Introduce a helper ExpressionEvaluator to simplify expression evaluation #5108
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Signed-off-by: leiysky <leiysky@outlook.com>
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Signed-off-by: leiysky <leiysky@outlook.com>
Signed-off-by: leiysky <leiysky@outlook.com>
BohuTANG
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sundy-li
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Apr 29, 2022
zhang2014
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Signed-off-by: leiysky <leiysky@outlook.com>
sundy-li
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BohuTANG
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Signed-off-by: leiysky leiysky@outlook.com
I hereby agree to the terms of the CLA available at: https://databend.rs/dev/policies/cla/
Summary
Introduce a helper
ExpressionEvaluatorwhich evaluates scalar expression in a recursive fashion.Compare to
ExpressionExecutor,ExpressionEvaluatordoesn't rely onDataSchema, and won't produce intermidiate result. It's useful when you want to evaluate an expression on the fly.Changelog
Related Issues
Fixes #5105