Re: flinfo NULL in DirectFunctionCall callee?

Tom Lane <tgl@sss.pgh.pa.us>

From: Tom Lane <tgl@sss.pgh.pa.us>
To: Paul A Jungwirth <pj@illuminatedcomputing.com>
Cc: pgsql-general@lists.postgresql.org
Date: 2019-08-26T15:11:58Z
Lists: pgsql-general
Paul A Jungwirth <pj@illuminatedcomputing.com> writes:
> Is it expected for flinfo to be null when using DirectFunctionCall*?

Yes, per the comment on those functions:

 * These are for invocation of a specifically named function with a
 * directly-computed parameter list.  Note that neither arguments nor result
 * are allowed to be NULL.  Also, the function cannot be one that needs to
 * look at FmgrInfo, since there won't be any.

> Is there something else I should use instead? It looks like
> FunctionCall2 would let me pass my own flinfo, but I'm not sure how to
> set that up first.

Use fmgr_info() or a sibling to fill in the FmgrInfo.

			regards, tom lane



Commits

  1. Make comment in fmgr.h match the one in fmgr.c.