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https://issues.apache.org/jira/browse/JENA-22?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12976113#action_12976113
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Damian Steer edited comment on JENA-22 at 12/31/10 5:51 AM:
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This patch implements support for OpGroup in OpAsQuery. It's a little
convoluted for two reasons:
1. Projecting expressions has to be handled right at the end. Project is
typically visited before grouping, and setting project twice for a variable
causes an error.
2. Simple counts involve an internal variable assignment. I've tried to catch
this, but it's not elegant or general.
Tests are included.
was (Author: shellac):
This patch implements support for OpGroup in OpAsQuery. It's a little
convoluted for two reasons:
1. Projecting expressions has to be handled right at the end. Project is
typical visited before grouping, and setting project twice for a variable
causes an error.
2. Simple counts involve an internal variable assignment. I've tried to catch
this, but it's not elegant or general.
Tests are included.
> OpAsQuery doesn't support OpGroup
> ---------------------------------
>
> Key: JENA-22
> URL: https://issues.apache.org/jira/browse/JENA-22
> Project: Jena
> Issue Type: Bug
> Components: ARQ
> Reporter: Damian Steer
> Assignee: Andy Seaborne
> Attachments: OpAsQuery_group.patch
>
>
> OpAsQuery can't create some fairly straightforward queries, for example
> select (count(*) as ?cs) { ?s ?p ?o }.
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