The following steps show you how to insert or apply a previously
created ESQL or mapping user-defined function using the Compose Mapping Expression
editor.
From the Message Flow Mapping editor Overview, select the Target
Value that you want to edit. A small box appears at the
end of the row.
Click the box to open the Compose Mapping Expression editor. (Alternatively, from the Outline view, right-click the value that you
want to edit and click Edit Mapping to
open the Compose Mapping Expression editor.
In the top view, highlight the value to which you want to apply
the function, or the position where you want to add the function.
Select the type of function that you want to use from the drop-down
list.
Select the function by clicking the fast-forward arrow to the right
of this box.
Drag and drop the selected function onto the value or position
selected in step 3. If you drop the function onto a selected
value, that value is placed into the selected function at the appropriate
position. If you drop the function into a selected the position, the function
is placed there ready for you to add the necessary values into that function.