[Zope] "Missing" attribute with ZSQL methods?

[Stephane Bortzmeyer]

If I write DTML that way:

<td><dtml-var telephone missing="(No phone)"></td>

and if "telephone" comes from a ZSQL method, "missing" is ignored even if the 
field was NULL (in SQL sense). Is it normal?

Zope version: Zope 2.2.2 (source release, python 1.5.2, linux2) 
    Python version: 2.0c1 (#2, Nov 24 2000, 11:08:10) [C] 
    System Platform: osf1V4 

PostgreSQL 7.0.3 (with Z PyGreSQL, ZPyGreSQLDA-0-0-3)