非分区表对蜂巢的优势？

Question

Are there any advantages of non-partitioned table on Hive -- their special use cases comparing to partitioned table?

It will be great if anyone could help. :)

Answer 1

Let's put it that way: in the database world, partitioning can be used to solve different kinds of problems. As long as you have no explicit problem, don't bother with partitions (ie "if it ain't broken, don't fix it") . Whenever you hit a problem, ask a DB architect to find a solution - may involve partitioning, maybe not.

But Hive is not a typical database. Partitions are everywhere, just because it's a crude workaround for the lack of indexes...

(Well, actually the ORC format has its own workaround [stores min/max values per column per stripe, which allows skipping useless stripes] so partitioning is less critical with that format)