[Plugin: Google Custom Search Plugin] patch to disable WP search queries

we found that with this plugin enabled in some cases the search query was still also being performed on the DB even though it was returning google results (particularly when not using the iframe option)

here is a patch that will change the global search query to disable it when you activate the plugin so that it only uses Google CSE for searching and search results:

diff --git a/wp-content/plugins/google-custom-search-for-wordpress/GoogleCSE.php b/wp-content/plugins/google-custom-search-for-wordpress/GoogleCSE.php
index 57b7d66..328f950 100755
--- a/wp-content/plugins/google-custom-search-for-wordpress/GoogleCSE.php
+++ b/wp-content/plugins/google-custom-search-for-wordpress/GoogleCSE.php
@@ -26,6 +26,7 @@ class GoogleCSE
 		add_filter('get_search_form', array('GoogleCSE', 'get_form'));
 		add_action('template_redirect', array('GoogleCSE', 'template_redirect'), 1);
 		add_action('admin_menu', array('GoogleCSE', 'admin_config_page'));
+                add_filter('posts_request', array('GoogleCSE', 'changeRequest'));

 		// setup user options
 		self::$search_url = get_option('home') . '/search/';
@@ -170,7 +171,15 @@ class GoogleCSE

 		return $form;
 	}
-
+
+        public static function changeRequest( $request )
+        {
+            global $wpdb;
+            if ( is_search() ) {
+                $request = "SELECT ID FROM {$wpdb->posts} WHERE 1=0 limit 1";
+            }
+            return $request;
+        }
 }

 GoogleCSE::run();

https://www.ads-software.com/extend/plugins/google-custom-search-for-wordpress/