Allow user to specify which columns appear in a Source input transformer in the Transformation editor

[GoogleCodeExporter]

What steps will reproduce the problem?
1. All you need is to start any DQguru project with a source table that has
a lot of columns (around 30 or more). The input transformer starts with way
too many inputs. If you don't need all of them (you're only cleansing a few
columns), then perhaps there should be an interface to select which columns
will be available as inputs. For example, something that brings up a list
of checkboxes for each column, and you check which columns you'd make
available, including a 'select all' and 'select none' option.

Original issue reported on code.google.com by mo.j...@gmail.com on 29 Oct 2009 at 3:19