[英]Path expected for join HQL - Hibernate
我有以下HQL
.createQuery("select dl from DocumentLink dl " +
"left join DigitalFile df on df.iddigitalfile = dl.parentId and dl.entity.identity =:entityId " +
"where (dl.entity.identity =:entityId && dl.parentId =: parentId) || " +
"(df.entity.identity =:entityId and df.parentId =: parentId) ", DocumentLink.class);
所需的SQL查詢:
select * from documentlink dl
left join digitalfile df on df.iddigitalfile = dl.ParentId and dl.entity = 261
where (dl.entity = 5 and dl.parentId = 39845) OR (df.entity = 5 and df.parentId = 39845);
當我在Hibernate環境中運行此查詢時,得到了以下堆棧跟蹤。
Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: Path expected for join! [select dl from com.raetsmarine.raetsbase3.domain.DocumentLink dl left join DigitalFile df on df.iddigitalfile = dl.parentId and dl.entity.identity =:entityId where (dl.entity.identity =:entityId and dl.parentId =: parentId)]
at org.hibernate.hql.internal.ast.QuerySyntaxException.convert(QuerySyntaxException.java:91)
at org.hibernate.hql.internal.ast.ErrorCounter.throwQueryException(ErrorCounter.java:109)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:284)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:206)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:158)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:131)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:93)
您有什么建議,我該如何正確轉換?
假設有兩個類
@Getters
@Setters
public class A {
Long id;
@OneToOne
B b
}
和
@Getters
@Setters
public class B {
Long id;
Long someAttribute;
}
然后加入HQL會像
SELECT a FROM A a
LEFT OUTER JOIN a.b
WHERE b.someAttribute = 'Any Value'
注意,該類的名稱已被省略,而該字段的名稱已在HQL中使用,而沒有實際提供ON
clause
。
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