Brian Cox wrote:
> I'd like to either 1) execute an alter table to re-add a constraint only
> if it doesn't exist or 2) have psql ignore the failure when setting it's
> exit status. Any ideas on how to do either would be appreciated.
I don't think there's a way to do that but you can look at the
pg_constraint table to see if it exists.
http://www.postgresql.org/docs/current/static/catalog-pg-constraint.html
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