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From "Mamta A. Satoor (JIRA)" <derby-...@db.apache.org>
Subject [jira] Created: (DERBY-272) The description of the NULLIF function is incomplete.
Date Wed, 11 May 2005 21:11:10 GMT
The description of the NULLIF function is incomplete.
-----------------------------------------------------

         Key: DERBY-272
         URL: http://issues.apache.org/jira/browse/DERBY-272
     Project: Derby
        Type: Improvement
  Components: Documentation  
    Versions: 10.0.2.1    
    Reporter: Mamta A. Satoor
    Priority: Trivial


I was just trying to go through JIRA entry Derby-7 - a bug about NULLIF and looked up Derby
documentation on NULLIF and basically, there is not much. 

Came across Christian d'Heureuse's following posting on the same documentation issue and I
thought I would enter a JIRA entry so we can fix the docs.

http://mail-archives.apache.org/mod_mbox/db-derby-dev/200408.mbox/%3cLPBBIKDNOFAJGJOJBPNJMEMLCPAA.chdh@inventec.ch%3e

NULLIF Function

http://incubator.apache.org/derby/manuals/reference/sqlj66.html
("NULLIF and CASE expressions")

The Description of the NULLIF function is incomplete.

The definition in ISO 9075-2 could be used:
 NULLIF(V1,V2) is equivalent to the following:
  CASE WHEN V1=V2 THEN NULL ELSE V1 END



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