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drop table if exists t0,t1,t2,t3;
#
# MDEV-6434: Wrong result (extra rows) with ORDER BY, multiple-column index, InnoDB
#
CREATE TABLE t1 (a INT, b INT, c INT, d TEXT, KEY idx(a,b,c)) ENGINE=InnoDB;
INSERT INTO t1 (a,c) VALUES
(8, 9),(8, 10),(13, 15),(16, 17),(16, 18),(16, 19),(20, 21),
(20, 22),(20, 24),(20, 25),(20, 26),(20, 27),(20, 28);
SELECT * FROM t1 WHERE a = 8 AND (b = 1 OR b IS NULL) ORDER BY c;
a b c d
8 NULL 9 NULL
8 NULL 10 NULL
DROP TABLE t1;
#
# MDEV-9457: Poor query plan chosen for ORDER BY query by a recent 10.1
#
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (
pk int primary key,
key1 int,
key2 int,
col1 char(255),
key(key1),
key(key2)
) engine=innodb;
set @a=-1;
insert into t1
select
@a:=@a+1,
@a,
@a,
repeat('abcd', 63)
from t0 A, t0 B, t0 C, t0 D;
# The following must NOT use 'index' on PK.
# It should use index_merge(key1,key2) + filesort
explain
select *
from t1
where key1<3 or key2<3
order by pk;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index_merge key1,key2 key1,key2 5,5 NULL # Using sort_union(key1,key2); Using where; Using filesort
explain
select *
from t1
where key1<3 or key2<3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index_merge key1,key2 key1,key2 5,5 NULL # Using sort_union(key1,key2); Using where
drop table t0, t1;
#
# MDEV-18094: Query with order by limit picking index scan over filesort
#
create table t0 (a int);
INSERT INTO t0 VALUES (0),(0),(0),(0),(2),(0),(0),(1),(1),(0);
CREATE TABLE t1 (
a int(11),
b int(11),
c int(11),
KEY a_c (a,c),
KEY a_b (a,b)
) ENGINE=InnoDB;
insert into t1 select A.a , B.a, C.a from t0 A, t0 B, t0 C;
# should use ref access
explain select a,b,c from t1 where a=1 and c=2 order by b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a_c,a_b a_c 10 const,const 20 Using where; Using filesort
# both should use range access
explain select a,b,c from t1 where a=1 and c=2 order by b limit 1000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a_c,a_b a_b 5 NULL 200 Using where
explain select a,b,c from t1 where a=1 and c=2 order by b limit 2000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range a_c,a_b a_b 5 NULL 200 Using where
drop table t1,t0;
# Start of 10.2 tests
#
# MDEV-14071: wrong results with orderby_uses_equalities=on
# (duplicate of MDEV-13994)
#
CREATE TABLE t1 (i int, j int, z int,PRIMARY KEY (i,j), KEY (z)) ENGINE=InnoDB;
CREATE TABLE t2 (i int, j int, PRIMARY KEY (i,j)) ENGINE=InnoDB;
CREATE TABLE t3 (j int, n varchar(5), PRIMARY KEY (j)) ENGINE=InnoDB;
INSERT INTO t1 VALUES
(127,0,1),(188,0,1),(206,0,1),(218,0,1),(292,0,1),(338,0,1),(375,0,1),
(381,0,1),(409,0,1),(466,0,1),(469,0,1),(498,0,1),(656,0,1);
INSERT INTO t1 VALUES
(77,4,0),(86,7,0),(96,6,0),(96,7,0),(99,9,0),(99,10,0),(99,11,0),(104,4,0),
(106,5,0),(148,6,0),(177,6,0),(181,5,0),(188,8,0),(218,8,0),(253,7,0),
(268,4,0),(338,4,0),(409,7,0),(466,8,0),(469,8,0),(498,8,0),(656,8,0);
INSERT INTO t2 VALUES
(127,7),(188,8),(188,9),(206,6),(218,8),(218,9),(292,7),(338,4),(338,5),
(375,6),(381,5),(409,7),(409,8),(466,8),(466,9),(469,8),(469,9),(498,8),
(498,9),(656,8),(656,9);
INSERT INTO t3 VALUES
(4,'four'),(5,'five'),(6,'six'),(7,'seven'),(8,'eight'),(9,'nine');
SET @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch='orderby_uses_equalities=off';
SELECT i,n
FROM t1 INNER JOIN t2 USING (i,j) LEFT JOIN t3 USING (j)
WHERE i IN (SELECT i FROM t1 WHERE z=1) AND z=0 ORDER BY i;
i n
188 eight
218 eight
338 four
409 seven
466 eight
469 eight
498 eight
656 eight
SELECT i,n
FROM t1 x INNER JOIN t2 USING (i,j) LEFT JOIN t3 USING (j)
WHERE EXISTS (SELECT * FROM t1 WHERE i=x.i AND z=1) AND z=0 ORDER BY i;
i n
188 eight
218 eight
338 four
409 seven
466 eight
469 eight
498 eight
656 eight
SET optimizer_switch='orderby_uses_equalities=on';
SELECT i,n
FROM t1 INNER JOIN t2 USING (i,j) LEFT JOIN t3 USING (j)
WHERE i IN (SELECT i FROM t1 WHERE z=1) AND z=0 ORDER BY i;
i n
188 eight
218 eight
338 four
409 seven
466 eight
469 eight
498 eight
656 eight
SELECT i,n
FROM t1 x INNER JOIN t2 USING (i,j) LEFT JOIN t3 USING (j)
WHERE EXISTS (SELECT * FROM t1 WHERE i=x.i AND z=1) AND z=0 ORDER BY i;
i n
188 eight
218 eight
338 four
409 seven
466 eight
469 eight
498 eight
656 eight
set optimizer_switch= @save_optimizer_switch;
DROP TABLE t1,t2,t3;
# End of 10.2 tests
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