You are not logged in.
i need help with tMap expression. Actually i don't know anything of Java and SQL Language. Therfore Talend is a very helpful tool for me. But for my current task I need to know how to give some simple expressions into tMap.
As you can see in the screenshoot, I have two "column1" and "column2". All columns are in float. I want the difference between the two values in the "D" column.
I tried the following expression in a test tMap:
row1.column1 - row1.column2
But it just gives me a nullPointerException...
Can someone help me?