Обсуждение: deep debug log for psql

Hello,

We found and use for ESQL/C the debug feature:

ECPGdebug(int on, FILE *stream);

with very good results. Is there something similar for the psql
interpreter to debug the query of complex SQL statements like this
monster here:

   SELECT ha.hnr, count(*)   FROM acq_haushalt ha, acq_booking bo   WHERE       ha.hjahr = 2000 AND ha.brgroup
   WHERE bu.bnr = bo.bnr AND bu.band = bo.band AND bu.exemplar = ( SELECT min(bo2.exemplar) FROM acq_booking b
   WHERE bo2.hnr = bo    .hnr
   AND bo2.bnr = bo.bnr AND bo2.band = bo.band)
   AND bu.statusrech IN (0,1) )
   GROUP BY ha.hnr;

The -L logfilename flag of psql is not sufficient enough. It logs only
the query and the final result.

Thanks

    matthias

--
Matthias Apitz, ✉ guru@unixarea.de, http://www.unixarea.de/ +49-176-38902045
Public GnuPG key: http://www.unixarea.de/key.pub

"Glaube wenig, hinterfrage alles, denke selbst: Wie man Manipulationen durchschaut"
"Believe little, scrutinise all, think by your own: How see through manipulations"
ISBN-10: 386489218X

On 11/20/19 11:12 PM, Matthias Apitz wrote:
> 
> Hello,
> 
> We found and use for ESQL/C the debug feature:
> 
> ECPGdebug(int on, FILE *stream);
> 
> with very good results. Is there something similar for the psql
> interpreter to debug the query of complex SQL statements like this
> monster here:
> 
>     SELECT ha.hnr, count(*)   FROM acq_haushalt ha, acq_booking bo   WHERE       ha.hjahr = 2000 AND ha.brgroup
>     WHERE bu.bnr = bo.bnr AND bu.band = bo.band AND bu.exemplar = ( SELECT min(bo2.exemplar) FROM acq_booking b
>     WHERE bo2.hnr = bo    .hnr
>     AND bo2.bnr = bo.bnr AND bo2.band = bo.band)
>     AND bu.statusrech IN (0,1) )
>     GROUP BY ha.hnr;
> 
> The -L logfilename flag of psql is not sufficient enough. It logs only
> the query and the final result.

client_min_messages?:
https://www.postgresql.org/docs/11/runtime-config-client.html#GUC-CLIENT-MIN-MESSAGES

> 
> Thanks
> 
>     matthias
> 


-- 
Adrian Klaver
adrian.klaver@aklaver.com