This graphic shows a simple mapping run in row-based (Target only) mode. To the left is a table TAB1. To the center is FLTR, representing a Filter operator. To the right is a table TAB2. Arrows connect TAB1 to FLTR and FLTR to TAB2.
The output of TAB1 is SQL and is provided as input to the Filter. The output of the filter is SQL. During data transfer, the output from the filter is converted from SQL to PL/SQL and is provided as an input to a table TAB2.