config root man

--source include/have_innodb.inc

eval CREATE TABLE `t` (
`a` VARCHAR(10000),   `b` VARCHAR(3000),
`c` VARCHAR(14000) GENERATED ALWAYS AS (CONCAT(a,b)) VIRTUAL,
`d` VARCHAR(5000) GENERATED ALWAYS AS (b) VIRTUAL,
`e` INT(11) GENERATED ALWAYS AS (10) VIRTUAL,
`h` INT(11) NOT NULL,
PRIMARY KEY (`h`) ) ROW_FORMAT=$row_format  ENGINE=InnoDB;

SHOW CREATE TABLE t;

INSERT INTO t VALUES (REPEAT('g', 10000), REPEAT('x', 2800), DEFAULT, DEFAULT, DEFAULT, 1);

INSERT INTO t VALUES (REPEAT('a', 9000), REPEAT('b', 2000), DEFAULT, DEFAULT, DEFAULT, 2);
INSERT INTO t VALUES (REPEAT('m', 8000), REPEAT('n', 3000), DEFAULT, DEFAULT, DEFAULT, 3);
CREATE INDEX idx ON t(c(100), d(20));
UPDATE t SET a = REPEAT(CAST(1 AS CHAR), 2000) WHERE h = 1;

delimiter |;
CREATE PROCEDURE UPDATE_t()
begin
        DECLARE i INT DEFAULT 1;
        WHILE (i <= 100) DO
                UPDATE t SET a = REPEAT(CAST(i AS CHAR), 2000) WHERE h = 1;
                SET i = i + 1;
        END WHILE;
END|

CREATE PROCEDURE DELETE_insert_t()
begin
        DECLARE i INT DEFAULT 1;
        WHILE (i <= 100) DO
                DELETE FROM t WHERE h = 1;
                INSERT INTO t VALUES (REPEAT(CAST(i AS CHAR), 2000) ,  REPEAT('b', 2000), DEFAULT, DEFAULT, DEFAULT, 1);
                SET i = i + 1;
        END WHILE;
END|
delimiter ;|

CALL UPDATE_t();

CALL DELETE_insert_t();

UPDATE t SET a = NULL WHERE h=1;

START TRANSACTION;
CALL UPDATE_t();
ROLLBACK;

DROP PROCEDURE DELETE_insert_t;
DROP PROCEDURE UPDATE_t;
DROP TABLE t;