MySQL中创建存储过程出现报错如何解决

2024-04-02 19:04:59 593人浏览安东尼

摘要

这期内容当中小编将会给大家带来有关Mysql中创建存储过程出现报错如何解决，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。 mysql>

这期内容当中小编将会给大家带来有关Mysql中创建存储过程出现报错如何解决，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。

mysql> delimiter $$
mysql> CREATE FUNCTioN check_rollbackPatch(THE_REFERNCE_LABEL VARCHAR(75), THE_COLUMN_NAME VARCHAR(75), THE_INSTALL_VERSION VARCHAR(75), THE_VERSION_LEVEL_TABLE_NAME VARCHAR(75))
    ->     RETURNS INTEGER DETERMINISTIC
    ->     BEGIN
    ->         DECLARE INSTALL_VERSION VARCHAR(80) DEFAULT NULL;
    ->         DECLARE REFERENCE_LABEL VARCHAR(80) DEFAULT NULL;
    ->         DECLARE THE_QUERY VARCHAR(500) DEFAULT NULL;
    ->         DECLARE too_many_rows CONDITION FOR 1172;
    ->         DECLARE CONTINUE HANDLER FOR too_many_rows
    ->         BEGIN
    ->         SELECT concat('[INFO]    Several ', THE_REFERNCE_LABEL, ' references found.');
    ->         RETURN 0;
    ->         END;
    ->         DECLARE CONTINUE HANDLER FOR NOT FOUND
    ->         BEGIN
    ->
    ->         RETURN 1;
    ->         END;
    ->         SELECT concat('', THE_COLUMN_NAME, ', C_INSTALL_VERSION') INTO @V_PART1;
    ->         SELECT concat(THE_COLUMN_NAME, '=''', THE_REFERNCE_LABEL, ''' and C_INSTALL_VERSION=''', THE_INSTALL_VERSION, '''') INTO @V_PART2;
    ->         SELECT fORMat_selectQuery(THE_VERSION_LEVEL_TABLE_NAME, @V_PART1, @V_PART2) INTO THE_QUERY;
    ->
    ->
    ->
    ->         RETURN 0;
    ->     END $$
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 $$
mysql> CREATE FUNCTION check_rollbackPatch(THE_REFERNCE_LABEL VARCHAR(75), THE_COLUMN_NAME VARCHAR(75), THE_INSTALL_VERSION VARCHAR(75), THE_VERSION_LEVEL_TABLE_NAME VARCHAR(75))
    ->     RETURNS INTEGER DETERMINISTIC
    ->     BEGIN
    ->         DECLARE INSTALL_VERSION VARCHAR(80) DEFAULT NULL;
    ->         DECLARE REFERENCE_LABEL VARCHAR(80) DEFAULT NULL;
    ->         DECLARE THE_QUERY VARCHAR(500) DEFAULT NULL;
    ->         DECLARE too_many_rows CONDITION FOR 1172;
    ->         DECLARE CONTINUE HANDLER FOR too_many_rows
    ->         BEGIN
    ->
    ->         RETURN 0;
    ->         END;
    ->         DECLARE CONTINUE HANDLER FOR NOT FOUND
    ->         BEGIN
    ->
    ->         RETURN 1;
    ->         END;
    ->         SELECT concat('', THE_COLUMN_NAME, ', C_INSTALL_VERSION') INTO @V_PART1;
    ->         SELECT concat(THE_COLUMN_NAME, '=''', THE_REFERNCE_LABEL, ''' and C_INSTALL_VERSION=''', THE_INSTALL_VERSION, '''') INTO @V_PART2;
    ->         SELECT format_selectQuery(THE_VERSION_LEVEL_TABLE_NAME, @V_PART1, @V_PART2) INTO THE_QUERY;
    ->
    ->
    ->
    ->         RETURN 0;
    ->     END $$
Query OK, 0 rows affected (0.00 sec)

mysql> delimiter ;