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+ <todd@electricoding.com>) id 1YCWRS-001OHm-HT; Sat, 17 Jan 2015 11:41:42\r
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+From: Todd <todd@electricoding.com>\r
+To: David Bremner <david@tethera.net>, notmuch@notmuchmail.org\r
+Subject: Re: [PATCH v3 3/5] Add indexing for the mimetype term\r
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+Date: Sat, 17 Jan 2015 10:41:10 -0600\r
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+\r
+--=-=-=\r
+Content-Type: text/plain\r
+Content-Transfer-Encoding: quoted-printable\r
+\r
+\r
+>>>>> "DB" =3D=3D David Bremner <david@tethera.net> writes:\r
+\r
+ DB> Todd <todd@electricoding.com> writes:\r
+ >> Adds the indexing and removes the broken test flag\r
+ >> ---\r
+ >> lib/database.cc | 1 +\r
+ >> lib/index.cc | 10 ++++++++++\r
+ >> test/T190-multipart.sh | 4 ----\r
+ >> 3 files changed, 11 insertions(+), 4 deletions(-)\r
+ >>\r
+ >> diff --git a/lib/database.cc b/lib/database.cc\r
+ >> index 0d2c417..3974e2e 100644\r
+ >> --- a/lib/database.cc\r
+ >> +++ b/lib/database.cc\r
+ >> @@ -254,6 +254,7 @@ static prefix_t PROBABILISTIC_PREFIX[]=3D {\r
+ >> { "from", "XFROM" },\r
+ >> { "to", "XTO" },\r
+ >> { "attachment", "XATTACHMENT" },\r
+ >> + { "mimetype", "XMIMETYPE"},\r
+ >> { "subject", "XSUBJECT"},\r
+ >> };\r
+\r
+ DB> I think the commit message should articulate why we are indexing th=\r
+is as\r
+ DB> a probabilistic prefix, rather than as a boolean prefix. In particu=\r
+lar,\r
+ DB> this gives people a last chance to complain.\r
+\r
+ DB> The reference I know is http://xapian.org/docs/queryparser.html\r
+\r
+ DB> If I understand correctly (it would be great if you could test this\r
+ DB> Todd) , with a probabilistic prefix,\r
+\r
+ DB> mimetime:pdf\r
+\r
+ DB> will match\r
+\r
+ DB> application/pdf\r
+ DB> image/pdf\r
+ DB> application/x-pdf\r
+ DB> application/x-ext-pdf\r
+\r
+ DB> but not\r
+\r
+ DB> application/x-bzpdf\r
+ DB> application/x-gzpdf\r
+ DB> application/x-xzpdf\r
+\r
+ I just tested, and it does work this way with your examples. I\r
+ *believe* from reading the docs, that xapian is treating the full\r
+ MIME-type queries as phrase searches anyway due to the embedded\r
+ slashes.\r
+\r
+ From http://xapian.org/docs/queryparser.html:\r
+\r
+ A phrase surrounded with double quotes ("") matches documents\r
+ containing that exact phrase. Hyphenated words are also treated\r
+ as phrases, as are cases such as filenames and email addresses\r
+ (e.g. /etc/passwd or president@whitehouse.gov).\r
+\r
+ I think that we'll get good behavior from the types of queries that\r
+ will typically be performed due to this automatic phrasing.\r
+\r
+\r
+\r
+ DB> On the whole, this is probably more beneficial than bad. The downs=\r
+ide\r
+ DB> of probabilistic prefixes/fields is that they are not "anchored", so\r
+ DB> there is no easy way to distinguish\r
+\r
+ DB> application/pdf\r
+\r
+ DB> from\r
+\r
+ DB> pdf\r
+ DB> application/x-pdf\r
+\r
+ DB> I guess in a perfect world this would also be explained in\r
+ DB> notmuch-search-terms(7), but that's pretty much orthogonal to this\r
+ DB> series.\r
+\r
+ If separate messages with application/pdf and application/x-pdf are\r
+ indexed, then:\r
+=20=20=20=20\r
+ mimetype:application/x-pdf finds only the application/x-pdf\r
+ mimetype:application/pdf finds only the application/pdf\r
+ mimetype:pdf finds both of the messages\r
+\r
+ I am fairly sure that this behaviour is a result of the automatic\r
+ phrasing mentioned above.\r
+\r
+ - Todd\r
+=20=20=20=20\r
+ DB> d\r
+\r
+--=-=-=\r
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+--=-=-=--\r
projects / notmuch-archives.git / blobdiff