HuaHuaY commented on code in PR #49125:
URL: https://github.com/apache/arrow/pull/49125#discussion_r2786359812
##########
cpp/src/parquet/arrow/arrow_schema_test.cc:
##########
@@ -681,6 +707,36 @@ TEST_F(TestConvertParquetSchema, ParquetLists) {
arrow_fields.push_back(::arrow::field("my_list", arrow_list,
/*nullable=*/true));
}
+ // List<Map<String, String>> in two-level list encoding:
+ //
+ // optional group my_list (LIST) {
+ // repeated group array (MAP) {
+ // repeated group key_value {
+ // required binary key (STRING);
+ // optional binary value (STRING);
+ // }
+ // }
+ // }
Review Comment:
I think it's not in backward-compatibility rules too. We may add it into
document first.
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