Return-Path: 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 0AC53117E4 for ; Sun, 17 Aug 2014 21:20:20 +0000 (UTC) Received: (qmail 84911 invoked by uid 500); 17 Aug 2014 21:20:19 -0000 Delivered-To: apmail-hive-dev-archive@hive.apache.org Received: (qmail 84842 invoked by uid 500); 17 Aug 2014 21:20:19 -0000 Mailing-List: contact dev-help@hive.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@hive.apache.org Delivered-To: mailing list dev@hive.apache.org Received: (qmail 84823 invoked by uid 500); 17 Aug 2014 21:20:19 -0000 Delivered-To: apmail-hadoop-hive-dev@hadoop.apache.org Received: (qmail 84820 invoked by uid 99); 17 Aug 2014 21:20:19 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 17 Aug 2014 21:20:19 +0000 Date: Sun, 17 Aug 2014 21:20:19 +0000 (UTC) From: "Brock Noland (JIRA)" To: hive-dev@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HIVE-7373) Hive should not remove trailing zeros for decimal numbers MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/HIVE-7373?page=3Dcom.atlassian= .jira.plugin.system.issuetabpanels:all-tabpanel ] Brock Noland updated HIVE-7373: ------------------------------- Attachment: HIVE-7373.6.patch Looks like the build was broken. Re-uploading the same patch. > Hive should not remove trailing zeros for decimal numbers > --------------------------------------------------------- > > Key: HIVE-7373 > URL: https://issues.apache.org/jira/browse/HIVE-7373 > Project: Hive > Issue Type: Bug > Components: Types > Affects Versions: 0.13.0, 0.13.1 > Reporter: Xuefu Zhang > Assignee: Sergio Pe=C3=B1a > Attachments: HIVE-7373.1.patch, HIVE-7373.2.patch, HIVE-7373.3.pa= tch, HIVE-7373.4.patch, HIVE-7373.5.patch, HIVE-7373.6.patch, HIVE-7373.6.p= atch > > > Currently Hive blindly removes trailing zeros of a decimal input number a= s sort of standardization. This is questionable in theory and problematic i= n practice. > 1. In decimal context, number 3.140000 has a different semantic meaning = from number 3.14. Removing trailing zeroes makes the meaning lost. > 2. In a extreme case, 0.0 has (p, s) as (1, 1). Hive removes trailing zer= os, and then the number becomes 0, which has (p, s) of (1, 0). Thus, for a = decimal column of (1,1), input such as 0.0, 0.00, and so on becomes NULL be= cause the column doesn't allow a decimal number with integer part. > Therefore, I propose Hive preserve the trailing zeroes (up to what the sc= ale allows). With this, in above example, 0.0, 0.00, and 0.0000 will be rep= resented as 0.0 (precision=3D1, scale=3D1) internally. -- This message was sent by Atlassian JIRA (v6.2#6252)