The database field SCHEDULER_INSTANCES.DB_NAME is too short for some JDBC connection strings

Current Situation

The createDailySchedules job writes the JDBC connection string into the database field SCHEDULER_INSTANCES.DB_NAME which is a varchar(250).
JDBC urls in Oracle particularly could be longer so that the job raises the error

ORA-12899: value too large for column "SCHEDULER_INSTANCES"."DB_NAME" (actual: xxx, maximum: 250)

Maintainer Notes

The field will be created as varchar(1000) in the setup.