feat: support array_resize

datafusion/expr/src/built_in_function.rs

@@ -187,6 +187,8 @@ pub enum BuiltinScalarFunction {
     ArrayExcept,
     /// cardinality
     Cardinality,
+    /// array_resize
+    ArrayResize,
     /// construct an array from columns
     MakeArray,
     /// Flatten
@@ -430,6 +432,7 @@ impl BuiltinScalarFunction {
             BuiltinScalarFunction::ArrayToString => Volatility::Immutable,
             BuiltinScalarFunction::ArrayIntersect => Volatility::Immutable,
             BuiltinScalarFunction::ArrayUnion => Volatility::Immutable,
+            BuiltinScalarFunction::ArrayResize => Volatility::Immutable,
             BuiltinScalarFunction::Range => Volatility::Immutable,
             BuiltinScalarFunction::Cardinality => Volatility::Immutable,
             BuiltinScalarFunction::MakeArray => Volatility::Immutable,
@@ -617,6 +620,7 @@ impl BuiltinScalarFunction {
             BuiltinScalarFunction::ArrayReplaceN => Ok(input_expr_types[0].clone()),
             BuiltinScalarFunction::ArrayReplaceAll => Ok(input_expr_types[0].clone()),
             BuiltinScalarFunction::ArraySlice => Ok(input_expr_types[0].clone()),
+            BuiltinScalarFunction::ArrayResize => Ok(input_expr_types[0].clone()),
             BuiltinScalarFunction::ArrayToString => Ok(Utf8),
             BuiltinScalarFunction::ArrayIntersect => {
                 match (input_expr_types[0].clone(), input_expr_types[1].clone()) {
@@ -980,6 +984,10 @@ impl BuiltinScalarFunction {
             BuiltinScalarFunction::ArrayIntersect => Signature::any(2, self.volatility()),
             BuiltinScalarFunction::ArrayUnion => Signature::any(2, self.volatility()),
             BuiltinScalarFunction::Cardinality => Signature::any(1, self.volatility()),
+            BuiltinScalarFunction::ArrayResize => {
+                Signature::variadic_any(self.volatility())
+            }
+
             BuiltinScalarFunction::Range => Signature::one_of(
                 vec![
                     Exact(vec![Int64]),
@@ -1647,6 +1655,7 @@ impl BuiltinScalarFunction {
             ],
             BuiltinScalarFunction::ArrayUnion => &["array_union", "list_union"],
             BuiltinScalarFunction::Cardinality => &["cardinality"],
+            BuiltinScalarFunction::ArrayResize => &["array_resize", "list_resize"],
             BuiltinScalarFunction::MakeArray => &["make_array", "make_list"],
             BuiltinScalarFunction::ArrayIntersect => {
                 &["array_intersect", "list_intersect"]

datafusion/expr/src/expr_fn.rs

@@ -748,6 +748,14 @@ scalar_expr!(
     array,
     "returns the total number of elements in the array."
 );
+
+scalar_expr!(
+    ArrayResize,
+    array_resize,
+    array size value,
+    "returns an array with the specified size filled with the given value."
+);
+
 nary_scalar_expr!(
     MakeArray,
     array,

datafusion/physical-expr/src/array_expressions.rs

@@ -27,7 +27,7 @@ use arrow::buffer::OffsetBuffer;
 use arrow::compute;
 use arrow::datatypes::{DataType, Field, UInt64Type};
 use arrow::row::{RowConverter, SortField};
-use arrow_buffer::NullBuffer;
+use arrow_buffer::{ArrowNativeType, NullBuffer};
 
 use arrow_schema::{FieldRef, SortOptions};
 use datafusion_common::cast::{
@@ -36,7 +36,8 @@ use datafusion_common::cast::{
 };
 use datafusion_common::utils::{array_into_list_array, list_ndims};
 use datafusion_common::{
-    exec_err, internal_err, not_impl_err, plan_err, DataFusionError, Result,
+    exec_err, internal_datafusion_err, internal_err, not_impl_err, plan_err,
+    DataFusionError, Result, ScalarValue,
 };
 
 use itertools::Itertools;
@@ -1190,7 +1191,10 @@ pub fn array_concat(args: &[ArrayRef]) -> Result<ArrayRef> {
         }
     }
 
