aokolnychyi commented on a change in pull request #1335:
URL: https://github.com/apache/iceberg/pull/1335#discussion_r470039388
##########
File path: parquet/src/main/java/org/apache/iceberg/parquet/ParquetUtil.java
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@@ -136,6 +154,19 @@ public static Metrics footerMetrics(ParquetMetadata
metadata, MetricsConfig metr
toBufferMap(fileSchema, lowerBounds), toBufferMap(fileSchema,
upperBounds));
}
+ private static MessageType getParquetType(ParquetMetadata metadata, Schema
expectedSchema, NameMapping nameMapping) {
+ MessageType type = metadata.getFileMetaData().getSchema();
+ if (ParquetSchemaUtil.hasIds(type)) {
+ return expectedSchema != null ? ParquetSchemaUtil.pruneColumns(type,
expectedSchema) : type;
+ } else if (nameMapping != null) {
+ MessageType typeWithIds = ParquetSchemaUtil.applyNameMapping(type,
nameMapping);
Review comment:
An alternative is to build a custom visitor that would combine logic
from `ApplyNameMapping` and `PruneColumns`.
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