There are several ways you can work with functions and function strings to customize database operations.
Create a new function-string class for use with a specific type of database, and customize some or all of the function strings.
For atomic materialization, use a function from a function-string class associated with the primary database connection, not a function from the function-string class associated with the replicate database connection.
Alter function strings for the system-provided function-string class, rs_sqlserver_function_class.
Create a function-string class that inherits, either directly or indirectly, function strings from the system-provided function-string class rs_default_function_class.
Use the system-provided function-string classes for non-ASE data servers: rs_iq_function_class, rs_db2_function_class, rs_hanadb_function_class, rs_mss_function_class, or rs_oracle_function_class. See Replication Server Administration Guide Volume 1 > Manage Replicated Tables > Translate Datatypes Using HDS for detailed information on datatype translations using the heterogeneous datatype support (HDS) feature.
You can work with functions, function strings, and classes using Sybase Central™ or RCL commands that you enter at the command line using isql.
See Replication Server Reference Manual > Replication Server System Functions for more information about the system functions.