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Special Date/Time Inputs [EXT] To: David Harper , Tom Lane Cc: Bruce Momjian , pgsql-docs@lists.postgresql.org References: <156258047907.1181.11324468080514061996@wrigleys.postgresql.org> <20190709033234.ytbltfn25h5wvdbd@momjian.us> <8B4735A4-7B46-406A-B4F1-CBFA47D5E1BC@sanger.ac.uk> <20190709154825.egarmx2s5jyvft4e@momjian.us> <25367.1562687915@sss.pgh.pa.us> <1DC28BBD-A4B8-4083-AC83-BD5B012FF3B1@sanger.ac.uk> From: "Jonathan S. Katz" Openpgp: preference=signencrypt Autocrypt: addr=jkatz@postgresql.org; keydata= mQINBFtShwABEAC7PNHDUOTYuifpUCk23KqfxdQQkn4nkoxOXRK0+rAj36FiwqGB4TJFuOVZ sDFAEiSlC8Jt4y5Cs7B5tetT8JNd2cs6zp/udMJJDz9d65O9PDpdlMgAmIiTzpLlSdx8FG56 DTksaDv1d8j3cTJPSE4/fWSxqzA7o3Y9UuL7atZPrzfImgpRKs0of7elIHwOa8GucjyhYqcR h60wFBJc2KXqQdDYRTZy43DSnY/0VNc0omiH355fustvpm+m5HjD3w7qZyfN3fpKJpnX1LCF f3MnPHaDGITIYGRCBXvf0UqUtD6OEVWPv2C2gyqWMIpWmZTOgDufltKyIByKBoS9x0PlFkij 04X3KODCngt+N8Ssc9OICc6QSxhjoP48PYPdmiTmkrGuf0LX084wj1xeo1NX7XxZK39F6dTJ DhsIiW0sNS0xMxQHLHG9VLbPjx3SANQBh6BuryPz5ZupW9/TIDmkvprtU/oXfKgtfYm3fxmk EctxbWrEPsFTFPyuMqQu6l+xyQv0s1VLZfjNWaua6H1/gGoIt6kRnn5qMXDVVpijuWkHbv7G ngaQMd258UrrOEHnnjzhQ7jxMWV9D+emxbAtlIxnYvCWlV4IwAQhEHfvudqYaIY3hNWrvQ6H GB2KXoTZYN9g5djm14/5nj1IU5zOcovkjJnKhoo9iStnpFF2cwARAQABtCdKb25hdGhhbiBT LiBLYXR6IDxqa2F0ekBwb3N0Z3Jlc3FsLm9yZz6JAlQEEwEIAD4CGwMFCQeGH4AFCwkIBwIG FQoJCAsCBBYCAwECHgECF4AWIQT6hLaVryv3miBkP/HxBJxynxxlJwUCW1KJJQAKCRDxBJxy nxxlJwjrD/kBgqsW4QpNpTFw7ifRokZV08CCX4huPBJQ91rrv+UEWlEcotFBHVkYyHnpzARl tcZxhJ9CbFxjniH9cOTty5T/O1yolbOHtZSW8Z8aWV6BVEbjMb+BFxSSLm7RnvJdzQbGCZq2 ZZvfVpB6z3EHYph4KDdVKvMFjoLskxmdS1DE0tE3zTxvoQsi24Q+HOS07kUjs6fsu/WICMfz mgO++AWG9Y0CvN0mm4TkujESzyKM9E5irD+leEMIcddl51Aa2c/VMfBXQbRmpHIgUFTmuHQD CnQih+9i3OJAksDg66SP8a7yiXv5mwvyDi1EfTGVKYR2j+pwyjwnC3oIbvDMmB3uTn2JIjnT iZKPVtAcAylXjubFltihQgNyuShdP4W+kBwZizhUFqUVL8Anx+KoytYmJPfMRFLGuK4obXKq a2ZS3k9KB+H+isOx2nFJOsc7V360Zp1DVaNmuiK10TT6QndShSPaqkJqFtCb6r92rZ9sZM/L 3vtCI4Rrl3Pt1MgtENXupS8gZpJnAYS0j5A1PAZ09r6ANoaeMHspF+5J5fOHeEvqphXr36mm a83Vl1t4orPb0+QmmijmlpseDU63M88Aw5p3c4qj7t8Qr2EZ5zrn7/sFn5wOfbs8Nymxafif QCnlV2vg9p0m7vSk/yLJ4PFZvs52FgqAGRCdRn0s2EC99bkCDQRbUocAARAAv8ho/toQ9DG3 j4f9h9n1aRHr2FlviN2Utpy6L8+dfDggO0geilmkGQOolZ2E60gGfye/kUtF9W3NByO4hxDR 9u6qbOXcdqnuA+cc68EfqlWFJrVtYFxt0h4ElWYOYnIezKthriWch/FY70FGrxs3z8UHOHq5 