Return-Path: X-Original-To: apmail-avro-user-archive@www.apache.org Delivered-To: apmail-avro-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id AE8229DB8 for ; Mon, 23 Jan 2012 22:44:11 +0000 (UTC) Received: (qmail 93663 invoked by uid 500); 23 Jan 2012 22:44:11 -0000 Delivered-To: apmail-avro-user-archive@avro.apache.org Received: (qmail 93588 invoked by uid 500); 23 Jan 2012 22:44:10 -0000 Mailing-List: contact user-help@avro.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@avro.apache.org Delivered-To: mailing list user@avro.apache.org Received: (qmail 93580 invoked by uid 99); 23 Jan 2012 22:44:10 -0000 Received: from minotaur.apache.org (HELO minotaur.apache.org) (140.211.11.9) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 23 Jan 2012 22:44:10 +0000 Received: from localhost (HELO [192.168.168.16]) (127.0.0.1) (smtp-auth username cutting, mechanism plain) by minotaur.apache.org (qpsmtpd/0.29) with ESMTP; Mon, 23 Jan 2012 22:44:10 +0000 Message-ID: <4F1DE2B9.5090609@apache.org> Date: Mon, 23 Jan 2012 14:44:09 -0800 From: Doug Cutting User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.24) Gecko/20111108 Thunderbird/3.1.16 MIME-Version: 1.0 To: user@avro.apache.org Subject: Re: using avro schemas to select columns (abusing versioning?) References: In-Reply-To: X-Enigmail-Version: 1.1.2 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit On 01/23/2012 02:18 PM, Koert Kuipers wrote: > is this considered "abuse" of avro's versioning capabilities? Not at all. Using a subset of the fields in Avro is called "projection" and can provide significant performance improvements. Doug