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Posted to solr-user@lucene.apache.org by Michael Ryan <mr...@moreover.com> on 2011/06/17 05:46:34 UTC
omitTermFreqAndPositions in a TextField fieldType
Is it possible to use omitTermFreqAndPositions="true" in a <fieldType> declaration that uses class="solr.TextField"? I've tried doing this and it does not seem to work (i.e., the prx file size does not change). Using it in a <field> declaration does work, but I'd rather set it in the <fieldType> so I don't have to repeat it multiple times in my schema.
>From my schema.xml file:
<fieldType name="foobar" class="solr.TextField" sortMissingLast="true"
omitNorms="true" omitTermFreqAndPositions="true" indexed="true"
stored="true" positionIncrementGap="100">
<analyzer>
<tokenizer class="solr.KeywordTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
</fieldType>
In the TextField class I found that it disables OMIT_TF_POSITIONS, which I'm assuming is the cause of my problem:
if (schema.getVersion()> 1.1f) properties &= ~OMIT_TF_POSITIONS;
Does it even make sense to use omitTermFreqAndPositions for a TextField, or am I perhaps doing something I shouldn't be?
-Michael
Re: omitTermFreqAndPositions in a TextField fieldType
Posted by Ahmet Arslan <io...@yahoo.com>.
> Does it even make sense to use omitTermFreqAndPositions for
> a TextField, or am I perhaps doing something I shouldn't
> be?
Yes it makes sense to disable tf, positions and norms if you don't need them. For example, I have this category_name field where its definition includes:
omitNorms="true" omitTermFreqAndPositions="true"
I don't need PhraseQuery, lenght normalization, index time boost, etc.
I only display three (rows=3) category names for a given query.