John,
Thanks for the reply.
After PAL Apriori worked for too long, I checked CPU utilization and table distribution. I often found out CPU utilization is almost 0, and the size and number of records in the Apriori Rules table never change for a long time (> hours).
It looks to me the Aprioir has finished, it just never returns.
By the way, when you say "sometime you can cancel it", can you please let me know how do I cancel a procedure?
Also, if I restart HANA at this point, will I lose existing results in the Aprior Rule table?
Chih