While generating DDL for Pega7.2, i am unable to see rules schema in the system generated DDL file.

 am upgrading my 6.1 SP2 application to Pega 7.2. As per our company policy, i cant use UI tool to update DB.

The DDL has to be generated and our DBA review the standards before executing this in our DB. When performing this, i see only my data schema name in the DDL. no where in the .sql file i see rules schema. Can someone help me on this?