Wednesday, February 27, 2008

Differences between lookup and joiner?

What are the differences between lookup and joiner transformations?Which one is better performance-wise and why?

1 comment:

Siddharth said...

1)For look-up to work the table need not be present in the mapping.That means you can do a look-up on a table which need not be your source.
For a joiner to work the table must exist in the mapping.
2)Look-up can be configured to be unconnected but joiner cannot be unconnected.
3)Look-up does only non-equi join but joiner does outer join.