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[1.0.X] Fixed #10438 -- Fixed MySQL backend behaviour for UPDATE beha…


We need to know the number of rows that are matched by an UPDATE query,
not just the number of rows that are changed. In the relatively unlikely
event that somebody was using Django's cursor proxy and relying on the
previous behaviour, well, that isn't the case any longer. We need to
this version.

Thanks to Daniel Tang for pointing out the solution here.

Backport of r10532 from trunk.

git-svn-id: bcc190cf-cafb-0310-a4f2-bffc1f526a37
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1 parent 4915d1d commit 6d5f811cdb97610a6886cb6afc1be0f1f5224ea7 @malcolmt malcolmt committed Apr 12, 2009
Showing with 4 additions and 1 deletion.
  1. +4 −1 django/db/backends/mysql/
@@ -22,7 +22,7 @@
raise ImproperlyConfigured("MySQLdb-1.2.1p2 or newer is required; you have %s" % Database.__version__)
from MySQLdb.converters import conversions
-from MySQLdb.constants import FIELD_TYPE, FLAG
+from MySQLdb.constants import FIELD_TYPE, FLAG, CLIENT
from django.db.backends import *
from django.db.backends.mysql.client import DatabaseClient
@@ -258,6 +258,9 @@ def _cursor(self, settings):
kwargs['host'] = settings.DATABASE_HOST
if settings.DATABASE_PORT:
kwargs['port'] = int(settings.DATABASE_PORT)
+ # We need the number of potentially affected rows after an
+ # "UPDATE", not the number of changed rows.
+ kwargs['client_flag'] = CLIENT.FOUND_ROWS
self.connection = Database.connect(**kwargs)
self.connection.encoders[SafeUnicode] = self.connection.encoders[unicode]

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