0wBW433eTvZm90WixBiXEt2v1DgW4Vr3ymfO7Aap/IYyPuE4JzgudAuAl0HKPyNEHWHG1dAb jX1RiCw9gknIDWQOF0B4UAaJctWGVcnZ3A2ULwNGMa1P9ZJlBWf1vcj01aiHMU0yQ7JjJiSp vfm9eM0uSLwRdDrJjyl5ZZqVumjdv2SMNQ8GvYRbEMys3GGDSt9zXgfCSUnPnJfYxjzBHRI6 x44Wfsx8S6hWxepOogCJJ/g67Bk9mY8YV4klWIXDJVOL5jnBC09DbsZG81JaE2QxB8Y7W36Z Mroi9XMxg3s805hQAQUvdG/poU8hN8BWdrnTm/+4eQQp7gDY1ePDmGM6bJC+OHOSnFtR/f+7 0zpKJ10cc7cBygGnl1yR3KjhFyAWUFvP4ZGziKCcpMwXZfe9PGuyA/YOubMphxIn3YsK2wrd faKZYX2GMZCZhMMcvx9IpQrxIJgU+VlwXu/O+Lk10VIPcxPJJwmpdI6HzcS8ZgG6IMcC444X XTuLaP8j2mgcMvYak3ScCykAEQEAAYkCPAQYAQgAJhYhBPqEtpWvK/eaIGQ/8fEEnHKfHGUn BQJbUocAAhsMBQkHhh+AAAoJEPEEnHKfHGUnReMP/RA2UhGQj+G4uBshkRLjpRysabdPqgQB dEBk6wYbio88Wg/2/hgY7UzmDDEwX3sZfQDcrI6+vIobI8uqstZID+WgAAa1JLfChMyVQnSy 0zfWMOABXscc5tGuvFRZvJklTissMFjXUwaREEKp4ZikTvJ/62MCjSdtrUhnPLvoTsHTKRKD ichE+b5A54alwsubTijw12O6N22r5IjZiiSZV0u7dsShyKw+7wCSax9fuBoE43NMYf+dnjMK nerAQYUcZWYMnk+EC8RaqYAxv6XZ2tKx1AkGGktwkQIBwrz9IlDSvJ3LWJ2UIIuLRTdngNgg GIL4zzuUa2F56FqskQIuYMaNETk6LYfalBDQ6TVLAcgCPQxp4k4i/PRsZ3lZ2ZhRHRYciOvm kp+I6EfHwllQpYrWs1thluBGqlJSVJgKl0IOFvKLsQ6KKfqzAwh6FxrO5qajp4viNIgtWoFw O5Bp0jgFTbH2OrMWIRfUdUCH1Djbuo65svhNj7FNsQVYzHDI+Nd1I/LOBoPc3UorRMF2M4JV kUR7skOHWUbPTSNUr7qc14NSMY3PKjGeVGAsBVHBPvmRx/Ss2tW/TpJWpxg4pmquFQSXuaYh Yf4FN8Sxy320pcr+FqN8AhZkYJcNY82OTtR5VEKRC/mYcyq61qXIKqngydn79bJjGxHipxyF FmEC Message-ID: <74c7b4d4-5c0c-29a2-89aa-9395a38e0633@postgresql.org> Date: Wed, 10 Jul 2019 13:32:31 -0400 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <1DC28BBD-A4B8-4083-AC83-BD5B012FF3B1@sanger.ac.uk> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="EWNIlW43A2c6hq86mo1ZLlX76C5Dlqbrq" X-Host-Lookup-Failed: Reverse DNS lookup failed for 63.118.15.50 (failed) List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Precedence: bulk This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --EWNIlW43A2c6hq86mo1ZLlX76C5Dlqbrq Content-Type: multipart/mixed; boundary="RrAn04pJZgSvpZ8KdzMXOjCZYS0f2VgTE"; protected-headers="v1" From: "Jonathan S. Katz" To: David Harper , Tom Lane Cc: Bruce Momjian , pgsql-docs@lists.postgresql.org Message-ID: <74c7b4d4-5c0c-29a2-89aa-9395a38e0633@postgresql.org> Subject: Re: Ambiguous language in Table 8.13. Special Date/Time Inputs [EXT] References: <156258047907.1181.11324468080514061996@wrigleys.postgresql.org> <20190709033234.ytbltfn25h5wvdbd@momjian.us> <8B4735A4-7B46-406A-B4F1-CBFA47D5E1BC@sanger.ac.uk> <20190709154825.egarmx2s5jyvft4e@momjian.us> <25367.1562687915@sss.pgh.pa.us> <1DC28BBD-A4B8-4083-AC83-BD5B012FF3B1@sanger.ac.uk> In-Reply-To: <1DC28BBD-A4B8-4083-AC83-BD5B012FF3B1@sanger.ac.uk> --RrAn04pJZgSvpZ8KdzMXOjCZYS0f2VgTE Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 7/10/19 6:13 AM, David Harper wrote: >> I actually agree with your opinion that "midnight" is fine. >> That text has been that way for over fifteen years[1], and >> nobody's complained before that it was ambiguous. >=20 > Conversely, how many users over the past fifteen years have read that t= able, and then felt compelled (as I did) to run a query such as >=20 > select 'today'::timestamp,'yesterday'::timestamp,'tomorrow'::timestam= p; >=20 > on their PostgreSQL cluster to clear the ambiguity for themselves? I've heard of one, but only just recently :) If we were to s/midnight/00:00:00/ we'd probably want to do it everywhere midnight appears. This occurs in a few places in the docs: https://www.postgresql.org/docs/current/functions-formatting.html (SSSS) https://www.postgresql.org/docs/current/protocol-replication.html (XlogData section) and there are some various code comments as well. Count me as a +0 vote, as I've always interpreted it the way Bruce & Tom said upthread, but if we want to change it I can write a patch. Jonathan --RrAn04pJZgSvpZ8KdzMXOjCZYS0f2VgTE-- --EWNIlW43A2c6hq86mo1ZLlX76C5Dlqbrq Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEE+oS2la8r95ogZD/x8QSccp8cZScFAl0mIS8ACgkQ8QSccp8c ZSfTLhAArKhg/zApGyqT24cjsLnIybUsq1L3HH+vuorKhnsKOcm4putV2I2ytvrE YL6IeEYWQVNofcNYCKLzBxXp9EODeAAH+sjX+gRhoChpOf52uPdjmcFSPcPddAEa gyv37Cy1/CnewN2UnbYQcx/QrjgpEXMVX69HDrBip7D7kbz1g3OxibKbpxktHmDO YzPEB3YiJukRQHhtPRLiuoIqUsRd9otw31QTAEzukAhtvjTOjqx9eG0DkwG4kCaN ap/9qn6p0gHzOccEtpcpanLeBS6jsVXTVf5lYaVKMI2DG/ayRs7L3sj86yMUWOzE /dM2WFra6ASlIp97sHSrwxC2wydeavr9Pw5ESuZN7GAd0Pxm9bdTfs/gJOkT48cv HTeBFKh8Eg0/6OrXxU4ISy3Q9YjFjUVRDNWJEYh8Fok92aVIr/q2HRV1LNIDM7S/ wIILdThfVxYGf4GZkrYwxbbf3OvTXiNr+yfOz0AM3Lem5RtwtO4UW83NwCx3sJLC nUyooKS1E8vbAIyhrXY/CIEe4vQUoy3mx1/e49sDACzYK9LrAAWB3vlTBl4K5+BG I51Uz0/qw1DMoMulGr/ba3wantT5fHKbrU6Szt2DxM4NulweAm+iXtVvDwRiIhf9 iXjLg8T52OhdBskE0XHZiXorRK/hVJpBGlQ782O48lgn4qvNoN8= =FtHA -----END PGP SIGNATURE----- --EWNIlW43A2c6hq86mo1ZLlX76C5Dlqbrq--