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From "Pradeep Kamath (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-434) AND and OR do not give right results with nulls
Date Tue, 16 Sep 2008 21:41:44 GMT
AND and OR do not give right results with nulls
-----------------------------------------------

                 Key: PIG-434
                 URL: https://issues.apache.org/jira/browse/PIG-434
             Project: Pig
          Issue Type: Bug
    Affects Versions: types_branch
            Reporter: Pradeep Kamath
             Fix For: types_branch


Here are the truth tables for AND and OR - currently we do not short circuit and return a
null if either operand is null (for both AND and OR)

{code}

        // truth table for AND 
        // t = true, n = null, f = false
        // AND  t n f
        // t    t n f
        // n    n n f
        // f    f f f


        // truth table for OR 
        // t = true, n = null, f = false
        // OR   t n f
        // t    t t t
        // n    t n n
        // f    t n f

{code}

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