Adds a data tap on the output of a component in a package data flow, for an instance of the execution.
catalog.add_data_tap [ @execution_id = ] execution_id , [ @task_package_path = ] task_package_path , [ @dataflow_path_id_string = ] dataflow_path_id_string , [ @data_filename = ] data_filename , [ @max_rows = ] max_rows , [ @data_tap_id = ] data_tap_id OUTPUT
[ @execution_id = ] execution_id
The execution ID for the execution that contains the package. The execution_id is a bigint.
[ @task_package_path = ] task_package_path
The package path for the data flow task. The PackagePath property for the data flow task specifies the path. The path is case-sensitive. To locate the package path, in SQL Server Data Tools right-click the Data Flow task, and then click Properties. The PackagePath property appears in the Properties window.
The task_package_path is a nvarchar(max).
[ @dataflow_path_id_string = ] dataflow_path_id_string
The identification string for the data flow path. A path connects two data flow components. The IdentificationString property for the path specifies the string.
To locate the identification string, in SQL Server Data Tools right-click the path between two data flow components and then click Properties. The IdentificationString property appears in the Properties window.
The dataflow_path_id_string is a nvarchar(4000).
[ @data_filename = ] data_filename
The name of the file that stores the tapped data. If the data flow task executes inside a Foreach Loop or a For Loop container, separate files store tapped data for each iteration of the loop. Each file is prefixed with a number that corresponds to an iteration.
By default, the file is stored in the <drive>:\Program Files\Microsoft SQL Server\130\DTS\DataDumps folder.
The data_filename is a nvarchar(4000).
[ @max_rows = ] max_rows
The number of rows that are captured during the data tap. If this value is not specified, all rows are captured. The max_rows is an int.
[ @data_tap_id = ] data_tap_id
Returns the ID of the data tap. The data_tap_id is a bigint.
In the following example, a data tap is created on the data flow path,
'Paths[OLE DB Source.OLE DB Source Output], in the data flow task,
\Package\Data Flow Task. The tapped data is stored in the
output0.txt file in the DataDumps folder (<drive>:\Program Files\Microsoft SQL Server\130\DTS\DataDumps).
Declare @execution_id bigint Exec SSISDB.Catalog.create_execution @folder_name='Packages',@project_name='SSISPackages', @package_name='Package.dtsx',@reference_id=Null, @use32bitruntime=False, @execution_id=@execution_id OUTPUT Exec SSISDB.Catalog.set_execution_parameter_value @execution_id,50, 'LOGGING_LEVEL', 0 Exec SSISDB.Catalog.add_data_tap @execution_id, @task_package_path='\Package\Data Flow Task', @dataflow_path_id_string = 'Paths[OLE DB Source.OLE DB Source Output]', @data_filename = 'output0.txt' Exec SSISDB.Catalog.start_execution @execution_id
To add data taps, the instance of the execution must be in the created state (a value of 1 in the status column of the catalog.operations (SSISDB Database)view) . The state value changes once you run the execution. You can create an execution by calling catalog.create_execution (SSISDB Database).
The following are considerations for the add_data_tap stored procedure.
If an execution contains a parent package and one or more child packages, you need to add a data tap for each package that you want to tap data for.
If a package contains more than one data flow task with the same name, the task_package_path uniquely identifies the data flow task that contains the component output that is tapped.
When you add data tap, it is not validated before the package is run.
It is recommended that you limit the number of rows that are captured during the data tap, to avoid generating large data files. If the machine on which the stored procedure is executed, runs out of storage space for the data files, the package stops running and an error message is written to a log.
Running the add_data_tap stored procedure impacts the performance of the package. It is recommended that you run the stored procedure only to troubleshoot data issues.
To access the file that stores the tapped data, you must be an administrator on the machine on which the stored procedure is run. You must also be the user who started the execution that contains the package with the data tap.
When the stored procedure fails, it throws an error.
This stored procedure requires one of the following permissions:
MODIFY permissions on the instance of execution
Membership to the ssis_admin database role
Membership to the sysadmin server role
Errors and Warnings
The following list describes conditions that cause the stored procedure to fail.
The user does not have MODIFY permissions.
The data tap for the specified component, in the specified package, has already been added.
The value specified for the number of rows to capture, is not valid.
Blog entry, SSIS 2012: A Peek to Data Taps, on rafael-salas.com.