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Posted to issues@carbondata.apache.org by chenliang613 <gi...@git.apache.org> on 2018/02/01 15:42:19 UTC

[GitHub] carbondata pull request #1907: [Documentation] Data types for Dictionary exc...

Github user chenliang613 commented on a diff in the pull request:

    https://github.com/apache/carbondata/pull/1907#discussion_r165394741
  
    --- Diff: docs/data-management-on-carbondata.md ---
    @@ -44,13 +44,16 @@ This tutorial is going to introduce all commands and data operations on CarbonDa
       
        - **Dictionary Encoding Configuration**
     
    -     Dictionary encoding is turned off for all columns by default from 1.3 onwards, you can use this command for including columns to do dictionary encoding.
    +     Dictionary encoding is turned off for all columns by default from 1.3 onwards, you can use this command for including or excluding columns to do dictionary encoding.
          Suggested use cases : do dictionary encoding for low cardinality columns, it might help to improve data compression ratio and performance.
     
          ```
          TBLPROPERTIES ('DICTIONARY_INCLUDE'='column1, column2')
    +	 TBLPROPERTIES ('DICTIONARY_EXCLUDE'='column1, column2')
    --- End diff --
    
    By default, all columns are DICTIONARY_EXCLUDE, no need to specify.


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