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  45 Date: Sun, 25 Oct 2015 17:02:15 -0400\r
  46 From: Steven Allen <steven@stebalien.com>\r
  47 To: notmuch@notmuchmail.org\r
  48 Subject: [bug] notmuch doesn't commit changes before an open transaction on\r
  49  close\r
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  80 Notmuch claims to commit changes made before an open transaction on\r
  81 close but actually throws them away (according to the documentation).\r
  82 \r
  83 According to the notmuch documentation,\r
  84 \r
  85 > For writable databases, notmuch_database_close commits all changes\r
  86 > to disk before closing the database.  If the caller is currently in\r
  87 > an atomic section (there was a notmuch_database_begin_atomic\r
  88 > without a matching notmuch_database_end_atomic), this will discard\r
  89 > changes made in that atomic section (but still commit changes made\r
  90 > prior to entering the atomic section).\r
  91 \r
  92 However, this isn't true. Notmuch atomic transactions don't flush on\r
  93 entry so, this comment from the xapian documentation applies:\r
  94 \r
  95 > If you're applying atomic groups of changes and only wish to ensure\r
  96 > that each group is either applied or not applied, then you can prevent\r
  97 > the automatic commit() before and after the transaction by starting\r
  98 > the transaction with begin_transaction(false). However, if\r
  99 > cancel_transaction is called (or if commit_transaction isn't called\r
 100 > before the WritableDatabase object is destroyed) then any changes\r
 101 > which were pending before the transaction began will also be\r
 102 > discarded.\r
 103 \r
 104 source: http://xapian.org/docs/apidoc/html/classXapian_1_1WritableDatabase.=\r
 105 html\r
 106 \r
 107 This means that, in theory at least, xapian could throw away *all*\r
 108 changes to the database if a transaction is open.\r
 109 \r
 110 --=20\r
 111 Steven Allen\r
 112 (310) 433-5865\r
 113 ((Do Not Email <honeypot@stebalien.com>))\r
 114 \r
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