somu-imply commented on code in PR #15470:
URL: https://github.com/apache/druid/pull/15470#discussion_r1534693995
##########
extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/exec/Limits.java:
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@@ -96,4 +96,11 @@ public class Limits
* Max number of partition buckets for ingestion queries.
*/
public static final int MAX_PARTITION_BUCKETS = 5_000;
+
+ /**
+ * Max number of rows with the same key in a window. This acts as a
guardrail for
+ * data distribution with high cardinality
Review Comment:
This is for the key with many unique values under it. Since this one key can
have many possible values under it I'm calling it high cardinality
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