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我不知道 2 JPQL Exception 的解决方案

  1. 子查询必须只返回一列字段
  2. [PARENTENTITY.PARENTID2]在此表达式中，在此上下文中对于以下实体有一个无效表 -
    class ParentEntity{
      @Id
      String parentId1;
      @Id
      String parentId2;
      @ManyToOne
      ChildEntity childEntityRef;
    }

    class ChildEntity {  
      @Id
      String childId1; 
      @Id
      String childId2;
    }

当我尝试查询时- SELECT me.childId1,me.childId2 FROM ChildEntity as me where me <> ALL(Select pe.childEntityRef From ParentEntity as pe where pe.parentId1=:parentId1 and pe.parentId2=:parentId2 ) 它给出了以下异常-

Caused by: Exception [EclipseLink-6069] (Eclipse Persistence Services - 2.3.0.v20110604-r9504): org.eclipse.persistence.exceptions.QueryException
Exception Description: The field [PARENTENTITY.PARENTID2] in this expression has an invalid table in this context.
    at org.eclipse.persistence.exceptions.QueryException.invalidTableForFieldInExpression(QueryException.java:712)
    at org.eclipse.persistence.internal.expressions.FieldExpression.validateNode(FieldExpression.java:277)
    at org.eclipse.persistence.expressions.Expression.normalize(Expression.java:2978)
    at org.eclipse.persistence.internal.expressions.DataExpression.normalize(DataExpression.java:342)
    at org.eclipse.persistence.internal.expressions.FieldExpression.normalize(FieldExpression.java:205)
    at org.eclipse.persistence.internal.expressions.CompoundExpression.normalize(CompoundExpression.java:218)

当我尝试查询时- SELECT me.childId1,me.childId2 FROM ChildEntity as me where me <> (Select pe.childEntityRef From ParentEntity as pe where pe.parentId1=:parentId1 and pe.parentId2=:parentId2 ) 它给出了以下异常-

Caused by: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.3.0.v20110604-r9504): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: org.postgresql.util.PSQLException: ERROR: subquery must return only one column
Error Code: 0
Call: SELECT t0.CHILDID1, t0.CHILDID2 FROM CHILDENTITY t0 WHERE ( <> (SELECT t1.CHILDID1, t1.CHILDID2 FROM PARENTENTITY t2 LEFT OUTER JOIN CHILDENTITY t1 ON ((t1.CHILDID2 = t2.CHILDID2) AND (t1.CHILDID1 = t2.CHILDID1)) WHERE ((t2.PARENTID1 = ?) AND (t2.PARENTID2 = ?))))
    bind => [2 parameters bound]
Query: ReportQuery(referenceClass=ChildEntity sql="SELECT t0.CHILDID1, t0.CHILDID2 FROM CHILDENTITY t0 WHERE ( <> (SELECT t1.CHILDID1, t1.CHILDID2 FROM PARENTENTITY t2 LEFT OUTER JOIN CHILDENTITY t1 ON ((t1.CHILDID2 = t2.CHILDID2) AND (t1.CHILDID1 = t2.CHILDID1)) WHERE ((t2.PARENTID1 = ?) AND (t2.PARENTID2 = ?))))")
    at org.eclipse.persistence.exceptions.DatabaseException.sqlException(DatabaseException.java:333)
    at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:644)
    at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeCall(DatabaseAccessor.java:535)
Caused by: org.postgresql.util.PSQLException: ERROR: subquery must return only one column
    at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1592)
    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1327)
4

2 回答 2

1

尝试使用 2.4 或 2.5 版本，已经有很多 JPQL 增强和修复。尽管您尝试做的事情仍然无法按照您尝试的方式进行。

尝试简化您的查询，

SELECT me.childId1,me.childId2 FROM ChildEntity as me where not exists (Select pe.parentId1 From ParentEntity as pe where pe.parentId1=:parentId1 and pe.parentId2=:parentId2 and pe.childEntityRef = me)

