Return-Path: 
 <dev-return-59284-apmail-hive-dev-archive=hive.apache.org@hive.apache.org>
X-Original-To: apmail-hive-dev-archive@www.apache.org
Delivered-To: apmail-hive-dev-archive@www.apache.org
Received: from mail.apache.org (hermes.apache.org [140.211.11.3])
	by minotaur.apache.org (Postfix) with SMTP id CA0D8F02F
	for <apmail-hive-dev-archive@www.apache.org>;
 Tue, 13 Aug 2013 06:46:52 +0000 (UTC)
Received: (qmail 44272 invoked by uid 500); 13 Aug 2013 06:46:50 -0000
Delivered-To: apmail-hive-dev-archive@hive.apache.org
Received: (qmail 43967 invoked by uid 500); 13 Aug 2013 06:46:50 -0000
Mailing-List: contact dev-help@hive.apache.org; run by ezmlm
Precedence: bulk
List-Help: <mailto:dev-help@hive.apache.org>
List-Unsubscribe: <mailto:dev-unsubscribe@hive.apache.org>
List-Post: <mailto:dev@hive.apache.org>
List-Id: <dev.hive.apache.org>
Reply-To: dev@hive.apache.org
Delivered-To: mailing list dev@hive.apache.org
Received: (qmail 43931 invoked by uid 500); 13 Aug 2013 06:46:49 -0000
Delivered-To: apmail-hadoop-hive-dev@hadoop.apache.org
Received: (qmail 43927 invoked by uid 99); 13 Aug 2013 06:46:49 -0000
Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28)
    by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 13 Aug 2013 06:46:49 +0000
Date: Tue, 13 Aug 2013 06:46:49 +0000 (UTC)
From: "Teddy Choi (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Message-ID: <JIRA.12662506.1375914258087.52863.1376376409630@arcas>
In-Reply-To: <JIRA.12662506.1375914258087@arcas>
References: <JIRA.12662506.1375914258087@arcas>
Subject: [jira] [Commented] (HIVE-5022) Decimal Arithmetic generates NULL
 value
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394


    [ https://issues.apache.org/jira/browse/HIVE-5022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13737917#comment-13737917 ] 

Teddy Choi commented on HIVE-5022:
----------------------------------

The result of division has the maximum precision. The following multiplication makes a result with a greater precision than the maximum precision, so it causes an error. https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=27838462#LanguageManualTypes-FloatingPointTypes provides more information.

Please use ROUND() to reduce precisions or use DOUBLE to be tolerant of precision issues.
                
> Decimal Arithmetic generates NULL value
> ---------------------------------------
>
>                 Key: HIVE-5022
>                 URL: https://issues.apache.org/jira/browse/HIVE-5022
>             Project: Hive
>          Issue Type: Bug
>          Components: Types
>    Affects Versions: 0.11.0
>         Environment: Hortonworks 1.3 running Hive 0.11.0.1.3.0.0-107
>            Reporter: Kevin Soo Hoo
>
> When a decimal division is the first operation, the quotient cannot be multiplied in a subsequent calculation. Instead, a NULL is returned. 
> The following yield NULL results:
> select (cast (4.53 as decimal) / cast(25.86 as decimal)) * cast(0.087 as decimal) from <tablename> limit 1;
> select cast (4.53 as decimal) / cast(25.86 as decimal) * cast(0.087 as decimal) from <tablename> limit 1;
> If we move the multiplication operation to be first, then it will successfully calculate the result.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira