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https://issues.apache.org/jira/browse/SOLR-1682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yonik Seeley updated SOLR-1682:
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Attachment: SOLR-1682_prototype.patch
Here's an early prototype of mine, updated to trunk. It's designed to
collapsing on an arbitrary function (value source). It only implements the
first-phase level-1 collapsing, and assumes a single comparator for simplicity.
The previous patches here (which I've just now started looking at) look pretty
solid. It's surprising how similar the first level collapse is (how a single
field comparator group used for everything, defer building the treeset, etc).
I have some time to work on this now... I think I'll approach it by merging
this patch with mine, working on getting a single collapse option working well
enough to commit. The original SOLR-236 is simply too big and it feels like
there are too many options to grapple with at the same time.
> Implement CollapseComponent
> ---------------------------
>
> Key: SOLR-1682
> URL: https://issues.apache.org/jira/browse/SOLR-1682
> Project: Solr
> Issue Type: Sub-task
> Components: search
> Reporter: Martijn van Groningen
> Assignee: Shalin Shekhar Mangar
> Fix For: Next
>
> Attachments: field-collapsing.patch, SOLR-1682.patch,
> SOLR-1682.patch, SOLR-1682_prototype.patch, SOLR-236.patch
>
>
> Child issue of SOLR-236. This issue is dedicated to field collapsing in
> general and all its code (CollapseComponent, DocumentCollapsers and
> CollapseCollectors). The main goal is the finalize the request parameters and
> response format.
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