Au-Miner commented on code in PR #28074:
URL: https://github.com/apache/flink/pull/28074#discussion_r3207972671
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flink-python/src/main/java/org/apache/flink/table/runtime/typeutils/serializers/python/RowDataSerializer.java:
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@@ -225,5 +226,32 @@ public TypeSerializerSchemaCompatibility<RowData>
resolveSchemaCompatibility(
return intermediateResult.getFinalResult();
}
+
+ /**
+ * Returns true when new field types are structurally equal to old
ones ignoring top-level
Review Comment:
Yes, I have modified the top-level detection and replaced it with cascading
detection. If there is a transformation from 'null' to 'not null', even sub
fields will be rejected
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