X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=doc%2Fman7%2Fnotmuch-search-terms.rst;h=f7a39ceb9df4bc6efb9ae598d70150701374dc48;hp=248444e3cf989684387cd927aab8361ee996beae;hb=fd3c93650d976f630ba0a60341a1a695422e4969;hpb=20ba0b7dfae2111f76d71c8d695265014c2ef7c5

diff --git a/doc/man7/notmuch-search-terms.rst b/doc/man7/notmuch-search-terms.rst
index 248444e3..f7a39ceb 100644
--- a/doc/man7/notmuch-search-terms.rst
+++ b/doc/man7/notmuch-search-terms.rst
@@ -7,7 +7,7 @@ SYNOPSIS
 
 **notmuch** **count** [option ...] <*search-term*> ...
 
-**notmuch** **dump** [--format=(batch-tag|sup)] [--] [--output=<*file*>] [--] [<*search-term*> ...]
+**notmuch** **dump** [--gzip] [--format=(batch-tag|sup)] [--output=<*file*>] [--] [<*search-term*> ...]
 
 **notmuch** **reindex** [option ...] <*search-term*> ...
 
@@ -83,6 +83,22 @@ thread:<thread-id>
     messages). These thread ID values can be seen in the first column
     of output from **notmuch search**
 
+thread:{<notmuch query>}
+    If notmuch is built with **Xapian Field Processors** (see below),
+    threads may be searched for indirectly by providing an arbitrary
+    notmuch query in **{}**. For example, the following returns
+    threads containing a message from mallory and one (not necessarily
+    the same message) with Subject containing the word "crypto".
+
+    ::
+
+       % notmuch search 'thread:"{from:mallory}" and thread:"{subject:crypto}"'
+
+    The performance of such queries can vary wildly. To understand
+    this, the user should think of the query **thread:{<something>}**
+    as expanding to all of the thread IDs which match **<something>**;
+    notmuch then performs a second search using the expanded query.
+
 path:<directory-path> or path:<directory-path>/** or path:/<regex>/
     The **path:** prefix searches for email messages that are in
     particular directories within the mail store. The directory must
@@ -134,7 +150,7 @@ lastmod:<initial-revision>..<final-revision>
     The **lastmod:** prefix can be used to restrict the result by the
     database revision number of when messages were last modified (tags
     were added/removed or filenames changed). This is usually used in
-    conjunction with the **--uuid** argument to **notmuch search** to
+    conjunction with the ``--uuid`` argument to **notmuch search** to
     find messages that have changed since an earlier query.
 
 query:<name>
@@ -277,8 +293,8 @@ Quoting
 -------
 
 Double quotes are also used by the notmuch query parser to protect
-boolean terms or regular expressions containing spaces or other
-special characters, e.g.
+boolean terms, regular expressions, or subqueries containing spaces or
+other special characters, e.g.
 
 ::
 
@@ -288,12 +304,17 @@ special characters, e.g.
 
    folder:"/^.*/(Junk|Spam)$/"
 
+::
+
+   thread:"{from:mallory and date:2009}"
+
 As with phrases, you need to protect the double quotes from the shell
 e.g.
 
 ::
 
    % notmuch search 'folder:"/^.*/(Junk|Spam)$/"'
+   % notmuch search 'thread:"{from:mallory and date:2009}" and thread:{to:mallory}'
 
 DATE AND TIME SEARCH
 ====================
@@ -435,6 +456,7 @@ Currently the following features require field processor support:
 - non-range date queries, e.g. "date:today"
 - named queries e.g. "query:my_special_query"
 - regular expression searches, e.g. "subject:/^\\[SPAM\\]/"
+- thread subqueries, e.g. "thread:{from:bob}"
 
 SEE ALSO
 ========