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Date: Mon, 3 Sep 2012 07:36:06 -0700 (PDT)
From: Ramzi Alqrainy <ramzi.alqrainy@gmail.com>
To: solr-user@lucene.apache.org
Message-ID: <1346682966360-4005059.post@n3.nabble.com>
Subject: Missing Features - AndMaybe and Otherwise
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Hi,

I would like to help me for certain problem. I have encountered a problem i=
n
task I think if you implement the below functions/conditions, you will help
us for many issues. =20

*AndMaybe(a, b)*
Binary query takes results from the first query. If and only if the same
document also appears in the results from the second query, the score from
the second query will be added to the score from the first query.

*Otherwise(a, b)*
A binary query that only matches the second clause if the first clause
doesn=E2=80=99t match any documents.


My problem is :

I have documents and I do group by on certain field (e.g. Field1).  I want
to get documents with Field2 is [3 or 9 or 12] if exist, otherwise get any
document. please see the below example.


D1 :            -----------
Field1 : 1                  -
Field2 : 3                 --------->  D1 (group by on field1 and field2 is
3)
                              -
D2:             -----------
Field1 : 1
Field2 : 4


D3:            -----------
Field1 : 2               -
Field2 : 5                --------------> any document D3 or D4
                            -
D4:            -----------
Field1 : 2
Field2 : 7

I want to get the results like below=20
D1(Mandatory)=20
(D3 OR D4)


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