From bb301912ce367fc10309fa113d9cc9d85a2b32f6 Mon Sep 17 00:00:00 2001
From: zyimm <zyimm@qq.com>
Date: Thu, 10 Oct 2024 15:37:30 +0800
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+---
+title: 🦻 MySQL的1449错误，definer不存在处理
+date: 2024-10-10
+tags: 
+  - mysql
+---
+
+MySQL 错误 1449 通常表示 "The user specified as a definer ('user'@'host') does not exist"。出现这个错误的原因是mysql在尝试执行某个存储过程、函数或视图时，定义者（definer）指定的用户不存在于数据库中。
+
+首先先查看一下，目前数据库中存储过程有哪些定义者，sql如下：
+
+```sh
+SELECT 
+    ROUTINE_NAME, 
+    DEFINER
+FROM 
+    information_schema.ROUTINES
+WHERE 
+    ROUTINE_TYPE = 'PROCEDURE' 
+    AND ROUTINE_SCHEMA = 'your_database_name'; # your_database_name 替换成实际数据库名称
+```
+<!--more-->
+看一下DEFINER的值，是否再目前数据库用户当中，根据实际情况进行如下1或2解决：
+
+## 1. 创建缺失的用户
+
+```sh
+CREATE USER 'user'@'host' IDENTIFIED BY 'password';
+```
+
+替换 'user'、'host' 和 'password' 为实际值。之后别忘了赋予适当的权限给新创建的用户。
+
+赋予权限如下：
+
+```sh
+GRANT SELECT, INSERT, UPDATE ON my_database.my_table TO 'user'@'host'; # my_database.my_table 赋予 SELECT, INSERT, UPDATE
+
+#或赋予所有权限，视情况而定
+
+GRANT ALL PRIVILEGES ON my_database.my_table TO 'user'@'host';
+
+```
+
+更改权限之后，需要刷新权限！
+
+```sh
+FLUSH PRIVILEGES; 
+```
+
+### 2. 修改定义者的身份
+
+修改存储过程、函数或视图的定义者为一个存在的用户。
+
+```sh
+ALTER DEFINER = 'new_user'@'new_host' PROCEDURE your_procedure_name #'new_user'@'new_host' 替换实际用户;
+```