| From: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
|---|---|
| To: | Albe Laurenz <laurenz(dot)albe(at)wien(dot)gv(dot)at> |
| Cc: | "Cedric Berger *EXTERN*" <cedric(at)precidata(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Getting my Database name in a C Extension |
| Date: | 2014-10-03 08:23:37 |
| Message-ID: | CAB7nPqRgmeBhwi3cGcO5UXuFPXax-xThG0KWd3e9sQBXXSk-5w@mail.gmail.com |
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| Lists: | pgsql-general |
On Fri, Oct 3, 2014 at 4:57 PM, Albe Laurenz <laurenz(dot)albe(at)wien(dot)gv(dot)at>
wrote:
> Cedric Berger wrote:
>>>> 1) What is the easiest way to get that directly in C?
>>>
>>> The usual locution is "get_database_name(MyDatabaseId)".
>>
>> Ok, but then how do I find "MyDatabaseId" in, say,
>> a BeginForeignScan() or GetForeignRelSize() FDW callback?
>
> It is a global, all you should have to do is
> #include "miscadmin.h"
When looking for a global variable, a command like that is generally useful:
$ git grep MyDatabaseId -- *.h
src/include/access/xact.h: Oid dbId;
/* MyDatabaseId */
src/include/miscadmin.h:extern PGDLLIMPORT Oid MyDatabaseId;
Regards,
--
Michael
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