MySQL中创建存储过程出现报错如何解决

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mysql delimiter $$
mysql CREATE FUNCTION check_rollbackPatch(THE_REFERNCE_LABEL VARCHAR(75), THE_COLUMN_NAME VARCHAR(75), THE_INSTALL_VERSION VARCHAR(75), THE_VERSION_LEVEL_TABLE_NAME VARCHAR(75))
– RETURNS INTEGER DETERMINISTIC
– BEGIN
– DECLARE INSTALL_VERSION VARCHAR(80) DEFAULT NULL;
– DECLARE REFERENCE_LABEL VARCHAR(80) DEFAULT NULL;
– DECLARE THE_QUERY VARCHAR(500) DEFAULT NULL;
– DECLARE too_many_rows CONDITION FOR 1172;
– DECLARE CONTINUE HANDLER FOR too_many_rows
– BEGIN
– SELECT concat([INFO] Several , THE_REFERNCE_LABEL, references found.
– RETURN 0;
– END;
– DECLARE CONTINUE HANDLER FOR NOT FOUND
– BEGIN
– /*SELECT concat([INFO] , THE_REFERNCE_LABEL, reference not found. */
– RETURN 1;
– END;
– SELECT concat(, THE_COLUMN_NAME, , C_INSTALL_VERSION) INTO @V_PART1;
– SELECT concat(THE_COLUMN_NAME, = , THE_REFERNCE_LABEL, and C_INSTALL_VERSION= , THE_INSTALL_VERSION,) INTO @V_PART2;
– SELECT format_selectQuery(THE_VERSION_LEVEL_TABLE_NAME, @V_PART1, @V_PART2) INTO THE_QUERY;
– /*SELECT concat([INFO] The query to execute is [, THE_QUERY,] */
– /*EXECUTE IMMEDIATE THE_QUERY into REFERENCE_LABEL, INSTALL_VERSION;*/
– /*SELECT concat([INFO] , THE_REFERNCE_LABEL, reference found */
– RETURN 0;
– END $$
ERROR 1415 (0A000): Not allowed to return a result set from a function
mysql delimiter ;

报错原因：
在 MySQL 的 function 里，不能使用 SELECT 语句来返回结果集，会报错。

注释掉后，报错消失
mysql delimiter $$
mysql CREATE FUNCTION check_rollbackPatch(THE_REFERNCE_LABEL VARCHAR(75), THE_COLUMN_NAME VARCHAR(75), THE_INSTALL_VERSION VARCHAR(75), THE_VERSION_LEVEL_TABLE_NAME VARCHAR(75))
– RETURNS INTEGER DETERMINISTIC
– BEGIN
– DECLARE INSTALL_VERSION VARCHAR(80) DEFAULT NULL;
– DECLARE REFERENCE_LABEL VARCHAR(80) DEFAULT NULL;
– DECLARE THE_QUERY VARCHAR(500) DEFAULT NULL;
– DECLARE too_many_rows CONDITION FOR 1172;
– DECLARE CONTINUE HANDLER FOR too_many_rows
– BEGIN
– /*SELECT concat([INFO] Several , THE_REFERNCE_LABEL, references found. */
– RETURN 0;
– END;
– DECLARE CONTINUE HANDLER FOR NOT FOUND
– BEGIN
– /*SELECT concat([INFO] , THE_REFERNCE_LABEL, reference not found. */
– RETURN 1;
– END;
– SELECT concat(, THE_COLUMN_NAME, , C_INSTALL_VERSION) INTO @V_PART1;
– SELECT concat(THE_COLUMN_NAME, = , THE_REFERNCE_LABEL, and C_INSTALL_VERSION= , THE_INSTALL_VERSION,) INTO @V_PART2;
– SELECT format_selectQuery(THE_VERSION_LEVEL_TABLE_NAME, @V_PART1, @V_PART2) INTO THE_QUERY;
– /*SELECT concat([INFO] The query to execute is [, THE_QUERY,] */
– /*EXECUTE IMMEDIATE THE_QUERY into REFERENCE_LABEL, INSTALL_VERSION;*/
– /*SELECT concat([INFO] , THE_REFERNCE_LABEL, reference found */
– RETURN 0;
– END $$
Query OK, 0 rows affected (0.00 sec)