KinoSearch1::Search::Query

set_boost get_boost

    $term_query_a->set_boost(2);
    $boolean_query->add_clause( query => $term_query_a, occur => 'SHOULD' );
    $boolean_query->add_clause( query => $term_query_b, occur => 'SHOULD' );

The boost of any Query is 1.0 by default. Setting boost to a number greater than one increases a Query's relative contribution to a score, and setting boost to a lower number decreases the contribution.