[1.0.X] Fixed #9862 -- For better SQL portability, don't specify "NUL…

…L" on nullable columns when creating tables. Patch from Ian Kelly.

Columns are NULL by default, so we only need to use "NOT NULL" when we want
non-default behaviour.

Backport of r9703 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@9704 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/creation.py

@@ -47,7 +47,8 @@ def sql_create_model(self, model, style, known_models=set()):
             # Make the definition (e.g. 'foo VARCHAR(30)') for this field.
             field_output = [style.SQL_FIELD(qn(f.column)),
                 style.SQL_COLTYPE(col_type)]
-            field_output.append(style.SQL_KEYWORD('%sNULL' % (not f.null and 'NOT ' or '')))
+            if not f.null:
+                field_output.append(style.SQL_KEYWORD('NOT NULL'))
             if f.primary_key:
                 field_output.append(style.SQL_KEYWORD('PRIMARY KEY'))
             elif f.unique:
@@ -65,8 +66,7 @@ def sql_create_model(self, model, style, known_models=set()):
             table_output.append(' '.join(field_output))
         if opts.order_with_respect_to:
             table_output.append(style.SQL_FIELD(qn('_order')) + ' ' + \
-                style.SQL_COLTYPE(models.IntegerField().db_type()) + ' ' + \
-                style.SQL_KEYWORD('NULL'))
+                style.SQL_COLTYPE(models.IntegerField().db_type()))
         for field_constraints in opts.unique_together:
             table_output.append(style.SQL_KEYWORD('UNIQUE') + ' (%s)' % \
                 ", ".join([style.SQL_FIELD(qn(opts.get_field(f).column)) for f in field_constraints]))