Re: Debugging features needed

From: Boboc Cristi <bobocc(at)yahoo(dot)com>
To: Vijaykumar Jain <vijaykumarjain(dot)github(at)gmail(dot)com>
Cc: pgsql-general <pgsql-general(at)lists(dot)postgresql(dot)org>, "pgsql-general-owner(at)lists(dot)postgresql(dot)org" <pgsql-general-owner(at)lists(dot)postgresql(dot)org>
Subject: Re: Debugging features needed
Date: 2021-11-05 11:49:28
Message-ID: 1612433123.812776.1636112968963@mail.yahoo.com
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    Thank you, Sir!
It is, indeed, a good idea!
Best regards, Cristi Boboc

On Friday, November 5, 2021, 01:41:52 PM GMT+2, Vijaykumar Jain <vijaykumarjain(dot)github(at)gmail(dot)com> wrote:

On Fri, Nov 5, 2021, 4:58 PM Boboc Cristi <bobocc(at)yahoo(dot)com> wrote:

Hello!
    I need a feature that would me allow to debug "live" the work of an application together with a PostgreSQL database.

I think that if I would be able to define a session variable that is visible in pg_stat_activity (or in other system view, table or function) I would be more than happy.
Well, I have described what I see as a partial solution to my problem, the problem being: how to track a specific set of actions at database level of a given application user in the context of session pooling (so the user activity can jump from one session to another of the same pool).
If I would be able to set a "value" to a custom variable, then the app would simply need to set the value at each session usage, but I definitely understand that other mechanisms might help solving the problem (but I do not know any of these).

I had been trying something similar to play with tracing. I was wondering if the traceid or requestid could make its way into the query logs to be able to debug.The only thing I could find was play around with param application_name  that could be set for each session with the traceid of my downstream and enable logging to log application name via log_line_prefix.
I'll be interested to know as well if there are any other parameters.
https://www.enterprisedb.com/blog/getting-most-out-applicationname

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