或者，

SELECT me.childId1,me.childId2 FROM ChildEntity as me where not exists (Select pe.parentId1 From ParentEntity as pe where pe.parentId1=:parentId1 and pe.parentId2=:parentId2 and pe.childEntityRef.childId1 = me.childId1 and pe.childEntityRef.childId2 = me.childId2)

在 2.5 中，您还应该能够做到，

SELECT me.childId1,me.childId2 FROM ChildEntity as me where (me.childId1, mew.childId2) NOT IN (Select pe.childEntityRef.childId1, pe.childEntityRef.childId2 From ParentEntity as pe where pe.parentId1=:parentId1 and pe.parentId2=:parentId2 )
于 2013-06-17T14:21:55.913 回答
0

詹姆斯，请澄清下面定义的异常（响应您描述的查询）... 使用 Eclipselink 2.5 版本 [eclipselink-2.5.0.v20130507-3faac2b]

JPA 查询 1) SELECT me.childId1,me.childId2 FROM ChildEntity as me where not exist (Select pe.parentId1 From ParentEntity as pe where pe.parentId1=:parentId1 and pe.parentId2=:parentId2 and pe.childEntityRef = me)

输出-

    Caused by: Exception [EclipseLink-8025] (Eclipse Persistence Services - 2.0.1.v20100213-r6600): org.eclipse.persistence.exceptions.JPQLException
Exception Description: Syntax error parsing the query [SELECT me.childId1,me.childId2 FROM ChildEntity as me where not exist (Select pe.parentId1 From ParentEntity as pe where pe.parentId1=:parentId1 and pe.parentId2=:parentId2 and pe.childEntityRef = me)], line 1, column 70: unexpected token [(].
Internal Exception: NoViableAltException(81!=[652:1: simpleConditionalExpressionRemainder[Object left] returns [Object node] : (n= comparisonExpression[left] | (n1= NOT )? n= conditionWithNotExpression[(n1!=null), left] | IS (n2= NOT )? n= isExpression[(n2!=null), left] );])
    at org.eclipse.persistence.exceptions.JPQLException.unexpectedToken(JPQLException.java:372)
    at org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.handleRecognitionException(JPQLParser.java:319)
    at org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.addError(JPQLParser.java:245)

JPA 查询 2) SELECT me.childId1,me.childId2 FROM ChildEntity as me where not exist (Select pe.parentId1 From ParentEntity as pe where pe.parentId1=:parentId1 and pe.parentId2=:parentId2 and pe.childEntityRef.childId1 = me.childId1 and pe.childEntityRef.childId2 = me.childId2)

输出-

 Caused by: Exception [EclipseLink-8025] (Eclipse Persistence Services - 2.0.1.v20100213-r6600): org.eclipse.persistence.exceptions.JPQLException
Exception Description: Syntax error parsing the query [SELECT me.childId1,me.childId2 FROM ChildEntity as me where not exist (Select pe.parentId1 From ParentEntity as pe where pe.parentId1=:parentId1 and pe.parentId2=:parentId2 and pe.childEntityRef.childId1 = me.childId1 and pe.childEntityRef.childId2 = me.childId2)], line 1, column 70: unexpected token [(].
Internal Exception: NoViableAltException(81!=[652:1: simpleConditionalExpressionRemainder[Object left] returns [Object node] : (n= comparisonExpression[left] | (n1= NOT )? n= conditionWithNotExpression[(n1!=null), left] | IS (n2= NOT )? n= isExpression[(n2!=null), left] );])
    at org.eclipse.persistence.exceptions.JPQLException.unexpectedToken(JPQLException.java:372)
    at org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.handleRecognitionException(JPQLParser.java:319)
    at org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.addError(JPQLParser.java:245)

JPA 查询 3) SELECT me.childId1,me.childId2 FROM ChildEntity as me where (me.childId1,me.childId2) NOT IN (Select pe.childEntityRef.childId1, pe.childEntityRef.childId2 From ParentEntity as pe where pe.parentId1=:parentId1 and pe.parentId2=:parentId2 )

