comphead commented on code in PR #2968:
URL: https://github.com/apache/arrow-datafusion/pull/2968#discussion_r931283945
##########
datafusion/row/src/writer.rs:
##########
@@ -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:
> And in the `set_utf8` or `set_binary`, we can use
>
> ```
> self.varlena_offset += (size + 8);
> self.varlena_width += (size +8);
> ```
>
> to update the offset and width.
@liukun4515 That was my vision too. But my concern here if we add 8 extra
bytes per field, it may bloat the row size significantly?
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