rdblue commented on code in PR #6582:
URL: https://github.com/apache/iceberg/pull/6582#discussion_r1073829241
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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:
Focusing on just the table level NDV case:
* We don't want to introduce a new stats blob type if possible. We chose
Theta because of the additional capabilities the sketch has.
* Can you be more specific about what Spark supports? Is it that we want HLL
to feed HLL buffers into Spark? I would expect Spark to want NDV values, not
the buffer/blob data.
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