recuperar términos de taxonomía sólo para post de una determinada categoría

[AlZuwaga]

Bien, no sé si esto estará del todo OK, pero está funcionando... así que por el memento me sirve

Código:

function my_custom_get_terms( $my_tax, $my_category ){
	global $wpdb;
	global $pagename;
	
	$query = "SELECT Count(wp_posts.ID) AS my_term_count, wp_term_taxonomy.term_taxonomy_id, wp_term_taxonomy.taxonomy, wp_terms.name, wp_terms.term_id, wp_terms.slug AS term_slug, wp_terms.term_group, wp_terms_1.slug
	FROM (((((wp_term_relationships INNER JOIN wp_term_taxonomy ON wp_term_relationships.term_taxonomy_id = wp_term_taxonomy.term_taxonomy_id) INNER JOIN wp_terms ON wp_term_taxonomy.term_id = wp_terms.term_id) INNER JOIN wp_posts ON wp_term_relationships.object_id = wp_posts.ID) INNER JOIN wp_term_relationships AS wp_term_relationships_1 ON wp_posts.ID = wp_term_relationships_1.object_id) INNER JOIN wp_term_taxonomy AS wp_term_taxonomy_1 ON wp_term_relationships_1.term_taxonomy_id = wp_term_taxonomy_1.term_taxonomy_id) INNER JOIN wp_terms AS wp_terms_1 ON wp_term_taxonomy_1.term_id = wp_terms_1.term_id
	GROUP BY wp_term_taxonomy.term_taxonomy_id, wp_term_taxonomy.taxonomy, wp_terms.name, wp_terms.term_id, wp_terms.slug, wp_terms.term_group, wp_terms_1.slug
	HAVING (((wp_term_taxonomy.taxonomy)='$my_tax') AND ((wp_terms_1.slug) = '$my_category'))
	ORDER BY Count(wp_posts.ID) DESC";

	$datos = $wpdb->get_results($query, OBJECT);
	echo "<ul>";
	$total = 0;
	foreach ( $datos as $dato ) {
		echo '<li><a href="' . get_bloginfo('url') . '/' . get_parent_page_slug() . '/' . $pagename . '/?tipo=' . $dato->term_slug . '">' . $dato->name . ' (' . $dato->my_term_count . ')</a></li>';
		$total += $dato->my_term_count;
	}
	echo '<li><a href="' . get_bloginfo('url') . '/' . get_parent_page_slug() . '/' . $pagename . '/">Todos (' . $total . ')</a></li>';
	echo "</ul>";
}



my_custom_get_terms( 'tipo', get_parent_page_slug() );

Edito: Sé acerca del uso de $wpdb->tabla para sustituir el prefijo wp_tabla, pero al implementarlo me dio problemas y que quedó así al menos momentáneamente.