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9608773f75
This essentially reverts commit 4e89ec6692
and only disables InnoDB persistent statistics for tests where it is
desirable. By design, InnoDB persistent statistics will not be updated
except by ANALYZE TABLE or by STATS_AUTO_RECALC.
The internal transactions that update persistent InnoDB statistics
in background tasks (with innodb_stats_auto_recalc=ON) may cause
nondeterministic query plans or interfere with some tests that deal
with other InnoDB internals, such as the purge of transaction history.
100 lines
3.2 KiB
Text
100 lines
3.2 KiB
Text
SET @save_stats_persistent=@@GLOBAL.innodb_stats_persistent;
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SET GLOBAL innodb_stats_persistent=OFF;
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#
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# MDEV-6402: Optimizer doesn't choose best execution plan when composite key is used
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#
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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(a int);
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insert into t1 select A.a + B.a* 10 + C.a * 100 from t0 A, t0 B, t0 C;
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CREATE TABLE t2 (
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pk1 int(11) NOT NULL,
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pk2 int(11) NOT NULL,
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fd5 bigint(20) DEFAULT NULL,
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filler1 char(200),
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filler2 char(200),
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PRIMARY KEY (pk1,pk2),
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UNIQUE KEY ux_pk1_fd5 (pk1,fd5)
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) ENGINE=InnoDB;
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insert into t2
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select
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round(log(2,t1.a+1)),
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t1.a,
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t1.a,
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REPEAT('filler-data-', 10),
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REPEAT('filler-data-', 10)
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from
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t1;
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select pk1, count(*) from t2 group by pk1;
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pk1 count(*)
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0 1
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1 1
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2 3
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3 6
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4 11
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5 23
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6 45
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7 91
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8 181
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9 362
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10 276
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# The following should use range(ux_pk1_fd5), two key parts (key_len=5+8=13)
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EXPLAIN SELECT * FROM t2 USE INDEX(ux_pk1_fd5) WHERE pk1=9 AND fd5 < 500 ORDER BY fd5 DESC LIMIT 10;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 range ux_pk1_fd5 ux_pk1_fd5 13 NULL 138 Using where
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# This also must use range, not ref. key_len must be 13
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EXPLAIN SELECT * FROM t2 WHERE pk1=9 AND fd5 < 500 ORDER BY fd5 DESC LIMIT 10;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 range PRIMARY,ux_pk1_fd5 ux_pk1_fd5 13 NULL 138 Using where
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drop table t0,t1, t2;
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#
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# MDEV-6814: Server crashes in calculate_key_len on query with ORDER BY
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#
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CREATE TABLE t1 (f1 INT, f2 INT, f3 INT, KEY(f2),KEY(f2,f1)) ENGINE=MyISAM;
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INSERT INTO t1 VALUES (1,5,0),(2,6,0);
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SELECT * FROM t1 WHERE f1 < 3 AND f2 IS NULL ORDER BY f1;
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f1 f2 f3
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DROP TABLE t1;
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#
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# MDEV-6796: Unable to skip filesort when using implicit extended key
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#
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CREATE TABLE t1 (
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pk1 int(11) NOT NULL,
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pk2 varchar(64) NOT NULL,
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col1 varchar(16) DEFAULT NULL,
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PRIMARY KEY (pk1,pk2),
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KEY key1 (pk1,col1)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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CREATE TABLE t2 (
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pk1 int(11) NOT NULL,
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pk2 varchar(64) NOT NULL,
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col1 varchar(16) DEFAULT NULL,
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PRIMARY KEY (pk1,pk2),
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KEY key1 (pk1,col1,pk2)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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INSERT INTO `t1` VALUES
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(12321321,'a8f5f167f44f4964e6c998dee827110c','video'),
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(12321321,'d77a17a3659ffa60c54e0ea17b6c6d16','video'),
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(12321321,'wwafdsafdsafads','video'),
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(12321321,'696aa249f0738e8181957dd57c2d7d0b','video-2014-09-23'),
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(12321321,'802f9f29584b486f356693e3aa4ef0af','video=sdsd'),
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(12321321,'2f94543ff74aab82e9a058b4e8316d75','video=sdsdsds'),
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(12321321,'c1316b9df0d203fd1b9035308de52a0a','video=sdsdsdsdsd');
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insert into t2 select * from t1;
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# this must not use filesort:
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explain SELECT pk2
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FROM t1 USE INDEX(key1)
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WHERE pk1 = 123
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AND col1 = 'video'
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ORDER BY pk2 DESC LIMIT 21;
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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 key1 key1 55 const,const 1 Using where; Using index
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# this must not use filesort, either:
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explain SELECT pk2
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FROM t2 USE INDEX(key1)
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WHERE pk1 = 123 AND col1 = 'video'
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ORDER BY pk2 DESC LIMIT 21;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ref key1 key1 55 const,const 1 Using where; Using index
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drop table t1, t2;
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SET GLOBAL innodb_stats_persistent=@save_stats_persistent;
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