On 11/8/20 11:09 AM, Susan Hurst wrote:
The first pass thru https://www.postgresql.org/docs/12/fdwhandler.html
does not tell me what I think I need to know, but I will digest this
more thoroughly. Maybe I need to understand more of the lingo re:
foreign data wrappers. I do understand that all fdw names must be unique
within a database so if I want to connect to more than one foreign db, I
need a different name for each connection. I cannot name each fdw
postgres_fdw. I would like to name the fdws something like:
dbname_to_foreigndbname.
For example, here are 2 possible fdws:
create foreign data wrapper stp_to_geo;
create foreign data wrapper stp_to_metrics;
Aren't you looking for?:
https://www.postgresql.org/docs/12/sql-createserver.html
"
A foreign server typically encapsulates connection information that a
foreign-data wrapper uses to access an external data resource.
Additional user-specific connection information may be specified by
means of user mappings.
The server name must be unique within the database.
"
That syntax creates the fdw and I can create user mappings but I cannot
import any foreign schemas into my database. The error message says that
there is no handler for the fdw. That's where I'm stuck.
BTW, I did try using postgres_fdw as a handler...
create foreign data wrapper stp_to_geo handler postgres_fdw;
...but then I got these errors:
ERROR: function postgres_fdw() does not exist
ERROR: foreign-data wrapper "stp_to_geo" does not exist
Looks like I need to study a bit more.
Sue
---
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Susan E Hurst
Principal Consultant
Brookhurst Data LLC
Email: susan.hurst@xxxxxxxxxxxxxxxxxx
Mobile: 314-486-3261
On 2020-11-07 14:51, Adrian Klaver wrote:
On 11/7/20 12:44 PM, Susan Hurst wrote:
Can anyone recommend a good online resource for learning how to set
up a foreign data wrapper using a custom fdw name? It seems the
trick is to use a handler to make it work but so far the search
results have been elusive for creating a fdw with a successful outcome.
Have you gone through this?:
https://www.postgresql.org/docs/12/fdwhandler.html
Also can we get a definition of 'custom fdw name'?
I'm using 'PostgreSQL 11.8 on amd64-portbld-freebsd12.1, compiled by
FreeBSD clang version 8.0.1 (tags/RELEASE_801/final 366581) (based on
LLVM 8.0.1), 64-bit'
Thanks for your help!
Sue
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
