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https://issues.apache.org/jira/browse/SOLR-12697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17353740#comment-17353740
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Tom Gilke commented on SOLR-12697:
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Hi [~cpoerschke].
Thank you very much for the detailed explanation of your thoughts. Now I
understand your ideas.
{quote}What do you think?
{quote}
I experimented with your ideas a bit this morning and now have a first draft
for a {{PrefetchingFieldValueFeature}} that produces the same results as the
{{FieldValueFeature}} for stored fields.
I _think_ the caching of the fields works (this is based on some debugging of
the CaffeineCache), but I did not write any tests yet, other than copying the
TestLTROnSolrCloud-test to perform the sanity check I described above.
Should we create the Jira ticket for that under the umbrella of
https://issues.apache.org/jira/browse/SOLR-12688 ?
> 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
> Assignee: Christine Poerschke
> Priority: Major
> Fix For: main (9.0), 8.9
>
> Attachments: SOLR-12697.patch, SOLR-12697.patch, SOLR-12697.patch,
> SOLR-12697.patch, SOLR-12697.patch
>
> Time Spent: 8h 20m
> Remaining Estimate: 0h
>
> [~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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