| title | description | author | ms.author | ms.date | ms.service | ms.subservice | ms.topic | f1_keywords | helpviewer_keywords | dev_langs | monikerRange | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
sys.dm_tran_session_transactions (Transact-SQL) |
sys.dm_tran_session_transactions returns correlation information for associated transactions and sessions. |
rwestMSFT |
randolphwest |
08/10/2023 |
sql |
system-objects |
reference |
|
|
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>=aps-pdw-2016||=azuresqldb-current||=azure-sqldw-latest||>=sql-server-2016||>=sql-server-linux-2017||=azuresqldb-mi-current |
[!INCLUDE sql-asdb-asdbmi-asa-pdw]
Returns correlation information for associated transactions and sessions.
Note
To call this from [!INCLUDEssazuresynapse-md] or [!INCLUDEssPDW], use the name sys.dm_pdw_nodes_tran_session_transactions. [!INCLUDEsynapse-analytics-od-unsupported-syntax]
| Column name | Data type | Description |
|---|---|---|
| session_id | int | ID of the session under which the transaction is running. |
| transaction_id | bigint | ID of the transaction. |
| transaction_descriptor | binary(8) | Transaction identifier used by [!INCLUDEssNoVersion] when communicating with the client driver. |
| enlist_count | int | Number of active requests in the session working on the transaction. |
| is_user_transaction | bit | 1 = The transaction was initiated by a user request. 0 = System transaction. |
| is_local | bit | 1 = Local transaction. 0 = Distributed transaction or an enlisted bound session transaction. |
| is_enlisted | bit | 1 = Enlisted distributed transaction. 0 = Not an enlisted distributed transaction. |
| is_bound | bit | 1 = The transaction is active on the session via bound sessions. 0 = The transaction is not active on the session via bound sessions. |
| open_transaction_count | int | The number of open transactions for each session. |
| pdw_node_id | int | Applies to: [!INCLUDEssazuresynapse-md], [!INCLUDEssPDW] The identifier for the node that this distribution is on. |
On [!INCLUDEssNoVersion_md] and SQL Managed Instance, requires VIEW SERVER STATE permission.
On SQL Database Basic, S0, and S1 service objectives, and for databases in elastic pools, the server admin account, the Microsoft Entra admin account, or membership in the ##MS_ServerStateReader## server role is required. On all other SQL Database service objectives, either the VIEW DATABASE STATE permission on the database, or membership in the ##MS_ServerStateReader## server role is required.
Requires VIEW SERVER PERFORMANCE STATE permission on the server.
Through bound sessions and distributed transactions, it is possible for a transaction to be running under more than one session. In such cases, sys.dm_tran_session_transactions shows multiple rows for the same transaction_id, one for each session under which the transaction is running. Because of differences in how they are recorded, open_transaction_count may not match sys.dm_exec_sessions.open_transaction_count.
By executing multiple requests in autocommit mode using multiple active result sets (MARS), it is possible to have more than one active transaction on a single session. In such cases, sys.dm_tran_session_transactions shows multiple rows for the same session_id, one for each transaction running under that session.