Index: includes/database.pgsql.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/database.pgsql.inc,v
retrieving revision 1.13
diff -u -Ff -r1.13 database.pgsql.inc
--- includes/database.pgsql.inc	25 Aug 2005 21:14:16 -0000	1.13
+++ includes/database.pgsql.inc	27 Aug 2005 16:42:23 -0000
@@ -32,6 +32,13 @@   // pg_last_error() does not return a u
   $track_errors_previous = ini_get('track_errors');
   ini_set('track_errors', 1);
 
+  if (!function_exists('pg_connect')) {
+    drupal_maintenance_theme();
+    drupal_set_title('PostgreSQL functions not enabled');
+    print theme('maintenance_page', '<p>You do not have the php_pgsql module enabled.</p>
+<p>Please see <a href="http://www.php.net/manual/en/ref.pgsql.php#pgsql.installation">the php manual about PostgreSQL installation</a>.</p>');
+    exit;
+  }
   $connection = @pg_connect($conn_string);
   if (!$connection) {
     drupal_maintenance_theme();