$pieces = array( 'fields', 'join', 'where', 'orderby', 'order', 'limits', 'groupby' );
$clauses = apply_filters_ref_array( 'comments_clauses', array( compact( $pieces ), &$this ) );
foreach ( $pieces as $piece )
$pieces = array( 'fields', 'join', 'where', 'orderby', 'order', 'limits', 'groupby' );
$clauses = apply_filters_ref_array( 'comments_clauses', array( compact( $pieces ), &$this ) );
foreach ( $pieces as $piece )