[SQL-CVS] r2008 - SQLObject/docs

[<sub...@co...>]

Author: phd
Date: 2006-10-11 08:43:45 -0600 (Wed, 11 Oct 2006)
New Revision: 2008

Modified:
   SQLObject/docs/SQLObject.txt
Log:
Documentation patche from the bug 1496014: None in enumValues fails.


Modified: SQLObject/docs/SQLObject.txt
===================================================================
--- SQLObject/docs/SQLObject.txt	2006-10-11 14:43:12 UTC (rev 2007)
+++ SQLObject/docs/SQLObject.txt	2006-10-11 14:43:45 UTC (rev 2008)
@@ -1099,6 +1099,13 @@
     ``ENUM`` type, but will work with other databases too (storage
     just won't be as efficient).
 
+    For PostgreSQL, EnumCol's are implemented using check constraints.
+    Due to the way PostgreSQL handles check constraints involving NULL,
+    specifying None as a member of an EnumCol will effectively mean that,
+    at the SQL level, the check constraint will be ignored (see
+    http://archives.postgresql.org/pgsql-sql/2004-12/msg00065.php for
+    more details).
+
 `FloatCol`:
     Floats.