constraint for each output link

[cetzhbo]

Hello Gurus,

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

thanks very much!

[ray.wurlod]

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

[OddJob]

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!

[cetzhbo]

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

[chulett]

Yes.

[cetzhbo]

thanks, I got it