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From "Vermeulen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (OPENJPA-2251) EXISTS with subquery from superclass generates SQL with syntax error
Date Thu, 16 Aug 2012 09:43:37 GMT
Vermeulen created OPENJPA-2251:
----------------------------------

             Summary: EXISTS with subquery from superclass generates SQL with syntax error
                 Key: OPENJPA-2251
                 URL: https://issues.apache.org/jira/browse/OPENJPA-2251
             Project: OpenJPA
          Issue Type: Bug
    Affects Versions: 2.2.0
            Reporter: Vermeulen



I have an abstract entity Booking with @Inheritance(strategy = InheritanceType.TABLE_PER_CLASS).
It has a ManyToOne relation with Event.

The following JPQL query generates SQL with a syntax error:

SELECT z FROM Event z WHERE EXISTS (
   SELECT booking.id FROM Booking booking 
   WHERE booking.event = z AND booking.remarks = :REMARKS
)

org.apache.openjpa.lib.jdbc.ReportingSQLException: Incorrect syntax near the keyword 'FROM'.
{prepstmnt 17234903 
SELECT t0.id, ...(many more columns)..., t0.USERCREATED_ID 
FROM booking_Event t0 LEFT OUTER JOIN booking_OccasionType t1 ON t0.OCCASIONTYPE_ID = t1.id
WHERE (EXISTS (SELECT  FROM  WHERE ( AND )))} [code=156, state=S0001]

When I replace Booking with the name of a concrete subclass the query executes fine.
When I execute only the subquery as a normal query it executes fine:
   SELECT booking.id FROM Booking booking 
   WHERE booking.event.id = :eventId AND booking.remarks = :REMARKS
   
When I replace the parameter :REMARKS with a Collection-valued parameter like so "booking.remarks
IN :REMARKS", I get a weird
ClassCastException:

Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to [Ljava.lang.Object;
	at org.apache.openjpa.jdbc.kernel.exps.InExpression.orContains(InExpression.java:178)
	at org.apache.openjpa.jdbc.kernel.exps.InExpression.appendTo(InExpression.java:122),
....

Again when I replace Booking with the name of a concrete subclass the query executes fine.

I think this may be related to OPENJPA-681 and OPENJPA-658 which have already been resolved,
but perhaps the problem still exists when querying on a superclass.

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