RE: [PATCH] Tiny optmization.

Hi,
pstate is touched here:
a) BeginCopy line 1489:
ProcessCopyOptions(pstate, cstate, is_from, options);
b) ProcessCopyOptions line 1137:

if (format_specified)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));

best regards.
Ranier Vilela

________________________________________
De: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Enviado: sexta-feira, 22 de novembro de 2019 22:17
Para: Ranier Vilela
Cc: pgsql-hackers(at)postgresql(dot)org
Assunto: Re: [PATCH] Tiny optmization.

Ranier Vilela <ranier_gyn(at)hotmail(dot)com> writes:
> Redudant because he it's been dereferenced here:
> line 3410:
> cstate = BeginCopy(pstate, true, rel, NULL, InvalidOid, attnamelist, options);

Not necessarily ... the rel!=NULL code path there doesn't touch pstate,
and that seems to be what contrib/file_fdw is relying on.

Arguably, the rel==NULL code path in BeginCopy should be prepared to
support pstate being null, too. But what you proposed here is certainly
not OK.

regards, tom lane