port range function and change gen_series logic

datafusion/expr/src/built_in_function.rs

@@ -186,8 +186,6 @@ pub enum BuiltinScalarFunction {
     MakeArray,
     /// Flatten
     Flatten,
-    /// Range
-    Range,
 
     // struct functions
     /// struct
@@ -431,7 +429,6 @@ impl BuiltinScalarFunction {
             BuiltinScalarFunction::ArrayIntersect => Volatility::Immutable,
             BuiltinScalarFunction::ArrayUnion => Volatility::Immutable,
             BuiltinScalarFunction::ArrayResize => Volatility::Immutable,
-            BuiltinScalarFunction::Range => Volatility::Immutable,
             BuiltinScalarFunction::Cardinality => Volatility::Immutable,
             BuiltinScalarFunction::MakeArray => Volatility::Immutable,
             BuiltinScalarFunction::Ascii => Volatility::Immutable,
@@ -643,9 +640,6 @@ impl BuiltinScalarFunction {
                     (dt, _) => Ok(dt),
                 }
             }
-            BuiltinScalarFunction::Range => {
-                Ok(List(Arc::new(Field::new("item", Int64, true))))
-            }
             BuiltinScalarFunction::ArrayExcept => {
                 match (input_expr_types[0].clone(), input_expr_types[1].clone()) {
                     (DataType::Null, _) | (_, DataType::Null) => {
@@ -987,14 +981,6 @@ impl BuiltinScalarFunction {
                 Signature::variadic_any(self.volatility())
             }
 
-            BuiltinScalarFunction::Range => Signature::one_of(
-                vec![
-                    Exact(vec![Int64]),
-                    Exact(vec![Int64, Int64]),
-                    Exact(vec![Int64, Int64, Int64]),
-                ],
-                self.volatility(),
-            ),
             BuiltinScalarFunction::Struct => Signature::variadic_any(self.volatility()),
             BuiltinScalarFunction::Concat
             | BuiltinScalarFunction::ConcatWithSeparator => {
@@ -1628,7 +1614,6 @@ impl BuiltinScalarFunction {
                 &["array_intersect", "list_intersect"]
             }
             BuiltinScalarFunction::OverLay => &["overlay"],
-            BuiltinScalarFunction::Range => &["range", "generate_series"],
 
             // struct functions
             BuiltinScalarFunction::Struct => &["struct"],

datafusion/expr/src/expr_fn.rs

@@ -767,12 +767,6 @@ scalar_expr!(
     "Returns an array of the elements in the intersection of array1 and array2."
 );
 
-nary_scalar_expr!(
-    Range,
-    gen_range,
-    "Returns a list of values in the range between start and stop with step."
-);
-
 // string functions
 scalar_expr!(Ascii, ascii, chr, "ASCII code value of the character");
 scalar_expr!(

datafusion/functions-array/src/kernels.rs

@@ -23,11 +23,12 @@ use arrow::array::{
     StringArray, UInt16Array, UInt32Array, UInt64Array, UInt8Array,
 };
 use arrow::datatypes::DataType;
-use datafusion_common::cast::{as_large_list_array, as_list_array, as_string_array};
+use datafusion_common::cast::{
+    as_int64_array, as_large_list_array, as_list_array, as_string_array,
+};
 use datafusion_common::{exec_err, DataFusionError};
 use std::any::type_name;
 use std::sync::Arc;
-
 macro_rules! downcast_arg {
     ($ARG:expr, $ARRAY_TYPE:ident) => {{
         $ARG.as_any().downcast_ref::<$ARRAY_TYPE>().ok_or_else(|| {
@@ -252,3 +253,67 @@ pub(super) fn array_to_string(args: &[ArrayRef]) -> datafusion_common::Result<Ar
 
