informatica mapping to assign values of column1 po

问题:

Input

column1         
11                  
12                
13                     
14               

Desired output

Colmn1   column2
11        Null
12        11
13        12

I have added the ports in the order as below in expression,

column1 - colmn1
V-count - V_count+1
column2 - iif(V_count=1,null,v_col)
V_col   - column1

Since I studied as like the order of ports matters the execution order.so I added the v_col at last. But for column2 1st position is null and the remaining values in column2 are as same as column1.

Can anyone tell what should I have to do to get the expected result?

回答1:

The execution order does depend on the display order but only for variable ports - the Integration Service first evaluates input ports, then the variable ones (in the display order) and last the output ports (details).

You need two variable ports:

PORT             EXPRESSION
column1          N/A (for in-out port)
v_prev_column1   v_curr_column1
v_curr_column1   column1
column2          v_prev_column1