cecemei commented on code in PR #18119:
URL: https://github.com/apache/druid/pull/18119#discussion_r2146285833
##########
processing/src/main/java/org/apache/druid/segment/AggregateProjectionMetadata.java:
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@@ -119,6 +122,34 @@ public String toString()
'}';
}
+ /**
+ * Merge two maps of {@link AggregateProjectionMetadata} objects, returning
a new map with the same keys and merged
+ * metadata. If the schemas do not match, the metadata is not merged and the
key is not included in the result.
+ *
+ * @param projections1 first map of projections to merge
+ * @param projections2 second map of projections to merge
+ * @return merged map of projections
+ */
+ public static Map<String, AggregateProjectionMetadata> merge(
Review Comment:
moved it out to `SegmentMetadataQueryQueryToolChest`.
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