xanderbailey commented on code in PR #2398:
URL: https://github.com/apache/iceberg-rust/pull/2398#discussion_r3976791054
##########
crates/iceberg/src/spec/values/decimal_utils.rs:
##########
@@ -196,6 +196,33 @@ pub fn i128_to_be_bytes_min(value: i128) -> Vec<u8> {
bytes[start..].to_vec()
}
+/// Encode an i128 as exactly `len` big-endian two's complement bytes,
matching a
+/// Parquet `FIXED_LEN_BYTE_ARRAY` column of that declared `type_length`.
+///
+/// Returns `None` if `value` does not fit in `len` bytes, since a truncated
+/// encoding would represent a different number.
+pub fn decimal_to_fixed_length_bytes_exact(value: i128, len: usize) ->
Option<Vec<u8>> {
Review Comment:
[1c4a8c1](https://github.com/apache/iceberg-rust/pull/2398/commits/1c4a8c1a5bd3b022606e92a8e4168b84de9c5e07)
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