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https://issues.apache.org/jira/browse/JENA-267?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13889374#comment-13889374
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Rob Vesse commented on JENA-267:
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There are a few TODOs left in the code some of which at least need to be
implemented. Particularly the one in {{preParse()}} where we should be
deriving the variables available in the case where the initial buffering finds
all results without seeing the header yet.
> SPARQL JSON Parser is not streaming
> -----------------------------------
>
> Key: JENA-267
> URL: https://issues.apache.org/jira/browse/JENA-267
> Project: Apache Jena
> Issue Type: Improvement
> Components: ARQ
> Affects Versions: ARQ 2.9.1
> Reporter: Rob Vesse
> Assignee: Rob Vesse
> Labels: json, sparql
>
> The current SPARQL JSON parser in ARQ parses the JSON by parsing the entire
> response into a in-memory data structure and then iterating over that. So
> for large results it is trivial to hit an OutOfMemory exception.
> This task is to reimplement the SPARQL JSON parser to be fully streaming in
> its implementation in line with all the other results parsers
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