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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-8492) Enhance Constant Folding to propagate constants for simple expressions
Date Fri, 17 Oct 2014 01:33:33 GMT
Ashutosh Chauhan created HIVE-8492:
--------------------------------------

             Summary: Enhance Constant Folding to propagate constants for simple expressions

                 Key: HIVE-8492
                 URL: https://issues.apache.org/jira/browse/HIVE-8492
             Project: Hive
          Issue Type: Improvement
          Components: Logical Optimizer
    Affects Versions: 0.14.0
            Reporter: Ashutosh Chauhan
            Assignee: Ashutosh Chauhan


currently it propagates only for projects, can be enhanced to propagate for simple expressions
like casts, e.g,
{code}
SELECT src1.key, src1.key + 1, src2.value                                                
                   FROM src src1 join src src2 ON src1.key = src2.key AND cast(src1.key as
double) = 86; 
{code}




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