Siebel Remote and Replication Manager Administration Guide > Configuring the Siebel Server > Running the Generate New Database Server Component >

Using a Character Data Type with an Extension Column

If you create a new extension column in the Siebel schema, and if you define the Datatype as Character (CHAR), then Transaction Merger might not work properly if the length is greater than 1. If the length is greater than 1, then you must use VARCHAR as the Datatype.