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expr.get_type (ExprSchemable::get_type) returns wrong type for array functions on nested lists #13755

@findepi

Description

@findepi

Describe the bug

When list is nested, containing a non-List list-like type, then this assertion doesn't hold true

let udf = array_element_udf();
let udf_type = udf.inner().return_type(&[list_type, index_type])?;

let simplified = Expr::ScalarFunction(expr::ScalarFunction {
        func: udf,
        args: args,
    });

let expr_type = SimplifyInfo::get_data_type(&info, &simplified)?;

assert_eq!(udf_type, expr_type);
assertion `left == right` failed
  left: List(Field { name: "element", data_type: Binary, nullable: true, dict_id: 0, dict_is_ordered: false, metadata: {} })
 right: FixedSizeList(Field { name: "element", data_type: Binary, nullable: true, dict_id: 0, dict_is_ordered: false, metadata: {} }, 1)

To Reproduce

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Expected behavior

For a scalar function call, the SimplifyInfo::get_data_type and ExprSchemable::get_type should return the same type the scalar would return.

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