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https://issues.apache.org/jira/browse/SOLR-12697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17340960#comment-17340960
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Christine Poerschke commented on SOLR-12697:
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Hi Everyone.
So from briefly re-reading the notes on this issue so far, we conceptually
have, on a high-level, two separate things here it seems:
* new functionality i.e. support for the {{docValues="true" stored="false"}}
case, and
* optimisation of existing functionality i.e. the {{docValues="true"
stored="true"}} case.
And then on an implementation level two different things:
* how to efficiently support the {{docValues="true" stored="false"}} case, and
* how to optimise the {{docValues="true" stored="true"}} case (possibly but not
necessarily using the same approach as the {{docValues="true" stored="false"}}
solution).
I wonder if it might be helpful to separate the "new functionality" and
"optimisation" aspects e.g. first to figure out the new functionality (and to
maintain existing behaviour for the existing functionality) and then
subsequently to optimise the existing functionality?
> pure DocValues support for FieldValueFeature
> --------------------------------------------
>
> Key: SOLR-12697
> URL: https://issues.apache.org/jira/browse/SOLR-12697
> Project: Solr
> Issue Type: Sub-task
> Components: contrib - LTR
> Reporter: Stanislav Livotov
> Priority: Major
> Attachments: SOLR-12697.patch, SOLR-12697.patch, SOLR-12697.patch,
> SOLR-12697.patch, SOLR-12697.patch
>
>
> [~slivotov] wrote in SOLR-12688:
> bq. ... FieldValueFeature doesn't support pure DocValues fields (Stored
> false). Please also note that for fields which are both stored and DocValues
> it is working not optimal because it is extracting just one field from the
> stored document. DocValues are obviously faster for such usecases. ...
> (Please see SOLR-12688 description for overall context and analysis results.)
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