Re: using __func__ to locate and distinguish some error messages

On 2024-Jun-07, jian he wrote:

> so when it actually happens, it cannot quickly locate which function
> where the error has happened.
> maybe under certain conditions (e.g. certain build type or certain
> log_min_messages),
> we can also print out the function name by using gcc __func__.

That information is already in the error data, so you don't need it in
the message text. You can change your log_error_verbosity if you want
it to show up in the log; in psql you can use \errverbose to have it
shown to you after the error is thrown, or you can use
\pset VERBOSITY verbose
to have it printed for every error message. Tools other than psql would
need their own specific ways to display those.

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