-    concat_internal::<i32>(new_args.as_slice())
+    match &args[0].data_type() {
+        DataType::LargeList(_) => concat_internal::<i64>(new_args.as_slice()),
+        _ => concat_internal::<i32>(new_args.as_slice()),
+    }
 }
 
 /// Array_empty SQL function
@@ -1239,7 +1243,7 @@ pub fn array_repeat(args: &[ArrayRef]) -> Result<ArrayRef> {
             let list_array = as_large_list_array(element)?;
             general_list_repeat::<i64>(list_array, count_array)
         }
-        _ => general_repeat(element, count_array),
+        _ => general_repeat::<i32>(element, count_array),
     }
 }
 
@@ -1255,7 +1259,10 @@ pub fn array_repeat(args: &[ArrayRef]) -> Result<ArrayRef> {
 ///     [1, 2, 3], [2, 0, 1] => [[1, 1], [], [3]]
 /// )
 /// ```
-fn general_repeat(array: &ArrayRef, count_array: &Int64Array) -> Result<ArrayRef> {
+fn general_repeat<O: OffsetSizeTrait>(
+    array: &ArrayRef,
+    count_array: &Int64Array,
+) -> Result<ArrayRef> {
     let data_type = array.data_type();
     let mut new_values = vec![];
 
@@ -1288,7 +1295,7 @@ fn general_repeat(array: &ArrayRef, count_array: &Int64Array) -> Result<ArrayRef
     let new_values: Vec<_> = new_values.iter().map(|a| a.as_ref()).collect();
     let values = compute::concat(&new_values)?;
 
-    Ok(Arc::new(ListArray::try_new(
+    Ok(Arc::new(GenericListArray::<O>::try_new(
         Arc::new(Field::new("item", data_type.to_owned(), true)),
         OffsetBuffer::from_lengths(count_vec),
         values,
@@ -2611,6 +2618,100 @@ pub fn array_distinct(args: &[ArrayRef]) -> Result<ArrayRef> {
     }
 }
 
+/// array_resize SQL function
+pub fn array_resize(arg: &[ArrayRef]) -> Result<ArrayRef> {
+    if arg.len() < 2 || arg.len() > 3 {
+        return exec_err!("array_resize needs two or three arguments");
+    }
+
+    let new_len = as_int64_array(&arg[1])?;
+    let new_element = if arg.len() == 3 {
+        Some(arg[2].clone())
+    } else {
+        None
+    };
+
+    match &arg[0].data_type() {
+        DataType::List(field) => {
+            let array = as_list_array(&arg[0])?;
+            general_list_resize::<i32>(array, new_len, field, new_element)
+        }
+        DataType::LargeList(field) => {
+            let array = as_large_list_array(&arg[0])?;
+            general_list_resize::<i64>(array, new_len, field, new_element)
+        }
+        array_type => exec_err!("array_resize does not support type '{array_type:?}'."),
+    }
+}
+
+/// array_resize keep the original array and append the default element to the end
+fn general_list_resize<O: OffsetSizeTrait>(
+    array: &GenericListArray<O>,
+    count_array: &Int64Array,
+    field: &FieldRef,
+    default_element: Option<ArrayRef>,
+) -> Result<ArrayRef>
+where
+    O: TryInto<i64>,
+{
+    let data_type = array.value_type();
+
+    let values = array.values();
+    let original_data = values.to_data();
+
+    // create default element array
+    let default_element = if let Some(default_element) = default_element {
+        default_element
+    } else {
+        let null_scalar = ScalarValue::try_from(&data_type)?;
+        null_scalar.to_array_of_size(original_data.len())?
+    };
+    let default_value_data = default_element.to_data();
+
+    // create a mutable array to store the original data
+    let capacity = Capacities::Array(original_data.len() + default_value_data.len());
+    let mut offsets = vec![O::usize_as(0)];
+    let mut mutable = MutableArrayData::with_capacities(
+        vec![&original_data, &default_value_data],
+        false,
+        capacity,
+    );
+
+    for (row_index, offset_window) in array.offsets().windows(2).enumerate() {
+        let count = count_array.value(row_index).to_usize().ok_or_else(|| {
+            internal_datafusion_err!("array_resize: failed to convert size to usize")
+        })?;
+        let count = O::usize_as(count);
+        let start = offset_window[0];
+        if start + count > offset_window[1] {
+            let extra_count =
+                (start + count - offset_window[1]).try_into().map_err(|_| {
+                    internal_datafusion_err!(
+                        "array_resize: failed to convert size to i64"
+                    )
+                })?;
+            let end = offset_window[1];
+            mutable.extend(0, (start).to_usize().unwrap(), (end).to_usize().unwrap());
+            // append default element
+            for _ in 0..extra_count {
+                mutable.extend(1, row_index, row_index + 1);
+            }
+        } else {
+            let end = start + count;
+            mutable.extend(0, (start).to_usize().unwrap(), (end).to_usize().unwrap());
+        };
+        offsets.push(offsets[row_index] + count);
+    }
+
+    let data = mutable.freeze();
+    Ok(Arc::new(GenericListArray::<O>::try_new(
+        field.clone(),
+        OffsetBuffer::<O>::new(offsets.into()),
+        arrow_array::make_array(data),
+        None,
+    )?))
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

