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ecc7961140
Trivial batch, using the handler statistics already collected for the slow query log. The reason for the changes in test cases was mainly to change to use select TABLE_SCHEMA ... from information_schema.table_statistics instead of 'show table_statistics' to avoid future changes to test results if we add more columns to table_statistics.
49 lines
2 KiB
Text
49 lines
2 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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FLUSH TABLE_STATISTICS;
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SELECT SUM(id) FROM t1;
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SUM(id)
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55
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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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SELECT PAGES_ACCESSED, PAGES_READ_FROM_DISK FROM INFORMATION_SCHEMA.TABLE_STATISTICS WHERE TABLE_NAME='t1';
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PAGES_ACCESSED PAGES_READ_FROM_DISK
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1 0
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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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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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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 ROWS_INSERTED ROWS_UPDATED ROWS_DELETED KEY_READ_HITS KEY_READ_MISSES PAGES_ACCESSED PAGES_READ_FROM_DISK
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DROP TABLE t2;
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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 ROWS_INSERTED ROWS_UPDATED ROWS_DELETED KEY_READ_HITS KEY_READ_MISSES PAGES_ACCESSED PAGES_READ_FROM_DISK
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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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