NOT EXIST for PREPARE

Hello hackers.

Do I understand correctly the only way know availability PREPARE it will
appeal to pg_prepared_statements?
I think this is not a good practice. In some cases, we may not be aware of
the PREPARE made (pgpool).
Moreover, it seems popular question in the Internet:
http://stackoverflow.com/questions/1193020/php-postgresql-check-if-a-prepared-statement-already-exists

What do you think about adding NOT EXIST functionality to PREPARE?

Thanks.
--
Yury Zhuravlev
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company