visit_ChangeColumnDefinition

# File activerecord/lib/active_record/connection_adapters/mysql/schema_creation.rb, line 23
        def visit_ChangeColumnDefinition(o)
          change_column_sql = "CHANGE #{quote_column_name(o.name)} #{accept(o.column)}"
          add_column_position!(change_column_sql, column_options(o.column))
        end