alamb commented on code in PR #11330:
URL: https://github.com/apache/arrow-rs/pull/11330#discussion_r4189970839
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parquet/src/arrow/push_decoder/reader_builder/mod.rs:
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@@ -317,7 +230,25 @@ impl RowGroupReaderBuilder {
row_selection_policy,
state: Some(RowGroupDecoderState::Finished),
buffers,
- }
+ stages: StageSchedule::new(ProjectionMask::all(), vec![], None),
Review Comment:
This seems like it make an allocation that is immediately discarded
(builder.stages is overwritten a few lines down)
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