Return-Path: X-Original-To: apmail-hive-issues-archive@minotaur.apache.org Delivered-To: apmail-hive-issues-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id E635C1804A for ; Fri, 9 Oct 2015 10:33:26 +0000 (UTC) Received: (qmail 83320 invoked by uid 500); 9 Oct 2015 10:33:26 -0000 Delivered-To: apmail-hive-issues-archive@hive.apache.org Received: (qmail 83296 invoked by uid 500); 9 Oct 2015 10:33:26 -0000 Mailing-List: contact issues-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 issues@hive.apache.org Received: (qmail 83286 invoked by uid 99); 9 Oct 2015 10:33:26 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 09 Oct 2015 10:33:26 +0000 Date: Fri, 9 Oct 2015 10:33:26 +0000 (UTC) From: "Matt McCline (JIRA)" To: issues@hive.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HIVE-11981) ORC Schema Evolution Issues (Vectorized, ACID, and Non-Vectorized) 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-11981?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Matt McCline updated HIVE-11981: -------------------------------- Attachment: (was: HIVE-11981.01.patch) > ORC Schema Evolution Issues (Vectorized, ACID, and Non-Vectorized) > ------------------------------------------------------------------ > > Key: HIVE-11981 > URL: https://issues.apache.org/jira/browse/HIVE-11981 > Project: Hive > Issue Type: Bug > Components: Hive, Transactions > Reporter: Matt McCline > Assignee: Matt McCline > Priority: Critical > Attachments: HIVE-11981.01.patch, ORC Schema Evolution Issues.docx > > > High priority issues with schema evolution for the ORC file format. > Schema evolution here is limited to adding new columns and a few cases of column type-widening (e.g. int to bigint). > Renaming columns, deleting column, moving columns and other schema evolution were not pursued due to lack of importance and lack of time. Also, it appears a much more sophisticated metadata would be needed to support them. > The biggest issues for users have been adding new columns for ACID table (HIVE-11421 Support Schema evolution for ACID tables) and vectorization (HIVE-10598 Vectorization borks when column is added to table). -- This message was sent by Atlassian JIRA (v6.3.4#6332)