Ticket #7783: pgnulls.diff

django/db/backends/postgresql_psycopg2/introspection.py

@@ -15 +15 @@
 
 def get_table_description(cursor, table_name):
     "Returns a description of the table, with the DB-API cursor.description interface."
-    cursor.execute("SELECT * FROM %s LIMIT 1" % quote_name(table_name))
-    return cursor.description
+    cursor.execute("SELECT column_name, is_nullable FROM information_schema.columns WHERE table_name = '%s'" % table_name)
+    nullmap = dict(cursor.fetchall())
+    cursor.execute("SELECT * FROM %s WHERE 1=0" % quote_name(table_name))
+    def fixdesc(row,nullmap=nullmap):
+        ret = list(row)
+        ret[6] = nullmap[unicode(ret[0])] == u'YES'
+        return tuple(ret)
+    return map(fixdesc, cursor.description)
 
 def get_relations(cursor, table_name):
     """