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Applies to: 
SQL Server 2016 (13.x) and later versions
Holds information about all steps that compose a given PolyBase request or query. It lists one row per query step.
| Column Name | Data Type | Description | Range |
|---|---|---|---|
| execution_id | int | execution_id and step_index make up the key for this view. Unique numeric id associated with the request. | See ID in sys.dm_exec_requests (Transact-SQL). |
| step_index | int | The position of this step in the sequence of steps that make up the request. | 0 to (n-1) for a request with n steps. |
| operation_type | nvarchar(128) | Type of the operation represented by this step. | 'MoveOperation','OnOperation','RandomIDOperation','RemoteOperation','ReturnOperation','ShuffleMoveOperation','TempTablePropertiesOperation','DropDiagnosticsNotifyOperation', 'HadoopShuffleOperation', 'HadoopBroadCastOperation', 'HadoopRoundRobinOperation' |
| distribution_type | nvarchar(32) | Where the step is executing. | 'AllComputeNodes','AllDistributions','ComputeNode','Distribution','AllNodes','SubsetNodes','SubsetDistributions','Unspecified'. |
| location_type | nvarchar(32) | Where the step is executing. | 'Compute','Head' or 'DMS'. All data movement steps show 'DMS'. |
| status | nvarchar(32) | Status of this step | 'Pending', 'Running', 'Complete', 'Failed', 'UndoFailed', 'PendingCancel', 'Cancelled', 'Undone', 'Aborted' |
| error_id | nvarchar(36) | Unique id of the error associated with this step, if any | See id of sys.dm_exec_compute_node_errors (Transact-SQL), NULL if no error occurred. |
| start_time | datetime | Time at which the step started execution | Smaller or equal to current time and larger or equal to end_compile_time of the query to which this step belongs. |
| end_time | datetime | Time at which this step completed execution, was cancelled, or failed. | Smaller or equal to current time and larger or equal to start_time, set to NULL for steps currently in execution or queued. |
| total_elapsed_time | int | Total amount of time the query step has been executing, in milliseconds | Between 0 and the difference between end_time and start_time. 0 for queued steps. |
| row_count | bigint | Total number of rows changed or returned by this request | 0 for steps that did not change or return data, number of rows affected otherwise. Set to -1 for DMS steps. |
| command | nvarchar(4000) | Holds the full text of the command of this step. | Any valid request string for a step. Truncated if longer than 4000 characters. |
See Also
PolyBase troubleshooting with dynamic management views
Dynamic Management Views and Functions (Transact-SQL)
Database Related Dynamic Management Views (Transact-SQL)