"where exists" in Hibernate HQL 在Hibernate HQL中的"where exists"
"where exists" in Hibernate HQL 在Hibernate HQL中的"where exists"
我该如何在HQL中编写一个“not exists”查询?我试图获得一个HQL的not exists查询,返回与此Oracle SQL查询相同的结果:
select * from SCHOOL a where not exists (select 1 from STUDENT b where B.SCHOOL_ID=a.id and B.STATUS_ID not in (0,1,2,3,4))
我的映射文件如下:
我在我的School.hbm.xml文件中尝试使用以下标签
然后我得到了这个堆栈跟踪
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [applicationContext.xml]: Invocation of init method failed; nested exception is java.lang.NullPointerException Caused by: java.lang.NullPointerException at org.hibernate.hql.ast.HqlParser.negateNode(HqlParser.java:117) at org.hibernate.hql.antlr.HqlBaseParser.negatedExpression(HqlBaseParser.java:2378) at org.hibernate.hql.antlr.HqlBaseParser.logicalAndExpression(HqlBaseParser.java:2331) at org.hibernate.hql.antlr.HqlBaseParser.logicalOrExpression(HqlBaseParser.java:2296) at org.hibernate.hql.antlr.HqlBaseParser.expression(HqlBaseParser.java:2082) at org.hibernate.hql.antlr.HqlBaseParser.logicalExpression(HqlBaseParser.java:1858) at org.hibernate.hql.antlr.HqlBaseParser.whereClause(HqlBaseParser.java:454) at org.hibernate.hql.antlr.HqlBaseParser.queryRule(HqlBaseParser.java:708) at org.hibernate.hql.antlr.HqlBaseParser.selectStatement(HqlBaseParser.java:296) at org.hibernate.hql.antlr.HqlBaseParser.statement(HqlBaseParser.java:159) at org.hibernate.hql.ast.QueryTranslatorImpl.parse(QueryTranslatorImpl.java:248) at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:157) at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:111) at org.hibernate.engine.query.HQLQueryPlan.(HQLQueryPlan.java:77) at org.hibernate.engine.query.HQLQueryPlan. (HQLQueryPlan.java:56) at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:72) at org.hibernate.impl.SessionFactoryImpl.checkNamedQueries(SessionFactoryImpl.java:402) at org.hibernate.impl.SessionFactoryImpl. (SessionFactoryImpl.java:352)
有人能告诉我我在做什么错吗?
谢谢!