re: IS NULL problem with dates; confirmed on 3.23.x && 4.09

[Victoria Reznichenko <suppressed>]

On Wednesday 05 February 2003 02:07, aah at volunteermatch dot org wrote:

> >Description:
>
> 	Multiple IS NULL tests in a WHERE clause appear to be broken
> 	when testing NOT NULL date fields.  Queries work fine against
> 	varchar and int, probably(?) others.
>
> >How-To-Repeat:
>
> 	create temporary table test (a date not null, b date not null);
> 	insert into test values (now(), now());
> 	insert into test values (now(), now());
> 	select count(*) from test where a is null or b is null;
>
> 	The SELECT query should return 0, instead it returns every row
> 	in the table (2 in this case).  For what it's worth, the
> 	query returns the right number for int and varchar fields, and
> 	returns the right number if the columns allow null values.

Thanks for bug report! It's fixed.


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