liukun4515 commented on code in PR #2968:
URL: https://github.com/apache/arrow-datafusion/pull/2968#discussion_r931731720
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datafusion/row/src/writer.rs:
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@@ -349,7 +349,7 @@ pub(crate) fn write_field_utf8(
let from = from.as_any().downcast_ref::<StringArray>().unwrap();
let s = from.value(row_idx);
let new_width = to.current_width() + s.as_bytes().len();
Review Comment:
I figure out the corner case to panic for your fix.
You can add the test with string data type, but the each value of array is
empty, just like that
```
arrow::array::StringArray::from(vec!["","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","",""]);
```
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