[jira] [Created] (TAJO-117) Implement count column (i.e., count(col) ) aggregation primitive function

[Hyunsik Choi (JIRA)]

Hyunsik Choi created TAJO-117:
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             Summary: Implement count column (i.e., count(col) ) aggregation 
primitive function
                 Key: TAJO-117
                 URL: https://issues.apache.org/jira/browse/TAJO-117
             Project: Tajo
          Issue Type: Sub-task
            Reporter: Hyunsik Choi




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