Use the default system variable, rs_default_fs, to extend and customize function strings.
Extend function strings with
replication-definition scope to include additional commands (such
as those for auditing or tracking)
Customize rs_update and rs_delete function
strings and still be able to use the replicate minimal
columns option in your replication definitions
Note: Function strings containing the rs_default_fs system
variable may only be applied on Adaptive Servers or data servers
that accept Adaptive Server syntax. Otherwise, errors will occur.
See Replication Server Reference Manual > Replication Server Commands > create function string for
a complete list of function string system variables.