Re: [SQL] Unable to convert null timestamp to date. Bug?

[Tom Lane]

"Edmar Wiggers" <[EMAIL PROTECTED]> writes:
>   select * from users where last_visit + 7 > now();
>   ERROR:  Unable to convert null timestamp to date

Yeah, someone who hadn't quite grokked the concept of NULL seems to have
written a lot of the date.c code :-(.

This is fixed for 7.1.  If it's really bothering you in 7.0.*, see
src/backend/utils/adt/date.c, and change code like

    if (!PointerIsValid(timestamp))
        elog(ERROR, "Unable to convert null timestamp to date");

to

    if (!PointerIsValid(timestamp))
        return NULL;

in several places.

                        regards, tom lane