Columnstore On Temp Objects

Niko Neugebauer looks at creating columnstore indexes on temporary objects to see which ones are allowed and what limitations exist:

There is a very usable support for Columnstore Indexes within the temporary objects, but they are not appearing in any of the DMV’s to be analysed or optimised. This is especially sad in the relation to the global temporary tables which are some of the more useful temporary objects.

For the most part, I’d consider these reasonable results.  Hopefully we can get columnstore stats on temp tables, but even that’s not a huge loss.

Related Posts

Optimized Bitmaps On Columnstore Indexes

Joe Obbish digs into bitmap filters and clustered columnstore indexes: The position of the bitmap has changed so that it’s evaluated after the key lookup. That makes sense because the key lookup returns the column to be filtered against. However, the bitmap filter still reduces the estimated number of key lookups from 3000000 to 3000. […]

Read More

Columnstore Partition Management–Dealing With Non-Empty Partitions

Dmitri Korotkevitch shows a way of dealing with non-empty partitions on columnstore indexes: The common, by the book approach recommends dropping columnstore index, splitting or merging partitions and recreating the index afterwards. As you can imagine, it would lead to extremely inefficient process with huge amount of unnecessary overhead on large tables. After all, you have to […]

Read More

Categories

March 2016
MTWTFSS
« Feb Apr »
 123456
78910111213
14151617181920
21222324252627
28293031