Refs #29850 -- Added exclusion support to window frames.

2 files changed, 37 insertions, 2 deletions

diff --git a/docs/ref/models/expressions.txt b/docs/ref/models/expressions.txt
index 6dfe6c453a..807a946551 100644
--- a/docs/ref/models/expressions.txt
+++ b/docs/ref/models/expressions.txt
@@ -889,7 +889,7 @@ Frames
 For a window frame, you can choose either a range-based sequence of rows or an
 ordinary sequence of rows.
 
-.. class:: ValueRange(start=None, end=None)
+.. class:: ValueRange(start=None, end=None, exclusion=None)
 
     .. attribute:: frame_type
 
@@ -899,18 +899,48 @@ ordinary sequence of rows.
     the standard start and end points, such as ``CURRENT ROW`` and ``UNBOUNDED
     FOLLOWING``.
 
-.. class:: RowRange(start=None, end=None)
+    .. versionchanged:: 5.1
+
+        The ``exclusion`` argument was added.
+
+.. class:: RowRange(start=None, end=None, exclusion=None)
 
     .. attribute:: frame_type
 
         This attribute is set to ``'ROWS'``.
 
+    .. versionchanged:: 5.1
+
+        The ``exclusion`` argument was added.
+
 Both classes return SQL with the template:
 
 .. code-block:: sql
 
     %(frame_type)s BETWEEN %(start)s AND %(end)s
 
+.. class:: WindowFrameExclusion
+
+    .. versionadded:: 5.1
+
+    .. attribute:: CURRENT_ROW
+
+    .. attribute:: GROUP
+
+    .. attribute:: TIES
+
+    .. attribute:: NO_OTHERS
+
+The ``exclusion`` argument allows excluding rows
+(:attr:`~WindowFrameExclusion.CURRENT_ROW`), groups
+(:attr:`~WindowFrameExclusion.GROUP`), and ties
+(:attr:`~WindowFrameExclusion.TIES`) from the window frames on supported
+databases:
+
+.. code-block:: sql
+
+    %(frame_type)s BETWEEN %(start)s AND %(end)s EXCLUDE %(exclusion)s
+
 Frames narrow the rows that are used for computing the result. They shift from
 some start point to some specified end point. Frames can be used with and
 without partitions, but it's often a good idea to specify an ordering of the
diff --git a/docs/releases/5.1.txt b/docs/releases/5.1.txt
index 42fb17d003..73343b7499 100644
--- a/docs/releases/5.1.txt
+++ b/docs/releases/5.1.txt
@@ -174,6 +174,11 @@ Models
 * :class:`~django.db.models.expressions.RowRange` now accepts positive integers
   for the ``start`` argument and negative integers for the ``end`` argument.
 
+* The new ``exclusion`` argument of
+  :class:`~django.db.models.expressions.RowRange` and
+  :class:`~django.db.models.expressions.ValueRange` allows excluding rows,
+  groups, and ties from the window frames.
+
 Requests and Responses
 ~~~~~~~~~~~~~~~~~~~~~~