liukun4515 commented on a change in pull request #1539:
URL: https://github.com/apache/arrow-datafusion/pull/1539#discussion_r781692143
##########
File path: datafusion/src/physical_plan/coercion_rule/aggregate_rule.rs
##########
@@ -36,24 +39,9 @@ pub(crate) fn coerce_types(
input_types: &[DataType],
signature: &Signature,
) -> Result<Vec<DataType>> {
- match signature.type_signature {
- TypeSignature::Uniform(agg_count, _) | TypeSignature::Any(agg_count)
=> {
- if input_types.len() != agg_count {
- return Err(DataFusionError::Plan(format!(
- "The function {:?} expects {:?} arguments, but {:?} were
provided",
- agg_fun,
- agg_count,
- input_types.len()
- )));
- }
- }
- _ => {
- return Err(DataFusionError::Internal(format!(
- "Aggregate functions do not support this {:?}",
- signature
- )));
- }
- };
+ // Validate input_types matches (at least one of) the func signature.
+ check_arg_count(agg_fun, input_types, &signature.type_signature)?;
Review comment:
good.
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