mysql创建一个存储过程用于一次性执行一条insert into table1(新增) 和一千条update table2 和五百条delete from table3的sql,其中这些运行的sql会通过mybatis传入
时间: 2024-09-20 11:16:26 浏览: 50
在MySQL中,你可以创建一个存储过程( stored procedure)来批量处理插入、更新和删除操作。虽然MyBatis通常负责映射SQL到具体的业务逻辑,但在这种场景下,存储过程可以帮助管理复杂的事务。以下是一个基本步骤,演示如何创建这样一个存储过程:
首先,你需要创建存储过程。假设我们有一个名为`batch_operation`的过程:
```sql
DELIMITER //
CREATE PROCEDURE batch_operation(IN input_inserts TEXT, IN input_updates TEXT, IN input_deletes TEXT)
BEGIN
-- 将输入的SQL字符串分割成数组
DECLARE insert_array CURSOR FOR SPLIT(input_inserts, '\n');
DECLARE update_array CURSOR FOR SPLIT(input_updates, '\n');
DECLARE delete_array CURSOR FOR SPLIT(input_deletes, '\n');
-- 执行每个插入、更新和删除的SQL
DECLARE continue HANDLER FOR NOT FOUND SET done = 1;
OPEN insert_array;
read_loop: LOOP
FETCH insert_array INTO @insert_query;
IF done THEN
LEAVE read_loop;
END IF;
PREPARE stmt FROM @insert_query;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
END LOOP;
CLOSE insert_array;
OPEN update_array;
read_loop: LOOP
FETCH update_array INTO @update_query;
IF done THEN
LEAVE read_loop;
END IF;
PREPARE stmt FROM @update_query;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
END LOOP;
CLOSE update_array;
OPEN delete_array;
read_loop: LOOP
FETCH delete_array INTO @delete_query;
IF done THEN
LEAVE read_loop;
END IF;
PREPARE stmt FROM @delete_query;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
END LOOP;
CLOSE delete_array;
END //
DELIMITER ;
```
然后,在MyBatis中调用这个存储过程,你可以传递一个包含所有SQL语句的字符串,例如:
```xml
<!-- 使用MyBatis Mapper -->
<insert id="executeBatchOperation" parameterType="map">
CALL batch_operation(
#{insertSql},
#{updateSql},
#{deleteSql}
);
</insert>
<update>
<!-- 你的其他MyBatis Update语句 -->
</update>
<!-- ... -->
<parameterMap id="batchOperationParams" type="map">
<entry key="insertSql" value-type="java.lang.String"/>
<entry key="updateSql" value-type="java.lang.String"/>
<entry key="deleteSql" value-type="java.lang.String"/>
</parameterMap>
```
当你需要执行这些操作时,只需要将相应的SQL分隔符`\n`后的每条语句作为参数传递给这个`executeBatchOperation`方法即可。
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