DSXchange

Hello Gurus,

for transformer stage, constraint for each output link is in effect before derivation or after derivation of output column?

thanks very much!

Output column derivations are only performed if the link's constraint expression is satisfied.

Looking at the generated C++ from a transformer, things happen in the following order:

Stage Variables evaluated

Constraint evaluated
If Constraint is True, the output column derivations are performed
If Constraint is False, output for column is skipped - no derivations are made

Hope this helps!

thanks, but does stage variable/constraint/output derivation are evaluated row by row ?

Yes.

thanks, I got it