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221 lines
6.1 KiB
Text
221 lines
6.1 KiB
Text
#
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# MDEV-6434: Wrong result (extra rows) with ORDER BY, multiple-column index, InnoDB
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#
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CREATE TABLE t1 (a INT, b INT, c INT, d TEXT, KEY idx(a,b,c)) ENGINE=InnoDB
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STATS_PERSISTENT=0;
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INSERT INTO t1 (a,c) VALUES
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(8, 9),(8, 10),(13, 15),(16, 17),(16, 18),(16, 19),(20, 21),
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(20, 22),(20, 24),(20, 25),(20, 26),(20, 27),(20, 28);
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SELECT * FROM t1 WHERE a = 8 AND (b = 1 OR b IS NULL) ORDER BY c;
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a b c d
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8 NULL 9 NULL
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8 NULL 10 NULL
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DROP TABLE t1;
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#
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# MDEV-9457: Poor query plan chosen for ORDER BY query by a recent 10.1
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#
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create table t1 (
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pk int primary key,
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key1 int,
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key2 int,
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col1 char(255),
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key(key1),
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key(key2)
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) engine=innodb stats_persistent=0;
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insert into t1
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select seq,seq,seq,repeat('abcd', 63) from seq_0_to_9999;
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# The following must NOT use 'index' on PK.
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# It should use index_merge(key1,key2) + filesort
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explain
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select *
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from t1
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where key1<3 or key2<3
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order by pk;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index_merge key1,key2 key1,key2 5,5 NULL # Using sort_union(key1,key2); Using where; Using filesort
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explain
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select *
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from t1
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where key1<3 or key2<3;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index_merge key1,key2 key1,key2 5,5 NULL # Using sort_union(key1,key2); Using where
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drop table t1;
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#
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# MDEV-18094: Query with order by limit picking index scan over filesort
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#
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create table t0 (a int);
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INSERT INTO t0 VALUES (0),(0),(0),(0),(2),(0),(0),(1),(1),(0);
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CREATE TABLE t1 (
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a int(11),
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b int(11),
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c int(11),
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KEY a_c (a,c),
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KEY a_b (a,b)
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) ENGINE=InnoDB;
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insert into t1 select A.a , B.a, C.a from t0 A, t0 B, t0 C;
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# should use ref access
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explain select a,b,c from t1 where a=1 and c=2 order by b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref a_c,a_b a_c 10 const,const 20 Using where; Using filesort
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# both should use range access
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explain select a,b,c from t1 where a=1 and c=2 order by b limit 1000;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a_c,a_b a_b 5 NULL 200 Using where
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explain select a,b,c from t1 where a=1 and c=2 order by b limit 2000;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a_c,a_b a_b 5 NULL 200 Using where
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drop table t1,t0;
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# Start of 10.2 tests
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#
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# MDEV-14071: wrong results with orderby_uses_equalities=on
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# (duplicate of MDEV-13994)
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#
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CREATE TABLE t1 (i int, j int, z int,PRIMARY KEY (i,j), KEY (z)) ENGINE=InnoDB
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STATS_PERSISTENT=0;
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CREATE TABLE t2 (i int, j int, PRIMARY KEY (i,j)) ENGINE=InnoDB
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STATS_PERSISTENT=0;
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CREATE TABLE t3 (j int, n varchar(5), PRIMARY KEY (j)) ENGINE=InnoDB
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STATS_PERSISTENT=0;
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INSERT INTO t1 VALUES
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(127,0,1),(188,0,1),(206,0,1),(218,0,1),(292,0,1),(338,0,1),(375,0,1),
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(381,0,1),(409,0,1),(466,0,1),(469,0,1),(498,0,1),(656,0,1);
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INSERT INTO t1 VALUES
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(77,4,0),(86,7,0),(96,6,0),(96,7,0),(99,9,0),(99,10,0),(99,11,0),(104,4,0),
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(106,5,0),(148,6,0),(177,6,0),(181,5,0),(188,8,0),(218,8,0),(253,7,0),
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(268,4,0),(338,4,0),(409,7,0),(466,8,0),(469,8,0),(498,8,0),(656,8,0);
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INSERT INTO t2 VALUES
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(127,7),(188,8),(188,9),(206,6),(218,8),(218,9),(292,7),(338,4),(338,5),
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(375,6),(381,5),(409,7),(409,8),(466,8),(466,9),(469,8),(469,9),(498,8),
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(498,9),(656,8),(656,9);
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INSERT INTO t3 VALUES
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(4,'four'),(5,'five'),(6,'six'),(7,'seven'),(8,'eight'),(9,'nine');
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SET @save_optimizer_switch=@@optimizer_switch;
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SET optimizer_switch='orderby_uses_equalities=off';
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SELECT i,n
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FROM t1 INNER JOIN t2 USING (i,j) LEFT JOIN t3 USING (j)
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WHERE i IN (SELECT i FROM t1 WHERE z=1) AND z=0 ORDER BY i;
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i n
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188 eight
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218 eight
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338 four
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409 seven
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466 eight
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469 eight
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498 eight
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656 eight
