[GENERAL] how can I find out the numeric directory name of each database in PostgreSQL 8.3

[Justin Yao]

Hi,

In PostgreSQL 7.x, I can use SQL:
select datname, oid from pg_database
to find out the numeric directory name under $PGDATA/base for each 
database. But it doesn't work for PostgreSQL 8.3.
Is there any way I can do it for 8.3?
Thanks,
--
Justin Yao

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