IdKey
Set primary key constraint behavior.
Synopsis
n is either 1 or 0. The default value is 1.
Description
When IdKey is enabled (n = 1), when a Primary Key constraint is specified through DDL it does not also become the IDKey index in the class definition.
When this parameter is not enabled, a Primary Key constraint specified through DDL also becomes the IDKey index in the class definition. This ption generally gives better performance, but means that the Primary Key fields cannot be updated.
For further details, refer to the SET OPTION, CREATE TABLE, and ALTER TABLE commands.