mirror of
https://github.com/MariaDB/server.git
synced 2025-01-17 20:42:30 +01:00
48 lines
1.6 KiB
Text
48 lines
1.6 KiB
Text
SET @default_storage_engine_old = @@session.default_storage_engine;
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SET SESSION default_storage_engine = INNODB;
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FLUSH INDEX_STATISTICS;
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FLUSH TABLE_STATISTICS;
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SET @userstat_old= @@userstat;
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SET GLOBAL userstat=ON;
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CREATE TABLE t1 (id int(10), PRIMARY KEY (id));
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INSERT INTO t1 VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
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SELECT COUNT(*) FROM t1;
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COUNT(*)
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10
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SELECT ROWS_READ FROM INFORMATION_SCHEMA.TABLE_STATISTICS WHERE TABLE_NAME='t1';
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ROWS_READ
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10
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SELECT ROWS_READ FROM INFORMATION_SCHEMA.INDEX_STATISTICS WHERE TABLE_NAME='t1';
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ROWS_READ
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10
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FLUSH TABLE_STATISTICS;
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SELECT ROWS_READ FROM INFORMATION_SCHEMA.TABLE_STATISTICS WHERE TABLE_NAME='t1';
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ROWS_READ
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SELECT ROWS_READ FROM INFORMATION_SCHEMA.INDEX_STATISTICS WHERE TABLE_NAME='t1';
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ROWS_READ
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10
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FLUSH INDEX_STATISTICS;
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SELECT ROWS_READ FROM INFORMATION_SCHEMA.INDEX_STATISTICS WHERE TABLE_NAME='t1';
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ROWS_READ
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SELECT COUNT(*) FROM t1;
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COUNT(*)
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10
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SELECT ROWS_READ FROM INFORMATION_SCHEMA.TABLE_STATISTICS WHERE TABLE_NAME='t1';
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ROWS_READ
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10
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SELECT ROWS_READ FROM INFORMATION_SCHEMA.INDEX_STATISTICS WHERE TABLE_NAME='t1';
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ROWS_READ
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10
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DROP TABLE t1;
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CREATE TABLE t2 (c1 INT UNSIGNED);
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ALTER TABLE t2 MODIFY c1 FLOAT;
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SELECT * FROM INFORMATION_SCHEMA.TABLE_STATISTICS WHERE TABLE_NAME='t2';
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TABLE_SCHEMA TABLE_NAME ROWS_READ ROWS_CHANGED ROWS_CHANGED_X_INDEXES
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DROP TABLE t2;
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CREATE TABLE t2 (c1 INT UNSIGNED) ENGINE=InnoDB;
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ALTER TABLE t2 MODIFY c1 FLOAT;
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SELECT * FROM INFORMATION_SCHEMA.TABLE_STATISTICS WHERE TABLE_NAME='t2';
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TABLE_SCHEMA TABLE_NAME ROWS_READ ROWS_CHANGED ROWS_CHANGED_X_INDEXES
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DROP TABLE t2;
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SET GLOBAL userstat= @userstat_old;
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SET SESSION default_storage_engine = @default_storage_engine_old;
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