Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1YL2mp-0003uy-6z for pgsql-admin@arkaria.postgresql.org; Tue, 10 Feb 2015 04:50:59 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.80) (envelope-from ) id 1YL2mn-0006XG-Nl for pgsql-admin@arkaria.postgresql.org; Tue, 10 Feb 2015 04:50:57 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1YL2mm-0006X7-Ku for pgsql-admin@postgresql.org; Tue, 10 Feb 2015 04:50:56 +0000 Received: from mailout.easymail.ca ([64.68.201.169]) by magus.postgresql.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.80) (envelope-from ) id 1YL2me-0004Ed-6X for pgsql-admin@postgresql.org; Tue, 10 Feb 2015 04:50:55 +0000 Received: from localhost (localhost [127.0.0.1]) by mailout.easymail.ca (Postfix) with ESMTP id 8CFA1E234; Mon, 9 Feb 2015 23:50:44 -0500 (EST) X-Virus-Scanned: Debian amavisd-new at mailout.easymail.ca X-Spam-Flag: NO X-Spam-Score: -3.986 X-Spam-Level: X-Spam-Status: No, score=-3.986 required=5 tests=[ALL_TRUSTED=-1.8, AWL=-0.279, BAYES_00=-2.599, DNS_FROM_AHBL_RHSBL=0.692] Received: from mailout.easymail.ca ([127.0.0.1]) by localhost (easymail-mailout.easydns.vpn [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3tqWq4RyDU5d; Mon, 9 Feb 2015 23:50:43 -0500 (EST) Received: from [192.168.2.16] (unknown [8.39.228.5]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mailout.easymail.ca (Postfix) with ESMTPSA id A78F1E235; Mon, 9 Feb 2015 23:50:43 -0500 (EST) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2070.6\)) Subject: Re: [PERFORM] Vs NULL From: Scott Ribe In-Reply-To: Date: Mon, 9 Feb 2015 21:50:42 -0700 Cc: pgsql-admin Content-Transfer-Encoding: quoted-printable Message-Id: <7903E12E-1791-45C6-80F4-D7907D3B1B08@elevated-dev.com> References: To: sridhar bamandlapally X-Mailer: Apple Mail (2.2070.6) X-Pg-Spam-Score: -2.6 (--) List-Archive: List-Help: List-ID: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: X-Mailing-List: pgsql-admin Precedence: bulk Sender: pgsql-admin-owner@postgresql.org On Feb 9, 2015, at 8:53 PM, sridhar bamandlapally w= rote: >=20 > the issue is, while DML its empty string and while SELECT its comparing w= ith NULL The issue is, empty string is NOT the same as null, and expecting select fo= r null to match empty strings is a bug, which you need to fix. --=20 Scott Ribe scott_ribe@elevated-dev.com http://www.elevated-dev.com/ (303) 722-0567 voice --=20 Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin