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我正在复制数据为多对多关系表制作第三个表。 存储过程目前看起来是这样,但它有一些错误MySQL存储过程嵌套游标错误
DELIMITER $$
CREATE PROCEDURE `test`.UpdateRelatedAccounts()
BEGIN
DECLARE ssn_sel_id VARCHAR(255) DEFAULT 0;
DECLARE id_sel_id CHAR(36) DEFAULT 0;
DECLARE id_sel_rel CHAR(36) DEFAULT 0;
DECLARE no_more_rows BOOLEAN;
DECLARE num_rows INT DEFAULT 0;
DECLARE no_more_rel_rows BOOLEAN;
DECLARE rel_num_rows INT DEFAULT 0;
DECLARE ssn_all_cur CURSOR FOR
SELECT ssn, id FROM ssn WHERE ssn NOT IN ('','000-00-0000');
DECLARE ssn_cur CURSOR FOR
SELECT id FROM ssn WHERE id != id_sel_id AND ssn = ssn_sel_id;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET no_more_rows = TRUE;
-- DECLARE CONTINUE HANDLER FOR NOT FOUND SET no_more_rel_rows = TRUE;
OPEN ssn_all_cur;
SELECT FOUND_ROWS() INTO num_rows;
the_loop: LOOP
FETCH ssn_all_cur
INTO ssn_sel_id, id_sel_id;
IF no_more_rows THEN
CLOSE ssn_all_cur;
LEAVE the_loop;
END IF;
OPEN ssn_cur;
SELECT FOUND_ROWS() INTO rel_num_rows;
the_rel_loop: LOOP
FETCH ssn_cur
INTO id_sel_rel;
IF no_more_rel_rows THEN
CLOSE ssn_cur;
LEAVE the_rel_loop;
END IF;
INSERT INTO `ssn_related` (`ssn_primary`, `ssn_related`) VALUES (id_sel_id, id_sel_rel), (id_sel_rel, id_sel_id);
END LOOP the_rel_loop;
END LOOP the_loop;
END$$
DELIMITER ;
我怎么巢使用的值,并插入到第三个表。
确切地说,“它有一些错误”是什么意思? – Bohemian 2013-02-21 11:38:47
它不运行插入查询,以便将所有相关记录插入到表中 – HardCode 2013-02-21 11:59:12