Templates calling extended attribute

Hello,

does anybody face the same problem? Trying to call the extended attribute of the column (RedShift database) which is called encoding. PD does not know that ...

Do you know how to call that from the template?

create table %Owner.Name%.%Name% (\n
.foreach_item(Columns)
\t%Name% %DataType%
   .if %Mandatory% 
 NOT NULL
   .endif
   %encoding%
.next(,\n)