--- Database.php        2012-08-24 18:49:53.431527570 -0500
+++ _backup_Database.php        2012-08-24 18:50:25.721527516 -0500
@@ -1378,6 +1378,17 @@
                }
 
                $options = (array)$options;
+
+               if ($this->getType() == 'postgres' and
+                       (in_array('LOCK IN SHARE MODE', $options, true) or
+                       isset($options['LOCK IN SHARE MODE'])))
+               {
+                       // just fail...
+                       //throw new Exception('Cannot use LOCK IN SHARE MODE with Postgresql');
+                       // or maybe just remove the option
+                       unset($options['LOCK IN SHARE MODE']);
+                       unset($options[array_search('LOCK IN SHARE MODE', $options, true)]);
+               }
 
                if ( is_array( $table ) ) {
                        $useIndex = ( isset( $options['USE INDEX'] ) && is_array( $options['USE INDEX'] ) )