Re: [PATCH v3 6/9] lib: add date range query support
authorMichal Nazarewicz <mina86@mina86.com>
Thu, 13 Sep 2012 11:14:37 +0000 (13:14 +0200)
committerW. Trevor King <wking@tremily.us>
Fri, 7 Nov 2014 17:49:29 +0000 (09:49 -0800)
cc/82927c5683d77cebd7d0871d1313199c2fde28 [new file with mode: 0644]

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+Sender: Michal Nazarewicz <mpn@google.com>\r
+From: Michal Nazarewicz <mina86@mina86.com>\r
+To: Jani Nikula <jani@nikula.org>, notmuch@notmuchmail.org,\r
+       David Bremner <david@tethera.net>\r
+Subject: Re: [PATCH v3 6/9] lib: add date range query support\r
+In-Reply-To:\r
+ <532340d05ea748518c021048900bb83149e04e88.1347484177.git.jani@nikula.org>\r
+Organization: http://mina86.com/\r
+References: <cover.1347484177.git.jani@nikula.org>\r
+       <532340d05ea748518c021048900bb83149e04e88.1347484177.git.jani@nikula.org>\r
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+Date: Thu, 13 Sep 2012 13:14:37 +0200\r
+Message-ID: <xa1tsjamdvj6.fsf@mina86.com>\r
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+--=-=-=\r
+Content-Type: text/plain; charset=utf-8\r
+Content-Transfer-Encoding: quoted-printable\r
+\r
+On Wed, Sep 12 2012, Jani Nikula wrote:\r
+> Add a custom value range processor to enable date and time searches of\r
+> the form date:since..until, where "since" and "until" are expressions\r
+> understood by the previously added date/time parser, to restrict the\r
+> results to messages within a particular time range (based on the Date:\r
+> header).\r
+>\r
+> If "since" or "until" describes date/time at an accuracy of days or\r
+> less, the values are rounded according to the accuracy, towards past\r
+> for "since" and towards future for "until". For example,\r
+> date:november..yesterday would match from the beginning of November\r
+> until the end of yesterday. Expressions such as date:today..today\r
+> means since the beginning of today until the end of today.\r
+\r
+IMO this is totally unintuitive and not how the range should work.\r
+date:foo..bar should return messages whose date >=3D foo and < bar.  So\r
+for instance date:november..yesterday should return messages whose date\r
+is > 2012/11/01 00:00:00 and < 2012/09/12 00:00:00.  So to get\r
+yesterdays messages one would do: date:yesterday..today.\r
+\r
+> Open-ended ranges are supported (since Xapian 1.2.1), i.e. you can\r
+> specify date:..until or date:since.. to not limit the start or end\r
+> date, respectively.\r
+>\r
+> CAVEATS:\r
+>\r
+> Xapian does not support spaces in range expressions. You can replace\r
+> the spaces with '_', or (in most cases) '-', or (in some cases) leave\r
+> the spaces out altogether.\r
+\r
+--=20\r
+Best regards,                                         _     _\r
+.o. | Liege of Serenely Enlightened Majesty of      o' \,=3D./ `o\r
+..o | Computer Science,  Micha=C5=82 =E2=80=9Cmina86=E2=80=9D Nazarewicz   =\r
+ (o o)\r
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