rm convert_first_level_array_to_scalar_vec

Signed-off-by: jayzhan211 <jayzhan211@gmail.com>

Author: jayzhan211

datafusion/common/src/scalar/mod.rs

@@ -52,7 +52,6 @@ use arrow::{
         UInt16Type, UInt32Type, UInt64Type, UInt8Type, DECIMAL128_MAX_PRECISION,
     },
 };
-use arrow_array::cast::as_list_array;
 use arrow_array::{ArrowNativeTypeOp, Scalar};
 
 pub use struct_builder::ScalarStructBuilder;
@@ -2143,73 +2142,37 @@ impl ScalarValue {
     /// use datafusion_common::ScalarValue;
     /// use arrow::array::ListArray;
     /// use arrow::datatypes::{DataType, Int32Type};
+    /// use datafusion_common::utils::array_into_list_array;
+    /// use std::sync::Arc;
     ///
     /// let list_arr = ListArray::from_iter_primitive::<Int32Type, _, _>(vec![
     ///    Some(vec![Some(1), Some(2), Some(3)]),
-    ///    None,
     ///    Some(vec![Some(4), Some(5)])
     /// ]);
     ///
     /// let scalar_vec = ScalarValue::convert_array_to_scalar_vec(&list_arr).unwrap();
     ///
     /// let expected = vec![
-    ///   vec![
+    /// vec![
     ///     ScalarValue::Int32(Some(1)),
     ///     ScalarValue::Int32(Some(2)),
     ///     ScalarValue::Int32(Some(3)),
-    ///   ],
-    ///   vec![],
-    ///   vec![ScalarValue::Int32(Some(4)), ScalarValue::Int32(Some(5))]
+    /// ],
+    /// vec![
+    ///    ScalarValue::Int32(Some(4)),
+    ///    ScalarValue::Int32(Some(5)),
+    /// ],
     /// ];
     ///
     /// assert_eq!(scalar_vec, expected);
-    /// ```
-    pub fn convert_array_to_scalar_vec(array: &dyn Array) -> Result<Vec<Vec<Self>>> {
-        let mut scalars = Vec::with_capacity(array.len());
-
-        for index in 0..array.len() {
-            let scalar_values = match array.data_type() {
-                DataType::List(_) => {
-                    let list_array = as_list_array(array);
-                    match list_array.is_null(index) {
-                        true => Vec::new(),
-                        false => {
-                            let nested_array = list_array.value(index);
-                            ScalarValue::convert_array_to_scalar_vec(&nested_array)?
-                                .into_iter()
-                                .flatten()
-                                .collect()
-                        }
-                    }
-                }
-                _ => {
-                    let scalar = ScalarValue::try_from_array(array, index)?;
-                    vec![scalar]
-                }
-            };
-            scalars.push(scalar_values);
-        }
-        Ok(scalars)
-    }
-
-    /// convert_array_to_scalar_vec but only convert the first level instead of recursively converting
-    /// all the levels, so list remains as ScalarValue::List
-    ///
-    /// Example
-    /// ```
-    /// use datafusion_common::ScalarValue;
-    /// use arrow::array::ListArray;
-    /// use arrow::datatypes::{DataType, Int32Type};
-    /// use datafusion_common::utils::array_into_list_array;
-    /// use std::sync::Arc;
     ///
     /// let list_arr = ListArray::from_iter_primitive::<Int32Type, _, _>(vec![
     ///    Some(vec![Some(1), Some(2), Some(3)]),
     ///    Some(vec![Some(4), Some(5)])
     /// ]);
     /// let list_arr = array_into_list_array(Arc::new(list_arr));
     ///
-    /// let scalar_vec = ScalarValue::convert_first_level_array_to_scalar_vec(&list_arr).unwrap();
+    /// let scalar_vec = ScalarValue::convert_array_to_scalar_vec(&list_arr).unwrap();
     ///
     /// let l1 = ListArray::from_iter_primitive::<Int32Type, _, _>(vec![
     ///     Some(vec![Some(1), Some(2), Some(3)]),
@@ -2227,9 +2190,7 @@ impl ScalarValue {
     ///
     /// assert_eq!(scalar_vec, expected);
     /// ```
-    pub fn convert_first_level_array_to_scalar_vec(
-        array: &dyn Array,
-    ) -> Result<Vec<Vec<Self>>> {
+    pub fn convert_array_to_scalar_vec(array: &dyn Array) -> Result<Vec<Vec<Self>>> {
         let mut scalars = Vec::with_capacity(array.len());
 
         for index in 0..array.len() {

datafusion/core/tests/sql/aggregates.rs

@@ -44,9 +44,9 @@ async fn csv_query_array_agg_distinct() -> Result<()> {
     // We should have 1 row containing a list
     let column = actual[0].column(0);
     assert_eq!(column.len(), 1);
-
     let scalar_vec = ScalarValue::convert_array_to_scalar_vec(&column)?;
     let mut scalars = scalar_vec[0].clone();
+
     // workaround lack of Ord of ScalarValue
     let cmp = |a: &ScalarValue, b: &ScalarValue| {
         a.partial_cmp(b).expect("Can compare ScalarValues")

datafusion/physical-expr/src/aggregate/array_agg_ordered.rs

@@ -246,8 +246,7 @@ impl Accumulator for OrderSensitiveArrayAggAccumulator {
         partition_ordering_values.push(self.ordering_values.clone().into());
 
         // Convert array to Scalars to sort them easily. Convert back to array at evaluation.
-        let array_agg_res =
-            ScalarValue::convert_first_level_array_to_scalar_vec(array_agg_values)?;
+        let array_agg_res = ScalarValue::convert_array_to_scalar_vec(array_agg_values)?;
         for v in array_agg_res.into_iter() {
             partition_values.push(v.into());
         }

datafusion/physical-expr/src/aggregate/nth_value.rs

@@ -236,7 +236,7 @@ impl Accumulator for NthValueAccumulator {
         let n_required = self.n.unsigned_abs() as usize;
         if self.ordering_req.is_empty() {
             let array_agg_res =
-                ScalarValue::convert_first_level_array_to_scalar_vec(array_agg_values)?;
+                ScalarValue::convert_array_to_scalar_vec(array_agg_values)?;
             for v in array_agg_res.into_iter() {
                 self.values.extend(v);
                 if self.values.len() > n_required {
@@ -260,7 +260,7 @@ impl Accumulator for NthValueAccumulator {
             partition_ordering_values.push(self.ordering_values.clone());
 
             let array_agg_res =
-                ScalarValue::convert_first_level_array_to_scalar_vec(array_agg_values)?;
+                ScalarValue::convert_array_to_scalar_vec(array_agg_values)?;
 
             for v in array_agg_res.into_iter() {
                 partition_values.push(v.into());