anonymous wrote : should i change the type-mapping in postgres-ds.xml and in standardjaws.xml in PostgreSQL 8.0 instead of PostgreSQL? I havent tried changing Hypersonic DB to any other DB, but going by what is mentioned in the first post, you will have to change it to PostgreSQL 8.0 in the standardjaws.xml file and also in your postgres-ds.xml. Have a look at the link below, to see how PostgreSQL ds is setup: http://wiki.jboss.org/wiki/Wiki.jsp?page=SetUpAPostgreSQLDatasource In your ds.xml you will be having: <metadata> | <type-mapping>PostgreSQL 8.0</type-mapping> | </metadata> View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3962374#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...