A base object is an object that contains data. A derived object is an object that inherits some attributes of the base object to perform a function related to that object. DDL statements that have both base and derived objects are:

• RENAME and ALTER RENAME

• CREATE and DROP on an index, synonym, or trigger

Consider the following DDL statement:

CREATE INDEX hr.indexPayrollDate ON TABLE hr.tabPayroll (payDate);

In this case, the table is the base object. Its name (hr.tabPayroll) is the base name and is subject to mapping with TABLE or MAP under the MAPPED scope. The derived object is the index, and its name (hr.indexPayrollDate) is the derived name.

You can map a derived name in its own TABLE or MAP statement, separately from that of the base object. Or, you can use one MAP statement to handle both. In the case of MAP, the conversion of derived object names on the target works as follows.