mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 03:52:35 +01:00
422774b40a
Fix order_by_optimizer_innodb and order_by_innodb tests. The problem was that the query could be ran before InnoDB was ready to provide a realistic statistic for #records in the table. It provided a number that was too low, which caused the optimizer to decide that range access plan wasn't advantageous and discard it.
99 lines
2.7 KiB
Text
99 lines
2.7 KiB
Text
--source include/have_innodb.inc
|
|
|
|
--disable_warnings
|
|
drop table if exists t0,t1,t2,t3;
|
|
--enable_warnings
|
|
|
|
--echo #
|
|
--echo # MDEV-6402: Optimizer doesn't choose best execution plan when composite key is used
|
|
--echo #
|
|
create table t0(a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
|
|
create table t1(a int);
|
|
insert into t1 select A.a + B.a* 10 + C.a * 100 from t0 A, t0 B, t0 C;
|
|
|
|
CREATE TABLE t2 (
|
|
pk1 int(11) NOT NULL,
|
|
pk2 int(11) NOT NULL,
|
|
fd5 bigint(20) DEFAULT NULL,
|
|
filler1 char(200),
|
|
filler2 char(200),
|
|
PRIMARY KEY (pk1,pk2),
|
|
UNIQUE KEY ux_pk1_fd5 (pk1,fd5)
|
|
) ENGINE=InnoDB;
|
|
|
|
insert into t2
|
|
select
|
|
round(log(2,t1.a+1)),
|
|
t1.a,
|
|
t1.a,
|
|
REPEAT('filler-data-', 10),
|
|
REPEAT('filler-data-', 10)
|
|
from
|
|
t1;
|
|
|
|
analyze table t2 persistent for all;
|
|
select pk1, count(*) from t2 group by pk1;
|
|
|
|
--echo # The following should use range(ux_pk1_fd5), two key parts (key_len=5+8=13)
|
|
EXPLAIN SELECT * FROM t2 USE INDEX(ux_pk1_fd5) WHERE pk1=9 AND fd5 < 500 ORDER BY fd5 DESC LIMIT 10;
|
|
--echo # This also must use range, not ref. key_len must be 13
|
|
EXPLAIN SELECT * FROM t2 WHERE pk1=9 AND fd5 < 500 ORDER BY fd5 DESC LIMIT 10;
|
|
|
|
drop table t0,t1, t2;
|
|
|
|
--echo #
|
|
--echo # MDEV-6814: Server crashes in calculate_key_len on query with ORDER BY
|
|
--echo #
|
|
CREATE TABLE t1 (f1 INT, f2 INT, f3 INT, KEY(f2),KEY(f2,f1)) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES (1,5,0),(2,6,0);
|
|
SELECT * FROM t1 WHERE f1 < 3 AND f2 IS NULL ORDER BY f1;
|
|
DROP TABLE t1;
|
|
|
|
--echo #
|
|
--echo # MDEV-6796: Unable to skip filesort when using implicit extended key
|
|
--echo #
|
|
|
|
CREATE TABLE t1 (
|
|
pk1 int(11) NOT NULL,
|
|
pk2 varchar(64) NOT NULL,
|
|
col1 varchar(16) DEFAULT NULL,
|
|
PRIMARY KEY (pk1,pk2),
|
|
KEY key1 (pk1,col1)
|
|
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
|
|
|
|
CREATE TABLE t2 (
|
|
pk1 int(11) NOT NULL,
|
|
pk2 varchar(64) NOT NULL,
|
|
col1 varchar(16) DEFAULT NULL,
|
|
PRIMARY KEY (pk1,pk2),
|
|
KEY key1 (pk1,col1,pk2)
|
|
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
|
|
|
|
INSERT INTO `t1` VALUES
|
|
(12321321,'a8f5f167f44f4964e6c998dee827110c','video'),
|
|
(12321321,'d77a17a3659ffa60c54e0ea17b6c6d16','video'),
|
|
(12321321,'wwafdsafdsafads','video'),
|
|
(12321321,'696aa249f0738e8181957dd57c2d7d0b','video-2014-09-23'),
|
|
(12321321,'802f9f29584b486f356693e3aa4ef0af','video=sdsd'),
|
|
(12321321,'2f94543ff74aab82e9a058b4e8316d75','video=sdsdsds'),
|
|
(12321321,'c1316b9df0d203fd1b9035308de52a0a','video=sdsdsdsdsd');
|
|
|
|
insert into t2 select * from t1;
|
|
|
|
--echo # this must not use filesort:
|
|
explain SELECT pk2
|
|
FROM t1 USE INDEX(key1)
|
|
WHERE pk1 = 123
|
|
AND col1 = 'video'
|
|
ORDER BY pk2 DESC LIMIT 21;
|
|
|
|
--echo # this must not use filesort, either:
|
|
explain SELECT pk2
|
|
FROM t2 USE INDEX(key1)
|
|
WHERE pk1 = 123 AND col1 = 'video'
|
|
ORDER BY pk2 DESC LIMIT 21;
|
|
|
|
drop table t1, t2;
|
|
|