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=head1 NAME
Lucy::Search::ANDQuery - Intersect multiple result sets.
=head1 SYNOPSIS
my $foo_and_bar_query = Lucy::Search::ANDQuery->new(
children => [ $foo_query, $bar_query ],
);
my $hits = $searcher->hits( query => $foo_and_bar_query );
...
=head1 DESCRIPTION
ANDQuery is a composite L<Query|Lucy::Search::Query> which matches
only when all of its children match, so its result set is the intersection
of their result sets. Documents which match receive a summed score.
=head1 CONSTRUCTORS
=head2 new( I<[labeled params]> )
my $foo_and_bar_query = Lucy::Search::ANDQuery->new(
children => [ $foo_query, $bar_query ],
);
=over
=item *
B<children> - An array of child Queries.
=back
=head1 METHODS
=head2 add_child(query)
Add a child Query node.
=head1 INHERITANCE
Lucy::Search::ANDQuery isa L<Lucy::Search::PolyQuery> isa L<Lucy::Search::Query> isa Clownfish::Obj.
=cut