Return-Path: 
 <hive-dev-return-1305-apmail-hadoop-hive-dev-archive=hadoop.apache.org@hadoop.apache.org>
Delivered-To: apmail-hadoop-hive-dev-archive@locus.apache.org
Received: (qmail 1193 invoked from network); 7 Jan 2009 13:49:08 -0000
Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2)
  by minotaur.apache.org with SMTP; 7 Jan 2009 13:49:08 -0000
Received: (qmail 80741 invoked by uid 500); 7 Jan 2009 13:49:08 -0000
Delivered-To: apmail-hadoop-hive-dev-archive@hadoop.apache.org
Received: (qmail 80717 invoked by uid 500); 7 Jan 2009 13:49:08 -0000
Mailing-List: contact hive-dev-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
List-Help: <mailto:hive-dev-help@hadoop.apache.org>
List-Unsubscribe: <mailto:hive-dev-unsubscribe@hadoop.apache.org>
List-Post: <mailto:hive-dev@hadoop.apache.org>
List-Id: <hive-dev.hadoop.apache.org>
Reply-To: hive-dev@hadoop.apache.org
Delivered-To: mailing list hive-dev@hadoop.apache.org
Received: (qmail 80706 invoked by uid 99); 7 Jan 2009 13:49:08 -0000
Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136)
    by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 07 Jan 2009 05:49:08 -0800
X-ASF-Spam-Status: No, hits=-2000.0 required=10.0
	tests=ALL_TRUSTED
X-Spam-Check-By: apache.org
Received: from [140.211.11.140] (HELO brutus.apache.org) (140.211.11.140)
    by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 07 Jan 2009 13:49:07 +0000
Received: from brutus (localhost [127.0.0.1])
	by brutus.apache.org (Postfix) with ESMTP id 9CBA1234C4AF
	for <hive-dev@hadoop.apache.org>; Wed,  7 Jan 2009 05:48:47 -0800 (PST)
Message-ID: <947344664.1231336127641.JavaMail.jira@brutus>
Date: Wed, 7 Jan 2009 05:48:47 -0800 (PST)
From: "Ashish Thusoo (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Subject: [jira] Updated: (HIVE-179) SUBSTR function should work like other
 databases
In-Reply-To: <152149140.1229386184240.JavaMail.jira@brutus>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-Virus-Checked: Checked by ClamAV on apache.org


     [ https://issues.apache.org/jira/browse/HIVE-179?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ashish Thusoo updated HIVE-179:
-------------------------------

    Priority: Critical  (was: Major)

> SUBSTR function should work like other databases
> ------------------------------------------------
>
>                 Key: HIVE-179
>                 URL: https://issues.apache.org/jira/browse/HIVE-179
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: David Phillips
>            Assignee: David Phillips
>            Priority: Critical
>
> Positions start at 1, not 0.  Negative positions start at the end of the string and count backwards.
> Oracle returns null for lengths less than 1 or non-existent substrings (any empty strings are null).  MySQL and PostgreSQL return empty strings, never null.  PostgreSQL errors for negative lengths.  I suggest we follow the MySQL behavior.
> Oracle treats position 0 the same as 1.  Perhaps we should too?
> {noformat}
>  SUBSTR('ABCDEFG',3,4): CDEF
> SUBSTR('ABCDEFG',-5,4): CDEF
>    SUBSTR('ABCDEFG',3): CDEFG
>   SUBSTR('ABCDEFG',-5): CDEFG
>      SUBSTR('ABC',1,1): A
> MySQL:
>      SUBSTR('ABC',0,1): <empty>
>      SUBSTR('ABC',0,2): <empty>
>      SUBSTR('ABC',1,0): <empty>
>     SUBSTR('ABC',1,-1): <empty>
> Oracle:
>      SUBSTR('ABC',0,1): A
>      SUBSTR('ABC',0,2): AB
>      SUBSTR('ABC',1,0): <null>
>     SUBSTR('ABC',1,-1): <null>
> {noformat}

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.