从补丁 198 开始，Amazon Redshift 将不再支持创建新的 Python UDF。现有的 Python UDF 将继续正常运行至 2026 年 6 月 30 日。有关更多信息，请参阅[博客文章](https://aws.amazon.com/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/)。

# SVV\$1TRANSACTIONS
<a name="r_SVV_TRANSACTIONS"></a>

记录当前锁定到数据库中的表的事务的相关信息。使用 SVV\$1TRANSACTIONS 视图可标识未结事务和锁定争用问题。有关锁定的更多信息，请参阅[管理并发写入操作](c_Concurrent_writes.md)和[LOCK](r_LOCK.md)。

SVV\$1TRANSACTIONS 对所有用户可见。超级用户可以查看所有行；普通用户只能查看其自己的数据。有关更多信息，请参阅 [系统表和视图中的数据可见性](cm_chap_system-tables.md#c_visibility-of-data)。

## 表列
<a name="SVV_TRANSACTIONS-table-columns"></a>

[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/zh_cn/redshift/latest/dg/r_SVV_TRANSACTIONS.html)

## 示例查询
<a name="SVV_TRANSACTIONS-sample-queries"></a>

以下命令显示所有活动事务和每个事务请求的锁定。

```
select * from svv_transactions;

 txn_                                                                                 lockable_     
 owner | txn_db |  xid   |  pid  |         txn_start          |      lock_mode      | object_type    | relation | granted
-------+--------+--------+-------+----------------------------+---------------------+----------------+----------+---------
 root  | dev    | 438484 | 22223 | 2016-03-02 18:42:18.862254 | AccessShareLock     | relation       |   100068 | t
 root  | dev    | 438484 | 22223 | 2016-03-02 18:42:18.862254 | ExclusiveLock       | transactionid  |          | t
 root  | tickit | 438490 | 22277 | 2016-03-02 18:42:48.084037 | AccessShareLock     | relation       |    50860 | t
 root  | tickit | 438490 | 22277 | 2016-03-02 18:42:48.084037 | AccessShareLock     | relation       |    52310 | t
 root  | tickit | 438490 | 22277 | 2016-03-02 18:42:48.084037 | ExclusiveLock       | transactionid  |          | t
 root  | dev    | 438505 | 22378 | 2016-03-02 18:43:27.611292 | AccessExclusiveLock | relation       |   100068 | f
 root  | dev    | 438505 | 22378 | 2016-03-02 18:43:27.611292 | RowExclusiveLock    | relation       |    16688 | t
 root  | dev    | 438505 | 22378 | 2016-03-02 18:43:27.611292 | AccessShareLock     | relation       |   100064 | t
 root  | dev    | 438505 | 22378 | 2016-03-02 18:43:27.611292 | AccessExclusiveLock | relation       |   100166 | t
 root  | dev    | 438505 | 22378 | 2016-03-02 18:43:27.611292 | AccessExclusiveLock | relation       |   100171 | t
 root  | dev    | 438505 | 22378 | 2016-03-02 18:43:27.611292 | AccessExclusiveLock | relation       |   100190 | t
 root  | dev    | 438505 | 22378 | 2016-03-02 18:43:27.611292 | ExclusiveLock       | transactionid  |          | t
(12 rows)

(12 rows)
```