Enviado: segunda-feira, 15 de junho de 2020 22:24 Para: Edson Richter <edsonrichter@hotmail.com> Cc: pgsql-general <pgsql-general@postgresql.org> Assunto: Re: How to double-quote a double quoted identifier?
Edson Richter <edsonrichter@hotmail.com> writes: > How do I remote execute que following command: > CREATE EXTENSION "uuid-ossp" > SCHEMA public > VERSION "1.1";
Yeah, nesting quoting levels in shell is kind of a bear.
> I know this is a kind of "bash-psql" issue, but I would appreciate if anyone could share experience with this.
Since you're using bash, you can get bash to do the work for you, via multiple iterations of the ${variable@Q} construct.
$ SQLCMD='CREATE EXTENSION "uuid-ossp" SCHEMA pg_catalog;' $ echo $SQLCMD CREATE EXTENSION "uuid-ossp" SCHEMA pg_catalog; $ echo ${SQLCMD@Q} 'CREATE EXTENSION "uuid-ossp" SCHEMA pg_catalog;' -- not too exciting so far, but wrap it into another layer of quoting: $ SHCMD="psql -h 127.0.0.1 -d test_db -p 5432 -c ${SQLCMD@Q}" $ echo $SHCMD psql -h 127.0.0.1 -d test_db -p 5432 -c 'CREATE EXTENSION "uuid-ossp" SCHEMA pg_catalog;' $ echo ${SHCMD@Q} 'psql -h 127.0.0.1 -d test_db -p 5432 -c '\''CREATE EXTENSION "uuid-ossp" SCHEMA pg_catalog;'\''' -- and now your answer is: $ echo ssh -l postgres -2 -C -p 2022 192.168.0.70 ${SHCMD@Q} ssh -l postgres -2 -C -p 2022 192.168.0.70 'psql -h 127.0.0.1 -d test_db -p 5432 -c '\''CREATE EXTENSION "uuid-ossp" SCHEMA pg_catalog;'\'''
You could, of course, just use the end result of that -- but it's probably better to have a shell script recalculate it on the fly given the desired SQL command as input.
