Обсуждение: Simple CustomScan example

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Simple CustomScan example

От
Chris Cleveland
Дата:
I'm trying to write a custom scan. It's pretty confusing. I've read the documentation at
https://www.postgresql.org/docs/current/custom-scan.html, and I've scanned the
code in Citus Columnar and in Timescale, both of which are quite complex.

Is anyone aware of code with a simple example of a custom scan? Or maybe a tutorial?

--
Chris Cleveland
312-339-2677 mobile

Re: Simple CustomScan example

От
"Drouvot, Bertrand"
Дата:
Hi,

On 9/6/23 9:32 PM, Chris Cleveland wrote:
> I'm trying to write a custom scan. It's pretty confusing. I've read the documentation at
> https://www.postgresql.org/docs/current/custom-scan.html <https://www.postgresql.org/docs/current/custom-scan.html>,
andI've scanned the
 
> code in Citus Columnar and in Timescale, both of which are quite complex.
> 
> Is anyone aware of code with a simple example of a custom scan? 

You may find the one in this repo: https://github.com/bdrouvot/pg_directpaths simple enough.

Regards,

-- 
Bertrand Drouvot
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com

Re: Simple CustomScan example

От
Michael Paquier
Дата:
On Thu, Sep 07, 2023 at 06:29:27PM +0200, Drouvot, Bertrand wrote:
> You may find the one in this repo:
> https://github.com/bdrouvot/pg_directpaths simple enough.

I'll repeat a remark I have made exactly yesterday on a different
thread: having a test module for custom scans in src/test/modules/ to
test these APIs and have a usable template would be welcome :D
--
Michael
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