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Re: Getting my Database name in a C Extension

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On 03/10/14 10:23, Michael Paquier wrote:

On Fri, Oct 3, 2014 at 4:57 PM, Albe Laurenz <laurenz.albe@xxxxxxxxxx
<mailto:laurenz.albe@xxxxxxxxxx>> 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;

Thanks a lot!

I didn't think 'MyDatabaseId' was a real variable name...

Cedric



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