Re: to_date function

Carlos Henrique Reimer <carlos.reimer@opendb.com.br> writes:
> I've a Linux box running postgresql 8.2.17 and facing some strange results
> from the to_date function.

> As you can see in the following tests the problem occurs when the template
> used includes upper and lower case characters for the minute (Mi or mI).

> Am I using the incorrect syntax or is it a bug?

The defined template patterns are MI and mi.  Random combinations of case
aren't accepted.  I believe what's actually happening is that the code
is seeing this as separate letters m (which matches nothing so it's not
a template pattern but just constant text) and i or I, which are the
ISO-week patterns.  More recent versions of PG throw an error

ERROR:  invalid combination of date conventions
HINT:  Do not mix Gregorian and ISO week date conventions in a formatting template.

but 8.2 probably just does something not too sensible with trying to
combine the ISO and Gregorian field values :-(

            regards, tom lane