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dcbf2823c7
This patch effectively blocks the optimization that uses multiple equalities for ORDER BY to remove tmp table in the case when the first table happens to be the result of materialization of a semi-join nest. Currently there is no code at the execution level that would support the optimization in this case.
110 lines
2.8 KiB
Text
110 lines
2.8 KiB
Text
#
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# ORDER BY handling (e.g. filesort) tests that require innodb
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#
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-- source include/have_innodb.inc
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--disable_warnings
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drop table if exists t0,t1,t2,t3;
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--enable_warnings
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--echo #
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--echo # MDEV-6434: Wrong result (extra rows) with ORDER BY, multiple-column index, InnoDB
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--echo #
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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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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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DROP TABLE t1;
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--echo #
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--echo # MDEV-9457: Poor query plan chosen for ORDER BY query by a recent 10.1
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--echo #
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create table t0 (a int);
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insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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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;
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set @a=-1;
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insert into t1
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select
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@a:=@a+1,
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@a,
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@a,
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repeat('abcd', 63)
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from t0 A, t0 B, t0 C, t0 D;
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--echo # The following must NOT use 'index' on PK.
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--echo # It should use index_merge(key1,key2) + filesort
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--replace_column 9 #
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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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--replace_column 9 #
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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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drop table t0, t1;
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--echo #
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--echo # MDEV-14071: wrong results with orderby_uses_equalities=on
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--echo # (duplicate of MDEV-13994)
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--echo #
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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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CREATE TABLE t2 (i int, j int, PRIMARY KEY (i,j)) ENGINE=InnoDB;
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CREATE TABLE t3 (j int, n varchar(5), PRIMARY KEY (j)) ENGINE=InnoDB;
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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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let $q1=
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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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let $q2=
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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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SET @save_optimizer_switch=@@optimizer_switch;
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SET optimizer_switch='orderby_uses_equalities=off';
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eval $q1;
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eval $q2;
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SET optimizer_switch='orderby_uses_equalities=on';
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eval $q1;
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eval $q2;
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set optimizer_switch= @save_optimizer_switch;
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DROP TABLE t1,t2,t3;
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