pitrou commented on code in PR #45189:
URL: https://github.com/apache/arrow/pull/45189#discussion_r1906665168


##########
python/pyarrow/_parquet.pxd:
##########
@@ -484,11 +484,9 @@ cdef extern from "parquet/arrow/reader.h" namespace 
"parquet::arrow" nogil:
                               const vector[int]& column_indices,
                               shared_ptr[CTable]* out)
 
-        CStatus GetRecordBatchReader(const vector[int]& row_group_indices,
-                                     const vector[int]& column_indices,
-                                     unique_ptr[CRecordBatchReader]* out)
-        CStatus GetRecordBatchReader(const vector[int]& row_group_indices,
-                                     unique_ptr[CRecordBatchReader]* out)
+        CResult[shared_ptr[CRecordBatchReader]] GetRecordBatchReader(const 
vector[int]& row_group_indices,
+                                                                     const 
vector[int]& column_indices)
+        CResult[shared_ptr[CRecordBatchReader]] GetRecordBatchReader(const 
vector[int]& row_group_indices)

Review Comment:
   `GetRecordBatchReader` on the C++ side returns a `unique_ptr`, not a 
`shared_ptr`, right?



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