Question

有人可以指出为什么我遇到语法错误吗？每当我尝试将其输入到控制台中时，都会收到“ expre2”的语法错误，但由于似乎没问题，我没有得到它：

DELIMITER $$

DROP PROCEDURE IF EXISTS `add_User`$$

CREATE PROCEDURE `add_User`(IN `p_Name` VARCHAR(45), IN `p_Passw` VARCHAR(200), IN NIF INT(12))
BEGIN
    DECLARE `_HOST` CHAR(14) DEFAULT '@\'localhost\'';
    SET `p_Name` := CONCAT('\'', REPLACE(TRIM(`p_Name`), CHAR(39), CONCAT(CHAR(92), CHAR(39))), '\''),
    `p_Passw` := CONCAT('\'', REPLACE(`p_Passw`, CHAR(39), CONCAT(CHAR(92), CHAR(39))), '\'');
    SET @`sql` := CONCAT('CREATE USER ', `p_Name`, `_HOST`, ' IDENTIFIED BY ', `p_Passw`);
    PREPARE `stmt` FROM @`sql`;
    EXECUTE `stmt`;
    DEALLOCATE PREPARE `stmt`;
    FLUSH PRIVILEGES;
    SET @`expre` := CONCAT('GRANT SELECT, INSERT, UPDATE ON trabalho.ver_assist TO ', `p_Name`);
PREPARE `stmt2` FROM @`expre`;
EXECUTE `stmt2`;
DEALLOCATE `stmt2`;
    SET @`expre2` := CONCAT('GRANT SELECT, INSERT, UPDATE ON trabalho.ver_saidas TO ', `p_Name`);
PREPARE `stmt3` FROM @`expre2`;
EXECUTE `stmt3`;
DEALLOCATE `stmt3`;
FLUSH PRIVILEGES;
END$$

我真的不明白为什么它不起作用...

Answer 1

您的set语句不正确，您必须选择例如SET @sql：=（选择CONCAT（'CREATE USER'，p_Name，_HOST，'IDENTIFIED BY'，p_Passw ））;

您的dealloc的2个错误，语法为dealloc的准备一些东西

那里有很多不必要的反引号。

Answer 2

您在PREPARE和DEALLOCATE stmt2中分别是missing和DEALLOCATE stmt3。请在更正的查询下方找到：

DROP PROCEDURE IF EXISTS `add_User`$$

CREATE PROCEDURE `add_User`(IN `p_Name` VARCHAR(45), IN `p_Passw` VARCHAR(200), IN NIF INT(12))
BEGIN
    DECLARE `_HOST` CHAR(14) DEFAULT '@\'localhost\'';
    SET `p_Name` := CONCAT('\'', REPLACE(TRIM(`p_Name`), CHAR(39), CONCAT(CHAR(92), CHAR(39))), '\''),
    `p_Passw` := CONCAT('\'', REPLACE(`p_Passw`, CHAR(39), CONCAT(CHAR(92), CHAR(39))), '\'');
    SET @`sql` := CONCAT('CREATE USER ', `p_Name`, `_HOST`, ' IDENTIFIED BY ', `p_Passw`);
    PREPARE `stmt` FROM @`sql`;
    EXECUTE `stmt`;
    DEALLOCATE PREPARE `stmt`;
    FLUSH PRIVILEGES;
    SET @`expre` := CONCAT('GRANT SELECT, INSERT, UPDATE ON trabalho.ver_assist TO ', `p_Name`);
PREPARE `stmt2` FROM @`expre`;
EXECUTE `stmt2`;
DEALLOCATE PREPARE `stmt2`;
    SET @`expre2` := CONCAT('GRANT SELECT, INSERT, UPDATE ON trabalho.ver_saidas TO ', `p_Name`);
PREPARE `stmt3` FROM @`expre2`;
EXECUTE `stmt3`;
DEALLOCATE PREPARE `stmt3`;
FLUSH PRIVILEGES;
END$$

SQL过程中的语法错误，无法创建用户并授予权限

2 个答案: