RocksDB ROW_COUNT() after UPDATE always 1, even if the data has not changed.

DROP TABLE IF EXISTS `test`;

CREATE TABLE `test`

(

	`id` INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,

	`status` TINYINT UNSIGNED NOT NULL,

	KEY(`status`)

)

ENGINE=ROCKSDB CHARACTER SET utf8 COLLATE utf8_general_ci;

INSERT INTO `test`(`id`,`status`) VALUES (1,1),(2,2),(3,3);

UPDATE `test` SET `status`=2 WHERE `id`=2;

SELECT ROW_COUNT();