github-actions[bot] commented on code in PR #65253:
URL: https://github.com/apache/doris/pull/65253#discussion_r3584355952
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be/src/format/transformer/vparquet_transformer.cpp:
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@@ -359,7 +362,6 @@ Status
VParquetTransformer::collect_file_statistics_after_close(TIcebergColumnSt
}
bool has_any_null_count = false;
Review Comment:
This root-only check drops valid Parquet bounds for nested primitive fields.
The stats loop above is keyed by each physical Parquet column's
`schema_node()->field_id()`, and `ArrowSchemaUtil::convert_to()` recursively
writes `PARQUET:field_id` for struct children/list elements/map key-values, so
a schema like `struct<c1:int>` reaches this helper with the child field ID
rather than the root struct ID. Because only `root_struct().fields()` are
scanned here, that primitive child ID falls through to `can_write=false`, and
FE commits the file without the lower/upper bounds that Iceberg can use for
nested-field pruning. Please resolve the Iceberg type by field ID recursively,
or otherwise keep primitive nested field IDs while suppressing only
non-primitive container bounds.
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