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From "Martijn van Groningen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-1093) A RequestHandler to run multiple queries in a batch
Date Tue, 31 May 2011 17:57:48 GMT

    [ https://issues.apache.org/jira/browse/SOLR-1093?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13041710#comment-13041710
] 

Martijn van Groningen commented on SOLR-1093:
---------------------------------------------

Currently with grouping one might be able to achieve something similar. Queries are not executed
in parallel, but it is something you can already use in Solr 4.0.

Just specify group.query parameter multiple times. E.g.
group=true&group.query=brand:sumsung&group.query=category:phones

> A RequestHandler to run multiple queries in a batch
> ---------------------------------------------------
>
>                 Key: SOLR-1093
>                 URL: https://issues.apache.org/jira/browse/SOLR-1093
>             Project: Solr
>          Issue Type: New Feature
>          Components: search
>            Reporter: Noble Paul
>            Assignee: Simon Willnauer
>             Fix For: 3.2
>
>
> It is a common requirement that a single page requires to fire multiple queries .In cases
where these queries are independent of each other. If there is a handler which can take in
multiple queries , run them in paralll and send the response as one big chunk it would be
useful
> Let us say the handler is  MultiRequestHandler
> {code}
> <requestHandler name="/multi" class="solr.MultiRequestHandler"/>
> {code}
> h2.Query Syntax
> The request must specify the no:of queries as count=n
> Each request parameter must be prefixed with a number which denotes the query index.optionally
,it may can also specify the handler name.
> example
> {code}
> /multi?count=2&1.handler=/select&1.q=a:b&2.handler=/select&2.q=a:c
> {code}
> default handler can be '/select' so the equivalent can be
> {code} 
> /multi?count=2&1.q=a:b&2.q=a:c
> {code}
> h2.The response
> The response will be a List<NamedList> where each NamedList will be a response
to a query. 

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