Re: index over timestamp not being used - Mailing list pgsql-performance

Arnau <arnaulist@andromeiberica.com> writes:
>> Alternatively, do you really need to_timestamp at all?  The standard
>> timestamp input routine won't have any problem with that format:
>> t.timestamp_in >= '20070101'

> This is always I think I'm worried, what happens if one day the internal
> format in which the DB stores the date/timestamps changes. I mean, if
> instead of being stored as YYYYMMDD is stored as DDMMYYYY, should we
> have to change all the queries?

You are confusing internal storage format with the external
representation.

> I thought the
> to_char/to_date/to_timestamp functions were intented for this purposes

No, they're intended for dealing with wacky formats that the regular
input/output routines can't understand or produce.

            regards, tom lane