findepi commented on code in PR #13756:
URL: https://github.com/apache/datafusion/pull/13756#discussion_r1884119335
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datafusion/functions-nested/src/extract.rs:
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@@ -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() {
Review Comment:
I did try to write some slt regression tests, but i couldn't expose the bug.
Yet, the unit tests proves the bug exists.
I trust you have a better intuition how signature related bug can be exposed
in SLT. Please advise.
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