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  1. Solr
  2. SOLR-5378

Suggester Version 2

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    • New Feature
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 4.7, 6.0
    • search
    • None


      The idea is to add a new Suggester Component that will eventually replace the Suggester support through the SpellCheck Component.
      This will enable Solr to fully utilize the Lucene suggester module (along with supporting most of the existing features) in the following ways:

      • Dictionary pluggability (give users the option to choose the dictionary implementation to use for their suggesters to consume)
      • Map the suggester options/ suggester result format (e.g. support for payload)
      • The new Component will also allow us to have "beefier" Lookup support instead of resorting to collation and such. (Move computation from query time to index time) with more freedom

      In addition to this, this suggester version should also have support for distributed support, which was awkward at best with the previous implementation due to SpellCheck requirements.

      Config (index time) options:

      • name - name of suggester
      • sourceLocation - external file location (for file-based suggesters)
      • lookupImpl - type of lookup to use [default JaspellLookupFactory]
      • dictionaryImpl - type of dictionary to use (lookup input) [default
        (sourceLocation == null ? HighFrequencyDictionaryFactory : FileDictionaryFactory)]
      • storeDir - location to store in-memory data structure in disk
      • buildOnCommit - command to build suggester for every commit
      • buildOnOptimize - command to build suggester for every optimize

      Query time options:

      • suggest.dictionary - name of suggester to use
      • suggest.count - number of suggestions to return
      • suggest.q - query to use for lookup
      • suggest.build - command to build the suggester
      • suggest.reload - command to reload the suggester

      Example query:


      Distributed query:


      Example Response:

        <lst name="responseHeader">
          <int name="status">0</int>
          <int name="QTime">28</int>
        <str name="command">build</str>
        <result name="response" numFound="0" start="0" maxScore="0.0"/>
        <lst name="suggest">
          <lst name="suggestions">
            <lst name="e">
              <int name="numFound">2</int>
              <lst name="suggestion">
                <str name="term">electronics and computer1</str>
                <long name="weight">2199</long>
                <str name="payload"/>
              <lst name="suggestion">
                <str name="term">electronics</str>
                <long name="weight">649</long>
                <str name="payload"/>

      Example config file:

      • Using DocumentDictionary and FuzzySuggester
        • Suggestion on product_name sorted by popularity with the additional product_id in the payload
        <searchComponent class="solr.SuggestComponent" name="suggest">
            <lst name="suggester">
              <str name="name">suggest_fuzzy_doc_dict</str>
              <str name="lookupImpl">FuzzyLookupFactory</str>
              <str name="dictionaryImpl">DocumentDictionaryFactory</str>
              <str name="field">product_name</str>
              <str name="weightField">popularity</str>
              <str name="payloadField">product_id</str>
              <str name="storeDir">suggest_fuzzy_doc_dict_payload</str>
              <str name="suggestAnalyzerFieldType">text</str>
      • Using DocumentExpressionDictionary and FuzzySuggester
        • Suggestion on product_name sorted by the expression "((price * 2) + ln(popularity))" (where both price and popularity are fields in the document)
          <searchComponent class="solr.SuggestComponent" name="suggest">
            <lst name="suggester">
              <str name="name">suggest_fuzzy_doc_expr_dict</str>
              <str name="dictionaryImpl">DocumentExpressionDictionaryFactory</str>
              <str name="lookupImpl">FuzzyLookupFactory</str>
              <str name="field">product_name</str>
              <str name="weightExpression">((price * 2) + ln(popularity))</str>
              <str name="sortField">weight</str>
              <str name="sortField">price</str>
              <str name="strtoreDir">suggest_fuzzy_doc_expr_dict</str>
              <str name="suggestAnalyzerFieldType">text</str>


        1. SOLR-5378.patch
          88 kB
          Shalin Shekhar Mangar
        2. SOLR-5378.patch
          86 kB
          Areek Zillur
        3. SOLR-5378.patch
          90 kB
          Varun Thacker
        4. SOLR-5378.patch
          87 kB
          Areek Zillur
        5. SOLR-5378.patch
          87 kB
          Areek Zillur
        6. SOLR-5378.patch
          86 kB
          Areek Zillur
        7. SOLR-5378.patch
          85 kB
          Areek Zillur
        8. SOLR-5378.patch
          85 kB
          Areek Zillur
        9. SOLR-5378.patch
          84 kB
          Areek Zillur
        10. SOLR-5378.patch
          85 kB
          Areek Zillur
        11. SOLR-5378.patch
          77 kB
          Areek Zillur
        12. SOLR-5378.patch
          63 kB
          Areek Zillur
        13. SOLR-5378.patch
          67 kB
          Areek Zillur
        14. SOLR-5378-maven-fix.patch
          1 kB
          Shalin Shekhar Mangar

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            shalin Shalin Shekhar Mangar
            areek Areek Zillur
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