WHERE <timestamp-val>=NULL malfunction in release 7.2

Hi,

first of all let me tell all of you that PostgreSQL is among the best
in OpenSource!

Unfortunaly there's a (hopefully easy to fix) bug in release 7.2 and
7.2.1 that was not there in 7.1.3 and caused me to switch back today.

Here's the table I'm using (unfortunately I already switched back to
7.1.3 and therefore can't verify whether or not this occurs with an
easier setup):

i++=# \d uri
Table "uri"
Column | Type | Modifiers
--------------+--------------------------+-----------
template_id | integer |
content_id | integer | not null
freigegeben | timestamp with time zone |
gueltig_von | timestamp with time zone |
gueltig_bis | timestamp with time zone |
queue_status | integer |
site_id | integer |
uri | text |
Primary key: uri_pkey
Triggers: RI_ConstraintTrigger_17236,
RI_ConstraintTrigger_17242,
RI_ConstraintTrigger_17255,
RI_ConstraintTrigger_17257

And here we add sam sample data:

i++=# INSERT INTO uri VALUES (3,3,NULL);
INSERT 17604 1

Which is in the database:

i++=# select * from uri;
template_id | content_id | freigegeben |
gueltig_von | gueltig_bis | queue_status | site_id | uri
-------------+------------+-------------------------------+-------------------------------+-------------+--------------+---------+-------------
3 | 3 | |
| | | |
(1 rows)

However - if you want to access a <timestamp>=NULL value, it is not found :-((

i++=# select * from uri where freigegeben=NULL;
template_id | content_id | freigegeben | gueltig_von | gueltig_bis |
queue_status | site_id | uri
-------------+------------+-------------+-------------+-------------+--------------+---------+-----
(0 rows)

Hope to hear from you in a while - please reply directly to
mailto:ciechowski(at)cis-computer(dot)com, since I'm not on this list.

Ingo

--

-----BEGIN GEEK CODE BLOCK-----
Version: 3.1
GCM/IT/B/O d+(-) s+:++ a C++ UL++++$ P++$ L+++@ E- W+++@ N+ o? K? w-- O
M++@ V PS+ PE++ Y+ PGP++ t++ 5 X R tv+ b+@ DI+@ D--- G+ e? h-- r+++@ y?
------END GEEK CODE BLOCK------