pitrou commented on code in PR #45411:
URL: https://github.com/apache/arrow/pull/45411#discussion_r2010363506
##########
docs/source/python/parquet.rst:
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@@ -739,6 +739,37 @@ An example encryption configuration:
},
)
+.. note::
+ Encrypting columns that have nested fields (for instance struct, map, or
even list data types)
+ require configuring column keys for the inner fields, not the column itself.
+ Configuring a column key for the column itself causes this error (here
column name is ``col``):
+
+ .. code-block::
+
+ OSError: Encrypted column col not in file schema
+
+An example encryption configuration for columns with nested fields, where
+all of the columns will be encrypted with the key identified by
``column_key_id``:
Review Comment:
```suggestion
An example encryption configuration for columns with nested fields, where
all columns will be encrypted with the same key identified by
``column_key_id``:
```
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