huaxingao commented on code in PR #12494:
URL: https://github.com/apache/iceberg/pull/12494#discussion_r2040822469
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core/src/main/java/org/apache/iceberg/MetadataColumns.java:
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@@ -50,7 +50,7 @@ private MetadataColumns() {}
public static final int SPEC_ID_COLUMN_ID = Integer.MAX_VALUE - 4;
public static final String SPEC_ID_COLUMN_DOC = "Spec ID used to track the
file containing a row";
public static final NestedField SPEC_ID =
- NestedField.required(
+ NestedField.optional(
Review Comment:
In Spark 4.0, the metadata columns are nullable, so need to change this
field to optional.
https://github.com/apache/spark/pull/50246#discussion_r2023825620
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