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https://issues.apache.org/jira/browse/JENA-976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14602631#comment-14602631
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ASF subversion and git services commented on JENA-976:
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Commit 3cca1500c8c7edcd8de7c9c66c71ad724bae0395 in jena's branch
refs/heads/master from [~andy.seaborne]
[ https://git-wip-us.apache.org/repos/asf?p=jena.git;h=3cca150 ]
JENA-976 : Syntax manipulation by rewrite transformations.
> Provide machinery for syntax manipulation
> -----------------------------------------
>
> Key: JENA-976
> URL: https://issues.apache.org/jira/browse/JENA-976
> Project: Apache Jena
> Issue Type: Improvement
> Components: ARQ
> Reporter: Andy Seaborne
> Assignee: Andy Seaborne
> Fix For: Jena 3.0.0
>
>
> Jena ARQ does a lot of algebra manipulation (for example, the high level
> optimizer is a collection of algebra transformation rules).
> Sometimes, manipulation of query syntax is needed. Examples include rewriting
> a query with a specific variable replaced by a constant term, or simplying
> syntax after applying {{OpAsQuery}} (for safety, it adds some additonal "{ }"
> around query parts and these can only be removed in-context; that means a
> pass over a built query to detect and improve the syntax tree.
> This task is to add a framework for query syntax manipulation.
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