Re: redundant check of msg in does_not_exist_skipping - Mailing list pgsql-hackers

On Thu, 17 Nov 2022 at 20:12, Ted Yu <yuzhihong@gmail.com> wrote:
> Hi,
> I was looking at commit aca992040951c7665f1701cd25d48808eda7a809
>
> I think the check of msg after the switch statement is not necessary. The
> variable msg is used afterward.
> If there is (potential) missing case in switch statement, the compiler
> would warn.
>
> How about removing the check ?
>

I think we cannot remove the check, for example, if objtype is OBJECT_OPFAMILY,
and schema_does_not_exist_skipping() returns true, the so the msg keeps NULL,
if we remove this check, a sigfault might be occurd in ereport().

        case OBJECT_OPFAMILY:
            {
                List       *opfname = list_copy_tail(castNode(List, object), 1);

                if (!schema_does_not_exist_skipping(opfname, &msg, &name))
                {
                    msg = gettext_noop("operator family \"%s\" does not exist for access method \"%s\", skipping");
                    name = NameListToString(opfname);
                    args = strVal(linitial(castNode(List, object)));
                }
            }
            break;

-- 
Regrads,
Japin Li.
ChengDu WenWu Information Technology Co.,Ltd.