rdblue commented on code in PR #9008:
URL: https://github.com/apache/iceberg/pull/9008#discussion_r1742287758
##########
api/src/main/java/org/apache/iceberg/Schema.java:
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@@ -573,4 +575,27 @@ private List<NestedField> reassignIds(List<NestedField>
columns, TypeUtil.GetID
});
return res.asStructType().fields();
}
+
+ /**
+ * Check the compatibility of the schema with a format version.
+ *
+ * <p>This validates that the schema does not contain types that were
released in later format
+ * versions.
+ *
+ * @param schema a Schema
+ * @param formatVersion table format version
+ */
+ public static void checkCompatibility(Schema schema, int formatVersion) {
+ // check the type in each field
+ for (NestedField field : schema.lazyIdToField().values()) {
Review Comment:
Hm. Now that I'm thinking about this more, we may want to accumulate a full
set of problems and then show them in one message. That can be done as a
follow-up though.
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