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From "Olga Natkovich (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (PIG-434) AND and OR do not give right results with nulls
Date Wed, 17 Sep 2008 15:27:44 GMT

     [ https://issues.apache.org/jira/browse/PIG-434?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Olga Natkovich resolved PIG-434.
--------------------------------

    Resolution: Fixed

patch committed, thanks, pradeep

> 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
>
>         Attachments: PIG-434.patch
>
>
> 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)
> {noformat}
>         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
> {noformat}

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