import sql dump with psql - language creation throws error

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Hi everybody,

I have an automated mechanism to restore a demo database each night with an SQL dump. What
I do inbetween a shell script is the following:

1. all database access is canceled
2. dropdb
3. createdb
4. import SQL dump: psql -o /dev/null $DB < /var/lib/postgresql/scripts/$SQL_DUMP

The last step is the issue. The shell script is run by an cronjob and if one of the steps
is failing, the crondaemon sends an E-Mail. The cluster allready exists (for sure) and the
language plpgsl also. The last point (4.) always creates an error (what is clear),
allthough the dump is imported anyway:

ERROR:  Language »plpgsql« allready exists

psql -o /dev/null $DB < /var/lib/postgresql/scripts/$SQL_DUMP ||
         echo "Der dump konnte nicht eingespielt werden." >&2

And because the ERROR message is the output, the crondaemon sends an email.

Question:

Where can I prevent bulding the language again? My idea was to do that while creating the
dump or while importing the dump. But as far as I understand, that's not possible.

The dump is created on another server using
/usr/bin/pg_dump -Ft -t sys_language garfield > sys_language.tar

Thanks for any advice

Andy

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Andreas Wenk

St.Pauli - Hamburg - Germany
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