Received: from localhost (unknown [200.46.208.211]) by mail.postgresql.org (Postfix) with ESMTP id 2924B6346B2 for ; Tue, 30 Jun 2009 23:17:57 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by localhost (mx1.hub.org [200.46.208.211]) (amavisd-maia, port 10024) with ESMTP id 64219-02 for ; Tue, 30 Jun 2009 23:17:41 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by mail.postgresql.org (Postfix) with ESMTP id 2ADBE633A58 for ; Tue, 30 Jun 2009 23:17:50 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.14.2/8.14.2) with ESMTP id n612HfaT001146; Tue, 30 Jun 2009 22:17:41 -0400 (EDT) To: "Tena Sakai" cc: "Edward W. Rouse" , pgsql-sql@postgresql.org Subject: Re: it's not NULL, then what is it? In-reply-to: References: <0ab801c9f9d1$376ad880$a6408980$@com> Comments: In-reply-to "Tena Sakai" message dated "Tue, 30 Jun 2009 17:56:36 -0700" Date: Tue, 30 Jun 2009 22:17:41 -0400 Message-ID: <1145.1246414661@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=0.087 tagged_above=0 required=5 tests=AWL=0.087 X-Spam-Level: X-Archive-Number: 200906/136 X-Sequence-Number: 32741 "Tena Sakai" writes: >>> My confusion is that if they are real and not null, >>> what are they? Good question. So far as I can see these must be some value that sprintf() is printing as spaces; but not NaN and not Infinity because float4out checks for those first. I would argue that this must be a bug in sprintf. What platform are you running on exactly? And for that matter, what PG version is this? regards, tom lane