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    Class OrdFieldSource

    Obtains the ordinal of the field value from the default Lucene FieldCache using StringIndex.

    The native lucene index order is used to assign an ordinal value for each field value.

    Field values (terms) are lexicographically ordered by unicode value, and numbered starting at 1.

    Example:

        If there were only three field values: "apple","banana","pear"
        then ord("apple")=1, ord("banana")=2, ord("pear")=3

    WARNING: Ord depends on the position in an index and can thus change when other documents are inserted or deleted, or if a MultiSearcher is used.

    WARNING: as of Solr 1.4, ord() and rord() can cause excess memory use since they must use a FieldCache entry at the top level reader, while sorting and function queries now use entries at the segment level. Hence sorting or using a different function query, in addition to ord()/rord() will double memory use.

    Inheritance
    System.Object
    ValueSource
    OrdFieldSource
    Inherited Members
    ValueSource.ToString()
    ValueSource.CreateWeight(IDictionary, IndexSearcher)
    ValueSource.NewContext(IndexSearcher)
    ValueSource.GetSortField(Boolean)
    Namespace: Lucene.Net.Queries.Function.ValueSources
    Assembly: Lucene.Net.Queries.dll
    Syntax
    public class OrdFieldSource : ValueSource

    Constructors

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    OrdFieldSource(String)

    Declaration
    public OrdFieldSource(string field)
    Parameters
    Type Name Description
    System.String field

    Fields

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    m_field

    Declaration
    protected readonly string m_field
    Field Value
    Type Description
    System.String

    Methods

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    Equals(Object)

    Declaration
    public override bool Equals(object o)
    Parameters
    Type Name Description
    System.Object o
    Returns
    Type Description
    System.Boolean
    Overrides
    ValueSource.Equals(Object)
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    GetDescription()

    Declaration
    public override string GetDescription()
    Returns
    Type Description
    System.String
    Overrides
    ValueSource.GetDescription()
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    GetHashCode()

    Declaration
    public override int GetHashCode()
    Returns
    Type Description
    System.Int32
    Overrides
    ValueSource.GetHashCode()
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    GetValues(IDictionary, AtomicReaderContext)

    Declaration
    public override FunctionValues GetValues(IDictionary context, AtomicReaderContext readerContext)
    Parameters
    Type Name Description
    IDictionary context
    AtomicReaderContext readerContext
    Returns
    Type Description
    FunctionValues
    Overrides
    ValueSource.GetValues(IDictionary, AtomicReaderContext)
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