異常收集( 六 ) com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:

首先,這個異常是數據SQL語法異常

先上異常截圖:

{"msg":"服務器出現未知錯誤，請聯繫管理員！","data":"org.springframework.jdbc.BadSqlGrammarException: 
\n### Error querying database.  Cause: 

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: 

Expression 
#1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'cmis.sys_clock_in.id_' which is not functionally dependent on columns in GROUP BY clause; 
this is incompatible with sql_mode=only_full_group_by\n### 
The error may exist in class path resource [mybatis/SysClockInMapper.xml]\n### The error may involve com.sinosoft.sys.mapper.SysClockInMapper.getMonitorList-Inline\n### 
The error occurred while setting parameters\n### SQL: 
select count(0) from (select         id_ as 'id',         user_id_ as 'userId',         user_name_ as 'userName',         org_id_ as 'orgId',         org_name_ as 'orgName',         clock_time_ as 'clockTime',         clock_type_ as 'clockType'         from sys_clock_in         where         TO_DAYS( clock_time_ ) = TO_DAYS( NOW( ) )                             GROUP BY user_id_,org_id_         HAVING count( user_id_ ) = 1) tmp_count

\n### Cause: 
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: 
Expression
 #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'cmis.sys_clock_in.id_' which is not functionally dependent on columns in GROUP BY clause; 
 this is incompatible with sql_mode=only_full_group_by
 ; bad SQL grammar []; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: 
 Expression
 #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'cmis.sys_clock_in.id_' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by\n\tat org.springframework.jdbc.support.SQLExceptionSubclassTranslator.doTranslate(SQLExceptionSubclassTranslator.java:93)\n\tat org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)\n\tat org.springframework.jdbc.support.AbstractFallbackSQLException

出現這個異常是以爲今天同事提出的, 本地執行SQL沒有問題,但是在線上就報錯,查了mysql版本都是5.7的.

sql語句如下

SELECT
	count( 0 ) 
FROM
	(
	SELECT
		id_ AS 'id',
		user_id_ AS 'userId',
		user_name_ AS 'userName',
		org_id_ AS 'orgId',
		org_name_ AS 'orgName',
		clock_time_ AS 'clockTime',
		clock_type_ AS 'clockType' 
	FROM
		sys_clock_in 
	WHERE
		TO_DAYS( clock_time_ ) = TO_DAYS( NOW( ) ) 
	GROUP BY
		user_id_,
		org_id_ 
	HAVING
	count( user_id_ ) = 1 
	) tmp_count

經過漫長的排查後發現在MySQL的5.7.5之後有個設置是ONLY_FULL_GROUP_BY默認是開啓狀態.

默認的sql-mode裏的ONLY_FULL_GROUP_BY字段導致不能直接查詢group_by包裹的之外的字段.

類似上面的語句聚合函數默認的參數是主鍵column, 這裏是id_. 只需要在group by 後添加參數id_ 就行了

SELECT
	count( 0 ) 
FROM
	(
	SELECT
		id_ AS 'id',
		user_id_ AS 'userId',
		user_name_ AS 'userName',
		org_id_ AS 'orgId',
		org_name_ AS 'orgName',
		clock_time_ AS 'clockTime',
		clock_type_ AS 'clockType' 
	FROM
		sys_clock_in 
	WHERE
		TO_DAYS( clock_time_ ) = TO_DAYS( NOW( ) ) 
	GROUP BY
        <!-- 在此處添加主鍵字段 -->
        id_,
		user_id_,
		org_id_ 
	HAVING
	count( user_id_ ) = 1 
	) tmp_count