alamb commented on code in PR #13756:
URL: https://github.com/apache/datafusion/pull/13756#discussion_r1884568977
##########
datafusion/functions-nested/src/extract.rs:
##########
@@ -993,3 +993,84 @@ where
let data = mutable.freeze();
Ok(arrow::array::make_array(data))
}
+
+#[cfg(test)]
+mod tests {
+ use super::array_element_udf;
+ use arrow_schema::{DataType, Field};
+ use datafusion_common::{Column, DFSchema, ScalarValue};
+ use datafusion_expr::expr::ScalarFunction;
+ use datafusion_expr::{cast, Expr, ExprSchemable};
+ use std::collections::HashMap;
+
+ #[test]
+ fn test_array_element_return_type() {
+ let complex_type = DataType::FixedSizeList(
Review Comment:
Weird, when I remove this line in expr schema the test passes (with
FixedSizedList):
```diff
diff --git a/datafusion/expr/src/expr_schema.rs
b/datafusion/expr/src/expr_schema.rs
index 3317deafb..50aeb222f 100644
--- a/datafusion/expr/src/expr_schema.rs
+++ b/datafusion/expr/src/expr_schema.rs
@@ -152,6 +152,7 @@ impl ExprSchemable for Expr {
.map(|e| e.get_type(schema))
.collect::<Result<Vec<_>>>()?;
+
// Verify that function is invoked with correct number and
type of arguments as defined in `TypeSignature`
let new_data_types =
data_types_with_scalar_udf(&arg_data_types, func)
.map_err(|err| {
@@ -168,7 +169,7 @@ impl ExprSchemable for Expr {
// Perform additional function arguments validation (due to
limited
// expressiveness of `TypeSignature`), then infer return
type
- Ok(func.return_type_from_exprs(args, schema,
&new_data_types)?)
+ Ok(func.return_type_from_exprs(args, schema,
&arg_data_types)?)
}
Expr::WindowFunction(window_function) => self
.data_type_and_nullable_with_window_function(schema,
window_function)
```
Which basically says pass the input data types directly to the function call
rather than calling `data_types_with_scalar_udf` first (which claims to type
coercion)
https://github.com/apache/datafusion/blob/68ead283bd47de75d8aa79f6df5fe78a957df50c/datafusion/expr/src/expr_schema.rs#L171
🤔 this looks like it was added in Sep via
https://github.com/apache/datafusion/commit/1b3608da7ca59d8d987804834d004e8b3e349d18
(before that the input types were passed directly) 🤔
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