help wanted
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- (Merge moyen 14j 4h) (346 PRs mergées en 30 j)
Description
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.