Hi,
I just want to know the sequence in which the transformer components operate i.e Stage variable,constraints and derivation.Which one operates 1st.....
Regards
Arnie
SEQUENCE OF OPERATION IN TRANSFORMER
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1. Before-stage trigger.
2. Input link.
3. Stage variables, top down in their grid.
4. For each output link, the constraint expression is evaluated and, if satisfied, the output column derivation expressions are evaluated and the row put onto the output.
5. If there is an otherwise/log output link and the current row has not thus far been put onto any prior output link, then the output column derivation expressions on the otherwise/log output link are evaluated and the row put onto that output.
6. After-stage trigger.
While all that is going on, any row that causes an exception to be raised will be sent to the reject output link (if any).
2. Input link.
3. Stage variables, top down in their grid.
4. For each output link, the constraint expression is evaluated and, if satisfied, the output column derivation expressions are evaluated and the row put onto the output.
5. If there is an otherwise/log output link and the current row has not thus far been put onto any prior output link, then the output column derivation expressions on the otherwise/log output link are evaluated and the row put onto that output.
6. After-stage trigger.
While all that is going on, any row that causes an exception to be raised will be sent to the reject output link (if any).
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Any contribution to this forum is my own opinion and does not necessarily reflect any position that IBM may hold.