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From Andrus Adamchik <and...@objectstyle.org>
Subject Re: Latest code snapshot breaks EJBQLQuery
Date Fri, 05 Dec 2008 14:18:27 GMT
Yeah, this part of the stack has undergone a major rework lately.  
Although the fact that you had to use this workaround to begin with is  
already suspect. Let me try this query out and see what's going on.

Andrus


On Dec 5, 2008, at 9:52 AM, Dave Dombrosky wrote:

> A query that runs fine for me (with a strange workaround) in r721197,
> is failing in the latest code from cayenne trunk (r723425 as of this
> writing).  I am running it as an EJBQLQuery using
> DataContext.performQuery(Query arg).
>
> The query looks something like the following "SELECT COUNT(a),
> a.relationship, a.relationship.attr, a.relationship.attr FROM ObjName
> a GROUP BY a.relationship, a.relationship.attr, a.relationship.attr".
> With the older cayenne library, I had to get "a.relationship.attr" a
> second time in the select and group lists, because cayenne was not
> returning the final result column to me.  This was a decent workaround
> for a while, but now this query won't even execute with the new
> cayenne library!
>
> With the latest cayenne code, I am seeing the following error:
>
> Caused by: java.lang.ArrayIndexOutOfBoundsException: 3
> 	at  
> org 
> .apache 
> .cayenne.access.jdbc.ScalarRowReader.<init>(ScalarRowReader.java:40)
> 	at  
> org 
> .apache 
> .cayenne 
> .access 
> .jdbc.JDBCResultIterator.createRowReader(JDBCResultIterator.java:123)
> 	at  
> org 
> .apache 
> .cayenne 
> .access.jdbc.JDBCResultIterator.<init>(JDBCResultIterator.java:83)
> 	at  
> org 
> .apache 
> .cayenne 
> .access 
> .jdbc.SQLTemplateAction.processSelectResult(SQLTemplateAction.java: 
> 223)
> 	at  
> org 
> .apache 
> .cayenne 
> .access.jdbc.SQLTemplateAction.execute(SQLTemplateAction.java:171)
> 	at  
> org 
> .apache 
> .cayenne 
> .access.jdbc.SQLTemplateAction.performAction(SQLTemplateAction.java: 
> 127)
> 	at  
> org 
> .apache 
> .cayenne.access.jdbc.EJBQLAction.performAction(EJBQLAction.java:101)
> 	at  
> org 
> .apache 
> .cayenne 
> .access.DataNodeQueryAction.runQuery(DataNodeQueryAction.java:57)
> 	at org.apache.cayenne.access.DataNode.performQueries(DataNode.java: 
> 236)
>
> I tried removing some parts of the query, and it seems like I can run
> the query if I remove the "a.relationship" part of it, but i need this
> to get the PK of the referenced object.  Is there some way to
> reference the DB Path of this instead of my current method?  It
> doesn't seem like db path expressions are supported for EJBQLQuery
> yet...
>
> -Dave
>


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