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From atawfik <>
Subject Re: Join and non-Join query give different results
Date Sun, 20 Jul 2014 05:38:15 GMT
I have figured it out. 

The reason is simply the type of join in Solr. It is an outer join. Since
both filter queries are executed separately, a house that has available
documents with discount > 1 or (sd_year:2014 AND sd_month:11) will be
returned even though my intention was applying bother conditions at the same

However, in the second case, both conditions are applied at same time to
find available documents, then houses based on the matching available
documents are returned. Since there is no any available document that
satisfies both conditions, then there is no any matching house which gives
zero results.

It really took sometime to figure this out, I hope this will help someone

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