Tweak to bug fix for fetching multiple consecutive nulls in a data

frame.

Author: anthony-tuininga

src/oracledb/interchange/nanoarrow_bridge.pyx

@@ -342,13 +342,13 @@ cdef class OracleArrowArray:
             ArrowBitmap *bitamp
         if array is None:
             array = self
+        index = array.arrow_array.length - 1
         bitmap = ArrowArrayValidityBitmap(array.arrow_array)
         if bitmap != NULL and bitmap.buffer.data != NULL:
             as_bool = ArrowBitGet(bitmap.buffer.data, index)
             if not as_bool:
                 self.append_null()
                 return 0
-        index = array.arrow_array.length - 1
         if array.arrow_type in (NANOARROW_TYPE_INT64, NANOARROW_TYPE_TIMESTAMP):
             data_buffer = ArrowArrayBuffer(array.arrow_array, 1)
             as_int64 = <int64_t*> data_buffer.data

tests/test_8000_dataframe.py

@@ -638,6 +638,8 @@ def test_8027(self):
         self.__check_interop()
         ora_df = self.conn.fetch_df_all(
             """
+            select to_date('2025-06-12', 'YYYY-MM-DD') as data from dual
+            union all
             select to_date(null) as data from dual
             union all
             select to_date(null) as data from dual
@@ -656,6 +658,7 @@ def test_8027(self):
             """
         )
         data = [
+            (datetime.datetime(2025, 6, 12),),
             (None,),
             (None,),
             (None,),

tests/test_8100_dataframe_async.py

@@ -591,6 +591,8 @@ async def test_8123(self):
         self.__check_interop()
         ora_df = await self.conn.fetch_df_all(
             """
+            select to_date('2025-06-12', 'YYYY-MM-DD') as data from dual
+            union all
             select to_date(null) as data from dual
             union all
             select to_date(null) as data from dual
@@ -609,6 +611,7 @@ async def test_8123(self):
             """
         )
         data = [
+            (datetime.datetime(2025, 6, 12),),
             (None,),
             (None,),
             (None,),