Thin: fixed issue when fetching null values in implicit results.

Author: anthony-tuininga

doc/src/release_notes.rst

@@ -31,6 +31,7 @@ oracledb 1.0.1 (TBD)
 #)  Fixed issue where unconstrained numbers containing integer values would be
     fetched as floats when oracledb.defaults.fetch_lobs was set to `False`.
 #)  Thin: ensure that errors that occur during fetch are detected consistently.
+#)  Thin: fixed issue when fetching null values in implicit results.
 
 
 oracledb 1.0.0 (May 2022)

src/oracledb/impl/thin/messages.pyx

@@ -343,6 +343,7 @@ cdef class MessageWithData(Message):
         cursor_impl._fetch_array_size = cursor.arraysize + cursor.prefetchrows
         cursor_impl._more_rows_to_fetch = True
         cursor_impl._statement._is_query = True
+        cursor_impl._statement._requires_full_execute = True
         self._process_describe_info(buf, cursor, cursor_impl)
         return cursor
 
@@ -581,7 +582,6 @@ cdef class MessageWithData(Message):
                                                                  column_value)
                 cursor_impl = column_value._impl
                 buf.read_ub2(&cursor_impl._statement._cursor_id)
-                cursor_impl._statement._requires_full_execute = True
         elif ora_type_num == TNS_DATA_TYPE_BOOLEAN:
             column_value = buf.read_bool()
         elif ora_type_num == TNS_DATA_TYPE_INTERVAL_DS:

tests/test_3200_features_12_1.py

@@ -407,23 +407,25 @@ def test_3220_implicit_results(self):
                     c2 sys_refcursor;
                 begin
                     open c1 for
-                        select NumberCol
+                        select NullableCol
                         from TestNumbers
                         where IntCol between 3 and 5;
 
                     dbms_sql.return_result(c1);
 
                     open c2 for
-                        select NumberCol
+                        select NullableCol
                         from TestNumbers
                         where IntCol between 7 and 10;
 
                     dbms_sql.return_result(c2);
                 end;""")
         results = self.cursor.getimplicitresults()
         self.assertEqual(len(results), 2)
-        self.assertEqual([n for n, in results[0]], [3.75, 5, 6.25])
-        self.assertEqual([n for n, in results[1]], [8.75, 10, 11.25, 12.5])
+        self.assertEqual([n for n, in results[0]],
+                         [2924207, None, 59797108943])
+        self.assertEqual([n for n, in results[1]],
+                         [1222791080775407, None, 25004854810776297743, None])
 
     def test_3221_implicit_results_no_statement(self):
         "3221 - test getimplicitresults() without executing a statement"