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Posted to issues@tajo.apache.org by "Jihoon Son (JIRA)" <ji...@apache.org> on 2014/10/14 16:49:33 UTC

[jira] [Created] (TAJO-1120) Enable every column stat when storing a table

Jihoon Son created TAJO-1120:
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             Summary: Enable every column stat when storing a table
                 Key: TAJO-1120
                 URL: https://issues.apache.org/jira/browse/TAJO-1120
             Project: Tajo
          Issue Type: Improvement
          Components: catalog
            Reporter: Jihoon Son
            Assignee: Jihoon Son
             Fix For: 0.9.1


Currently, the number of null values and the max/min values of a column are collected only in the shuffle stage.
In addition, the number of distinct values of a column seems not to be collected in anywhere. 
However, some recent issues such as TAJO-838 and TAJO-1091 require these statistics, and thus we need to collect them for tables that are newly stored via CTAS or INSERT INTO statements.



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