[GitHub] [carbondata] ShreelekhyaG opened a new pull request #4113: [WIP] Describe complex columns

Posted by GitBox on Mar 29, 2021; 8:29am
URL: http://apache-carbondata-dev-mailing-list-archive.168.s1.nabble.com/GitHub-carbondata-ShreelekhyaG-opened-a-new-pull-request-4113-WIP-Describe-complex-columns-tp107265.html


ShreelekhyaG opened a new pull request #4113:
URL: https://github.com/apache/carbondata/pull/4113


    ### Why is this PR needed?
    Currently describe formatted displays the column information of a table and some additional information. When complex types such as  ARRAY, STRUCT, and MAP types are present in the table, column definition can be long and it’s difficult to read in a nested format.
   
    ### What changes were proposed in this PR?
   For complex types available, the DESCRIBE output can be formatted to avoid long lines for multiple fields. We can pass the complex field name to the command and visualize its structure as if were a table.
   
   DDL Commands:
   ```
   DESCRIBE COLUMN fieldname ON [db_name.]table_name;
   DESCRIBE short [db_name.]table_name;
   ```
       
    ### Does this PR introduce any user interface change?
    - Yes
   
    ### Is any new testcase added?
    - Yes
   
       
   


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