sdf-jkl commented on code in PR #9118:
URL: https://github.com/apache/arrow-rs/pull/9118#discussion_r2718386551
##########
parquet/src/arrow/push_decoder/reader_builder/mod.rs:
##########
@@ -588,6 +582,23 @@ impl RowGroupReaderBuilder {
&mut self.buffers,
)?;
+ // before plan is build below
+ // check if plan is bitmask and if it is, put it in a variable
+ let page_offsets = if plan_builder.resolve_selection_strategy()
+ == RowSelectionStrategy::Mask
+ && plan_builder.selection().is_some_and(|selection| {
+ selection.requires_page_aware_mask(
+ &self.projection,
+ self.row_group_offset_index(row_group_idx),
+ )
+ }) {
+ self.row_group_offset_index(row_group_idx)
+ .and_then(|columns| columns.first())
Review Comment:
Wouldn't the page offsets be same for every column?
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