pingcap/tidb

enhance `explain analyze` to show more runtime statistics about each operator

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#8.213 geöffnet am 7. Nov. 2018

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help wantedsig/executiontype/enhancement

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Beschreibung

With this enhancement, we can identify:

  • the true selectivity for each operator
  • how long it takes to gain the first output record for each operator.

With the help of this kind of information, we can know whether the execution plan is wrong, and how the incorrect or inefficient plan was generated.

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