sys.dm_pdw_exec_sessions (Transact-SQL)
Applies to: 
Azure Synapse Analytics
Analytics Platform System (PDW)
Holds information about all sessions currently or recently open on the appliance. It lists one row per session.
Note
This syntax is not supported by serverless SQL pool in Azure Synapse Analytics. For serverless SQL pool use sys.dm_exec_sessions.
| Column Name | Data Type | Description | Range |
|---|---|---|---|
session_id |
nvarchar(32) | The ID of the current query or the last query run (if the session is TERMINATED and the query was executing at time of termination). Key for this view. | Unique across all sessions in the system. |
status |
nvarchar(10) | For current sessions, identifies whether the session is currently active or idle. For past sessions, the session status might show closed or killed (if the session was forcibly closed). | ACTIVE, CLOSED, IDLE, TERMINATED |
request_id |
nvarchar(32) | The ID of the current query or last query run. | Unique across all requests in the system. NULL if none has been run. |
security_id |
varbinary(85) | Security ID of the principal running the session. | |
login_name |
nvarchar(128) | The login name of the principal running the session. | Any string conforming to the user naming conventions. |
login_time |
datetime | Date and time at which the user logged in and this session was created. | Valid datetime before current time. |
query_count |
int | Captures the number of queries/requests this session has run since creation. | Greater than or equal to 0. |
is_transactional |
bit | Captures whether a session is currently within a transaction or not. | 0 for auto-commit, 1 for transactional. |
client_id |
nvarchar(255) | Captures client information for the session. IPv6 address indicates private endpoint is used. | Any valid string. |
app_name |
nvarchar(255) | Captures application name information optionally set as part of the connection process. | Any valid string. |
sql_spid |
int | The IDs column contains closed SPIDs. |
For information about the maximum rows retained by this view, see the Metadata section in the Capacity limits topic.
Permissions
Requires the VIEW SERVER STATE permission.
Examples
To find a count of active sessions:
SELECT active_count = COUNT(session_Id)
FROM sys.dm_pdw_exec_sessions
WHERE status = 'ACTIVE';
To find sessions that have been open for longer than 10 minutes:
SELECT *, session_duration_s = DATEDIFF (s, login_time, getdate() )
FROM sys.dm_pdw_exec_sessions
WHERE DATEDIFF (s, login_time, getdate() ) > 600; -- 10 minutes