Re: Questions and experiences writing a Foreign Data Wrapper - Mailing list pgsql-hackers

From Albe Laurenz
Subject Re: Questions and experiences writing a Foreign Data Wrapper
Date
Msg-id D960CB61B694CF459DCFB4B0128514C206B20EF1@exadv11.host.magwien.gv.at
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In response to Re: Questions and experiences writing a Foreign Data Wrapper  (Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>)
Responses Re: Questions and experiences writing a Foreign Data Wrapper
List pgsql-hackers
Heikki Linnakangas wrote:
>> I guess I misunderstood the concept of user mapping.

>> I guess it is time to read my SQL Standard, but some clarification
>> in the documentation sure wouldn't hurt.
>
> Agreed, there doesn't seem to be any documentation on user mappings,
> aside from the reference page for the CREATE USER MAPPING command. The
> "5.10 Foreign Data" section should explain what user mappings are.
Want
> to give it a shot?

Sure, see the attached 'fdw-usermapping-doc.patch'.

I also include a 'fdw-scan-doc.patch' that tells FDW implementors *not*
to start the scan in BeginForeignScan.

Yours,
Laurenz Albe

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