Sequence Number Generation
The Sequence Generator transformation is great sometimes but I cannot find a way to reset the generated sequence based on external conditions. For example, when a value in the current row is different from the value in a previous row, I would like to reset the Sequence number.
Using some information I found on Informatica’s Knowledge base, I created a reusable Expression that will increment or reset a counter (sequence number) based on an input port's value. The counter will increment when a chosen input port's current row is equal to the previous row and reset the counter when the current row's value does not match the value from a previous row.
