Re: allow online change primary_conninfo

On 2020-Mar-27, Sergei Kornilov wrote:

> Hello
> 
> > I realized that the reason the tests broke after Sergei's patch is that
> > recovery/t/001_stream_rep.pl's get_slot_xmins() is broken for temp
> > walreceiver slots, since it's using the non-temp name it tries to give
> > to the slot, rather than the temp name under which it is actually
> > created. The workaround proposed by 0002 is to edit standby_1's config
> > to set walreceiver's slot to be non-temp.
> 
> This is bug in behavior, not in tests.
> We need walrcv->is_temp_slot = false; somewhere in RequestXLogStreaming to works correctly.
> 
> HEAD is not affected since primary_slot_name cannot be changed online.

I pushed the wal_receiver_create_temp_slot bugfix, because I realized
after looking for long enough at WalReceiverMain() that the code was
beyond saving.  I'll be pushing the rest of this later today.

Thanks,

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services