Wp фильтрация постов

$my_posts = new WP_Query;

$myposts = $my_posts->query( array(

	'post_type' => 'page',

	'post_parent__in' => array( 1990,1993,1995,1998 ),

	'posts_per_page' => 34,

) );

вот запрос к бд

получаю

<?php 

$array = array

(

    [0] => WP_Post Object

        (

            [ID] => 2128

            [post_author] => 1

            [post_date] => 2015-01-20 18:09:46

            [post_date_gmt] => 2015-01-20 14:09:46

            [post_content] => [gallery ids="2129,2130,2131,2132,2133,2134"  link="file" itemtag="div" icontag="span" captiontag="p"]

            [post_title] => Жилой дом с нежилыми помещениями 

            [post_excerpt] => 

            [post_status] => publish

            [comment_status] => closed

            [ping_status] => open

            [post_password] => 

            [post_name] => zhiloj-dom-s-nezhilymi-pomeshheniyami

            [to_ping] => 

            [pinged] => 

            [post_modified] => 2015-04-14 13:51:07

            [post_modified_gmt] => 2015-04-14 09:51:07

            [post_content_filtered] => 

            [post_parent] => 1998

            [guid] => http://site.ru/?page_id=2128

            [menu_order] => 0

            [post_type] => page

            [post_mime_type] => 

            [comment_count] => 0

            [filter] => raw

        )



    [1] => WP_Post Object

        (

            [ID] => 2119

            [post_author] => 1

            [post_date] => 2015-01-20 18:07:29

            [post_date_gmt] => 2015-01-20 14:07:29

            [post_content] => [gallery ids="2120,2121,2122,2123,2124,2125,2126,2066" link="file" itemtag="div" icontag="span" captiontag="p"]

            [post_title] => Крытый теннисный корт  

            [post_excerpt] => 

            [post_status] => publish

            [comment_status] => closed

            [ping_status] => open

            [post_password] => 

            [post_name] => krytyj-tennisnyj-kort

            [to_ping] => 

            [pinged] => 

            [post_modified] => 2015-04-14 13:51:11

            [post_modified_gmt] => 2015-04-14 09:51:11

            [post_content_filtered] => 

            [post_parent] => 1998

            [guid] => http://site.ru/?page_id=2119

            [menu_order] => 0

            [post_type] => page

            [post_mime_type] => 

            [comment_count] => 0

            [filter] => raw

        )

.....

Теперь получить отсюда только посты с родителем 1998 к примеру...

А то делать несколько запросов вредно же)