Spanner now supports the following new columns in the SPANNER_SYS

## Feature Feature Spanner now supports the following new columns in the `SPANNER_SYS` [oldest active queries](https://cloud.google.com/spanner/docs/introspection/oldest-active-queries)table: * `CLIENT_IP_ADDRESS` * `API_CLIENT_HEADER` * `USER_AGENT_HEADER` * `SERVER_REGION` * `PRIORITY` * `TRANSACTION_TYPE` You can also view these columns in the Spanner **query insights** page on the Google Cloud console. For more information, see[Monitor active queries](https://cloud.google.com/spanner/docs/monitor-active-queries#view-longest-running-queries).