其实allowMultiQueries参数是一个比较基础的参数，见名知意 支持多SQL执行的参数。

适用场景

其实这个参数是ORM框架中使用的，可能很多人误以为是MySQL的参数，其实并不是。

例如下面这个mybatis sql脚本，最终生成的SQL应该是多个update语句，中间用 ； 隔开，Mybatis框架对于这种SQL的执行就需要allowMultiQueries = true的支持。

<update id="batchUpdate" parameterType="list" timeout="3"><foreach collection="list" item="item" index="index" open="" close="" separator=";">update t_voucher<trim prefix="SET" suffixOverrides=","><if test="item.status != null">status = #{item.status},</if><if test="item.price != null">price = #{item.price},</if></trim>where id = #{item.id}</foreach>
</update>

如果jdbc url中没有设置allowMultiQueries = true这个参数值，那当运行过程中执行到上面这种形式的SQL的时候会报错。对应的错误是Mybatis的错误：

### Error updating database.  Cause: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UPDATE t_voucher SETstatus = 3,' at line 43
### The error may involve com.test.product.mapper.voucherBaseMapper.batchUpdate
### The error occurred while setting parameters
### SQL: UPDATE t_voucher SET  status = ? WHERE id = ? ; UPDATE t_voucher SET  status = ?  WHERE  id = ?
### Cause: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UPDATE t_voucher SETstatus = 3,' at line 43
; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UPDATE t_voucher SETstatus = 3