Re: Feature proposal: OUTPUT_AUTHOR format

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+To: Austin Clements <amdragon@MIT.EDU>, \r
+From: Johannes Kulick <johannes@mailless.org>\r
+In-Reply-To: <20130827134723.GQ13257@mit.edu>\r
+References: <20130825101308.27461.57489@quirm.robotics.tu-berlin.de>\r
+       <20130826222226.1093.84929@quirm.robotics.tu-berlin.de>\r
+       <87li3o9dwr.fsf@zancas.localnet>\r
+       <20130827115004.11629.64740@quirm.robotics.tu-berlin.de>\r
+       <20130827134723.GQ13257@mit.edu>\r
+Message-ID: <20130827140654.31336.307@quirm.robotics.tu-berlin.de>\r
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+Subject: Re: Feature proposal: OUTPUT_AUTHOR format\r
+Date: Tue, 27 Aug 2013 16:06:54 +0200\r
+Cc: notmuch@notmuchmail.org\r
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+\r
+> What's the advantage to adding this to the library?  Why not just\r
+> notmuch_query_search_messages, iterate over the messages and use\r
+> notmuch_message_get_header(msg, "from") to accumulate the author\r
+> information, and then output that?  Unless I'm overlooking something\r
+> (which is possible), there are no algorithmic advantages to doing this\r
+> in the library.\r
+\r
+\r
+The view I have in mind would look something like:\r
+\r
+John Doe (1234 msg)\r
+|- first thread subject\r
+|- second thread subject\r
+|- third thread subject\r
+Jane Doe (234 msg)\r
+|- first thread subject\r
+|- second thread subject\r
+|- third thread subject\r
+...\r
+\r
+\r
+The problem is, that if I want to have a list of all authors in the databas=\r
+e I'd\r
+have to iterate over all messages (naively implemented, whenever I render t=\r
+he\r
+view, or I somehow have to persistently store this list and update it on a\r
+regular basis), whereas the notmuch database already has this information b=\r
+ut\r
+doesn't reveal if I'm not overlooking something. To do a\r
+notmuch_query_search_messages I'd have to know what to search for, whereas a\r
+notmuch_database_get_all_authors would give me exactly what I'm looking for=\r
+ in\r
+short time since it is already indexed by xapian.\r
+\r
+Best,\r
+Johannes\r
+\r
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