cloud-fan commented on code in PR #38904:
URL: https://github.com/apache/spark/pull/38904#discussion_r1044214341
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sql/catalyst/src/main/java/org/apache/spark/sql/connector/read/Statistics.java:
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@@ -31,4 +35,7 @@
public interface Statistics {
OptionalLong sizeInBytes();
OptionalLong numRows();
+ default Optional<Map<NamedReference, ColumnStatistics>> columnStats() {
Review Comment:
shall we use empty map to indicate no column stats? Catalyst column stats
also use map directly.
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