Oracle and Invalid column type:

[Robert Dare]

Hi all,

The iBATIS-SqlMaps-2.pdf Developer Guide notes that when
using an Oracle driver, one mustspecify the SQL type of
a column if it is nullable.  

For doing inserts, does this mean that one must use a 
<parameterMap> rather than just passing in a classType
in the statement XML?

I read elsewhere in the iBATIS documentation that there is
a performance gain by using the classType rather than a 
parameterMap attribute in the statement XML.

Can anyone enlighten me on this subject?

Regards,

Rob.