Hi @bambrozio, thank you for starting this thread and beginning work on the CDM DDL for DB2.
Since you are new to the community, I want to direct you to prior discussions around database support. The OMOP CDM is just a data standard, which could likely be implemented in any relational database system. But within the OHDSI community, we have also built a large (and growing) technology ecosystem with standardized analytics tools that require the supported RDBMSs to have a consistent set of analytics functions. We have packages that would need to be made compatible with any new RDBMS, including DatabaseConnector and SQLRender. So, when we talk about ‘database support’ for the OMOP CDM, it goes beyond the data standard to include the open-source toolkit that OHDSI has developed based on the CDM.