RE: ReplicationSlotRelease() crashes when the instance is in the single user mode

Dear Michael,

> I did not check how these call behave individually, just a few
> comments while putting my eyes on the patch.
>
> + if (!IsUnderPostmaster)
> + elog(ERROR,
> + "slot operation is prohibited in the single user mode");
>
> elog() should not be used for failures that can be user-facing as this
> would not provide any translation.

I intentionally used elog() because I thought single user mode is not user-facing.
But it is OK for me to use ereport() instead.

> I'd suggest rewording the error message to provide some more context,
> as well, say:
> "cannot use %s in single-user mode", "function_name"

Fixed. PSA new version

Best regards,
Hayato Kuroda
FUJITSU LIMITED