Function GetForeignServerSegByRelid

src/backend/foreign/foreign.c:1107–1152

}

Oid
GetForeignServerSegByRelid(Oid relid)
{
	Form_pg_foreign_table tableform;
	ForeignTable *ft;
	HeapTuple	tp;
	Datum		datum;
	bool		isnull;
	Oid 		foreignServerId;

	if (Gp_role != GP_ROLE_EXECUTE)
	{
		tp = SearchSysCache1(FOREIGNTABLEREL, ObjectIdGetDatum(relid));
		if (!HeapTupleIsValid(tp))
			return InvalidOid;
		tableform = (Form_pg_foreign_table) GETSTRUCT(tp);

		ft = (ForeignTable *) palloc(sizeof(ForeignTable));
		ft->relid = relid;
		ft->serverid = tableform->ftserver;

		/* Extract the ftoptions */
		datum = SysCacheGetAttr(FOREIGNTABLEREL,
								tp,
								Anum_pg_foreign_table_ftoptions,
								&isnull);
		if (isnull)
			ft->options = NIL;
		else
			ft->options = untransformRelOptions(datum);

		ReleaseSysCache(tp);
	}
	else
	{
		ft = GetForeignTableOnSegment(relid);

		if (!ft)
			return InvalidOid;
	}

	foreignServerId = ft->serverid;
	pfree(ft);

	return foreignServerId;
}

Datum
gp_foreign_server_id(PG_FUNCTION_ARGS)