flyrain commented on code in PR #6582:
URL: https://github.com/apache/iceberg/pull/6582#discussion_r1070140194
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core/src/main/java/org/apache/iceberg/puffin/StandardBlobTypes.java:
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@@ -26,4 +26,6 @@ private StandardBlobTypes() {}
* href="https://datasketches.apache.org/";>Apache DataSketches</a> library
*/
public static final String APACHE_DATASKETCHES_THETA_V1 =
"apache-datasketches-theta-v1";
+
+ public static final String NDV_BLOB = "ndv-blob";
Review Comment:
We should use one blob type for NDV ideally, although Spark doesn't have the
sketch data. I'm also curious how sketch data is useful for a table level
metric. It is absolutely useful for file-level and partition-level since we can
merge them later.
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