pingcap/tidb

Use a new struct to store the props generated by `preparePossibleProperties`

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#10.749 aperta il 10 giu 2019

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help wantedsig/plannertype/performance

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after https://github.com/pingcap/tidb/pull/10548 There'll be multiple props which share the same suffix. We can implement a struct which can store the eqPrefixLen to cut off the possible props then reduce the search space.

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