java中的接口是类吗
548
2022-11-05
mybatis 实现多条update同时执行
想在mapper的一个更新节点进行多条update语句的操作:
update user set valid_status = 1 where mobile_phone = #{mobilePhone};
update user_account set valid_status = 1 where mobile_phone = #{mobilePhone} ;
mybatis是默认不支持的,需要在数据库配置中配置相关参数:
propertes 或者yml配置 文件中的jdbc后追加&allowMultiQueries=true
jdbc.jdbcUrl=jdbc:mysql://127.0.0.1:3306/database?useUnicode=true&characterEncoding=utf8&allowMultiQueries=true
补充:mybatis批量更新update-设置多个字段值
mybatis由于简单易用性得到大家的认可和使用
但是在批量更新操作中,网上介绍的貌似不全,正好今天做个记录,大家一起进步
在实际项目开发过程中,常有这样的需求:根据ids更新表的某一个字段值,这时的sql语句是:
public interface IStaffDao {
void batchUpdate(@Param("list") List
}
update staff set status = 0 where id in
#{item}
ORDER BY id
还有一种情况:根据ids更新表的多个值,并且每个id对应的值也不一样,这时上述语句已经满足不了需求,需要另一种批量更新sql语jmDUye句
public interface IStaffDao {
void batchUpdate(@Param("list") List
}
UPDATE staff set count = #{item.count} , code = #{item.code} , invalid_time = #{item.time} WHERE id = #{item.id}
由于这种批量更新是一次执行多个update语句,所以mybatis需要额外的配置:
在spring.datasource.url后加上allowMultiQueries=true
如:jdbc:mysql://10.10.20.36:3306/test?allowMultiQueries=true
否则,在执行sql语句时,会报下面的错误
[org.apache.ibatis.session.defaults.DefaultSqlSession@76a2f910]
org.springframework.jdbc.BadSqlGrammarException:
### Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: 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 b_email_msg_remind
SET send_status = 1, send_email_code='abc@abc.abc'' at line 6
### The error may involve com.hhsoft.sectionservice.model.persistence.EmailMapper.updateEmailTasks-Inline
### The error occurred while setting parameters
### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: 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 staff
SET status = 1, send_email_code='abc@abc.abc';update staff SET status = 2, send_email_code='test@qq.com' ' at line 6
; bad SQL grammar []; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: 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 b_email_msg_remind
SET send_status = 1, send_email_code='abc@abc.abc'' at line 6
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