public static function diff_clusters_table($ofs, $old_schema, $old_table, $new_schema, $new_table)
 {
     if ($old_table == null) {
         $old_cluster = null;
     } else {
         $old_cluster = isset($old_table['clusterIndex']) ? $old_table['clusterIndex'] : null;
     }
     $new_cluster = isset($new_table['clusterIndex']) ? $new_table['clusterIndex'] : null;
     if ($old_cluster == null && $new_cluster != null || $old_cluster != null && $new_cluster != null && strcmp($new_cluster, $old_cluster) != 0) {
         $ofs->write("ALTER TABLE " . pgsql8::get_quoted_schema_name($new_schema['name']) . '.' . pgsql8::get_quoted_table_name($new_table['name']) . " CLUSTER ON " . pgsql8::get_quoted_column_name($new_cluster) . ";\n");
     } else {
         if ($old_cluster != null && $new_cluster == null && pgsql8_table::contains_index($new_schema, $new_table, $old_cluster)) {
             $ofs->write("ALTER TABLE " . pgsql8::get_quoted_schema_name($new_schema['name']) . '.' . pgsql8::get_quoted_table_name($table['name']) . " SET WITHOUT CLUSTER;" . "\n");
         }
     }
 }
 /**
  * Returns list of indexes that should be added.
  *
  * @param old_table original table
  * @param new_table new table
  *
  * @return list of indexes that should be added
  */
 public static function get_new_indexes($old_schema, $old_table, $new_schema, $new_table)
 {
     $list = array();
     if ($new_table != null) {
         if ($old_table == null) {
             foreach (format_index::get_table_indexes($new_schema, $new_table) as $index) {
                 $list[] = $index;
             }
         } else {
             foreach (format_index::get_table_indexes($new_schema, $new_table) as $index) {
                 $old_index = dbx::get_table_index($old_schema, $old_table, $index['name']);
                 if (!pgsql8_table::contains_index($old_schema, $old_table, $index['name'])) {
                     $list[] = $index;
                 } else {
                     if (!pgsql8_index::equals($old_index, $index)) {
                         $list[] = $index;
                     }
                 }
             }
         }
     }
     return $list;
 }