alamb commented on code in PR #14695:
URL: https://github.com/apache/datafusion/pull/14695#discussion_r1957309589
##########
datafusion/expr/src/udaf.rs:
##########
@@ -382,6 +390,45 @@ pub trait AggregateUDFImpl: Debug + Send + Sync {
/// Returns this function's name
fn name(&self) -> &str;
+ /// Returns the name of the column this expression would create
+ ///
+ /// See [`Expr::schema_name`] for details
Review Comment:
It would be nice if this documentation included an example of the output too
##########
datafusion/expr/src/expr.rs:
##########
@@ -2264,35 +2279,15 @@ impl Display for SchemaDisplay<'_> {
| Expr::Placeholder(_)
| Expr::Wildcard { .. } => write!(f, "{}", self.0),
- Expr::AggregateFunction(AggregateFunction {
- func,
- args,
- distinct,
- filter,
- order_by,
- null_treatment,
- }) => {
- write!(
- f,
- "{}({}{})",
- func.name(),
- if *distinct { "DISTINCT " } else { "" },
- schema_name_from_exprs_comma_separated_without_space(args)?
- )?;
-
- if let Some(null_treatment) = null_treatment {
- write!(f, " {}", null_treatment)?;
+ Expr::AggregateFunction(AggregateFunction { func, params }) => {
+ match func.schema_name(params) {
Review Comment:
👍
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