Hi

we have a scenario where we have a large table  ie 5-6B records. The table is repository of data from past N years. It is possible that some updates take place on the data and thus er are using Delta table. 

As part of the business process we know updates can happen only within M years of past records where M is much smaller than N. Eg the table can hold 20 yrs of data but we know updates can happen only for last year not before that. 

Is there some way to indicate this additional intelligence to Delta so it can look into only last years data while running a merge or update? It seems to be an obvious performance booster. 

Any thoughts?
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Best Regards,
Ayan Guha
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Best Regards,
Ayan Guha