When you create a new inline default, SAP ASE looks for an existing shareable inline default that have the same value in the database belonging to the same user. If one exists, SAP ASE binds this object to the column instead of creating a new default.
However, if SAP ASE does not find an existing shareable inline default, it creates a new default.
SAP ASE shares inline defaults between tables only within the same database.
Enable shared inline defaults by setting enable functionality group to a value greater than 0. See, Setting Configuration Parameters, in the System Administration Guide, Volume 1.