rdblue commented on a change in pull request #1790:
URL: https://github.com/apache/iceberg/pull/1790#discussion_r533754607



##########
File path: orc/src/main/java/org/apache/iceberg/orc/OrcMetrics.java
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@@ -114,6 +120,7 @@ private static Metrics buildOrcMetrics(final long 
numOfRows, final TypeDescripti
           columnSizes,
           valueCounts,
           nullCounts,
+          Maps.newHashMap(),

Review comment:
       Why not use null when metrics are missing?




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