Tatsuo Ishii <ishii@sraoss.co.jp> writes:
> BTW, running long benchmark using pgbench on BIG tables easily causes
> an integer overflow error in following SQLs:
Right.
> I'm inclined to change abalance, tbalance and bbalance column to
> BIGINT to avoid the error. Opinion?
No. The problem is that the deltas are invariably positive, which is
not realistic (at least *my* bank balance isn't uniformly increasing :-().
I think the correct fix is just to tweak the range of the randomly
distributed deltas to be plus and minus not always plus.
If you change to bigint then post-change results won't be strictly
comparable to pre-change results because of the difference in execution
costs.
regards, tom lane