jayzhan211 commented on code in PR #11013:
URL: https://github.com/apache/datafusion/pull/11013#discussion_r1701036038
##########
datafusion/functions-aggregate/src/min_max.rs:
##########
@@ -914,69 +888,56 @@ impl Accumulator for SlidingMaxAccumulator {
}
}
-/// MIN aggregate expression
-#[derive(Debug, Clone)]
+#[derive(Debug)]
pub struct Min {
- name: String,
- data_type: DataType,
- nullable: bool,
- expr: Arc<dyn PhysicalExpr>,
+ signature: Signature,
+ aliases: Vec<String>,
}
impl Min {
- /// Create a new MIN aggregate function
- pub fn new(
- expr: Arc<dyn PhysicalExpr>,
- name: impl Into<String>,
- data_type: DataType,
- ) -> Self {
+ pub fn new() -> Self {
Self {
- name: name.into(),
- expr,
- data_type: min_max_aggregate_data_type(data_type),
- nullable: true,
+ signature: Signature::user_defined(Volatility::Immutable),
+ aliases: vec!["min".to_owned()],
}
}
}
-impl AggregateExpr for Min {
- /// Return a reference to Any that can be used for downcasting
- fn as_any(&self) -> &dyn Any {
+impl Default for Min {
+ fn default() -> Self {
+ Self::new()
+ }
+}
+
+impl AggregateUDFImpl for Min {
+ fn as_any(&self) -> &dyn std::any::Any {
self
}
- fn field(&self) -> Result<Field> {
- Ok(Field::new(
- &self.name,
- self.data_type.clone(),
- self.nullable,
- ))
+ fn name(&self) -> &str {
+ "MIN"
Review Comment:
Follow up PR is to lowercase the name
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