Mailing-List: contact solr-commits-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: solr-dev@lucene.apache.org
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: quoted-printable
From: Apache Wiki <wikidiffs@apache.org>
To: Apache Wiki <wikidiffs@apache.org>
Date: Sat, 17 Sep 2011 18:32:03 -0000
Message-ID: <20110917183203.47286.92148@eos.apache.org>
Subject: 
 =?utf-8?q?=5BSolr_Wiki=5D_Update_of_=22FieldCollapsing=22_by_martijnvg?=
Auto-Submitted: auto-generated

Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Solr Wiki" for chan=
ge notification.

The "FieldCollapsing" page has been changed by martijnvg:
http://wiki.apache.org/solr/FieldCollapsing?action=3Ddiff&rev1=3D37&rev2=3D=
38

  =3D Request Parameters =3D
  ||'''param name''' ||'''param value'''||'''description''' ||
  ||group||true/false||if true, turn on result grouping||
- ||group.field||[fieldname]||Group based on the unique values of a field. =
 The field must currently be single-valued and must be either indexed, or b=
e another field type that has a value source and works in a function query =
- such as [[http://lucene.apache.org/solr/api/org/apache/solr/schema/Extern=
alFileField.html|ExternalFileField]]. Note: for Solr 3.3 the field must by =
a string like field such as StrField or TextField, otherwise a http status =
400 is returned.||
+ ||group.field||[fieldname]||Group based on the unique values of a field. =
 The field must currently be single-valued and must be either indexed, or b=
e another field type that has a value source and works in a function query =
- such as [[http://lucene.apache.org/solr/api/org/apache/solr/schema/Extern=
alFileField.html|ExternalFileField]]. Note: for Solr 3.x versions the field=
 must by a string like field such as StrField or TextField, otherwise a htt=
p status 400 is returned.||
  ||group.func||[function query]||Group based on the unique values of a fun=
ction query. <!> [[Solr4.0]] This parameter only is supported on 4.0||
  ||group.query||[query]||Return a single group of documents that also matc=
h the given query.||
  ||rows||[number]||The number of groups to return. Defaults to 10.||
@@ -151, +151 @@

  =

  Notes:
   * Any number of group commands (group.field, group.func, group.query) ma=
y be specified in a single request.
+  * Grouping is also supported for distributed searches from version <!> [=
[Solr3.5]] and from version <!> [[Solr4.0]]. Currently group.truncate and g=
roup.func are the only parameters that aren't supported for distributed sea=
rches.
  =

  =

  =3D Known Limitations =3D
-  * Distributed search support for result grouping has not yet been implem=
ented. There is a patch available in SOLR-2066, that supports the group.fie=
ld parameter.
   * Support for grouping on a multi-valued field has not yet been implemen=
ted.
   * Further performance improvements are planned soon!
 =20