tustvold commented on code in PR #4389:
URL: https://github.com/apache/arrow-rs/pull/4389#discussion_r1224368817
##########
parquet/src/column/writer/mod.rs:
##########
@@ -1152,6 +1181,56 @@ fn compare_greater_byte_array_decimals(a: &[u8], b:
&[u8]) -> bool {
(a[1..]) > (b[1..])
}
+/// Truncate a UTF8 slice to the longest prefix that is still a valid UTF8
string, while being less than `max_len` bytes.
+fn truncate_utf8(data: &str, max_len: usize) -> Vec<u8> {
Review Comment:
```suggestion
fn truncate_utf8(data: &str, max_len: usize) -> &str {
```
Might allow preserving the UTF-8ness
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