# File lib/dm-migrations/sql/table_modifier.rb, line 22
    def drop_column(name)
      # raise NotImplemented for SQLite3. Can't ALTER TABLE, need to copy table.
      # We'd have to inspect it, and we can't, since we aren't executing any queries yet.
      # TODO instead of building the SQL queries when executing the block, create AddColumn,
      # AlterColumn and DropColumn objects that get #to_sql'd
      if name.is_a?(Array)
        name.each{ |n| drop_column(n) }
      else
        @statements << "ALTER TABLE #{quoted_table_name} DROP COLUMN #{quote_column_name(name)}"
      end
    end