burmecia opened a new pull request, #1347:
URL: https://github.com/apache/iceberg-rust/pull/1347
## Which issue does this PR close?
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N/A
## What changes are included in this PR?
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This PR is to fix a bug in checking if a leaf column is root column in
Parquet schema. The current solution is to compare the leaf column's index with
root column's index, this is not reliable as the column index may not
correspond exactly after a nested column. For example,
- col A: String
- col B: Map
- key B.K: String
- value B.V: String
- col C: String
For column A, B.K and B.V, the currently logic works well. It won't return
error for A, but will do for B.K and B.V, this is correct. But for column C, it
will return error as its leaf column index (3) will not match root column index
(2), this is incorrect.
I think `get_column_root().is_group()` may be a more reliable way to check
in this situation. Just to check if a leaf column's root column is a group
column, we can determine a leaf column is actually on the root.
## Are these changes tested?
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Yes
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