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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.
45 lines
1.6 KiB
Plaintext
45 lines
1.6 KiB
Plaintext
CREATE TABLE t1 (D INT) ENGINE=innodb;
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INSERT INTO t1 VALUES (10);
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ALTER TABLE t1 MODIFY COLUMN d INT;
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ALTER TABLE t1 ADD INDEX my_d (d);
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`d` int(11) DEFAULT NULL,
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KEY `my_d` (`d`)
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) ENGINE=InnoDB DEFAULT CHARSET=latin1
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INSERT INTO t1 VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9);
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INSERT INTO t1 SELECT * FROM t1;
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INSERT INTO t1 SELECT * FROM t1;
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INSERT INTO t1 SELECT * FROM t1;
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INSERT INTO t1 SELECT * FROM t1;
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INSERT INTO t1 SELECT * FROM t1;
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INSERT INTO t1 SELECT * FROM t1;
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INSERT INTO t1 SELECT * FROM t1;
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EXPLAIN SELECT d FROM t1 WHERE d = 5;
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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 my_d my_d 5 const 128 Using index
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EXPLAIN SELECT D FROM t1 WHERE D = 5;
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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 my_d my_d 5 const 128 Using index
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ALTER TABLE t1 DROP INDEX my_d;
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ALTER TABLE t1 MODIFY COLUMN D INT;
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ANALYZE TABLE t1;
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Table Op Msg_type Msg_text
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test.t1 analyze status Engine-independent statistics collected
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test.t1 analyze status OK
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ALTER TABLE t1 ADD INDEX my_d (D);
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EXPLAIN SELECT d FROM t1 WHERE d = 5;
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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 my_d my_d 5 const 128 Using index
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EXPLAIN SELECT D FROM t1 WHERE D = 5;
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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 my_d my_d 5 const 128 Using index
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`D` int(11) DEFAULT NULL,
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KEY `my_d` (`D`)
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) ENGINE=InnoDB DEFAULT CHARSET=latin1
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DROP TABLE t1;
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