From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Wed, 30 Nov 2011 20:04:33 +0000 (-0500)
Subject: another detail re: sql server here
X-Git-Tag: rel_0_1_0~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a9a5ed1cddb40d39ffe2e43a9a5ce710173b3690;p=thirdparty%2Fsqlalchemy%2Falembic.git

another detail re: sql server here
---

diff --git a/alembic/op.py b/alembic/op.py
index 224003e7..9861db1e 100644
--- a/alembic/op.py
+++ b/alembic/op.py
@@ -160,8 +160,10 @@ def alter_column(table_name, column_name,
     :param existing_type: Optional; a :class:`~sqlalchemy.types.TypeEngine`
      type object to specify the previous type.   This
      is required for all MySQL column alter operations that 
-     don't otherwise specify a new type.  It is also
-     used if the type is a so-called SQLlchemy "schema" type which
+     don't otherwise specify a new type, as well as for
+     when nullability is being changed on a SQL Server
+     column.  It is also used if the type is a so-called 
+     SQLlchemy "schema" type which
      may define a constraint (i.e. 
      :class:`~sqlalchemy.types.Boolean`, :class:`~sqlalchemy.types.Enum`), 
      so that the constraint can be dropped.