Amazon Redshift will no longer support the creation of new Python UDFs starting Patch 198. Existing Python UDFs will continue to function until June 30, 2026. For more information, see the [ blog post ](https://aws.amazon.com/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/). 

# SYS\_DATASHARE\_CROSS\_REGION\_USAGE
<a name="r_SYS_DATASHARE_CROSS_REGION_USAGE"></a>

Use the SYS\_DATASHARE\_CROSS\_REGION\_USAGE view to get a summary of cross-Region data transferred usage caused by cross-Region datasharing query. SYS\_DATASHARE\_CROSS\_REGION\_USAGE aggregates details at the segment level.

SYS\_DATASHARE\_CROSS\_REGION\_USAGE is visible only to superusers. For more information, see [Visibility of data in system tables and views](cm_chap_system-tables.md#c_visibility-of-data).

## Table columns
<a name="r_SYS_DATASHARE_CROSS_REGION_USAGE-table-rows"></a>


| Column name  | Data type  | Description  | 
| --- | --- | --- | 
| query\_id | integer | The ID of the query. Use this value to join other system tables and views. | 
| child\_query\_sequence | integer | The sequence of the rewritten user query, starting with 1. | 
| segment\_id | bigint | The number of the segment. A query consists of multiple segments, and each segment consists of one or more steps. | 
| start\_time | time | The time in UTC that the data transfer began. | 
| end\_time | time | The time in UTC that the data transfer ended. | 
| transferred\_data | bigint | The number of bytes of data transferred from a producer Region to a consumer Region. | 
| source\_region | char(25) | The producer Region that the query transferred data from. | 

## Sample queries
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The following example shows a SYS\_DATASHARE\_CROSS\_REGION\_USAGE view.

```
SELECT query_id, segment_id, transferred_data, source_region
from sys_datashare_cross_region_usage
where query_id = pg_last_query_id()
order by query_id, segment_id;

  query_id | segment_id | transferred_data | source_region 
-----------+------------+------------------+---------------
    200048 |          2 |          4194304 |    us-west-1  
    200048 |          2 |          4194304 |    us-east-2
```