pingcap/tidb

Investigate and propose Adaptive Join

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#14.408 aperta il 9 gen 2020

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help wantedsig/executionsig/plannertype/enhancement

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Descrizione

Feature Request

Is your feature request related to a problem? Please describe:

Sometimes optimizer need defer the choise of Hash Join or Index Nested loops Join because it does not have a deterministic statistics.

Describe the feature you'd like:

We need someone who is familiar with planner and executor to drive and propose a plan, and see how we can be benefited with Adaptive Join.

Describe alternatives you've considered:

Teachability, Documentation, Adoption, Migration Strategy:

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