alex gemini created AVRO-1195:
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             Summary: trevni should support dictionary encoding based on 
selectivity and data type
                 Key: AVRO-1195
                 URL: https://issues.apache.org/jira/browse/AVRO-1195
             Project: Avro
          Issue Type: Improvement
    Affects Versions: 1.8.0
            Reporter: alex gemini
            Priority: Minor


it would be nice if trevni support dictionary encoding. columnar format should 
first sort the columnar order based on selectivity .for lower selectivity 
column such as email or address trenvi should support dictionary encoding .more 
information will be found in paper "C-Store: A Column-oriented DBMS" section 
3.1 :Encoding Schemes,type 4.

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