The following bug has been logged online:
Bug reference: 2178
Logged by: Daniel Afonso Heisler
Email address: daniel(at)solis(dot)coop(dot)br
PostgreSQL version: 8.1.X
Operating system: Linux
Description: NOT IN command don't work
Details:
When i run the following query, postgreSQL return TRUE.
# SELECT true WHERE 1 NOT IN (2,3);
But, when i run the next query, it don't return TRUE
# SELECT true WHERE 1 NOT IN (2,NULL,3);
In theory, that is not correctly. The operator IN work with normally. See
the next example:
# SELECT true WHERE 1 IN (1,2,NULL,3);