULL], keep order:false, stats:pseudo
    └─HashAgg_13(Probe)	6.21	cop[tikv]		group by:limit.t1.col_varchar_key, 
      └─Selection_23	7.77	cop[tikv]		or(or(lt(limit.t1.col_int_key, 10), gt(limit.t1.col_int_key, 15)), lt(limit.t1.col_varchar_key, "2"))
        └─TableRowIDScan_22	10.00	cop[tikv]	table:t1	keep order:false, stats:pseudo
DROP TABLE t1;
#
# Bug#30521803: LIMIT CLAUSE OUTSIDE PARENTHESES CAN SUPPRESS ORDERING
#               CLAUSES INSIDE
#
CREATE TEMPORARY TABLE t1 (i INT);
INSERT INTO t1 VALUES (1), (2), (3), (4), (5);
# All 3 queries below should return the same result:
SELECT * FROM (SELECT * FROM t1 ORDER BY i DESC LIMIT 3) AS alias LIMIT 2;
i
5
4
(SELECT * FROM t1 ORDER BY i DESC LIMIT 3) LIMIT 2;
i
5
4
WITH cte AS (SELECT 1) (SELECT * FROM t1 ORDER BY i DESC LIMIT 3) LIMIT 2;
i
5
4
DROP TABLE t1;
#
# Bug#30204811 ASSERTION `SELECT_LIMIT > 0' FAILED AT
#              TEST_IF_SKIP_SORT_ORDER
#
CREATE TABLE a (
col_int int,
col_varchar_255 varchar(255),
pk integer auto_increment  primary key
) ENGINE=myisam;
CREATE TABLE b (
col_varchar_10 varchar(10),
pk integer primary key
) ENGINE=myisam;
SELECT STRAIGHT_JOIN a.pk
FROM a
JOIN b ON a.col_varchar_255 = b.col_varchar_10
WHERE b.pk <= a.col_int
ORDER BY a.pk LIMIT 10;
pk
INSERT INTO a(col_int,col_varchar_255) VALUES (0,""),(1,"");
SELECT STRAIGHT_JOIN a.pk
FROM a
JOIN b ON a.col_varchar_255 = b.col_varchar_10
WHERE b.pk <= a.col_int
ORDER BY a.pk LIMIT 10;
pk
INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
INSERT INTO a(col_int,col_varchar_255) SELECT col_int,col_varchar_255 FROM a;
SELECT STRAIGHT_JOIN a.pk
FROM a
JOIN b ON a.col_varchar_255 = b.col_varchar_10
WHERE b.pk <= a.col_int
ORDER BY a.pk LIMIT 10;
pk
DROP TABLE a;
DROP TABLE b;
# Bug#31667061: Inconsistent behavior of @@SQL_SELECT_LIMIT
#               with prepared statements
CREATE TABLE t1(id INTEGER);
INSERT INTO t1 (id) VALUES (1), (2), (3);
SET @@sql_select_limit=1;
PREPARE stmt FROM "SELECT * FROM t1 WHERE id > ?";
SET @a = 0;
EXECUTE stmt using @a;
id
1
set @@sql_select_limit=2;
EXECUTE stmt using @a;
id
1
2
set @@sql_select_limit=DEFAULT;
EXECUTE stmt USING @a;
id
1
2
3
DEALLOCATE PREPARE stmt;
DROP TABLE t1;
CREATE TABLE t1(id INTEGER, c1 INTEGER, c2 INTEGER, c3 INTEGER);
INSERT INTO t1 VALUES(1,1,1,1),(2,2,2,2),(3,9,9,9),(4,10,10,10),(6,1,2,888);
PREPARE stmt FROM
"(SELECT * FROM t1 order by 1 LIMIT 2) UNION ALL (SELECT * FROM t1 ORDER BY 1) order by 1";
SET @@sql_select_limit=2;
EXECUTE stmt;
id	c1	c2	c3
1	1	1	1
1	1	1	1
SET @@sql_select_limit=DEFAULT;
EXECUTE stmt;
id	c1	c2	c3
1	1	1	1
1	1	1	1
2	2	2	2
2	2	2	2
3	9	9	9
4	10	10	10
6	1	2	888
DEALLOCATE PREPARE stmt;
DROP TABLE t1;