sys.dm_tran_session_transactions (Transact-SQL)

sys.dm_tran_session_transactions (Transact-SQL)

 

THIS TOPIC APPLIES TO:yesSQL Server (starting with 2008) yesAzure SQL Database yesAzure SQL Data Warehouse yesParallel Data Warehouse

Returns correlation information for associated transactions and sessions.

System_CAPS_noteNote

To call this from Azure SQL Data Warehouse Public Preview or Parallel Data Warehouse, use the name sys.dm_pdw_nodes_tran_session_transactions.


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 SQL Server 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

The number of open transactions for each session.

pdw_node_id

int

The identifier for the node that this distribution is on.

Applies to: Azure SQL Data Warehouse Public Preview, Parallel Data Warehouse

Requires VIEW SERVER 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 will show multiple rows for the same transaction_id, one for each session under which the transaction is running.

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 will show multiple rows for the same session_id, one for each transaction running under that session.

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