Solr Query Processing Detail

[John Bickerstaff]

Hi all,

I have a question about whether sub-queries in Solr requestHandlers go
against the total index or against the results of the previous query.

Here's a simple example:

<requestHandler name="/test1" class="solr.SearchHandler">

        <str name="Query1">  {!edismax qf=blah, blah}</str>

        <str name="Query2">  {!edismax qf=blah, blah}</str>

</requestHandler>

My question is:

What does Query2 run "against"?
  a. The entire Solr Index
  b. The results of Query1

If this is clearly documented anywhere, I'm very interested in a link.

Thanks