Horton

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

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: "Edmar Wiggers" <edmar@brasmap.com>
Cc: pgsql-sql@postgresql.org, pgsql-bugs@postgresql.org
Date: 2000-12-08T01:01:51Z
Lists: pgsql-bugs 
"Edmar Wiggers" <edmar@brasmap.com> 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