SQL查詢到休眠標準

Question

我是新的休眠實際上。有問題創建下面的SQL查詢的標準對象。你願意帶領我嗎？

SELECT P1.*,O1.PROJECT_OID FROM POINTALL P1 
LEFT JOIN 
OPERATION_PLAN O1 
ON P1.OID = O1.GEOVISION_POINT_OID; 

Answer 1

您不需要創建條件。您可以執行原生SQL查詢，甚至可以在與SQL非常相似的HQL中編寫相同的查詢。

Answer 2

如果您POINTALL和OPERATION_PLAN表比唯一的標準將致力於以其它方式使用HQL或SQL映射。

這就是你需要創建

Criteria criteria = getSession().createCriteria(POINTALL.class,"P1"); 

ProjectionList projections = Projections.projectionList(); 
projections.add(Projections.property("P1.something"),"aliasName"); 
projections.add(Projections.property("P1.something"),"aliasName"); 
.. 
projections.add(Projections.property("O1.PROJECT_OID"),"PROJECT_OID"); 

criteria.createAlias("P1.OPERATION_PLAN","O1", Criteria.LEFT_JOIN); 

criteria.setProjection(projections);