输出-

Caused by: Exception [EclipseLink-8024] (Eclipse Persistence Services - 2.0.1.v20100213-r6600): org.eclipse.persistence.exceptions.JPQLException
Exception Description: Syntax error parsing the query [SELECT me.childId1,me.childId2 FROM ChildEntity as me where (me.childId1,me.childId2) NOT IN (Select pe.childEntityRef.childId1, pe.childEntityRef.childId2 From ParentEntity as pe where pe.parentId1=:parentId1 and pe.parentId2=:parentId2 )], line 1, column 72: syntax error at [,].
Internal Exception: MismatchedTokenException(79!=82)
    at org.eclipse.persistence.exceptions.JPQLException.syntaxErrorAt(JPQLException.java:362)
    at org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.handleRecognitionException(JPQLParser.java:304)

但是 PostgreSQL 查询运行良好：

SQL 查询 1)

SELECT me.childId1,me.childId2 FROM ChildEntity as me where NOT EXISTS (
Select pe.parentId1 From ParentEntity as pe where pe.parentId1=? and pe.parentId2=?
 and pe.childId1 = me.childId1 and pe.childId2 = me.childId2)

SQL 查询 2)

SELECT me.childId1,me.childId2 FROM ChildEntity as me where (me.childId1,me.childId2) NOT IN (
Select pe.childId1, pe.childId2  From ParentEntity as pe where pe.parentId1=? and pe.parentId2=?)

更新 ：

对于第三个 JPA 查询） SELECT me.childId1,me.childId2 FROM ChildEntity as me where (me.childId1,me.childId2) NOT IN (Select pe.childEntityRef.childId1, pe.childEntityRef.childId2 From ParentEntity as pe where pe.parentId1=:parentId1 and pe.parentId2=:parentId2 )

输出-

[EL Warning]: 2013-06-18 19:21:54.407--UnitOfWork(15545028)--Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: org.postgresql.util.PSQLException: ERROR: invalid reference to FROM-clause entry for table "childentity"
Error Code: 0
Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.DatabaseException
Call: SELECT t0.CHILDID1, t0.CHILDID2 FROM CHILDENTITY t0 WHERE (CHILDENTITY.CHILDID1, CHILDENTITY.CHILDID2) NOT IN (SELECT t1.CHILDID1, t1.CHILDID2 FROM PARENTENTITY t2, CHILDENTITY t1 WHERE (((t2.PARENTID1 = ?) AND (t2.PARENTID2 = ?)) AND ((t1.CHILDID2 = t2.CHILDID2) AND (t1.CHILDID1 = t2.CHILDID1))))
Internal Exception: org.postgresql.util.PSQLException: ERROR: invalid reference to FROM-clause entry for table "childentity"
    bind => [2 parameters bound]
Error Code: 0
Query: ReportQuery(referenceClass=ChildEntity sql="SELECT t0.CHILDID1, t0.CHILDID2 FROM CHILDENTITY t0 WHERE (CHILDENTITY.CHILDID1, CHILDENTITY.CHILDID2) NOT IN (SELECT t1.CHILDID1, t1.CHILDID2 FROM PARENTENTITY t2, CHILDENTITY t1 WHERE (((t2.PARENTID1 = ?) AND (t2.PARENTID2 = ?)) AND ((t1.CHILDID2 = t2.CHILDID2) AND (t1.CHILDID1 = t2.CHILDID1))))")
Call: SELECT t0.CHILDID1, t0.CHILDID2 FROM CHILDENTITY t0 WHERE (CHILDENTITY.CHILDID1, CHILDENTITY.CHILDID2) NOT IN (SELECT t1.CHILDID1, t1.CHILDID2 FROM PARENTENTITY t2, CHILDENTITY t1 WHERE (((t2.PARENTID1 = ?) AND (t2.PARENTID2 = ?)) AND ((t1.CHILDID2 = t2.CHILDID2) AND (t1.CHILDID1 = t2.CHILDID1))))
    bind => [2 parameters bound]
Query: ReportQuery(referenceClass=ChildEntity sql="SELECT t0.CHILDID1, t0.CHILDID2 FROM CHILDENTITY t0 WHERE (CHILDENTITY.CHILDID1, CHILDENTITY.CHILDID2) NOT IN (SELECT t1.CHILDID1, t1.CHILDID2 FROM PARENTENTITY t2, CHILDENTITY t1 WHERE (((t2.PARENTID1 = ?) AND (t2.PARENTID2 = ?)) AND ((t1.CHILDID2 = t2.CHILDID2) AND (t1.CHILDID1 = t2.CHILDID1))))")
    at org.eclipse.persistence.internal.jpa.QueryImpl.getDetailedException(QueryImpl.java:377)
    at org.eclipse.persistence.internal.jpa.QueryImpl.executeReadQuery(QueryImpl.java:260)
    at org.eclipse.persistence.internal.jpa.QueryImpl.getResultList(QueryImpl.java:468)
    at com.NewClass.main(NewClass.java:27)
Caused by: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: org.postgresql.util.PSQLException: ERROR: invalid reference to FROM-clause entry for table "childentity"
Error Code: 0
Call: SELECT t0.CHILDID1, t0.CHILDID2 FROM CHILDENTITY t0 WHERE (CHILDENTITY.CHILDID1, CHILDENTITY.CHILDID2) NOT IN (SELECT t1.CHILDID1, t1.CHILDID2 FROM PARENTENTITY t2, CHILDENTITY t1 WHERE (((t2.PARENTID1 = ?) AND (t2.PARENTID2 = ?)) AND ((t1.CHILDID2 = t2.CHILDID2) AND (t1.CHILDID1 = t2.CHILDID1))))
    bind => [2 parameters bound]
Query: ReportQuery(referenceClass=ChildEntity sql="SELECT t0.CHILDID1, t0.CHILDID2 FROM CHILDENTITY t0 WHERE (CHILDENTITY.CHILDID1, CHILDENTITY.CHILDID2) NOT IN (SELECT t1.CHILDID1, t1.CHILDID2 FROM PARENTENTITY t2, CHILDENTITY t1 WHERE (((t2.PARENTID1 = ?) AND (t2.PARENTID2 = ?)) AND ((t1.CHILDID2 = t2.CHILDID2) AND (t1.CHILDID1 = t2.CHILDID1))))")
    at org.eclipse.persistence.exceptions.DatabaseException.sqlException(DatabaseException.java:340)
    at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:679)
Caused by: org.postgresql.util.PSQLException: ERROR: invalid reference to FROM-clause entry for table "childentity"
    at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1592)
    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1327)

