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http://issues.apache.org/jira/browse/IBATIS-39?page=comments#action_57333 ]
     
David Putnam commented on IBATIS-39:
------------------------------------

Ok, I think I have resolved this through additional debugging sessions and 
re-reading the four documents.  I changed the in-line parameter references from 
#property# to #property:JDBCTYPE# and the null gets put in the database without 
a problem.

It seems that the best guess that the BasicParameterMap.setParameter can make 
is the Types.NULL or Types.OTHER.  However if the TypeHandler were called 
regardless of the null-ness of the propertyValue, the specific TypeHandler 
(DateTypeHandler in this case) could make a better guess at an appropriate JDBC 
type to use if one was not specified.  Maybe this issue could be changed to an 
Enhancement Request for that purpose.

> Unable to store null attributes as null values in a column
> ----------------------------------------------------------
>
>          Key: IBATIS-39
>          URL: http://issues.apache.org/jira/browse/IBATIS-39
>      Project: iBatis for Java
>         Type: Bug
>   Components: SQL Maps
>     Versions: 2.0.8
>  Environment: Standalone (no appserver) application in Java 1.4.2 connecting 
> to Sybase 12.5 using Sybase JDBC2 drivers (jconn2.jar)
>     Reporter: David Putnam
>     Priority: Blocker
>  Attachments: Customer.ibatis.xml, Customer.java, ibatis.xml, program log.txt
>
> Any null attribute throws a SQL Exception with an Unsupported JDBC type 0 
> message.  When I get back to the office I will copy actual error message and 
> configuration information into here.
> BTW I created this because I am not sure if there is a better forum for this. 
> Hopefully I am not cluttering this area with a simple configuration problem.

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