Fixed in ZENWorks Asset Management Interim Release 16 or newer.
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Each interim release is cumulative. If Interim Release 16 is not available due to a newer interim release being placed on the website, be assured that the code needed is in the later release.
indicates that this where clause:
where not ( MyString = '' or Mystring is null )
will never return any rows.
Here is an example.
This returns rows, proving that ( middlename = '' or middlename is null ) ==
TRUE for some rows:
select * from nc_user where ( middlename = '' or middlename is null );
That is because, as the truth table shows, (UNKNOWN or TRUE) == TRUE.
(middlename = 'anything' evaluates to UNKNOWN when middlename is null).
And this returns rows, proving that ( middlename is null ) is TRUE for some
select * from nc_user where ( middlename is null );
Finally, this never returns any rows, because (UNKNOWN or FALSE) == UNKNOWN,
and (NOT UNKNOWN) == UNKNOWN:
select * from nc_user where not ( middlename = '' or middlename is null );