Package com.yahoo.search.grouping

Class UniqueGroupingSearcher

java.lang.Object
com.yahoo.component.AbstractComponent
com.yahoo.component.chain.ChainedComponent
com.yahoo.processing.Processor
com.yahoo.search.Searcher
com.yahoo.search.grouping.UniqueGroupingSearcher
All Implemented Interfaces:
com.yahoo.component.chain.model.Chainable, com.yahoo.component.Component, com.yahoo.component.Deconstructable, Comparable<com.yahoo.component.Component>
public class UniqueGroupingSearcher extends Searcher
Implements 'unique' using a grouping expression. It doesn't work for multi-level sorting.
Author:
andreer

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final com.yahoo.processing.request.CompoundName
    PARAM_UNIQUE
     

    Fields inherited from class com.yahoo.component.AbstractComponent

    isDeconstructable

  • Constructor Summary

    Constructors
    Constructor
    Description
    UniqueGroupingSearcher()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    Result
    search(Query query, Execution execution)
    Implements the deprecated "unique" api for deduplication by using grouping.

    Methods inherited from class com.yahoo.search.Searcher

    ensureFilled, fill, getLogger, process, toString

    Methods inherited from class com.yahoo.component.chain.ChainedComponent

    getDependencies, initDependencies

    Methods inherited from class com.yahoo.component.AbstractComponent

    clone, compareTo, deconstruct, getClassName, getId, getIdString, hasInitializedId, initId, isDeconstructable, setIsDeconstructable

    Methods inherited from class java.lang.Object

    equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

    Methods inherited from interface com.yahoo.component.chain.model.Chainable

    getAnnotatedDependencies

  • Field Details

    • PARAM_UNIQUE

      public static final com.yahoo.processing.request.CompoundName PARAM_UNIQUE

  • Constructor Details

    • UniqueGroupingSearcher

      public UniqueGroupingSearcher()

  • Method Details

    • search

      public Result search(Query query, Execution execution)
      Implements the deprecated "unique" api for deduplication by using grouping. We create a grouping expression on the field we wish to dedup on (which must be an attribute). Total hits is calculated using the new count unique groups functionality.
      Specified by:
      search in class Searcher
      Parameters:
      query - the query
      Returns:
      the result of making this query