[GitHub] [arrow-rs] tustvold commented on a diff in pull request #4871: Facilitate parallel parquet writing

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

tustvold commented on code in PR #4871:
URL: https://github.com/apache/arrow-rs/pull/4871#discussion_r1338849142


##########
parquet/src/arrow/arrow_writer/levels.rs:
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@@ -558,10 +564,25 @@ pub(crate) struct LevelInfo {
 
     /// The maximum repetition for this leaf column
     max_rep_level: i16,
+
+    /// The arrow array
+    array: ArrayRef,

Review Comment:
   This is the major meat of the PR, by bundling the leaf array with the corresponding metadata, we get an API that is very amenable to parallelization



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