fix duckdb#6466 convert datetime with tzinfo to a timestamptz instead of timestamp

Author: Tishj

tools/pythonpkg/src/python_objects.cpp

@@ -251,6 +251,7 @@ Value PyDateTime::ToDuckValue() {
 		// Need to subtract the UTC offset, so we invert the interval
 		utc_offset = Interval::Invert(utc_offset);
 		timestamp = Interval::Add(timestamp, utc_offset);
+		return Value::TIMESTAMPTZ(timestamp);
 	}
 	return Value::TIMESTAMP(timestamp);
 }

tools/pythonpkg/tests/fast/pandas/test_datetime_time.py

@@ -69,3 +69,19 @@ def test_pandas_datetime_overflow(self):
 
         with pytest.raises(duckdb.ConversionException):
             res = duckdb_con.execute("select * from test").df()
+
+    def test_timezone_datetime(self):
+        module = pytest.importorskip("datetime")
+        timezone = module.timezone
+        datetime = module.datetime
+
+        con = duckdb.connect()
+
+        dt = datetime.now(timezone.utc).replace(microsecond=0)
+
+        original = dt
+        stringified = str(dt)
+
+        original_res = con.execute('select ?::TIMESTAMPTZ', [original]).fetchone()
+        stringified_res = con.execute('select ?::TIMESTAMPTZ', [stringified]).fetchone()
+        assert original_res == stringified_res