Exclude NULL-Values Directly From ADSI-SELECT

Hi all,



is it possible to exclude empty records from an ADSI QuerySelect?



I got a query like




Code SnippetSELECT objectGUID FROM OpenQuery(ADSI, 'SELECT objectGUID FROM ''LDAP://DC=whatever,DC=domain,DC=org'' where objectClass = ''User'' AND objectCategory = ''Person''')



and would like to have it like




Code Snippet

SELECT objectGUID FROM OpenQuery(ADSI, 'SELECT objectGUID FROM ''LDAP://DC=whatever,DC=domain,DC=org'' where objectClass = ''User'' AND objectCategory = ''Person'' AND homeDirectory IS NOT NULL')

or


Code SnippetSELECT objectGUID FROM OpenQuery(ADSI, 'SELECT objectGUID FROM ''LDAP://DC=whatever,DC=domain,DC=org'' where objectClass = ''User'' AND objectCategory = ''Person'' AND NOT(homeDirectory = NULL) ')



The problem is that I can only perform a query like




Code SnippetSELECT objectGUID FROM OpenQuery(ADSI, 'SELECT objectGUID FROM ''LDAP://DC=whatever,DC=domain,DC=org'' where objectClass = ''User'' AND objectCategory = ''Person'' AND NOT(homeDirectory = '''')')



which results in the error

"Could not fetch a row from OLE DB provider 'ADSDSOObject'."



There are many objects which do have a homedirectory, though, and therefore should be fetched.



Any comments or hints on where my error hides?



I know I could go on fetching all objects and exclude the unwanted ones later on but I'd simply run into the limitation of data records LDAP would provide me with.

Thanks in advance!



Regards,

caracol