You could do two things:
A) replace the search with a SQL query that only searches the postmeta table (faster as there’s no JOIN
involved – you can get the post via it’s ID later on, when displaying the results).
B) Split the string right after WHERE 1=1
and drop the later part. You can use a simple return str_replace( $query_part_below, '', $search );
.
AND (
(whirl_2_posts.post_title LIKE '%__SEARCH_STRING__%')
OR (whirl_2_posts.post_content LIKE '%__SEARCH_STRING__%')
)
Make sure that you properly $wpdb->prepare()
before pushing it back in.