fix(amazon): Support AWS China region endpoints in RedshiftSQLHook OpenLineage identifier parsing

providers/amazon/src/airflow/providers/amazon/aws/hooks/redshift_sql.py

@@ -285,6 +285,10 @@ def _get_identifier_from_hostname(self, hostname: str) -> str:
         parts = hostname.split(".")
         if hostname.endswith("amazonaws.com") and len(parts) == 6:
             return f"{parts[0]}.{parts[2]}"
+        # AWS China regions use the amazonaws.com.cn endpoint suffix
+        # e.g. my-cluster.id.cn-north-1.redshift.amazonaws.com.cn (7 parts vs 6 for global)
+        if hostname.endswith("amazonaws.com.cn") and len(parts) == 7:
+            return f"{parts[0]}.{parts[2]}"
         self.log.debug(
             """Could not parse identifier from hostname '%s'.
             You are probably using IP to connect to Redshift cluster.

providers/amazon/tests/unit/amazon/aws/hooks/test_redshift_sql.py

@@ -297,6 +297,18 @@ def test_get_conn_iam_does_not_mutate_connection(self, mock_connect, mock_aws_ho
                 {},
                 "1.2.3.4",
             ),
+            # test with AWS China region endpoint (provisioned cluster)
+            (
+                "cluster_identifier_from_host.id.cn-north-1.redshift.amazonaws.com.cn",
+                {"iam": True},
+                "cluster_identifier_from_host.cn-north-1",
+            ),
+            # test with AWS China region endpoint (serverless)
+            (
+                "workgroup-name.account-id.cn-northwest-1.redshift-serverless.amazonaws.com.cn",
+                {"iam": True},
+                "workgroup-name.cn-northwest-1",
+            ),
         ],
     )
     def test_get_openlineage_redshift_authority_part(