| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Ashutosh Bapat <ashutosh(dot)bapat(at)enterprisedb(dot)com> |
| Cc: | Etsuro Fujita <fujita(dot)etsuro(at)lab(dot)ntt(dot)co(dot)jp>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Use %u to print user mapping's umid and userid |
| Date: | 2016-02-09 04:51:30 |
| Message-ID: | 20793.1454993490@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Ashutosh Bapat <ashutosh(dot)bapat(at)enterprisedb(dot)com> writes:
> Sorry to come to this late.
> The userid being printed is from UserMapping. The new API
> GetUserMappingById() allows an FDW to get user mapping by its OID. This API
> is intended to be used by FDWs to fetch the user mapping inferred by the
> core for given join between foreign relations. In such user mapping object
> , userid may be -1 for a public user mapping.
If that is actually how it works, it's broken and I'm going to insist
on a redesign. There is nothing anywhere that says that 0xffffffff
is not a valid OID.
regards, tom lane
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