Dandandan commented on code in PR #5408:
URL: https://github.com/apache/arrow-datafusion/pull/5408#discussion_r1119828308
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datafusion/physical-expr/src/aggregate/count_distinct.rs:
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@@ -41,7 +41,7 @@ pub struct DistinctCount {
/// The DataType for the final count
data_type: DataType,
/// The DataType used to hold the state for each input
- state_data_types: Vec<DataType>,
+ state_data_types: DataType,
/// The input arguments
exprs: Vec<Arc<dyn PhysicalExpr>>,
Review Comment:
Yeah, as well.
If you like to do some more refactoring, you could remove `data_type:
DataType` from the `DistinctCount` struct as well and just keep a `int64` in
the `DistinctCountAccumulator` instead of using a scalar value.
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