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://amazonaws-china.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>

Records information about transactions that currently hold locks on tables in the database. Use the SVV\$1TRANSACTIONS view to identify open transactions and lock contention issues. For more information about locks, see [Managing concurrent write operations](c_Concurrent_writes.md) and [LOCK](r_LOCK.md).

SVV\$1TRANSACTIONS is visible to all users. Superusers can see all rows; regular users can see only their own data. 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="SVV_TRANSACTIONS-table-columns"></a>

[\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/en_us/redshift/latest/dg/r_SVV_TRANSACTIONS.html)

## Sample queries
<a name="SVV_TRANSACTIONS-sample-queries"></a>

The following command shows all active transactions and the locks requested by each transaction.

```
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)
```