[jira] Commented: (SOLR-705) Distributed search should optionally return docID->shard map

["Ryan McKinley (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-705?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12703286#action_12703286 ] 

Ryan McKinley commented on SOLR-705:
------------------------------------

I like the concept -- it could help for many things, and make some client code a bit easier.

The simple use case is to _augment_ each document with fields that do not exist in the schema.  This could be things like the shard, the score, a calculation (perhaps the output of a function query)

This may also be someplace to consider putting other information that currently requires correlation-by-id.  Consider highlighting, MLT, some debug info...



> Distributed search should optionally return docID->shard map
> ------------------------------------------------------------
>
>                 Key: SOLR-705
>                 URL: https://issues.apache.org/jira/browse/SOLR-705
>             Project: Solr
>          Issue Type: Improvement
>    Affects Versions: 1.3
>         Environment: all
>            Reporter: Brian Whitman
>             Fix For: 1.4
>
>         Attachments: SOLR-705.patch, SOLR-705.patch, SOLR-705.patch, SOLR-705.patch, SOLR-705.patch
>
>
> SOLR-303 queries with &shards parameters set need to return the dociD->shard mapping in the response. Without it, updating/deleting documents when the # of shards is variable is hard. We currently set this with a special requestHandler that filters /update and inserts the shard as a field in the index but it would be better if the shard location came back in the query response outside of the index.

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