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A Cascades union sorted through an order function such as `order_desc_nulls_last` compares by `to_ordered_bytes(...)`, which evaluates to a `ByteString`. `FIELD_COMPARATOR` handled `byte[]` but not `ByteString`, so the comparison fell through to `Comparable` and threw a `ClassCastException` as soon as two legs tied on the preceding key columns. Compare them unsigned lexicographically, which is the order the ordered-bytes encoding is built for.
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Fix a
ClassCastExceptionwhen a Cascades union compares byto_ordered_bytes(...)and two legs tie on the preceding key columns.