rambleraptor commented on code in PR #1463:
URL: https://github.com/apache/iceberg-go/pull/1463#discussion_r3582851610


##########
transforms.go:
##########
@@ -77,7 +84,9 @@ func ParseTransform(s string) (Transform, error) {
                return HourTransform{}, nil
        }
 
-       return nil, fmt.Errorf("%w: %s", ErrInvalidTransform, s)
+       // Unknown transform: v3 readers must load these and ignore them when
+       // filtering instead of failing. Keep the original string so it 
round-trips.
+       return UnknownTransform{name: s}, nil

Review Comment:
   I kept the behavior + added a comment. I double checked Java and it appears 
to do a byte-for-byte check as well.



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