Directly manipulate the actual SQL executed in the main search algorithm of SearchWP

gistfile1.php

<?php
 
function my_searchwp_query_conditions( $sql, $postType, $engine ) {
  // modify $sql to your liking
  return $sql;
}
 
add_filter( 'searchwp_query_conditions', 'my_searchwp_query_conditions', 10, 3 );