tustvold commented on a change in pull request #1477:
URL: https://github.com/apache/arrow-rs/pull/1477#discussion_r833585589
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File path: parquet/src/arrow/levels.rs
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@@ -757,7 +757,10 @@ impl LevelInfo {
/// Given a level's information, calculate the offsets required to index
an array correctly.
pub(crate) fn filter_array_indices(&self) -> Vec<usize> {
Review comment:
This function only makes sense for writing leaf arrays, and so I worry
that whilst this may fix the case of a List of nulls, it will behave
erratically if given a list of non-nulls. I'll see if I can work out why this
method is getting called at all
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