[jira] [Commented] (JENA-205) Streaming results for CONSTRUCT queries

["Andy Seaborne (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JENA-205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13442594#comment-13442594 ] 

Andy Seaborne commented on JENA-205:
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Is this finished and closable?  or maybe split out remaining items and create new JIRA?
                
> Streaming results for CONSTRUCT queries
> ---------------------------------------
>
>                 Key: JENA-205
>                 URL: https://issues.apache.org/jira/browse/JENA-205
>             Project: Apache Jena
>          Issue Type: Improvement
>          Components: ARQ, Fuseki
>            Reporter: Stephen Allen
>            Assignee: Stephen Allen
>            Priority: Minor
>
> It would be useful to have CONSTRUCT queries that streamed results.  An additional method on QueryExecution that returned an Iterator<Statement> (or something similar to that [1]) would provide the necessary access.
> Implementationwise, the application of Bindings to the CONSTRUCT template is already streaming, we would simply need to perform a distinct operation on the Triples that are created.  We could use a DistinctDataNet to get semi-streaming with spill-to-disk functionality.
> Additionally, for this to be useful for Fuseki, we also need an RDF/XML serializer that can operate on an Iterator<Statement> instead of a Model.
> [1] Prefix mappings would probably be nice for serializers that consume this iterator.

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