pingcap / pingcap/tidb

Multicolumn index buckets do not add value if they aren't skewed

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#55,173 3 comments 0 reactions 0 assignees View on GitHub
component/statistics sig/planner type/enhancement
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Go
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Description

## Enhancement
Multi-column histogram buckets are mostly used as a TopN replacement - that is, they do not add significant value unless the repeat value demonstrates that the value is skewed.

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