Re: pgsql: Remove useless default clause in switch

On 2018/04/24 10:20, Michael Paquier wrote:
> On Tue, Apr 24, 2018 at 12:27:27PM +1200, David Rowley wrote:
>> I always thought that when all options were covered that we generally
>> kept a default just in case someone added another enum and forgot to
>> update the code.
>>
>> I know generally those are with elog ERRORs but both would be designed
>> to alert a programmer, just at different times.
>
> The advantage with what Alvaro has done is that you get warning at
> compilation time, so it is much more helpful for developers when
> adding an option because they need to think about code paths where the
> warning comes from.

+1

>> There are other examples in that file with the switch
>> (part_scheme->strategy), these are not using enums. I'd have to assume
>> that these must be different because of that.
>
> Those apply to PARTITION_STRATEGY_LIST and such, which are not defined
> based on an enumeration but using their catalog interpretation, so this
> assumption cannot apply. The same applies for BTLessEqualStrategyNumber
> & friends which have their own definition.
>
> You are right for what's in perform_pruning_combine_step though, so the
> attached could also be applied.

Thanks for spotting that one.

Regards,
Amit