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From "Bernt M. Johnsen (JIRA)" <derby-...@db.apache.org>
Subject [jira] Closed: (DERBY-729) Scalar time and date functions return 0 instead NULL when argument is NULL
Date Fri, 29 Sep 2006 12:02:52 GMT
     [ http://issues.apache.org/jira/browse/DERBY-729?page=all ]

Bernt M. Johnsen closed DERBY-729.
----------------------------------


> Scalar time and date functions return 0 instead NULL when argument is NULL
> --------------------------------------------------------------------------
>
>                 Key: DERBY-729
>                 URL: http://issues.apache.org/jira/browse/DERBY-729
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.1.3.2, 10.2.1.5
>            Reporter: Bernt M. Johnsen
>         Assigned To: Bernt M. Johnsen
>             Fix For: 10.3.0.0
>
>         Attachments: DERBY-729-1.diff, DERBY-729-1.stat
>
>
> The scalar time and date functions should return NULL when argument is NULL. 
> Sample ij run that reproduces the bug
>     ij> create table dt (ts timestamp);
>     0 rows inserted/updated/deleted
>     ij> insert into dt values ({ts '2005-11-28 14:49:40'}), (NULL);
>     2 rows inserted/updated/deleted
>     ij> select * from dt;
>     TS                        
>     --------------------------
>     2005-11-28 14:49:40.0     
>     NULL                      
>     
>     2 rows selected
>     ij> select {fn hour(ts)} from dt;
>     1          
>     -----------
>     14         
>     0
> might be a problem with other scalar functions too.

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