kbendick commented on a change in pull request #3332:
URL: https://github.com/apache/iceberg/pull/3332#discussion_r739413295
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File path: orc/src/main/java/org/apache/iceberg/orc/OrcMetrics.java
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@@ -262,6 +269,16 @@ private static Metrics buildOrcMetrics(final long
numOfRows, final TypeDescripti
return Optional.ofNullable(Conversions.toByteBuffer(type,
truncateIfNeeded(Bound.UPPER, type, max, metricsMode)));
}
+ // ORC uses NaN in its metrics for floating point numbers (float and double).
+ // To avoid storing NaN in the Iceberg metrics, NaN is normalized to +/-
Infinity for max / min respectively.
+ private static Object normalizeFloatingPointColumnsIfNeeded(Bound bound,
Type type, double value) {
+ if (type.typeId() == Type.TypeID.DOUBLE) {
+ return Double.isNaN(value) ? (bound == Bound.UPPER ?
Double.POSITIVE_INFINITY : Double.NEGATIVE_INFINITY) : value;
Review comment:
Ah that's a good idea. Wasn't a fan of the double ternary.
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