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+From: Austin Clements <aclements@csail.mit.edu>\r
+To: notmuch@notmuchmail.org\r
+Subject: [PATCH v3 2/9] lib: Update database schema doc for ghost messages\r
+Date: Thu, 23 Oct 2014 08:30:34 -0400\r
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+\r
+From: Austin Clements <amdragon@mit.edu>\r
+\r
+This describes the structure of ghost mail documents. Ghost messages\r
+are not yet implemented.\r
+---\r
+ lib/database.cc | 20 ++++++++++++++++++--\r
+ 1 file changed, 18 insertions(+), 2 deletions(-)\r
+\r
+diff --git a/lib/database.cc b/lib/database.cc\r
+index 8fd7fad..c641bcd 100644\r
+--- a/lib/database.cc\r
++++ b/lib/database.cc\r
+@@ -50,8 +50,8 @@ typedef struct {\r
+ \r
+ /* Here's the current schema for our database (for NOTMUCH_DATABASE_VERSION):\r
+ *\r
+- * We currently have two different types of documents (mail and\r
+- * directory) and also some metadata.\r
++ * We currently have three different types of documents (mail, ghost,\r
++ * and directory) and also some metadata.\r
+ *\r
+ * Mail document\r
+ * -------------\r
+@@ -109,6 +109,15 @@ typedef struct {\r
+ *\r
+ * The data portion of a mail document is empty.\r
+ *\r
++ * Ghost mail document [if NOTMUCH_FEATURE_GHOSTS]\r
++ * -----------------------------------------------\r
++ * A ghost mail document is like a mail document, but where we don't\r
++ * have the message content. These are used to track thread reference\r
++ * information for messages we haven't received.\r
++ *\r
++ * A ghost mail document has type: ghost; id and thread fields that\r
++ * are identical to the mail document fields; and a MESSAGE_ID value.\r
++ *\r
+ * Directory document\r
+ * ------------------\r
+ * A directory document is used by a client of the notmuch library to\r
+@@ -172,6 +181,13 @@ typedef struct {\r
+ * generated is 1 and the value will be\r
+ * incremented for each thread ID.\r
+ *\r
++ * Obsolete metadata\r
++ * -----------------\r
++ *\r
++ * If ! NOTMUCH_FEATURE_GHOSTS, there are no ghost mail documents.\r
++ * Instead, the database has the following additional database\r
++ * metadata:\r
++ *\r
+ * thread_id_* A pre-allocated thread ID for a particular\r
+ * message. This is actually an arbitrarily large\r
+ * family of metadata name. Any particular name is\r
+-- \r
+2.1.0\r
+\r
projects / notmuch-archives.git / commitdiff