在 MySQL 存储过程中,如何为从 select 语句创建的临时表声明游标。 谢谢,
DELIMITER $$
DROP PROCEDURE IF EXISTS `sp_foo`$$
CREATE PROCEDURE sp_foo()
BEGIN
DROP TEMPORARY TABLE IF EXISTS `TmpMyTable`;
CREATE TEMPORARY TABLE `TmpMyTable` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`person_id` INT(11) NOT NULL,
`first_name` VARCHAR(60) NOT NULL,
`last_name` VARCHAR(60) NOT NULL,
PRIMARY KEY (`id`),
INDEX `idx_first_name` (`person_id`),
INDEX `idx_first_name` (`first_name`)
) ENGINE=MYISAM
SELECT
id AS `person_id`,
first_name,
last_name
FROM person
;
DECLARE _person_id INT(11);
DECLARE personCursor CURSOR
FOR
SELECT * FROM TmpMyTable;
OPEN personCursor;
LOOP
FETCH personCursor INTO _person_id;
...
END LOOP;
END$$
DELIMITER ;
最佳答案
在您的示例中,在创建临时表之前进行游标声明。看似不合逻辑,但确实有效。
关于MySQL 存储过程 : How to declare a Cursor for a Select from a temporary table?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/19161358/