XiangpengHao commented on code in PR #7850:
URL: https://github.com/apache/arrow-rs/pull/7850#discussion_r2180914768
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parquet/src/arrow/array_reader/builder.rs:
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@@ -39,6 +42,14 @@ pub struct ArrayReaderBuilder<'a> {
row_groups: &'a dyn RowGroups,
}
+/// Cache options containing projection mask, cache, and role
+#[derive(Clone)]
+pub struct CacheOptions<'a> {
+ pub projection_mask: &'a ProjectionMask,
+ pub cache: Arc<Mutex<RowGroupCache>>,
Review Comment:
Practically there's no contention because there's not parallelism in
decoding one row group. we add mutex here because we need to use Arc.
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