datafusion/physical-expr/src/functions.rs

@@ -419,6 +419,9 @@ pub fn create_physical_fun(
         BuiltinScalarFunction::Cardinality => {
             Arc::new(|args| make_scalar_function(array_expressions::cardinality)(args))
         }
+        BuiltinScalarFunction::ArrayResize => {
+            Arc::new(|args| make_scalar_function(array_expressions::array_resize)(args))
+        }
         BuiltinScalarFunction::MakeArray => {
             Arc::new(|args| make_scalar_function(array_expressions::make_array)(args))
         }

datafusion/proto/proto/datafusion.proto

@@ -667,6 +667,7 @@ enum ScalarFunction {
   FindInSet = 127;
   ArraySort = 128;
   ArrayDistinct = 129;
+  ArrayResize = 130;
 }
 
 message ScalarFunctionNode {

datafusion/proto/src/logical_plan/from_proto.rs

@@ -507,6 +507,7 @@ impl From<&protobuf::ScalarFunction> for BuiltinScalarFunction {
             ScalarFunction::ArrayToString => Self::ArrayToString,
             ScalarFunction::ArrayIntersect => Self::ArrayIntersect,
             ScalarFunction::ArrayUnion => Self::ArrayUnion,
+            ScalarFunction::ArrayResize => Self::ArrayResize,
             ScalarFunction::Range => Self::Range,
             ScalarFunction::Cardinality => Self::Cardinality,
             ScalarFunction::Array => Self::MakeArray,
@@ -1499,6 +1500,11 @@ pub fn parse_expr(
                         .map(|expr| parse_expr(expr, registry))
                         .collect::<Result<Vec<_>, _>>()?,
                 )),
+                ScalarFunction::ArrayResize => Ok(array_slice(
+                    parse_expr(&args[0], registry)?,
+                    parse_expr(&args[1], registry)?,
+                    parse_expr(&args[2], registry)?,
+                )),
                 ScalarFunction::Sqrt => Ok(sqrt(parse_expr(&args[0], registry)?)),
                 ScalarFunction::Cbrt => Ok(cbrt(parse_expr(&args[0], registry)?)),
                 ScalarFunction::Sin => Ok(sin(parse_expr(&args[0], registry)?)),

datafusion/proto/src/logical_plan/to_proto.rs

@@ -1485,6 +1485,7 @@ impl TryFrom<&BuiltinScalarFunction> for protobuf::ScalarFunction {
             BuiltinScalarFunction::ArrayPositions => Self::ArrayPositions,
             BuiltinScalarFunction::ArrayPrepend => Self::ArrayPrepend,
             BuiltinScalarFunction::ArrayRepeat => Self::ArrayRepeat,
+            BuiltinScalarFunction::ArrayResize => Self::ArrayResize,
             BuiltinScalarFunction::ArrayRemove => Self::ArrayRemove,
             BuiltinScalarFunction::ArrayRemoveN => Self::ArrayRemoveN,
             BuiltinScalarFunction::ArrayRemoveAll => Self::ArrayRemoveAll,