Re: [PR] Refine parquet documentation on types and metadata [arrow-rs]

["mapleFU (via GitHub)" <gi...@apache.org>]

mapleFU commented on code in PR #5786:
URL: https://github.com/apache/arrow-rs/pull/5786#discussion_r1606040695


##########
parquet/src/file/metadata.rs:
##########
@@ -72,10 +69,27 @@ pub type ParquetColumnIndex = Vec<Vec<Index>>;
 /// parquet file.
 pub type ParquetOffsetIndex = Vec<Vec<Vec<PageLocation>>>;
 
-/// Global Parquet metadata.
+/// Global Parquet metadata, including [`FileMetaData`], [`RowGroupMetaData`].
+///
+/// This structure is stored in the footer of Parquet files, in the format
+/// defined by [`parquet.thrift`]. It contains:
+///
+/// * File level metadata: [`FileMetaData`]
+/// * Row Group level metadata: [`RowGroupMetaData`]
+/// * (Optional) "Page Index": [`ParquetColumnIndex`]

Review Comment:
   Isn't column index here? Page Index includes column index and offset index?



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