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Posted to issues@carbondata.apache.org by "Manish Gupta (JIRA)" <ji...@apache.org> on 2018/04/26 09:40:00 UTC

[jira] [Created] (CARBONDATA-2405) Implement columnar filling during query result preparation in DictionaryBasedResultCollector

Manish Gupta created CARBONDATA-2405:
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             Summary: Implement columnar filling during query result preparation in DictionaryBasedResultCollector
                 Key: CARBONDATA-2405
                 URL: https://issues.apache.org/jira/browse/CARBONDATA-2405
             Project: CarbonData
          Issue Type: Sub-task
            Reporter: Manish Gupta
            Assignee: Manish Gupta


When the number of columns in a query are greater than 100 then DictionaryBasedResultCollector  is selected for result preparation. DictionaryBasedResultCollector  fills the result row wise which reduces the query performance.

Same as compaction we need to implement columnar filling of results in DictionaryBasedResultCollector  so as to improve the query performance when the number of columns in a query are greater than 100.



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