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If a value of None is placed in column Bar of table foo, the SQL
expression
SELECT * FROM foo WHERE foo.Bar={[None]}
will fail to find any rows. This appears to be a consequence of the
fact that in SQL, [NULL=NULL] is false, and the implementation detail
that None is represented with NULL in databases. A workaround is to
use [IS NULL] instead, but it seems to me that this should be fixed in
Ur/Web.
- --
Istvan Chung
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