[Zope-DB] Re: Test for equality to Missing.Value (empty field)?

Dieter Maurer dieter@handshake.de
Wed, 27 Nov 2002 19:23:40 +0100


M.-A. Lemburg writes:
 > ...
 > Note that the mxODBC Zope DA also maps None returns (which represent
 > NULLs in SQL) to Zope's Missing.MV. The Zope DA has to do this to
 > stay compatible to the other DAs.
Are you sure?

Where did you find that documented?

The DA's I used ("ZpsycopgDA", ZMySQLDA, ZOracleDA")
map SQL Null to "None" and this is good,
as "Missing.MV" is unavailable in TTW code.
This makes it quite not very adequate for the job.


Dieter