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Man Pages


Manual Reference Pages  -  KINOSEARCH1::SEARCH::BOOLEANQUERY (3)

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NAME

KinoSearch1::Search::BooleanQuery - match boolean combinations of Queries

CONTENTS

SYNOPSIS



    my $bool_query = KinoSearch1::Search::BooleanQuery->new;
    $bool_query->add_clause( query => $term_query, occur => MUST );
    my $hits = $searcher->search( query => $bool_query );



DESCRIPTION

BooleanQueries are super-Query objects which match boolean combinations of other Queries.

One way of producing a BooleanQuery is to feed a query string along the lines of this AND NOT that to a QueryParser object:



    my $bool_query = $query_parser->parse( this AND NOT that );



It’s also possible to achieve the same end by manually constructing the query piece by piece:



    my $bool_query = KinoSearch1::Search::BooleanQuery->new;
   
    my $this_query = KinoSearch1::Search::TermQuery->new(
        term => KinoSearch1::Index::Term->new( bodytext, this ),
    );
    $bool_query->add_clause( query => $this_query, occur => MUST );

    my $that_query = KinoSearch1::Search::TermQuery->new(
        term => KinoSearch1::Index::Term->new( bodytext, that ),
    );
    $bool_query->add_clause( query => $that_query, occur => MUST_NOT );



QueryParser objects and hand-rolled Queries can work together:



    my $general_query = $query_parser->parse($q);
    my $news_only     = KinoSearch1::Search::TermQuery->new(
        term => KinoSearch1::Index::Term->new( category, news );
    );
    $bool_query->add_clause( query => $general_query, occur => MUST );
    $bool_query->add_clause( query => $news_only,     occur => MUST );



METHODS

    new



    my $bool_query = KinoSearch1::Search::BooleanQuery->new;



Constructor. Takes no arguments.

    add_clause



    $bool_query->add_clause(
        query => $query, # required
        occur => MUST, # default: SHOULD
    );



Add a clause to the BooleanQuery. Takes hash-style parameters:
o <B>queryB> - an object which belongs to a subclass of KinoSearch1::Search::Query.
o <B>occurB> - must be one of three possible values: ’SHOULD’, ’MUST’, or ’MUST_NOT’.

COPYRIGHT

Copyright 2005-2010 Marvin Humphrey

LICENSE, DISCLAIMER, BUGS, etc.

See KinoSearch1 version 1.01.
Search for    or go to Top of page |  Section 3 |  Main Index


perl v5.20.3 KINOSEARCH1::SEARCH::BOOLEANQUERY (3) 2016-03-17

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