blaginin commented on code in PR #15255:
URL: https://github.com/apache/datafusion/pull/15255#discussion_r2000955601


##########
datafusion/core/tests/user_defined/expr_planner.rs:
##########
@@ -73,52 +73,62 @@ async fn plan_and_collect(sql: &str) -> 
Result<Vec<RecordBatch>> {
     ctx.sql(sql).await?.collect().await
 }
 
+fn fmt_batches(batches: &[RecordBatch]) -> String {
+    use arrow::util::pretty::pretty_format_batches;
+    match pretty_format_batches(batches) {
+        Ok(formatted) => formatted.to_string(),
+        Err(e) => format!("Error formatting record batches: {}", e),
+    }
+}

Review Comment:
   can we use `batches_to_string` for that? 



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