AW: xargs psql

Hello , it works for me.
 I remember some difficulties with quote escaping. That's while  I'm using $$ quoting for the sql aguments.

here is how ma commands look like:

psqlexec="psql -h$pghost -p$pgport -U$pguser -d${pgdb} -1 -P  format=u -tqX";

$psqlexec -c "SELECT relname FROM pg_class WHERE ..." \
| xargs -n 1 -P 8 -I{} bash -c "$psqlexec -c 'select * from foo(\$\${}\$\$)' > ouputdir/{}.out"

HTH,

Marc Mamin
________________________________________
Von: Shaozhong SHI <shishaozhong@gmail.com>
Gesendet: Donnerstag, 28. April 2022 13:32:42
An: pgsql-sql
Betreff: xargs psql

Running lots of postgres commands in parallel | Mark's blog
(markandruth.co.uk)<https://markandruth.co.uk/2016/05/26/running-lots-of-postgres-commands-in-parallel>

Has anyone made success with this?

How to put xargs command line correctly?

Regards,

David