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 93F861123F for ; Thu, 24 Jul 2014 13:38:40 +0000 (UTC) Received: (qmail 338 invoked by uid 500); 24 Jul 2014 13:38:40 -0000 Delivered-To: apmail-hive-dev-archive@hive.apache.org Received: (qmail 270 invoked by uid 500); 24 Jul 2014 13:38:40 -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 249 invoked by uid 500); 24 Jul 2014 13:38:40 -0000 Delivered-To: apmail-hadoop-hive-dev@hadoop.apache.org Received: (qmail 241 invoked by uid 99); 24 Jul 2014 13:38:40 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 24 Jul 2014 13:38:40 +0000 Date: Thu, 24 Jul 2014 13:38:39 +0000 (UTC) From: "Ted Xu (JIRA)" To: hive-dev@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HIVE-5771) Constant propagation optimizer for Hive 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-5771?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Ted Xu updated HIVE-5771: ------------------------- Status: Patch Available (was: Open) > Constant propagation optimizer for Hive > --------------------------------------- > > Key: HIVE-5771 > URL: https://issues.apache.org/jira/browse/HIVE-5771 > Project: Hive > Issue Type: Improvement > Components: Query Processor > Reporter: Ted Xu > Assignee: Ted Xu > Attachments: HIVE-5771.1.patch, HIVE-5771.10.patch, HIVE-5771.11.patch, HIVE-5771.12.patch, HIVE-5771.14.patch, HIVE-5771.2.patch, HIVE-5771.3.patch, HIVE-5771.4.patch, HIVE-5771.5.patch, HIVE-5771.6.patch, HIVE-5771.7.patch, HIVE-5771.8.patch, HIVE-5771.9.patch, HIVE-5771.patch, HIVE-5771.patch.javaonly > > > Currently there is no constant folding/propagation optimizer, all expressions are evaluated at runtime. > HIVE-2470 did a great job on evaluating constants on UDF initializing phase, however, it is still a runtime evaluation and it doesn't propagate constants from a subquery to outside. > It may reduce I/O and accelerate process if we introduce such an optimizer. -- This message was sent by Atlassian JIRA (v6.2#6252)