wqc200 commented on a change in pull request #9600:
URL: https://github.com/apache/arrow/pull/9600#discussion_r585522814
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File path: rust/datafusion/src/logical_plan/expr.rs
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@@ -160,20 +160,26 @@ pub enum Expr {
},
/// Represents the call of a built-in scalar function with a set of
arguments.
ScalarFunction {
+ /// The input name of the function
+ input_name: String,
Review comment:
This is mainly used to display the name of the function entered by the
user.
md5 (Utf8("a")) instead of mD5(Utf8("a")) if there is no input_name.
For example:
> mysql> select mD5('a');
> +----------------------------------+
> | mD5(Utf8("a")) |
> +----------------------------------+
> | 0cc175b9c0f1b6a831c399e269772661 |
> +----------------------------------+
> 1 row in set (0.01 sec)
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