Database toolbox query not returning all records

I have a fairly simply SQL query that I am running using the database toolbox connecting to a DB2 datasource. For some reason my query returns different results (usually partial results) each time I run it. It never seems to time out or have any errors. When the query runs properly I get 400,000+ records. As I run the query testing the result, often times I will get 2000-5000 records or so. Seemingly no pattern to the random return of different results. Also, I tried setting the timeout of the SQL query to 100 seconds and that didn't seem to have any impact.

conn = database('Database','UN','pwd');
e = exec(conn,'SELECT ALL END_DT,NASDAQ_SYMBOL,LIPPER_CLASS FROM LIPPER.LIPPER_WEEKLY WHERE END_DT > ''2008-12-31''  AND LIPPER_CLASS IN (''MLCE'',''MTAG'',''MTAM'',''MTAC'')  AND NASDAQ_SYMBOL <> ''''  AND UNIVERSE = ''EQ''  ',100);
e = fetch(e);

I'm fairly puzzled here, any help would be appreciated.

Thanks, Brian

[Sean de Wolski]

If you run the exact same query three times in a row, do you get different results each time?

[Sean de Wolski]

i.e.:

e1 = fetch(blah);
e2 = fetch(blah);
e3 = fetch(blah);
isequal(e1,e2,e3)

[Brian]

Yes I do, it seems almost completely random. One time I'll get 400000+ records, one time I'll get 5500 and the third time I'll get No Data.