     Ok(Arc::new(string_arr))
 }
+
+use arrow::array::ListArray;
+use arrow::buffer::OffsetBuffer;
+use arrow::datatypes::Field;
+/// Generates an array of integers from start to stop with a given step.
+///
+/// This function takes 1 to 3 ArrayRefs as arguments, representing start, stop, and step values.
+/// It returns a `Result<ArrayRef>` representing the resulting ListArray after the operation.
+///
+/// # Arguments
+///
+/// * `args` - An array of 1 to 3 ArrayRefs representing start, stop, and step(step value can not be zero.) values.
+///
+/// # Examples
+///
+/// gen_range(3) => [0, 1, 2]
+/// gen_range(1, 4) => [1, 2, 3]
+/// gen_range(1, 7, 2) => [1, 3, 5]
+pub fn gen_range(
+    args: &[ArrayRef],
+    include_upper: i64,
+) -> datafusion_common::Result<ArrayRef> {
+    let (start_array, stop_array, step_array) = match args.len() {
+        1 => (None, as_int64_array(&args[0])?, None),
+        2 => (
+            Some(as_int64_array(&args[0])?),
+            as_int64_array(&args[1])?,
+            None,
+        ),
+        3 => (
+            Some(as_int64_array(&args[0])?),
+            as_int64_array(&args[1])?,
+            Some(as_int64_array(&args[2])?),
+        ),
+        _ => return exec_err!("gen_range expects 1 to 3 arguments"),
+    };
+
+    let mut values = vec![];
+    let mut offsets = vec![0];
+    for (idx, stop) in stop_array.iter().enumerate() {
+        let stop = stop.unwrap_or(0) + include_upper;
+        let start = start_array.as_ref().map(|arr| arr.value(idx)).unwrap_or(0);
+        let step = step_array.as_ref().map(|arr| arr.value(idx)).unwrap_or(1);
+        if step == 0 {
+            return exec_err!("step can't be 0 for function range(start [, stop, step]");
+        }
+        if step < 0 {
+            // Decreasing range
+            values.extend((stop + 1..start + 1).rev().step_by((-step) as usize));
+        } else {
+            // Increasing range
+            values.extend((start..stop).step_by(step as usize));
+        }
+
+        offsets.push(values.len() as i32);
+    }
+    let arr = Arc::new(ListArray::try_new(
+        Arc::new(Field::new("item", DataType::Int64, true)),
+        OffsetBuffer::new(offsets.into()),
+        Arc::new(Int64Array::from(values)),
+        None,
+    )?);
+    Ok(arr)
+}

datafusion/functions-array/src/lib.rs

@@ -44,7 +44,11 @@ pub mod expr_fn {
 
 /// Registers all enabled packages with a [`FunctionRegistry`]
 pub fn register_all(registry: &mut dyn FunctionRegistry) -> Result<()> {
-    let functions: Vec<Arc<ScalarUDF>> = vec![udf::array_to_string_udf()];
+    let functions: Vec<Arc<ScalarUDF>> = vec![
+        udf::array_to_string_udf(),
+        udf::range_udf(),
+        udf::gen_series_udf(),
+    ];
     functions.into_iter().try_for_each(|udf| {
         let existing_udf = registry.register_udf(udf)?;
         if let Some(existing_udf) = existing_udf {

datafusion/functions-array/src/udf.rs

@@ -18,20 +18,21 @@
 //! [`ScalarUDFImpl`] definitions for array functions.
 
