pvary commented on code in PR #8803:
URL: https://github.com/apache/iceberg/pull/8803#discussion_r1371953259
##########
core/src/main/java/org/apache/iceberg/BaseFile.java:
##########
@@ -504,6 +508,27 @@ private static Map<Integer, ByteBuffer>
toReadableByteBufferMap(Map<Integer, Byt
}
}
+ private static <TypeT> Map<Integer, TypeT> filterColumnsStats(
+ Map<Integer, TypeT> map, Set<Integer> columnIds) {
+ if (columnIds == null || columnIds.isEmpty()) {
+ return SerializableMap.copyOf(map);
+ }
+
+ if (map == null) {
+ return null;
+ }
+
+ Map<Integer, TypeT> filtered =
Maps.newHashMapWithExpectedSize(columnIds.size());
+ for (Integer columnId : columnIds) {
+ TypeT value = map.get(columnId);
+ if (value != null) {
Review Comment:
My previous answer was not clear enough. Let me rephrase: "we can have maps
where the columnId is not contained in the key list". In this case the
`map.get(columnId);` returns `null`. To return the correct map, we should not
add the key to the list in this case.
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