I want to do something like this
$query_args = array( 'post_type' => array( 'cpt_1', 'cpt_2' ), 'post__in' => array( 1, 3, 5, 7 ) );
where I can specify which post type the post__in applies to.
For example, I want to get all the posts from cpt_1, but I only want the cpt_2 ones that are specified in post__in. Is there an SQL hook (like posts_where) that can help me accomplish this? If not I guess I'll have to do two queries?