[bug] Incorrect NULL argument handling in functions #215

zhouqingqing / qpmodel

A Relational Optimizer and Executor

MIT License

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[bug] Incorrect NULL argument handling in functions #215 #218

Closed zhouruiapple closed 3 years ago

zhouruiapple commented 3 years ago

The function expression is converted to a constant expression by normalizer when the parameter is null. Do not need to check whether the parameter is the string type or not.