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From "Joel Bernstein (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-5829) Allow ExpandComponent to accept query and filter query parameters
Date Sat, 08 Mar 2014 16:30:42 GMT

     [ https://issues.apache.org/jira/browse/SOLR-5829?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Joel Bernstein updated SOLR-5829:
---------------------------------

    Attachment:     (was: SOLR-5829.patch)

> Allow ExpandComponent to accept query and filter query parameters
> -----------------------------------------------------------------
>
>                 Key: SOLR-5829
>                 URL: https://issues.apache.org/jira/browse/SOLR-5829
>             Project: Solr
>          Issue Type: New Feature
>          Components: SearchComponents - other
>            Reporter: Joel Bernstein
>             Fix For: 4.8
>
>         Attachments: SOLR-5829.patch
>
>
> By default the ExpandComponent re-runs both the main query and filter queries to expand
the groups. This ticket allows you to pass the main query and filter queries into the ExpandComponent.
It also allows you to pass in the expand field.
> This design allows the ExpandComponent to operate independently of the CollapsingQParserPlugin
and allows for modeling of parent/child relationships. 
> For example:
> {code}
> q=*:*&fq=type:parent&expand=true&expand.field=group_id&expand.q=*:*&expand.fq=type:child
> {code}
> In the query above the the main query returns all documents of the type:parent. The ExpandComponent
then expands the groups by retrieving all documents with type:child and grouping them by the
group_id.
> In other words, the main result set will be the parent documents and the expanded result
set will be the child documents.
> You could reverse this as well:
> {code}
> q=*:*&fq=type:child&fq={!collapse field=group_id}&expand=true&expand.field=group_id&expand.q=*:*&expand.fq=type:parent
> {code}
> In the query above the main query returns all documents with type:child and collapses
them on the group_id field. The ExpandComponent then expands the groups by retrieving all
documents with type:parent and groups them by group_id. Since there is only one parent per
collapsed child, each group will have one document 1 document.
> In this case the main result set will be collapsed child documents and the expanded results
will be parent documents.



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