I used to write PL/SQL long time back. In old days, every business logic was written in stored procedures, which the java code calls. Migrating stored procedure

I used to write PL/SQL long time back. In old days, every business logic was written in stored procedures, which the java code calls. Migrating stored procedures is a hard part since whoever wrote it left the company long time ago. Whatever talent available in the company that wants to migrate off Oracle, would not want to take the risks of migration failure.