code: public function renameColumn($table, $name, $newName)
      {
          $time = $this->beginCommand("rename column $name in table $table to $newName");
          $this->db->createCommand()->renameColumn($table, $name, $newName)->execute();
          $this->endCommand($time);
      }
docs: Builds and executes a SQL statement for renaming a column.
  @param string $table the table whose column is to be renamed. The name will be properly quoted by the method.
  @param string $name the old name of the column. The name will be properly quoted by the method.
  @param string $newName the new name of the column. The name will be properly quoted by the method.