guojidan commented on code in PR #9343:
URL: https://github.com/apache/arrow-datafusion/pull/9343#discussion_r1505708694
##########
datafusion/functions-array/src/udf.rs:
##########
@@ -75,8 +116,233 @@ impl ScalarUDFImpl for ArrayToString {
}
fn invoke(&self, args: &[ColumnarValue]) ->
datafusion_common::Result<ColumnarValue> {
- let args = ColumnarValue::values_to_arrays(args)?;
- crate::kernels::array_to_string(&args).map(ColumnarValue::Array)
+ make_scalar_function_with_hints(crate::kernels::array_to_string)(args)
+ }
+
+ fn aliases(&self) -> &[String] {
+ &self.aliases
+ }
+}
+
+#[derive(Debug)]
+pub(super) struct ArrayAppend {
+ signature: Signature,
+ aliases: Vec<String>,
+}
+
+impl ArrayAppend {
+ pub fn new() -> Self {
+ Self {
+ signature: Signature::array_and_element(Volatility::Immutable),
+ aliases: vec![
+ String::from("array_append"),
+ String::from("list_append"),
+ String::from("array_push_back"),
+ String::from("list_push_back"),
+ ],
+ }
+ }
+}
+
+impl ScalarUDFImpl for ArrayAppend {
+ fn as_any(&self) -> &dyn Any {
+ self
+ }
+
+ fn name(&self) -> &str {
+ "array_append"
+ }
+
+ fn signature(&self) -> &Signature {
+ &self.signature
+ }
+
+ fn return_type(&self, arg_types: &[DataType]) ->
datafusion_common::Result<DataType> {
+ Ok(arg_types[0].clone())
+ }
+
+ fn invoke(&self, args: &[ColumnarValue]) ->
datafusion_common::Result<ColumnarValue> {
+ make_scalar_function_with_hints(crate::kernels::array_append)(args)
Review Comment:
but I think `make_scalar_function_with_hints` function have clear logic,
determine output is Scalar or Array, I want
to keep it 🤔
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