alamb commented on code in PR #9374:
URL: https://github.com/apache/arrow-rs/pull/9374#discussion_r2794904424
##########
parquet/src/column/reader.rs:
##########
@@ -309,6 +309,20 @@ where
});
if let Some(rows) = rows {
+ // If there is a pending partial record from a previous
page,
+ // count it before considering the whole-page skip. When
the
+ // next page provides num_rows (e.g. a V2 data page or via
+ // offset index), its records are self-contained, so the
+ // partial from the previous page is complete at this
boundary.
+ if let Some(decoder) = self.rep_level_decoder.as_mut() {
+ if decoder.flush_partial() {
Review Comment:
I made such a file (that triggers the error with a RowSelection): 🤯
https://github.com/apache/arrow-rs/pull/9395
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