Marvin Humphrey

NAME

KinoSearch1::InvIndexer - build inverted indexes

SYNOPSIS

    use KinoSearch1::InvIndexer;
    use KinoSearch1::Analysis::PolyAnalyzer;

    my $analyzer
        = KinoSearch1::Analysis::PolyAnalyzer->new( language => 'en' );

    my $invindexer = KinoSearch1::InvIndexer->new(
        invindex => '/path/to/invindex',
        create   => 1,
        analyzer => $analyzer,
    );

    $invindexer->spec_field( 
        name  => 'title' 
        boost => 3,
    );
    $invindexer->spec_field( name => 'bodytext' );

    while ( my ( $title, $bodytext ) = each %source_documents ) {
        my $doc = $invindexer->new_doc($title);

        $doc->set_value( title    => $title );
        $doc->set_value( bodytext => $bodytext );

        $invindexer->add_doc($doc);
    }

    $invindexer->finish;

DESCRIPTION

The InvIndexer class is KinoSearch1's primary tool for creating and modifying inverted indexes, which may be searched using KinoSearch1::Searcher.

METHODS

new

    my $invindexer = KinoSearch1::InvIndexer->new(
        invindex => '/path/to/invindex',  # required
        create   => 1,                    # default: 0
        analyzer => $analyzer,            # default: no-op Analyzer
    );

Create an InvIndexer object.

spec_field

    $invindexer->spec_field(
        name       => 'url',      # required
        boost      => 1,          # default: 1,
        analyzer   => undef,      # default: analyzer spec'd in new()
        indexed    => 0,          # default: 1
        analyzed   => 0,          # default: 1
        stored     => 1,          # default: 1
        compressed => 0,          # default: 0
        vectorized => 0,          # default: 1
    );

Define a field.

  • name - the field's name.

  • boost - A multiplier which determines how much a field contributes to a document's score.

  • analyzer - By default, all indexed fields are analyzed using the analyzer that was supplied to new(). Supplying an alternate for a given field overrides the primary analyzer.

  • indexed - index the field, so that it can be searched later.

  • analyzed - analyze the field, using the relevant Analyzer. Fields such as "category" or "product_number" might be indexed but not analyzed.

  • stored - store the field, so that it can be retrieved when the document turns up in a search.

  • compressed - compress the stored field, using the zlib compression algorithm.

  • vectorized - store the field's "term vectors", which are required by KinoSearch1::Highlight::Highlighter for excerpt selection and search term highlighting.

new_doc

    my $doc = $invindexer->new_doc;

Spawn an empty KinoSearch1::Document::Doc object, primed to accept values for the fields spec'd by spec_field.

add_doc

    $invindexer->add_doc($doc);

Add a document to the invindex.

add_invindexes

    my $invindexer = KinoSearch1::InvIndexer->new( 
        invindex => $invindex,
        analyzer => $analyzer,
    );
    $invindexer->add_invindexes( $another_invindex, $yet_another_invindex );
    $invindexer->finish;

Absorb existing invindexes into this one. May only be called once per InvIndexer. add_invindexes() and add_doc() cannot be called on the same InvIndexer.

delete_docs_by_term

    my $term = KinoSearch1::Index::Term->new( 'id', $unique_id );
    $invindexer->delete_docs_by_term($term);

Mark any document which contains the supplied term as deleted, so that it will be excluded from search results. For more info, see Deletions in KinoSearch1::Docs::FileFormat.

finish

    $invindexer->finish( 
        optimize => 1, # default: 0
    );

Finish the invindex. Invalidates the InvIndexer. Takes one hash-style parameter.

  • optimize - If optimize is set to 1, the invindex will be collapsed to its most compact form, which will yield the fastest queries.

COPYRIGHT

Copyright 2005-2010 Marvin Humphrey

LICENSE, DISCLAIMER, BUGS, etc.

See KinoSearch1 version 1.01.




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