Re: [GENERAL] Request - repeat value of \pset title during \watch interations

Adding -hackers for consideration in the Commitfest.

Thanks!

David J.

>>>Original request by me

http://www.postgresql.org/message-id/CAKFQuwZqjz-je3Z=8JDOdYm3JM-N2UL4cuqy5VH8N75E5v1VVQ@mail.gmail.com

When executing a query using \watch in psql the first execution of the
query includes "Title is [...]" when \pset title is in use. Subsequent
executions do not. Once that first display goes off-screen the information
in the title is no longer readily accessible. If using \watch for a
long-running monitoring query it can be helpful to incorporate some context
information into the title.

---------- Forwarded message ----------
From: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
Date: Thu, Jan 28, 2016 at 6:01 AM
Subject: Re: [GENERAL] Request - repeat value of \pset title during \watch
interations
To: "David G. Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "pgsql-general(at)postgresql(dot)org" <
pgsql-general(at)postgresql(dot)org>

On Thu, Jan 28, 2016 at 1:54 PM, David G. Johnston
<david(dot)g(dot)johnston(at)gmail(dot)com> wrote:
> On Wed, Jan 27, 2016 at 9:13 PM, Michael Paquier <
michael(dot)paquier(at)gmail(dot)com>
> wrote:
>>
>> On Thu, Jan 28, 2016 at 9:34 AM, David G. Johnston
>> <david(dot)g(dot)johnston(at)gmail(dot)com> wrote:
>> > So how about:
>> >
>> > + snprintf(title, strlen(myopt.title) + 50,
>> > + _("Watch every %lds\t%s\t%s"),
>> > + sleep, head_title, asctime(localtime(&timer)));
>>
>> I would just keep the timestamp and the title separated so what do you
>> think about that instead?
>> Watch every Xs $timestamp
>> $head_title
>
>
> That works. I like having the title immediately above the table.
>
> The other option that came to mind would be to place the time information
> after the table display while leaving the title before it. On an output
> that requires more vertical space than is available in the terminal one
> would no longer have to scroll up to confirm last execution time. If
doing
> this I'd probably get rid of any logic that attempts to center the time
> information on the table and simply leave it left-aligned.

​And the example:
​
OK, attached is an updated patch. How does that look?

Watch every 5s Fri Jan 29 13:06:31 2016

This is a medium length title
repeat

------------------------------------------------------------
------------------------------------------
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
(1 row)
​