How to let "timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP" on mysql work in liquibase?

Hi,

I found a topic below: http://www.mail-archive.com/liquibase-user@lists.sourceforge.net/msg00079.html

But when I try it, it does not work. I looked at the code in function AbstractTypeConverter::getDataType() like below. It means datetime will always be used if I use a type including other characters except timestamp.

        } else if (dataTypeName.toUpperCase().contains(“TIMESTAMP”)) {
            returnTypeName = getDateTimeType();

Is it a designed behaviour?

Thanks.
David Li