Columnstore Pagination

Aaron Bertrand investigates whether columnstore indexes help with pulling out specific “pages” of data:

Since then, I’ve wondered if ColumnStore indexes (both clustered and non-clustered) might help any of these scenarios. TL;DR: Based on this experiment in isolation, the answer to the title of this post is a resounding NO. If you don’t want to see the test setup, code, execution plans, or graphs, feel free to skip to my summary, keeping in mind that my analysis is based on a very specific use case.

I actually would have been surprised to find the answer here to be “yes.”  Columnstore is designed with aggregation in mind, rather than pulling out a fairly small subset of the data.

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Linked Servers And Columnstore

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Columnstore Segment Elimination Pains

Niko Neugebauer shows us two pain points with row group (segment) elimination on clustered columnstore indexes: Still this gives us processing of just 1 Segment with 253 lob logical reads vs 6 Segments and 2669 lob logical reads in the original query. But wait, that’s not all! It can get significantly worse! Let’s use the […]

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