Re: recovery dump on database with different timezone

On 01/23/2017 03:45 PM, Edmundo Robles wrote:
> Hi!
>
> I have backed up a database with a 'UTC' timezone, but i can not to
> restore it on a database with 'localtime' timezone.

Dealing with time is complex, so some inline questions below to try to
figure out exactly what the setup is.

>
> I have a time constraints, the reason of the mistakes.
> * First, I did: 'alter database set timezone='UTC'; ' but no
> restore it...

On the database you took the backup from or the one you are restoring to?

> * After I did change 'timezone' to UTC in postgresql.conf and
> restart , but :(

From the source(backup) Postgres instance or the destination(restore)
instance?

> * at last, i did 'pg_restore -l backup.dmp| sed "s:+00:-06:g"|psql

The above is not the complete command, correct?

What is the complete command?

> database but copy fails with some records, so some tables are empty :(
> * i will try replacing +00 by empty string, but ...

In psql and in the receiving database, what does:

show timezone;

return?

Are the timestamp fields you are COPYing into declared with timezone or
without timezone?

>
> Why I can not restore it?
>
> * I have using postgresql 9.4
> * The backup is made it with pg_dump -Fc and
> * I try to restore with pg_restore -d database --disable-triggers
>
> * This is the message: COPY failed for table "stlm_201012ad": ERROR:
> new row for relation "stlm_201012ad" violates check constraint
> "time_stamp_201012ad"
> DETAIL: Failing row contains (..., 2011-01-01 00:00:03.925+00, .., 0).
>
> * this the constraint: "time_stamp_201012ad" CHECK (time_stamp >=
> '2010-12-01'::date AND time_stamp < '2011-01-01'::date)
>
> if change 2011-01-01 00:00:03.925+00 to 2011-01-01 00:00:03.925-06 works ok
> --
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com