PostgreSQL 查询）SELECT t0.CHILDID1, t0.CHILDID2 FROM CHILDENTITY t0 WHERE (CHILDENTITY.CHILDID1, CHILDENTITY.CHILDID2) NOT IN (SELECT t1.CHILDID1, t1.CHILDID2 FROM PARENTENTITY t2, CHILDENTITY t1 WHERE (((t2.PARENTID1 = ?) AND (t2.PARENTID2 = ?)) AND ((t1.CHILDID2 = t2.CHILDID2) AND (t1.CHILDID1 = t2.CHILDID1))))

输出-

ERROR:  invalid reference to FROM-clause entry for table "childentity"
LINE 3: ....CHILDID1, t0.CHILDID2 FROM CHILDENTITY t0 WHERE (CHILDENTIT...
                                                             ^
HINT:  Perhaps you meant to reference the table alias "t0".

********** Error **********

ERROR: invalid reference to FROM-clause entry for table "childentity"
SQL state: 42P01
Hint: Perhaps you meant to reference the table alias "t0".
Character: 62

更新了 Postgresql 查询）——别名 CHILDENTITY 被 t0 替换，然后完美运行——

 SELECT t0.CHILDID1, t0.CHILDID2 FROM CHILDENTITY t0 WHERE (t0.CHILDID1, t0.CHILDID2) NOT IN (SELECT t1.CHILDID1, t1.CHILDID2 FROM PARENTENTITY t2, CHILDENTITY t1 WHERE (((t2.PARENTID1 = ?) AND (t2.PARENTID2 = ?)) AND ((t1.CHILDID2 = t2.CHILDID2) AND (t1.CHILDID1 = t2.CHILDID1))))
于 2013-06-18T06:48:09.917 回答