Tom Lane wrote
> Decibel! <decibel@decibel.org> writes:
> > When restoring from pg_dump(all), if a problem occurs in a COPY
> > command you're going to get a whole slew of errors, because
> as soon
> > as COPY detects a problem it will throw an error and psql will
> > immediately switch to trying to process the remaining data
> that was
> > meant for COPY as if it was psql commands. This is confusing and
> > annoying at best; it could conceivably trash data at worst
> (picture
> > dumping a table that had SQL commands in it).
>
> This is nonsense; it hasn't worked that way since we went to v3
> protocol.
>
> What is true is that if the COPY command itself is thoroughly borked,
> the backend never tells psql to switch into COPY mode in the first
> place.
I had an annoying experience with COPY within psql yesterday.
I had a dump of just three tables, which I wanted to investigate. I tried loading them into an empty database, using
psql's\i command.
The table creation failed as dependent tables/sequences where absent.
The copy command failed as the tables did not exist.
The data intended as the input to the copy statement resulted in a large number of error messages.
> > My idea to avoid this situation is to add an option to COPY that
> > tells it not to throw an error until it runs out of input data.
>
> This will not solve the problem, since again it only works if the COPY
> command gets to execution.
It is only now that I've found the \set ON_ERROR_STOP command, which I presume would have solved my problem.
Regards,
Stephen Denne.
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