aihuaxu commented on code in PR #12238:
URL: https://github.com/apache/iceberg/pull/12238#discussion_r1974489717
##########
core/src/main/java/org/apache/iceberg/avro/AvroCustomOrderSchemaVisitor.java:
##########
@@ -27,13 +27,20 @@
import org.apache.iceberg.relocated.com.google.common.collect.Lists;
abstract class AvroCustomOrderSchemaVisitor<T, F> {
+ private static final String METADATA = "metadata";
+
public static <T, F> T visit(Schema schema, AvroCustomOrderSchemaVisitor<T,
F> visitor) {
switch (schema.getType()) {
case RECORD:
// check to make sure this hasn't been visited before
String name = schema.getFullName();
Preconditions.checkState(
!visitor.recordLevels.contains(name), "Cannot process recursive
Avro record %s", name);
+ Preconditions.checkArgument(
Review Comment:
Make sense. I think we don't need `visitor.recordLevels.push(name)` and
`visitor.recordLevels.pop();` for visiting Variant fields since we know they
are not records.
BTW: I didn't change but seems we should change the following
```
visitor.recordLevels.pop();
return visitor.record(schema, names, Iterables.transform(results,
Supplier::get));
```
to
```
visitor.recordLevels.push(name);
...
Iterable<> itFields = Iterables.transform(results, Supplier::get);
visitor.recordLevels.pop();
return visitor.record(schema, names, itFields);
```
in order to fail if there is any recursive nodes in Avro schema?
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