JingsongLi commented on code in PR #7889:
URL: https://github.com/apache/paimon/pull/7889#discussion_r3274023548
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paimon-common/src/main/java/org/apache/paimon/data/Blob.java:
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@@ -38,6 +38,31 @@
@Public
public interface Blob {
+ /**
+ * The placeholder blob, mainly for blob update in data-evolution. It
should never be exposed to
+ * users.
+ */
+ Blob PLACE_HOLDER =
Review Comment:
I understand that you not only need this class for reading, but also for
writing. If you skip these elements, the changes will be significant.
I thin you can just introduce a `BlobPlaceHolder implements Blob,
Serializable` for this, use instance of is better.
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