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SELECT i,n
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FROM t1 x INNER JOIN t2 USING (i,j) LEFT JOIN t3 USING (j)
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WHERE EXISTS (SELECT * FROM t1 WHERE i=x.i AND z=1) AND z=0 ORDER BY i;
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i n
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188 eight
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218 eight
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338 four
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409 seven
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466 eight
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469 eight
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498 eight
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656 eight
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SET optimizer_switch='orderby_uses_equalities=on';
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SELECT i,n
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FROM t1 INNER JOIN t2 USING (i,j) LEFT JOIN t3 USING (j)
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WHERE i IN (SELECT i FROM t1 WHERE z=1) AND z=0 ORDER BY i;
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i n
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188 eight
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218 eight
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338 four
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409 seven
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466 eight
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469 eight
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498 eight
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656 eight
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SELECT i,n
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FROM t1 x INNER JOIN t2 USING (i,j) LEFT JOIN t3 USING (j)
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WHERE EXISTS (SELECT * FROM t1 WHERE i=x.i AND z=1) AND z=0 ORDER BY i;
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i n
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188 eight
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218 eight
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338 four
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409 seven
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466 eight
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469 eight
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498 eight
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656 eight
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set optimizer_switch= @save_optimizer_switch;
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DROP TABLE t1,t2,t3;
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#
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# MDEV-25858: Query results are incorrect when indexes are added
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#
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CREATE TABLE t1 (id int NOT NULL PRIMARY KEY) engine=innodb
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STATS_PERSISTENT=0;
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insert into t1 values (1),(2),(3);
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CREATE TABLE t2 (
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id int NOT NULL PRIMARY KEY,
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id2 int NOT NULL,
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d1 datetime,
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d2 timestamp NOT NULL,
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KEY id2 (id2)
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) engine=innodb stats_persistent=0;
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insert into t2 values
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(1,2,'2019-03-05 00:00:00','2019-03-06 00:00:00'),
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(2,3,'2019-03-05 00:00:00','2019-03-06 00:00:00'),
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(3,3,'2019-03-06 00:00:00','2019-03-05 00:00:00');
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select
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t1.id,t2.id
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from
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t1 left join
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t2 on t2.id2 = t1.id and
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t2.id = (select dd.id
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from t2 dd
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where
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dd.id2 = t1.id and
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d1 > '2019-02-06 00:00:00'
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order by
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dd.d1 desc, dd.d2 desc, dd.id desc limit 1
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);
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id id
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1 NULL
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2 1
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3 3
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create index for_latest_sort on t2 (d1 desc, d2 desc, id desc);
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select
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t1.id,t2.id
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from
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t1 left join
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t2 on t2.id2 = t1.id and
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t2.id = (select dd.id
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from t2 dd
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where
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dd.id2 = t1.id and
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d1 > '2019-02-06 00:00:00'
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order by
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dd.d1 desc, dd.d2 desc, dd.id desc limit 1
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);
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id id
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1 NULL
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2 1
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3 3
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#
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# MDEV-27270: Wrong query plan with Range Checked for Each Record and ORDER BY ... LIMIT
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#
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# This must NOT have "Range checked for each record" without any
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# provisions to produce rows in the required ordering:
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explain
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select
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t1.id,t2.id
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from
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t1 left join
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t2 on t2.id2 = t1.id and
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t2.id = (select dd.id
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from t2 dd
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where
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dd.id2 = t1.id and
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d1 > '2019-02-06 00:00:00'
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order by
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dd.d1, dd.d2, dd.id limit 1
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);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 index NULL PRIMARY 4 NULL # Using index
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1 PRIMARY t2 eq_ref PRIMARY,id2 PRIMARY 4 func # Using where
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2 DEPENDENT SUBQUERY dd range id2,for_latest_sort for_latest_sort 6 NULL # Using where
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drop table t1,t2;
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# End of 10.2 tests
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