Volkan YAZICI wrote:

On Jan 09 04:18, JiangWei wrote:

AFAIK, it's not possible to point the field's default value using a
special value in the related array member. Because, you cannot declare
any special value in the array: NULL will be treated as NULL and other
char values as is.

We can declare a specialized oid for this.


You mean in the parameter types?

Yes.

If so, is this supported by PostgreSQL?

No. Just an idea. "EXPRESSION_OID" for 'DEFAULT' , ' foo ( id, 2) ', 'm * n + x' ...