Return-Path: 
 <commits-return-146813-apmail-cassandra-commits-archive=cassandra.apache.org@cassandra.apache.org>
X-Original-To: apmail-cassandra-commits-archive@www.apache.org
Delivered-To: apmail-cassandra-commits-archive@www.apache.org
Received: from mail.apache.org (hermes.apache.org [140.211.11.3])
	by minotaur.apache.org (Postfix) with SMTP id 17FAD18CE5
	for <apmail-cassandra-commits-archive@www.apache.org>;
 Thu, 24 Sep 2015 04:46:05 +0000 (UTC)
Received: (qmail 32147 invoked by uid 500); 24 Sep 2015 04:46:04 -0000
Delivered-To: apmail-cassandra-commits-archive@cassandra.apache.org
Received: (qmail 32113 invoked by uid 500); 24 Sep 2015 04:46:04 -0000
Mailing-List: contact commits-help@cassandra.apache.org; run by ezmlm
Precedence: bulk
List-Help: <mailto:commits-help@cassandra.apache.org>
List-Unsubscribe: <mailto:commits-unsubscribe@cassandra.apache.org>
List-Post: <mailto:commits@cassandra.apache.org>
List-Id: <commits.cassandra.apache.org>
Reply-To: dev@cassandra.apache.org
Delivered-To: mailing list commits@cassandra.apache.org
Received: (qmail 32102 invoked by uid 99); 24 Sep 2015 04:46:04 -0000
Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28)
    by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 24 Sep 2015 04:46:04 +0000
Date: Thu, 24 Sep 2015 04:46:04 +0000 (UTC)
From: "Sam Tunnicliffe (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: <JIRA.12859860.1440753394000.58997.1443069964461@Atlassian.JIRA>
In-Reply-To: <JIRA.12859860.1440753394000@Atlassian.JIRA>
References: <JIRA.12859860.1440753394000@Atlassian.JIRA>
 <JIRA.12859860.1440753394114@arcas>
Subject: [jira] [Updated] (CASSANDRA-10214) Enable index selection to be
 overridden on a per query basis
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/CASSANDRA-10214?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sam Tunnicliffe updated CASSANDRA-10214:
----------------------------------------
    Fix Version/s:     (was: 3.x)
                   3.0.0 rc2

> Enable index selection to be overridden on a per query basis
> ------------------------------------------------------------
>
>                 Key: CASSANDRA-10214
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10214
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Sam Tunnicliffe
>            Assignee: Sam Tunnicliffe
>             Fix For: 3.0.0 rc2
>
>
> (Broken out of CASSANDRA-10124)
> We could add a {{USING INDEX <indexname>}} clause to {{SELECT}} syntax to force the choice of index and bypass the usual index selection mechanism.
> {code}
> CREATE TABLE ks.t1(k int, v1 int, v2 int, PRIMARY KEY (k));
> CREATE INDEX v1_idx ON ks.t1(v1);
> CREATE INDEX v2_idx ON ks.t1(v2);
> CREATE CUSTOM INDEX v1_v2_idx ON ks.t1(v1, v2) USING 'com.foo.bar.CustomMultiColumnIndex';
> # Override internal index selection mechanism
> SELECT * FROM ks.t1 WHERE v1=0 AND v2=0 USING INDEX v1_idx;
> SELECT * FROM ks.t1 WHERE v1=0 AND v2=0 USING INDEX v2_idx;
> SELECT * FROM ks.t1 WHERE v1=0 AND v2=0 USING INDEX v1_v2_idx;
> {code}
> This is in some ways similar to [index hinting|http://docs.oracle.com/cd/B19306_01/server.102/b14211/hintsref.htm#CHDJDIAH] in Oracle. 
> edit: fixed typo's (missing INDEX in the USING clauses)



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)