Differenct between Lookup Error Output and Lookup No Match Output

Question

Hi All
I'm new in SSIS and reading book for SSIS and unable to understand the difference between Lookup Error Output and Lookup No Match Output in Lookup transformation. Are these terms same or is there any difference between them ?. Please guide
Thanks
Regards
Muz

Answer 1

Nope. Error output is more generic ie any errors happening inside lookup can be redirected to error output by default. This includes lookup match failures as well as data conversion error, truncation error etc. Upto SSIS 2005 this was the only output available
in addition to match output inside lookup so if you want to capture unmatched rows you had to redirect them to error output itself.
But from SSIS 2008 onwards they've introduced one more output called no match output. This gives you ability to redirect only no matched rows through no match output so that you'll be able to distinguish between unmatched rows and other error rows.
You can configure this option inside Specify how to handle rows with no matching entries option in Lookup Editor. You can choose Ignore Failure,
Redirect rows to no match output,Redirect rows to error output etc as options
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