我遇到了一個奇怪的錯誤,試圖在MySQL中使用Hibernate。我有以下命名查詢:休眠MySQL查詢錯誤加入的未知列在
SELECT SUM(s.plotline.value), s.character FROM Story as s WHERE s.chapter.chapterID = ?1 GROUP BY s.character ORDER BY SUM(s.plotline.value)
這被轉換爲下面的SQL語句:
select sum(plotline1_.Value) as col_0_0_, story0_.CharacterID as col_1_0_, character2_.CharacterID as Characte1_5_,
character2_.AuthorID as AuthorID5_, character2_.BookID as BookID5_, character2_.CharacterName as Characte2_5_,
character2_.LastModified as LastModi3_5_
from fantasy.story story0_, fantasy.plotline plotline1_
inner join fantasy.character character2_ on story0_.CharacterID=character2_.CharacterID
where story0_.PlotlineID=plotline1_.PlotlineID and story0_.ChapterID= 4
group by story0_.CharacterID
order by count(plotline1_.Value)
當我執行此我得到:
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'story0_.CharacterID' in 'on clause'
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
java.lang.reflect.Constructor.newInstance(Unknown Source)
com.mysql.jdbc.Util.handleNewInstance(Util.java:407)
com.mysql.jdbc.Util.getInstance(Util.java:382)
如果我更改查詢到這並直接在SQL中運行它運行正常:
select sum(plotline1_.Value) as col_0_0_, story0.CharacterID as col_1_0_, character2_.CharacterID as Characte1_5_,
character2_.AuthorID as AuthorID5_, character2_.BookID as BookID5_, character2_.CharacterName as Characte2_5_,
character2_.LastModified as LastModi3_5_
from fantasy.story story0, fantasy.plotline plotline1_
inner join fantasy.character character2_ on CharacterID = character2_.CharacterID
where story0.PlotlineID=plotline1_.PlotlineID and story0.ChapterID= 4
group by story0.CharacterID
order by count(plotline1_.Value)
有兩個部分對這一問題
- 爲什麼去掉明確資格中或CharacterId的連接,使這項工作?我的經驗主要是使用SQL Server,如果您嘗試以這種方式編寫查詢,它實際上會失敗。
- 有沒有辦法讓Hibernate以適當的形式給我提供查詢或調整我的MySQL配置,以便它接受Hibernate產生它的方式的查詢?
我可能已經找到了第1部分的解釋http://krisgale.com/beware-of-table-alias-in-left-join/似乎MySQL決定要求括號多個表,如果他們在選擇從版本5開始。這不幫助我修復我的hibernate查詢,這裏的幫助仍然非常感謝 – 2011-03-02 02:22:52