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Subject: RE: Term no longer matches if PositionLengthAttr is set to two
From: =?utf-8?Q?Markus_Jelsma?= <markus.jelsma@openindex.io>
To: =?utf-8?Q?java-user=40lucene=2Eapache=2Eorg?=
  <java-user@lucene.apache.org>,
 =?utf-8?Q?solr-user?= <solr-user@lucene.apache.org>
Date: Mon, 1 May 2017 10:33:00 +0000
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Message-Id: <zarafa.59070edc.4ded.4d28dacb2da49f38@mail1.ams.nl.openindex.io>
archived-at: Mon, 01 May 2017 10:33:11 -0000

Hello again, apologies for cross-posting and having to get back to this unsolved problem.

Initially i thought this is a problem i have with, or in Lucene. Maybe not, so is this problem in Solr=3F Is here anyone who has seen this problem before=3F

Many thanks,
Markus

-----Original message-----
> From:Markus Jelsma <markus.jelsma@openindex.io>
> Sent: Tuesday 25th April 2017 13:40
> To: java-user@lucene.apache.org
> Subject: Term no longer matches if PositionLengthAttr is set to two
>=20
> Hello,
>=20
> We have a decompounder and recently implemented the PositionLengthAttribute in it and set it to 2 for a two-word compound such as drinkwater (drinking water in dutch). The decompounder runs both at index- and query-time on Solr 6.5.0.
>=20
> The problem is, q=3Dcontent_nl:drinkwater no longer returns documents containing drinkwater when posLenAtt =3D 2 at query time.
>=20
> This is Solr's debug output for drinkwater with posLenAtt =3D 2:
>=20
>     <str name=3D"rawquerystring">content_nl:drinkwater</str>
>     <str name=3D"querystring">content_nl:drinkwater</str>
>     <str name=3D"parsedquery">SynonymQuery(Synonym())</str>
>     <str name=3D"parsedquery_toString">Synonym()</str>
>=20
> This is the output where i reverted the decompounder, thus a posLenAtt =3D 1:
>=20
>     <str name=3D"rawquerystring">content_nl:drinkwater</str>
>     <str name=3D"querystring">content_nl:drinkwater</str>
>     <str name=3D"parsedquery">SynonymQuery(Synonym(content_nl:drink content_nl:drinkwater)) content_nl:water</str>
>     <str name=3D"parsedquery_toString">Synonym(content_nl:drink content_nl:drinkwater) content_nl:water</str>
>=20
> The indexed terms still have posLenAtt =3D 2, but having a posLenAtt =3D 2 at query time seems to be a problem.
>=20
> Any thoughts on this issue=3F Is it a bug=3F Do i not understand PositionLengthAttribute=3F Why does it affect term/document matching=3F At query time but not at index time=3F
>=20
> Many thanks,
> Markus
>=20
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>=20
>=20