RE: Parallel Apply

Dear Amit,

> +1 for the Option-2 as it simplifies the handling in patch as compared
> to others.

OK, let's proceed with the option.

> Apart from that,
> +/*
> + * Worker internal message types
> + *
> + * This type of messages would be generated by leader apply worker and sent to
> + * the parallel apply worker.
> + */
> +typedef enum WorkerInternalMsgType
> +{
> + WORKER_INTERNAL_MSG_DEPENDENCY = 'd',
> + WORKER_INTERNAL_MSG_RELATION = 'i',
> +} WorkerInternalMsgType;
> +
> 
> I think here INTERNAL makes the purpose unclear whereas we know that
> these will always be used to communicate wth parallel apply workers.
> So, how about one of following options:
> 
> typedef enum PAWorkerMsgType
>   {
>       PA_MSG_XACT_DEPENDENCY = 'd',
>       PA_MSG_RELMAP          = 'i',
>   } PAWorkerMsgType;

Since either of them were OK for me, the shorter one is now used.
The latest patch is usable in [1].

[1]:
https://www.postgresql.org/message-id/OS9PR01MB121490458FFF58A543ABC32F4F5362%40OS9PR01MB12149.jpnprd01.prod.outlook.com

Best regards,
Hayato Kuroda
FUJITSU LIMITED