tustvold commented on a change in pull request #1477:
URL: https://github.com/apache/arrow-rs/pull/1477#discussion_r833577155
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File path: parquet/src/arrow/levels.rs
##########
@@ -1822,4 +1821,22 @@ mod tests {
// filter_array_indices should return the same indices in this case.
assert_eq!(level1.filter_array_indices(),
level2.filter_array_indices());
}
+
+ #[test]
+ fn test_filter_indices_for_lists() {
Review comment:
FWIW if you're interested in understanding what these repetition levels
actually are there is a good explanation of how the parquet record shredding
works
[here](https://blog.twitter.com/engineering/en_us/a/2013/dremel-made-simple-with-parquet).
I also attempted to explain to myself what this function is doing which may
be helpful - https://github.com/apache/arrow-rs/pull/1185/files#r785357233
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