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https://issues.apache.org/jira/browse/JENA-205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13196809#comment-13196809
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Andy Seaborne commented on JENA-205:
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I guess I don't see execTriples() on the same level as execConstruct(). I see
it as a lower level mechanism to give streaming where Iterator<Triple> is not
claiming to be a graph. That is, it is knowingly non-standard.
We could useful change execConstruct() (but not execConstruct(Model)) so it
uses the data bag machinery.
UNREDUCED would be a possible keyword choice :-)
> Streaming results for CONSTRUCT queries
> ---------------------------------------
>
> Key: JENA-205
> URL: https://issues.apache.org/jira/browse/JENA-205
> Project: 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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