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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/10/25 14:25:00 UTC
[GitHub] [arrow-rs] Ted-Jiang opened a new issue, #2925: Fail at rowSelection `and_then` method
Ted-Jiang opened a new issue, #2925:
URL: https://github.com/apache/arrow-rs/issues/2925
**Describe the bug**
```
let a = RowSelection::from(vec![
RowSelector::select(3),
RowSelector::skip(33),
RowSelector::select(3),
RowSelector::skip(33),
]);
let b = RowSelection::from(vec![RowSelector::select(36), RowSelector::skip(36)]);
assert_eq!(
a.and_then(&b).selectors,
vec![RowSelector::select(3), RowSelector::skip(69)]
);
```
got
```
---- arrow::arrow_reader::selection::tests::test_and_2 stdout ----
thread 'arrow::arrow_reader::selection::tests::test_and_2' panicked at 'called `Option::unwrap()` on a `None` value', parquet/src/arrow/arrow_reader/selection.rs:233:38
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
```
**To Reproduce**
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**Expected behavior**
<!--
A clear and concise description of what you expected to happen.
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**Additional context**
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[GitHub] [arrow-rs] viirya commented on issue #2925: Fail at rowSelection `and_then` method
Posted by GitBox <gi...@apache.org>.
viirya commented on issue #2925:
URL: https://github.com/apache/arrow-rs/issues/2925#issuecomment-1292353211
Hmm, if `and_then` takes the conjunction from two row selections, why `b` should be only 6 long? It looks like `b` must be in the selection range of `a`.
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[GitHub] [arrow-rs] alamb commented on issue #2925: Fail at rowSelection `and_then` method
Posted by GitBox <gi...@apache.org>.
alamb commented on issue #2925:
URL: https://github.com/apache/arrow-rs/issues/2925#issuecomment-1294979645
`label_issue.py` automatically added labels {'parquet'} from #2924
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[GitHub] [arrow-rs] tustvold commented on issue #2925: Fail at rowSelection `and_then` method
Posted by GitBox <gi...@apache.org>.
tustvold commented on issue #2925:
URL: https://github.com/apache/arrow-rs/issues/2925#issuecomment-1291100678
This appears to be caused by the second row selector being longer than expected, `a` only selects 6 rows and so `b` should only be 6 long, instead of 72.
This is a bug that should be fixed, but shouldn't impact correctness
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[GitHub] [arrow-rs] viirya closed issue #2925: Fail at rowSelection `and_then` method
Posted by GitBox <gi...@apache.org>.
viirya closed issue #2925: Fail at rowSelection `and_then` method
URL: https://github.com/apache/arrow-rs/issues/2925
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