chenjunjiedada commented on a change in pull request #830: Support name mapping
resolution for parquet
URL: https://github.com/apache/incubator-iceberg/pull/830#discussion_r405208699
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File path:
parquet/src/main/java/org/apache/iceberg/parquet/ParquetSchemaUtil.java
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@@ -87,29 +82,21 @@ public static boolean hasIds(MessageType fileSchema) {
// Try to convert the type to Iceberg. If an ID assignment is needed,
return false.
ParquetTypeVisitor.visit(fileSchema, new MessageTypeToType(fileSchema) {
@Override
- protected int nextId() {
- throw new IllegalStateException("Needed to assign ID");
+ protected int getId(org.apache.parquet.schema.Type type) {
+ org.apache.parquet.schema.Type.ID id = type.getId();
+ if (id != null) {
+ throw new IllegalStateException("at least one ID exists");
Review comment:
Did I misunderstand the comment? I thought you meant file schema either
has all columns with IDs or without ID. Do you mean that a file schema can have
some of the columns with IDs and some without?
> This also needs to update ParquetSchemaUtil.hasIds so that any ID causes
it to return true, instead of any missing ID. This should be okay since files
either have IDs or do not, so it is not a behavior change.
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