to_timestamp function - Mailing list pgsql-general

From Gustavsson Mikael
Subject to_timestamp function
Date
Msg-id 89DE7C43D727C04CA77C8B7AB82533CD022B4935BF@WINVMSERV464.ad.smhi.se
Whole thread Raw
Responses Re: to_timestamp function
List pgsql-general
Hi,

We recently upgraded from PG9.6 to PG11 and I have some questions regarding the function to_timestamp.

We have an application that for some reason unknown to me uses timestamps with hour = 24. 
After upgrade we got som problems with this. The solution is to use cast instead of the function but im curious if this is intentional.

Examles:

In PG9.6 this works:

to_timestamp('2019-03-20 24:00','YYYY-MM-DD HH24:MI')

but in PG11 we get:

ERROR:  date/time field value out of range.

I assume this have something to do with this row in releasenotes for PG10:

Make to_timestamp() and to_date() reject out-of-range input fields (Artur Zakirov)
  • For example, previously to_date('2009-06-40','YYYY-MM-DD') was accepted and returned 2009-07-10. It will now generate an error.


But.

This works in both PG9.6 and PG11:

'2019-03-20 24:00'::timestamp with time zone

and this generates an error in both PG9.6 and PG11:

'2009-06-40'::timestamp with time zone

So my question is, is it intentional that to_timestamp is stricter than cast to timestamp?

kr

Mikael Gustavsson
SMHI / Swedish Meteorological and Hydrological Institute

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