Behavior of VARCHAR and COMPRESSed columns in SPOOL - response (1) by dnoeth

#1: false in general, but true when used in GROUP BY/ORDER BY/UNION. Plus the maximum size is considered during FastLoad/MLoad resulting in less row per block sent. For me this is always an indication that you don't care or you don't know about your actual data :-)
#2: false, any Multi Value Compression is carried into spool (unless you do some calculation on it)
 
Dieter