jonahgao commented on code in PR #9352:
URL: https://github.com/apache/arrow-datafusion/pull/9352#discussion_r1505287685
##########
datafusion/functions-array/src/udf.rs:
##########
@@ -83,3 +84,121 @@ 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",
+ arg_types[0].clone(),
+ 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,
Review Comment:
```suggestion
start stop step,
```
Similar to above.
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