adriangb commented on code in PR #9414:
URL: https://github.com/apache/arrow-rs/pull/9414#discussion_r2965818088
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parquet/src/arrow/arrow_reader/mod.rs:
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@@ -430,6 +434,32 @@ impl<T> ArrowReaderBuilder<T> {
..self
}
}
+
+ /// Set a scatter threshold for filter deferral.
Review Comment:
I like this even more now! This is now dealing with selector density,
something that would be hard to do on the datafusion side and is correlated but
not equivalent to overall filter selectivity, which I think is what probably
ends up mattering more for coarser IO patterns and such given object store
range coalescing, pages, etc.
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