Implementing feedback from code review

edmondop · Aug 1, 2024 · ec95a77 · ec95a77
1 parent c7deaa8
commit ec95a77
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Showing 6 changed files with 106 additions and 187 deletions.
diff --git a/datafusion/expr/src/type_coercion/aggregates.rs b/datafusion/expr/src/type_coercion/aggregates.rs
@@ -20,7 +20,6 @@ use arrow::datatypes::{
     DataType, TimeUnit, DECIMAL128_MAX_PRECISION, DECIMAL128_MAX_SCALE,
     DECIMAL256_MAX_PRECISION, DECIMAL256_MAX_SCALE,
 };
-use std::ops::Deref;
 
 use datafusion_common::{internal_err, plan_err, Result};
 
@@ -142,22 +141,6 @@ pub fn check_arg_count(
     Ok(())
 }
 
-pub fn get_min_max_result_type(input_types: &[DataType]) -> Result<Vec<DataType>> {
-    // make sure that the input types only has one element.
-    assert_eq!(input_types.len(), 1);
-    // min and max support the dictionary data type
-    // unpack the dictionary to get the value
-    match &input_types[0] {
-        DataType::Dictionary(_, dict_value_type) => {
-            // TODO add checker, if the value type is complex data type
-            Ok(vec![dict_value_type.deref().clone()])
-        }
-        // TODO add checker for datatype which min and max supported
-        // For example, the `Struct` and `Map` type are not supported in the MIN and MAX function
-        _ => Ok(input_types.to_vec()),
-    }
-}
-
 /// function return type of a sum
 pub fn sum_return_type(arg_type: &DataType) -> Result<DataType> {
     match arg_type {
@@ -327,14 +310,6 @@ pub fn coerce_avg_type(func_name: &str, arg_types: &[DataType]) -> Result<Vec<Da
 #[cfg(test)]
 mod tests {
     use super::*;
-    #[test]
-    fn test_get_min_max_return_type_coerce_dictionary() -> Result<()> {
-        let data_type =
-            DataType::Dictionary(Box::new(DataType::Utf8), Box::new(DataType::Int32));
-        let result = get_min_max_result_type(&[data_type])?;
-        assert_eq!(result, vec![DataType::Int32]);
-        Ok(())
-    }
 
     #[test]
     fn test_variance_return_data_type() -> Result<()> {

diff --git a/datafusion/functions-aggregate/src/lib.rs b/datafusion/functions-aggregate/src/lib.rs
@@ -112,9 +112,7 @@ pub mod expr_fn {
     pub use super::grouping::grouping;
     pub use super::median::median;
     pub use super::min_max::max;
-    pub use super::min_max::max_distinct;
     pub use super::min_max::min;
-    pub use super::min_max::min_distinct;
     pub use super::regr::regr_avgx;
     pub use super::regr::regr_avgy;
     pub use super::regr::regr_count;