corwinjoy commented on code in PR #39677:
URL: https://github.com/apache/arrow/pull/39677#discussion_r1458156511
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cpp/src/generated/parquet_types.h:
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@@ -4058,6 +4059,11 @@ class FileMetaData : public virtual
::apache::thrift::TBase {
*/
std::string footer_signing_key_metadata;
+ /**
+ * Flag to read only the first row group
+ */
+ bool read_only_rowgroup_0;
Review Comment:
@mapleFU Please see the discussion I tagged you on in the related github
spec. As discussed, the main bottleneck is reading huge metadata files. I
needed a way to quickly read minimal metadata. Eventually, this will likely
become some derived "fast metadata" class with a thrift spec that reads minimal
information. But, I am not all that familiar with the generator and don't know
how to do that yet. So, this is a proof-of-concept / performance benchmark
modification of the file for now.
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