7e86c1beab
Function round support two format round(double) and round(double, int), the argument is variadic. But FunctionBinaryArithmetic not support variadic argument now, make get_function for round(double, int) failed. reproduce steps: 1. set enable_vectorized_engine=true; 2. try to call round(double, int); ``` > select round(10.12345,2); ERROR 1105 (HY000): errCode = 2, detailMessage = Function round is not implemented ```