Re: Searching from a folder

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+Date: Mon, 1 Oct 2012 08:16:25 -0400\r
+From: Austin Clements <amdragon@MIT.EDU>\r
+To: Damien Cassou <damien.cassou@gmail.com>\r
+Subject: Re: Searching from a folder\r
+Message-ID: <20121001121625.GD26662@mit.edu>\r
+References:\r
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+Quoth Damien Cassou on Oct 01 at 11:42 am:\r
+> On Sat, Sep 29, 2012 at 6:12 PM, Austin Clements <amdragon@mit.edu> wrote:\r
+> > $ notmuch search 'folder:"[Gmail].All Mail"'\r
+> > $ notmuch search 'folder:"[Gmail].Important"'\r
+> \r
+> thank you very much, it indeed works. I'm still a bit puzzled by the\r
+> fact that, on my other mailbox, I'm getting the following results:\r
+> \r
+> $ notmuch search 'folder:"[Gmail].Important"' | wc --lines\r
+> 8928\r
+> $ notmuch search folder:[Gmail].Important | wc --lines\r
+> 138\r
+> \r
+> So, without using quoting, something is indeed happening. Do you know what?\r
+\r
+In the latter case, you're finding emails that contain the words\r
+"folder" (or words like folder), "gmail", and "important".\r
+\r
+$ NOTMUCH_DEBUG_QUERY=1 notmuch search 'folder:"[Gmail].Important"'\r
+Final query is:\r
+Xapian::Query((Tmail AND (XFOLDERgmail:(pos=1) PHRASE 2 XFOLDERimportant:(pos=2))))\r
+\r
+This is slightly inscrutable, but you can see that it applied the\r
+folder prefix ("XFOLDER") to both "gmail" and "important" and required\r
+that the two terms appear in a phrase (that is, next to each other).\r
+\r
+$ NOTMUCH_DEBUG_QUERY=1 notmuch search 'folder:[Gmail].Important'\r
+Final query is:\r
+Xapian::Query((Tmail AND Zfolder:(pos=1) AND gmail:(pos=2) AND important:(pos=3)))\r
+\r
+Whereas here, it's searching for folder, gmail, and important as\r
+regular and completely independent terms (the Z on folder means it's\r
+stemmed, so it will match folders, foldered, etc.)\r