pingcap/tidb

Support not null ScalarFunction.

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#9965 aperta il 31 mar 2019

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Descrizione

Feature Request

Describe the feature you'd like:

Currently, TiDB Don't have not null ScalarFunction, the implementation of not null is not (is null).

Separate implementation of not null must be better than the composed of two 2 ScalarFunction.

Next step: implement not null in TiKV coprocessor and push down.

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