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 4B6FB10E98 for ; Thu, 4 Dec 2014 00:57:13 +0000 (UTC) Received: (qmail 40840 invoked by uid 500); 4 Dec 2014 00:57:12 -0000 Delivered-To: apmail-hive-dev-archive@hive.apache.org Received: (qmail 40706 invoked by uid 500); 4 Dec 2014 00:57:12 -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 40379 invoked by uid 500); 4 Dec 2014 00:57:12 -0000 Delivered-To: apmail-hadoop-hive-dev@hadoop.apache.org Received: (qmail 40333 invoked by uid 99); 4 Dec 2014 00:57:12 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 04 Dec 2014 00:57:12 +0000 Date: Thu, 4 Dec 2014 00:57:12 +0000 (UTC) From: "Ashutosh Chauhan (JIRA)" To: hive-dev@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HIVE-9015) Constant Folding optimizer doesn't handle expressions involving null 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-9015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14233731#comment-14233731 ] Ashutosh Chauhan commented on HIVE-9015: ---------------------------------------- Similarly, {code} hive> explain select (null + a) from t1; TableScan Select Operator expressions: (null + a) (type: double) {code} expression here can also be replaced with null > Constant Folding optimizer doesn't handle expressions involving null > -------------------------------------------------------------------- > > Key: HIVE-9015 > URL: https://issues.apache.org/jira/browse/HIVE-9015 > Project: Hive > Issue Type: Task > Reporter: Ashutosh Chauhan > > Expressions which are guaranteed to evaluate to {{null}} aren't folded by optimizer yet. -- This message was sent by Atlassian JIRA (v6.3.4#6332)