test: Fix insert rowcount (#242)

Author: ptiurin

src/firebolt/async_db/cursor.py

@@ -303,10 +303,12 @@ def _row_set_from_response(
             # Skip parsing floats to properly parse them later
             query_data = response.json(parse_float=str)
             rowcount = int(query_data["rows"])
-            descriptions = [
+            descriptions: Optional[List[Column]] = [
                 Column(d["name"], parse_type(d["type"]), None, None, None, None, None)
                 for d in query_data["meta"]
             ]
+            if not descriptions:
+                descriptions = None
             statistics = Statistics(**query_data["statistics"])
             # Parse data during fetch
             rows = query_data["data"]

tests/integration/dbapi/async/test_queries_async.py

@@ -388,9 +388,9 @@ async def test_multi_statement_query(connection: Connection) -> None:
                 "SELECT * FROM test_tb_async_multi_statement;"
                 "SELECT * FROM test_tb_async_multi_statement WHERE i <= 1"
             )
-            == -1
+            == 1  # Insert always returns 1 row with num of rows modified
         ), "Invalid row count returned for insert"
-        assert c.rowcount == -1, "Invalid row count"
+        assert c.rowcount == 1, "Invalid row count"
         assert c.description is None, "Invalid description"
 
         assert await c.nextset()

tests/integration/dbapi/sync/test_queries.py

@@ -333,9 +333,9 @@ def test_multi_statement_query(connection: Connection) -> None:
                 "SELECT * FROM test_tb_multi_statement;"
                 "SELECT * FROM test_tb_multi_statement WHERE i <= 1"
             )
-            == -1
+            == 1  # Insert always returns 1 row with num of rows modified
         ), "Invalid row count returned for insert"
-        assert c.rowcount == -1, "Invalid row count"
+        assert c.rowcount == 1, "Invalid row count"
         assert c.description is None, "Invalid description"
 
         assert c.nextset()