Re: BUG #11014: Postgres can be put into an error state by setting invalid timezone.

Tom Lane-2 wrote
> dgillis@

>  writes:
>> postgres=# set timezone='-0400';
>> SET
>> postgres=#
>> postgres=# show timezone;
>>  TimeZone
>> ----------
>>  unknown
>> (1 row)
>
>> postgres=# select now();
>> The connection to the server was lost. Attempting reset: Failed.
>
> Oh, hm, looks like it didn't occur to us that pg_tzset could reject
> out-of-range input :-(.
>
> Previous versions of PG would allow this, interpreting the GMT offset
> as 400 hours.  In 9.4, the data is fed to the zic library, which thinks
> that the zone offset shouldn't exceed 1 week (168 hours); and we're
> not defending against a null result.
>
> While it's easy enough to add an error check, I wonder if there's an
> actual use-case for such a large zone offset?  Or were you just
> playing around?

This does seem kind of a harsh for a mis-understanding that one cannot
specify a hours offset as a valid timezone identifier.  ISTM the OP was
trying to set the timezone to EDT by specifying a -04 hours and 00 minutes
offset (- 04 00 = -0400 )...a 4-digit input like this shouldn't be
considered a -400 hour GMT offset...



David J.








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