Oooh, that's evil.  
Had a consult with the in-house DBA.

This works for me on V7.1.1:

select count(*) from nodes  where node_name not in (select node_name from 
filespaces where node_name is not null)

In V6-7 there is 1 filespace with a NULL node name - looks to me like something 
created by the funky backup of the DB2 DB.

DBA says because the result table created by "select node_name from filespaces" 
has that NULL value in it, DB2 somehow can't do the "not in" match (or not in 
the way it would seem logical to me, anyway).  Seems like a lousy system, but I 
didn't feel like taking the time to dig into the bowels of DB2 doc on exactly 
what "not in" considers.

There's an even more complicated way by adding a "left join" and forcing the 
subordinate select to build the result table that you would expect without a 
NULL in it.  But this is the simplest way.  

Wanda Prather
TSM and Disaster Recovery Consultant
ICF International Enterprise and Cybersecurity Systems Division



-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Schofield, Neil (Storage & Middleware, Backup & Restore)
Sent: Friday, January 09, 2015 10:44 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Changed SQL behavior under server 6.2.3.1

David

Thanks for the suggestion. I would have thought both were equivalent, but I 
tried each of them anyway and both gave the wrong answer:

tsm: XXXXX>select count(*) from nodes where node_name not in (select node_name 
from filespaces)

  Unnamed[1]
------------
           0

tsm: XXXXX>select count(*) from nodes where not node_name in (select node_name 
from filespaces)

  Unnamed[1]
------------
           0

Regards
Neil


> Hi,
> the last query should be select count(*) from nodes where node_name 
> not in (select node_name from filespaces)
>
> NOT keyword between column name and IN keyword.
>
> David RIGAUDIERE


Neil Schofield
Tivoli Storage Manager SME
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