Re: ISO8601 vs POSIX offset clarification

To be more specific, I expected the output of both these queries to be the
same.

# select '2017-12-01 11:00:00 +11:00'::timestamp with time zone at time
zone '+11:00';

timezone

---------------------

2017-11-30 13:00:00

# select '2017-12-01 11:00:00 +11:00'::timestamp with time zone at time
zone 'Australia/Melbourne';

timezone

---------------------

2017-12-01 11:00:00

Cheers

On 4 December 2017 at 13:59, Bharanee Rathna <deepfryed(at)gmail(dot)com> wrote:

> Sorry I didn't mean for it to come out as a complaint, just that I am
> confused since the result of the SQL query was not what I expected. I
> expected +11:00 to be 11 hours east of UTC which wasn't the case.
>
>
>
> On 4 December 2017 at 13:55, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
>> Bharanee Rathna <deepfryed(at)gmail(dot)com> writes:
>> > the documentation around how numeric offsets are parsed from strings is
>> a
>> > bit confusing, are they supposed to be treated as ISO8601 or POSIX ?
>>
>> Our documentation about this says clearly that Postgres considers offsets
>> to be ISO (positive-east-of-Greenwich) everywhere except in POSIX-style
>> time zone names.
>>
>> > The Table 8-12. Time Zone Input section at
>> > https://www.postgresql.org/docs/9.3/static/datatype-datetime.html
>> seems to
>> > imply that numeric offsets would be treated as ISO8601.
>>
>> How do you read an entry such as
>>
>> -8:00 | ISO-8601 offset for PST
>>
>> as being in any way vague about which convention the "-8" is read in?
>>
>> regards, tom lane
>>
>
>