LiFu He created KUDU-3033:
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             Summary: Add min/max values for the non-primary key columns in the 
metadata of rowsets/datablocks
                 Key: KUDU-3033
                 URL: https://issues.apache.org/jira/browse/KUDU-3033
             Project: Kudu
          Issue Type: New Feature
          Components: cfile, tablet
            Reporter: LiFu He


It's possible to add min/max values for the non-primary key columns in the 
metadata of diskrowset/datablock, and then we can skip decoding/evaluating the 
unnecessary diskrowset/datablock while scanning. Just like the "compute stats" 
feature on impala, and the only difference is that kudu supports updates. So, 
the min/max values should be invalid if the columns that have deltas while 
scanning.



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