wgtmac commented on code in PR #43995:
URL: https://github.com/apache/arrow/pull/43995#discussion_r2602467915


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cpp/src/parquet/arrow/arrow_schema_test.cc:
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@@ -727,6 +780,60 @@ TEST_F(TestConvertParquetSchema, 
ParquetRepeatedNestedSchema) {
   ASSERT_NO_FATAL_FAILURE(CheckFlatSchema(arrow_schema));
 }
 
+TEST_F(TestConvertParquetSchema, IllegalParquetNestedSchema) {

Review Comment:
   What confused me is that the legacy two-level list should not have `LIST` 
annotation but the schema above does. In addition, the above schema mixes `MAP` 
and `MAP_KEY_VALUE` annotation for map type.



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