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31 To: notmuch@notmuchmail.org
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32 From: Olly Betts <olly@survex.com>
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33 Date: Fri, 5 Feb 2010 23:48:03 +0000 (UTC)
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35 Message-ID: <slrnhmpbhk.4kj.olly@msgid.survex.com>
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36 References: <87636bws2o.fsf@servo.finestructure.net>
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40 Sender: news <news@ger.gmane.org>
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41 Subject: Re: [notmuch] strange behavior of indexing of and searching for
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42 strings containing '[]'
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57 On 2010-02-05, Jameson Rollins wrote:
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58 > Hey, folks. I've been noticing some strange behavior of notmuch search
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59 > results for strings containing '[]'. Here are some searches for some
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60 > exact strings in messages subjects:
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62 The '[]' is a red herring. Xapian's TermGenerator and QueryParser classes
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63 treat these two characters pretty much as if they were spaces.
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65 > servo:~ 0$ notmuch search subject:'emacs paned UI'
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67 Note that the '' is quoting for the shell only here. So Xapian sees:
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69 subject:emacs paned UI
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71 Assuming you are defaulting to an AND search, that's `emacs in the subject'
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72 AND `paned anywhere in the indexed text' AND `UI anywhere in the indexed text'.
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74 To specify a quoted phrase you want "" anyway (not ''), so the command
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75 matching what I think you intended to search for is:
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77 notmuch search 'subject:"emacs paned UI"'
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79 > servo:~ 0$ notmuch search subject:'[notmuch] emacs paned UI'
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81 notmuch search 'subject:"[notmuch] emacs paned UI"'
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83 Which should return identical results to:
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85 notmuch search 'subject:"notmuch emacs paned UI"'
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87 > thread:5f2cb4b108773a39161b33c86e54f7fd 4 mins. ago [1/1] Jameson Rollins;=
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88 > [notmuch] loss of duplicate messages (inbox)
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91 > Not only did it not turn up the message that *does* match that exact
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92 > string in it's subject line, it actually turns up a completely different
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93 > message that doesn't match the search term at all!
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95 It matches the notmuch in the subject, and presumably emacs, paned, and UI
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98 > [snip the rest - the same explanations apply]
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