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https://issues.apache.org/jira/browse/SOLR-1566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12897544#action_12897544
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Grant Ingersoll commented on SOLR-1566:
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I know this sounds simple and maybe I'm missing something, but why can't we
have a simple data structure that is attached to the SolrResponse and then in
the ResponseWriters, (pretty much where it adds the Score onto the item) it
looks up the document in the data structure (it's likely a Map where the key is
the doc id and the value is a list of values to add to the doc) and then adds
the fields, optionally marking them as "pseudo" or annotative fields? I can't
imagine the memory usage would get out of hand unless you are retrieving a
large number of docs (but then you have memory issues anyway) and it is
short-lived so it likely never proceeds out of Eden memory anyway. Everybody
already has access to the SolrResponse to some extent. For those who want, we
could likely make it a configuration item such that even the holding Map isn't
created, but that likely isn't too big of a deal.
Thoughts?
> Allow components to add fields to outgoing documents
> ----------------------------------------------------
>
> Key: SOLR-1566
> URL: https://issues.apache.org/jira/browse/SOLR-1566
> Project: Solr
> Issue Type: New Feature
> Components: search
> Reporter: Noble Paul
> Fix For: Next
>
> Attachments: SOLR-1566.patch, SOLR-1566.patch, SOLR-1566.patch,
> SOLR-1566.patch
>
>
> Currently it is not possible for components to add fields to outgoing
> documents which are not in the the stored fields of the document. This makes
> it cumbersome to add computed fields/metadata .
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