You can select the

Update Else Insert

property in the Lookup transformation. This property only applies to rows entering the Lookup transformation where the row type is update. When a row of any other row type, such as insert, enters the Lookup transformation, this property has no effect on how the Integration Service handles the row.

When you select this property and the row type entering the Lookup transformation is update, the Integration Service updates the row in the cache if the row exists in the index cache and the cache data is different than the existing row. The Integration Service inserts the row in the cache if it is new.

If you do not select this property and the row type entering the Lookup transformation is update, the Integration Service updates the row in the cache if it exists, and makes no change to the cache if the row is new.

If you select

Ignore Null

for all lookup ports not in the lookup condition and if all those ports contain null values, the Integration Service does not change the cache and the NewLookupRow value equals 0.

The following table describes how the Integration Service changes the lookup cache when the row type of the rows entering the Lookup transformation is update: