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From "Andy Seaborne (Updated) (JIRA)" <>
Subject [jira] [Updated] (JENA-211) DISTINCT isn't distinct in the presence of anon variables.
Date Thu, 16 Feb 2012 19:56:59 GMT


Andy Seaborne updated JENA-211:

    Attachment: jena-211-distinct.patch


The bug is not to do with the distinct code per-se.  It's the binding it is asked to process
- it should have unnamed variables hidden.

I changed QueryIterDistinct to use the common QueryIterDistinctReduced mechanism so the mechanism
can be shared by "reduced" and "distinct".

Patch attached for reference - I have applied it because it blocking other work.


> DISTINCT isn't distinct in the presence of anon variables.
> ----------------------------------------------------------
>                 Key: JENA-211
>                 URL:
>             Project: Jena
>          Issue Type: Bug
>          Components: ARQ
>    Affects Versions: ARQ 2.9.0
>            Reporter: Andy Seaborne
>            Assignee: Andy Seaborne
>         Attachments: jena-211-distinct.patch
> The DISTINCT (and REDUCED) iterators don't mask hidden variables (bnodes and rewrite-introducded
hdden variables)

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