Re: Highlighting is not happening

[Sascha Szott]

Hi Prakash,

can you provide

1. the definition of the relevant field
2. your query
3. the definition of the relevant request handler
4. a field value that is stored in your index and should be highlighted

-Sascha

Doddamani, Prakash wrote:

Thanks Sascha,

The "type" for fields for which I am searching are all "text" , and I am
using solr.TextField


<fieldType name="text" class="solr.TextField"
positionIncrementGap="100">
       <analyzer type="index">
         <tokenizer class="solr.WhitespaceTokenizerFactory"/>
         <!-- in this example, we will only use synonyms at query time
         <filter class="solr.SynonymFilterFactory"
synonyms="index_synonyms.txt" ignoreCase="true" expand="false"/>
         -->
         <!-- Case insensitive stop word removal.
              enablePositionIncrements=true ensures that a 'gap' is left
to
              allow for accurate phrase queries.
         -->
         <filter class="solr.StopFilterFactory"
                 ignoreCase="true"
                 words="stopwords.txt"
                 enablePositionIncrements="true"
                 />
         <filter class="solr.WordDelimiterFilterFactory"
generateWordParts="1" generateNumberParts="1" catenateWords="1"
catenateNumbers="1" catenateAll="0" splitOnCaseChange="1"/>
         <filter class="solr.LowerCaseFilterFactory"/>
         <filter class="solr.EnglishPorterFilterFactory"
protected="protwords.txt"/>
         <filter class="solr.RemoveDuplicatesTokenFilterFactory"/>
       </analyzer>
       <analyzer type="query">
         <tokenizer class="solr.WhitespaceTokenizerFactory"/>
         <filter class="solr.SynonymFilterFactory"
synonyms="synonyms.txt" ignoreCase="true" expand="true"/>
         <filter class="solr.StopFilterFactory" ignoreCase="true"
words="stopwords.txt"/>
         <filter class="solr.WordDelimiterFilterFactory"
generateWordParts="1" generateNumberParts="1" catenateWords="0"
catenateNumbers="0" catenateAll="0" splitOnCaseChange="1"/>
         <filter class="solr.LowerCaseFilterFactory"/>
         <filter class="solr.EnglishPorterFilterFactory"
protected="protwords.txt"/>
         <filter class="solr.RemoveDuplicatesTokenFilterFactory"/>
       </analyzer>
     </fieldType>

Regards
Prakash


-----Original Message-----
From: Sascha Szott [mailto:sz...@zib.de]
Sent: Monday, May 24, 2010 10:29 PM
To: solr-user@lucene.apache.org
Subject: Re: Highlighting is not happening

Hi Prakash,

more importantly, check the field type and its associated analyzer. In
case you use a "non-tokenized" type (e.g., string), highlighting will
not appear if only a partial field match exists (only exact matches,
i.e. the query coincides with the field value, will be highlighted). If
that's not your intent, you should at least define an tokenizer for the
field type.

Best,
Sascha

Doddamani, Prakash wrote:

Hey Daren,
Yes the fields for which I am searching are stored and indexed, also
they are returned from the query, Also it is not coming, if the entire

search keyword is part of the field.

Thanks
Prakash

-----Original Message-----
From: dar...@ontrenet.com [mailto:dar...@ontrenet.com]
Sent: Monday, May 24, 2010 9:32 PM
To: solr-user@lucene.apache.org
Subject: Re: Highlighting is not happening

Check that the field you are highlighting on is "stored". It won't
work otherwise.


Now, this also means that the field is returned from the query. For
large text fields to be highlighted only, this means the entire text
is returned for each result.


There is a pending feature to address this, that allows you to tell
Solr to NOT return a specific field (to avoid unecessary transfer of
large text fields in this scenario).

Darren

Hi



I am using dismax request handler, I wanted to highlight the search
field,

So added

<str name="hl">true</str>

I was expecting like if I search for keyword "Akon" resultant docs
wherever the Akon is available is bold.



But I am not seeing them getting bold, could some one tell me the
real

path where I should tune

If I pass explicitly the hl=true does not work



I have added the request handler



<requestHandler name="dismax" class="solr.SearchHandler">
      <lst name="defaults">
       <str name="defType">dismax</str>
       <str name="echoParams">explicit</str>
       <float name="tie">0.01</float>
       <str name="qf">
    name^20.0 coming^5 playing^4 keywords^0.1
       </str>
    <str name="bf">
          rord(isclassic)^0.5 ord(listeners)^0.3
       </str>
    <str name="*,score">
    name, coming, playing, keywords, score
       </str>
       <str name="mm">
          2&lt;-1 5&lt;-2 6&lt;90%
       </str>
       <int name="ps">100</int>
       <str name="q.alt">*:*</str>
       <!-- example highlighter config, enable per-query with hl=true
-->

       <str name="hl">true</str>
      <!--<str name="hl.simple.pre"><b></str>
               <str name="hl.simple.post"></b></str>   -->
       <!-- for this field, we want no fragmenting, just highlighting

-->

       <str name="f.name.hl.fragsize">0</str>
       <!-- instructs Solr to return the field itself if no query
terms are found -->
       <!--<str name="f.name.hl.alternateField">name</str>   -->
       <str name="f.text.hl.fragmenter">regex</str>   <!-- defined
below

-->

      </lst>
    </requestHandler>

regards
prakash