SET @default_storage_engine_old = @@session.default_storage_engine;
SET SESSION default_storage_engine = TOKUDB;
FLUSH INDEX_STATISTICS;
FLUSH TABLE_STATISTICS;
SET @userstat_old= @@userstat;
SET GLOBAL userstat=ON;
CREATE TABLE t1 (id int(10), a INT, PRIMARY KEY (id));
INSERT INTO t1 VALUES (1, 1), (2, 2), (3, 3), (4, 4), (5, 5);
INSERT INTO t1 VALUES (6, 6), (7, 7), (8, 8), (9, 9), (10, 10);
SELECT MAX(a) FROM t1;
MAX(a)
10
SELECT ROWS_READ FROM INFORMATION_SCHEMA.TABLE_STATISTICS WHERE TABLE_NAME='t1';
ROWS_READ
10
SELECT ROWS_READ FROM INFORMATION_SCHEMA.INDEX_STATISTICS WHERE TABLE_NAME='t1';
ROWS_READ
10
FLUSH TABLE_STATISTICS;
SELECT ROWS_READ FROM INFORMATION_SCHEMA.TABLE_STATISTICS WHERE TABLE_NAME='t1';
ROWS_READ
SELECT ROWS_READ FROM INFORMATION_SCHEMA.INDEX_STATISTICS WHERE TABLE_NAME='t1';
ROWS_READ
10
FLUSH INDEX_STATISTICS;
SELECT ROWS_READ FROM INFORMATION_SCHEMA.INDEX_STATISTICS WHERE TABLE_NAME='t1';
ROWS_READ
SELECT MAX(a) FROM t1;
MAX(a)
10
SELECT ROWS_READ FROM INFORMATION_SCHEMA.TABLE_STATISTICS WHERE TABLE_NAME='t1';
ROWS_READ
10
SELECT ROWS_READ FROM INFORMATION_SCHEMA.INDEX_STATISTICS WHERE TABLE_NAME='t1';
ROWS_READ
10
DROP TABLE t1;
CREATE TABLE t2 (c1 INT UNSIGNED) ENGINE=InnoDB;
ALTER TABLE t2 MODIFY c1 FLOAT;
SELECT * FROM INFORMATION_SCHEMA.TABLE_STATISTICS WHERE TABLE_NAME='t2';
TABLE_SCHEMA	TABLE_NAME	ROWS_READ	ROWS_CHANGED	ROWS_CHANGED_X_INDEXES
DROP TABLE t2;
SET GLOBAL userstat= @userstat_old;
SET SESSION default_storage_engine = @default_storage_engine_old;
