On Mon, Dec 14, 2015 at 3:09 PM, Gurjeet Singh <singh.gurjeet@gmail.com> wrote: > On Dec 13, 2015 9:56 PM, "Michael Paquier" <michael.paquier@gmail.com> > wrote: >> If the node has no WAL receiver active, a tuple with NULL values is >> returned instead. > > IMO, in the absence of a WAL receiver the SRF (and the view) should not > return any rows.
The whole point is to not use a SRF in this case: there is always at most one WAL receiver.
The function, maybe. But emitting an all-nulls row from a view seems counter-intuitive, at least when looking at it in context of relational database.