aokolnychyi commented on code in PR #15268:
URL: https://github.com/apache/iceberg/pull/15268#discussion_r2785370210
##########
api/src/main/java/org/apache/iceberg/Schema.java:
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@@ -629,4 +631,30 @@ public static void checkCompatibility(Schema schema, int
formatVersion) {
formatVersion, Joiner.on("\n- ").join(problems.values())));
}
}
+
+ // indexes all fields from schemas, preferring field definitions from higher
schema IDs
+ public static Map<Integer, NestedField> indexFields(Collection<Schema>
schemas) {
+ if (schemas.size() == 1) {
+ Schema schema = Iterables.getOnlyElement(schemas);
+ return schema.lazyIdToField();
+ }
+
+ Map<Integer, NestedField> fields = Maps.newHashMap();
+ Set<Integer> seenSchemaIds = Sets.newHashSet();
+
+ for (Schema schema : sortByIdAsc(schemas)) {
+ if (!seenSchemaIds.contains(schema.schemaId())) {
Review Comment:
That's a good idea.
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