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https://issues.apache.org/jira/browse/SOLR-1093?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13659915#comment-13659915
 ] 

yuanyun.cn commented on SOLR-1093:
----------------------------------

Just found one small issue in the code.
If we put several fq for one query, only one will be used, for example: 
1.fq=datatype:4&1.fq=filetype:pdf.

To fix this, just need change code below:
org.apache.solr.handler.component.MultiSearchHandler.initRequestParams(SolrQueryRequest,
 Vector<SimpleOrderedMap<Object>>, SimpleOrderedMap<Object>)
+        int startPos = paramName.indexOf('.') + 1;
+        localRequestParams.elementAt(queryId - 1).add(
+            paramName.substring(startPos), reqParams.get(paramName));


Should be changed to:
int startPos = paramName.indexOf('.') + 1;

String[] paramsValues = reqParams.getParams(paramName);
if(paramsValues!=null)
{
  for(String value: paramsValues)
  {
        localRequestParams.elementAt(queryId - 1).add(
                paramName.substring(startPos),value);
  }

                
> 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
>         Attachments: SOLR-1093.patch
>
>
> 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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