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From "Vermeulen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OPENJPA-2251) EXISTS with subquery from superclass generates SQL with syntax error
Date Thu, 16 Aug 2012 09:45:37 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-2251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13435859#comment-13435859
] 

Vermeulen commented on OPENJPA-2251:
------------------------------------

I just noticed that OPENJPA-658 is not resolved yet. Perhaps this is another manifestation
of that issue.
                
> 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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