The column "objecttype" in the "openidm.objecttypes" table are defined differently for different databases that IDM supports. The "objecttype" for MSSQL and DB2 are defined as "NOT NULL". MySQL, Oracle, and PostgreSQL have "objecttype" defined as "NULL". An object type can never be null so we have changed the openidm.sql scripts for all DBs to consistently be “NOT NULL”.
The following are database specific commands that can be executed to upgrade each repo from 6.0 -> 6.5.