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Thread: How to do things like \timing on in a do loop?

How to do things like \timing on in a do loop?

From
Shaozhong SHI
Date:
DO
$do$
declare

j int=1;

BEGIN 

for j in 1..100 loop

\timing on

select * from a_table;

end loop;

end
$$;


It appears that \timing on is not allowed in a do statement.

Any alternative to do that in a do statement?

Regards,

David

Re: How to do things like \timing on in a do loop?

From
Erik Brandsberg
Date:
You can't, as \timing is not a postgres command.  It is a psql command, so is not interpreted by the server itself.

On Sat, Oct 15, 2022, 3:33 PM Shaozhong SHI <shishaozhong@gmail.com> wrote:
DO
$do$
declare

j int=1;

BEGIN 

for j in 1..100 loop

\timing on

select * from a_table;

end loop;

end
$$;


It appears that \timing on is not allowed in a do statement.

Any alternative to do that in a do statement?

Regards,

David

Re: How to do things like \timing on in a do loop?

From
hubert depesz lubaczewski
Date:
On Sat, Oct 15, 2022 at 08:32:59PM +0100, Shaozhong SHI wrote:
> DO
> $do$
> declare
> 
> j int=1;
> 
> BEGIN
> 
> for j in 1..100 loop
> 
> \timing on
> 
> select * from a_table;
> 
> end loop;
> 
> end
> $$;
> 
> 
> It appears that \timing on is not allowed in a do statement.
> 
> Any alternative to do that in a do statement?

Perhaps explain what you want to do, because from this snippet it is
(for me) definitely not clear.

You're mixing postgresql code (do blocks) and psql commands (\timing).
you're trying to get timing off select, but you're not telling the code
what to do with results of the select.

So, what is the end goal in here? And how will you run it? Via psql?
Some other db access?

depesz