Return-Path: X-Original-To: apmail-crunch-dev-archive@www.apache.org Delivered-To: apmail-crunch-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 BAEE41140C for ; Fri, 1 Aug 2014 23:21:39 +0000 (UTC) Received: (qmail 57901 invoked by uid 500); 1 Aug 2014 23:21:39 -0000 Delivered-To: apmail-crunch-dev-archive@crunch.apache.org Received: (qmail 57872 invoked by uid 500); 1 Aug 2014 23:21:39 -0000 Mailing-List: contact dev-help@crunch.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@crunch.apache.org Delivered-To: mailing list dev@crunch.apache.org Received: (qmail 57765 invoked by uid 500); 1 Aug 2014 23:21:39 -0000 Delivered-To: apmail-incubator-crunch-dev@incubator.apache.org Received: (qmail 57742 invoked by uid 99); 1 Aug 2014 23:21:39 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 01 Aug 2014 23:21:39 +0000 Date: Fri, 1 Aug 2014 23:21:39 +0000 (UTC) From: "Zhong Wang (JIRA)" To: crunch-dev@incubator.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (CRUNCH-450) Adding ORC file format support in Crunch 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/CRUNCH-450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14083166#comment-14083166 ] Zhong Wang commented on CRUNCH-450: ----------------------------------- Hi Josh, 1) tupleDerived functions work as wrappers if there is only a single object to serialize to OrcStruct (basic unit for orc serialization). The functions will wrap the single object with a tuple, and use TupleObjectInspector to serialize it to OrcStruct. Collections and maps are the same as other primitives except that they need a real deep copier 2) I am not sure what you mean by executing a MapReduce job purely in OrcTypes. We can combine different type families in a single MapReduce job, such as using OrcTypes as input, Writables as shuffle and Avros as the output. The OrcTypeFamily exists to serialize/deserialize java objects to/from OrcStructs > Adding ORC file format support in Crunch > ---------------------------------------- > > Key: CRUNCH-450 > URL: https://issues.apache.org/jira/browse/CRUNCH-450 > Project: Crunch > Issue Type: New Feature > Components: Core, IO > Reporter: Zhong Wang > Assignee: Josh Wills > Fix For: 0.11.0 > > Attachments: CRUNCH-450-submodule.1.patch, CRUNCH-450-submodule.2.patch, CRUNCH-450-submodule.patch, CRUNCH-450.patch > > > This JIRA adds ORC file format support in Crunch by: > -- > 1. Adding input source and output target for ORC > 2. Adding a new type family - OrcTypeFamily to serialize / deserialize objects into OrcStruct > 3. Supporting column pruning optimization -- This message was sent by Atlassian JIRA (v6.2#6252)