emkornfield commented on code in PR #39677:
URL: https://github.com/apache/arrow/pull/39677#discussion_r1456719437
##########
cpp/src/parquet/metadata.cc:
##########
@@ -826,6 +831,32 @@ class FileMetaData::FileMetaDataImpl {
file_decryptor_ = std::move(file_decryptor);
}
+ void set_column_offsets(const std::vector<std::shared_ptr<OffsetIndex>>&
column_offsets, int64_t expected_num_rows) {
+ if (num_row_groups() != 1) {
+ throw ParquetException(
+ "This operation can only be applied to metadata with a single
row group");
+ }
+
+ format::RowGroup& row_group = metadata_->row_groups[0];
+ int idx = 0;
+ for (format::ColumnChunk& chunk : row_group.columns) {
+ // Assume a chunk has only 1 page for now
Review Comment:
a column chunk will very frequently has multiple pages.
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