mirror of
https://github.com/MariaDB/server.git
synced 2025-09-06 19:08:06 +03:00
66c14d3a8d
- If select query chooses the index 'b' over clustered index then the issue can happen. Changed the test case to use primary index for the select query.
103 lines
2.4 KiB
Plaintext
103 lines
2.4 KiB
Plaintext
SET GLOBAL innodb_cmp_per_index_enabled=ON;
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SELECT * FROM information_schema.innodb_cmp_per_index;
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CREATE TABLE t (
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a INT,
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b VARCHAR(512),
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c VARCHAR(16),
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PRIMARY KEY (a),
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INDEX (b(512)),
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INDEX (c(16))
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) ENGINE=INNODB KEY_BLOCK_SIZE=2;
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SELECT
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database_name,
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table_name,
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index_name,
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compress_ops,
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compress_ops_ok,
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uncompress_ops
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FROM information_schema.innodb_cmp_per_index
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ORDER BY 1, 2, 3;
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database_name test
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table_name t
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index_name b
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compress_ops 1
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compress_ops_ok 1
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uncompress_ops 0
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database_name test
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table_name t
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index_name c
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compress_ops 1
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compress_ops_ok 1
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uncompress_ops 0
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database_name test
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table_name t
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index_name PRIMARY
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compress_ops 1
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compress_ops_ok 1
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uncompress_ops 0
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BEGIN;
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COMMIT;
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ALTER TABLE t DROP INDEX c;
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GRANT USAGE ON *.* TO 'tuser01'@'localhost' IDENTIFIED BY 'cDJvI9s_Uq';
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FLUSH PRIVILEGES;
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connect con1,localhost,tuser01,cDJvI9s_Uq,;
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connection con1;
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SELECT * FROM information_schema.innodb_cmp_per_index;
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ERROR 42000: Access denied; you need (at least one of) the PROCESS privilege(s) for this operation
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connection default;
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disconnect con1;
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DROP USER 'tuser01'@'localhost';
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SELECT
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database_name,
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table_name,
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index_name,
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CASE WHEN compress_ops=47 and @@innodb_compression_level IN (4,8,9) THEN 65
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ELSE compress_ops END as compress_ops,
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CASE WHEN compress_ops_ok=47 and @@innodb_compression_level IN (4,8,9) THEN 65
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ELSE compress_ops_ok END as compress_ops_ok,
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uncompress_ops
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FROM information_schema.innodb_cmp_per_index
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ORDER BY 1, 2, 3;
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database_name test
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table_name t
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index_name b
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compress_ops 43
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compress_ops_ok 43
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uncompress_ops 0
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database_name test
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table_name t
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index_name PRIMARY
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compress_ops 65
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compress_ops_ok 65
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uncompress_ops 0
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SHOW CREATE TABLE t;
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Table t
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Create Table CREATE TABLE `t` (
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`a` int(11) NOT NULL,
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`b` varchar(512) DEFAULT NULL,
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`c` varchar(16) DEFAULT NULL,
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PRIMARY KEY (`a`),
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KEY `b` (`b`)
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) ENGINE=InnoDB DEFAULT CHARSET=latin1 KEY_BLOCK_SIZE=2
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SET GLOBAL innodb_cmp_per_index_enabled=ON;
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SELECT COUNT(*) FROM t IGNORE INDEX(b);
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COUNT(*) 128
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SELECT
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database_name,
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table_name,
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index_name,
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compress_ops,
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compress_ops_ok,
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CASE WHEN uncompress_ops=6 and @@innodb_compression_level IN (4,8,9) THEN 9
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ELSE uncompress_ops END as uncompress_ops
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FROM information_schema.innodb_cmp_per_index
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ORDER BY 1, 2, 3;
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database_name test
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table_name t
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index_name PRIMARY
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compress_ops 0
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compress_ops_ok 0
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uncompress_ops 4
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DROP TABLE t;
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SET GLOBAL innodb_cmp_per_index_enabled=default;
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