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=encoding utf8

=head1 NAME

Lucy::Search::ORQuery - Union multiple result sets.

=head1 SYNOPSIS

    my $foo_or_bar_query = Lucy::Search::ORQuery->new(
        children => [ $foo_query, $bar_query ],
    );
    my $hits = $searcher->hits( query => $foo_or_bar_query );
    ...

=head1 DESCRIPTION

ORQuery is a composite L<Query|Lucy::Search::Query> which matches
when any of its children match, so its result set is the union of their
result sets.  Matching documents recieve a summed score from all matching
child Queries.

=head1 CONSTRUCTORS

=head2 new

    my $foo_or_bar_query = Lucy::Search::ORQuery->new(
        children => [ $foo_query, $bar_query ],
    );

Create a new ORQuery.

=over

=item *

B<children> - An array of child Queries.

=back

=head1 METHODS

=head2 make_compiler

    my $compiler = $or_query->make_compiler(
        searcher    => $searcher,     # required
        boost       => $boost,        # required
        subordinate => $subordinate,  # default: false
    );

Abstract factory method returning a Compiler derived from this Query.

=over

=item *

B<searcher> - A Searcher.

=item *

B<boost> - A scoring multiplier.

=item *

B<subordinate> - Indicates whether the Query is a subquery (as
opposed to a top-level query).  If false, the implementation must
invoke L<normalize()|Lucy::Search::Compiler/normalize> on the newly minted Compiler object before returning
it.

=back

=head1 INHERITANCE

Lucy::Search::ORQuery isa L<Lucy::Search::PolyQuery> isa L<Lucy::Search::Query> isa Clownfish::Obj.

=cut