 use arrow::datatypes::DataType;
+use arrow::datatypes::Field;
 use datafusion_common::{plan_err, DataFusionError};
 use datafusion_expr::expr::ScalarFunction;
 use datafusion_expr::Expr;
+use datafusion_expr::TypeSignature::Exact;
 use datafusion_expr::{ColumnarValue, ScalarUDFImpl, Signature, Volatility};
 use std::any::Any;
-
+use std::sync::Arc;
 // Create static instances of ScalarUDFs for each function
 make_udf_function!(ArrayToString,
     array_to_string,
     array delimiter, // arg name
     "converts each element to its text representation.", // doc
     array_to_string_udf // internal function name
 );
-
 #[derive(Debug)]
 pub(super) struct ArrayToString {
     signature: Signature,
@@ -83,3 +84,112 @@ impl ScalarUDFImpl for ArrayToString {
         &self.aliases
     }
 }
+
+make_udf_function!(
+    Range,
+    range,
+    input diamilter,
+    "create a list of values in the range between start and stop",
+    range_udf
+);
+#[derive(Debug)]
+pub(super) struct Range {
+    signature: Signature,
+    aliases: Vec<String>,
+}
+impl Range {
+    pub fn new() -> Self {
+        use DataType::*;
+        Self {
+            signature: Signature::one_of(
+                vec![
+                    Exact(vec![Int64]),
+                    Exact(vec![Int64, Int64]),
+                    Exact(vec![Int64, Int64, Int64]),
+                ],
+                Volatility::Immutable,
+            ),
+            aliases: vec![String::from("range")],
+        }
+    }
+}
+impl ScalarUDFImpl for Range {
+    fn as_any(&self) -> &dyn Any {
+        self
+    }
+    fn name(&self) -> &str {
+        "range"
+    }
+
+    fn signature(&self) -> &Signature {
+        &self.signature
+    }
+
+    fn return_type(&self, arg_types: &[DataType]) -> datafusion_common::Result<DataType> {
+        use DataType::*;
+        Ok(List(Arc::new(Field::new("item", Int64, true))))
+    }
+
+    fn invoke(&self, args: &[ColumnarValue]) -> datafusion_common::Result<ColumnarValue> {
+        let args = ColumnarValue::values_to_arrays(args)?;
+        crate::kernels::gen_range(&args, 0).map(ColumnarValue::Array)
+    }
+
+    fn aliases(&self) -> &[String] {
+        &self.aliases
+    }
+}
+make_udf_function!(
+    GenSeries,
+    gen_series,
+    input diamilter,
+    "create a list of values in the range between start and stop, include upper bound",
+    gen_series_udf
+);
+#[derive(Debug)]
+pub(super) struct GenSeries {
+    signature: Signature,
+    aliases: Vec<String>,
+}
+impl GenSeries {
+    pub fn new() -> Self {
+        use DataType::*;
+        Self {
+            signature: Signature::one_of(
+                vec![
+                    Exact(vec![Int64]),
+                    Exact(vec![Int64, Int64]),
+                    Exact(vec![Int64, Int64, Int64]),
+                ],
+                Volatility::Immutable,
+            ),
+            aliases: vec![String::from("generate_series")],
+        }
+    }
+}
+impl ScalarUDFImpl for GenSeries {
+    fn as_any(&self) -> &dyn Any {
+        self
+    }
+    fn name(&self) -> &str {
+        "generate_series"
+    }
+
+    fn signature(&self) -> &Signature {
+        &self.signature
+    }
+
+    fn return_type(&self, arg_types: &[DataType]) -> datafusion_common::Result<DataType> {
+        use DataType::*;
+        Ok(List(Arc::new(Field::new("item", Int64, true))))
+    }
+
+    fn invoke(&self, args: &[ColumnarValue]) -> datafusion_common::Result<ColumnarValue> {
+        let args = ColumnarValue::values_to_arrays(args)?;
+        crate::kernels::gen_range(&args, 1).map(ColumnarValue::Array)
+    }
+
+    fn aliases(&self) -> &[String] {
+        &self.aliases
+    }
+}

datafusion/physical-expr/src/array_expressions.rs

@@ -39,7 +39,6 @@ use datafusion_common::{
     exec_err, internal_datafusion_err, internal_err, not_impl_err, plan_err,
     DataFusionError, Result, ScalarValue,
 };
-
 use itertools::Itertools;
 
 macro_rules! downcast_arg {

datafusion/physical-expr/src/functions.rs

@@ -410,9 +410,6 @@ pub fn create_physical_fun(
         BuiltinScalarFunction::ArrayIntersect => Arc::new(|args| {
             make_scalar_function_inner(array_expressions::array_intersect)(args)
         }),
-        BuiltinScalarFunction::Range => Arc::new(|args| {
-            make_scalar_function_inner(array_expressions::gen_range)(args)
-        }),
         BuiltinScalarFunction::Cardinality => Arc::new(|args| {
             make_scalar_function_inner(array_expressions::cardinality)(args)
         }),

datafusion/proto/proto/datafusion.proto

@@ -665,7 +665,7 @@ enum ScalarFunction {
   ArrayIntersect = 119;
   ArrayUnion = 120;
   OverLay = 121;
-  Range = 122;
+  /// 122 is Range
   ArrayExcept = 123;
   ArrayPopFront = 124;
   Levenshtein = 125;