MRS Spark SQL

Functions

The MRS Spark SQL node is used to execute a predefined SparkSQL statement on MRS.

Parameters

Table 1, Table 2, and Table 3 describe the parameters of the MRS Spark SQLnode node.

Table 1 Parameters of MRS Spark SQL nodes

Parameter

Mandatory

Description

SQL Script

Yes

Path of a script to be executed. If no script is available, create and develop a script by referring to Creating a Script and Developing an SQL Script.

Data Connection

Yes

Data connection that is configured in the SQL script. The value can be changed.

Database

Yes

Database that is configured in the SQL script. The value can be changed.

Script Parameter

No

If the associated SQL script uses a parameter, the parameter name is displayed. Set the parameter value in the text box next to the parameter name. The parameter value can be an EL expression.

If the parameters of the associated SQL script are changed, click image1 to refresh the parameters.

Program Parameter

No

Used to configure optimization parameters such as threads, memory, and vCPUs for the job to optimize resource usage and improve job execution performance.

Note

This parameter is mandatory if the cluster version is MRS 1.8.7 or later than MRS 2.0.1.

For details about the program parameters of MRS SparkSQL jobs, see Managing an Existing Cluster > Job Management > Running a SparkSQL Job in the MapReduce Service User Guide.

Node Name

Yes

Name of the SQL script. The value can be changed.

Node name. It contains 1 to 64 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed.

Note

The node name cannot contain Chinese characters or more than 64 characters. If the node name does not meet requirements, the MRS job will fail to be submitted.

Table 2 Advanced parameters

Parameter

Mandatory

Description

Node Status Polling Interval (s)

Yes

Specifies how often the system check completeness of the node task. The value ranges from 1 to 60 seconds.

Max. Node Execution Duration

Yes

Execution timeout interval for the node. If retry is configured and the execution is not complete within the timeout interval, the node will not be retried and is set to the failed state.

Retry upon Failure

Yes

Indicates whether to re-execute a node task if its execution fails. Possible values:

  • Yes: The node task will be re-executed, and the following parameters must be configured:

    • Maximum Retries

    • Retry Interval (seconds)

  • No: The node task will not be re-executed. This is the default setting.

Note

If Timeout Interval is configured for the node, the node will not be executed again after the execution times out. Instead, the node is set to the failure state.

Failure Policy

Yes

Operation that will be performed if the node task fails to be executed. Possible values:

  • End the current job execution plan: stops running the current job. The job instance status is Failed.

  • Go to the next node: ignores the execution failure of the current node. The job instance status is Failure ignored.

  • Suspend current job execution plan: suspends running the current job. The job instance status is Waiting.

  • Suspend execution plans of the subsequent nodes: stops running subsequent nodes. The job instance status is Failed.

Table 3 Lineage

Parameter

Description

Input

Add

Click Add. In the Type drop-down list, select the type to be created. The value can be DWS, OBS, CSS, HIVE, DLI, or CUSTOM.

  • DWS

    • Connection Name: Click image2. In the displayed dialog box, select a DWS data connection.

    • Database: Click image3. In the displayed dialog box, select a DWS database.

    • Schema: Click image4. In the displayed dialog box, select a DWS schema.

    • Table Name: Click image5. In the displayed dialog box, select a DWS table.

  • OBS

    • Path: Click image6. In the displayed dialog box, select an OBS path.

  • CSS

    • Cluster Name: Click image7. In the displayed dialog box, select a CSS cluster.

    • Index: Enter a CSS index name.

  • HIVE

    • Connection Name: Click image8. In the displayed dialog box, select a HIVE data connection.

    • Database: Click image9. In the displayed dialog box, select a HIVE database.

    • Table Name: Click image10. In the displayed dialog box, select a HIVE table.

  • CUSTOM

    • Name: Enter a name of the CUSTOM type.

    • Attribute: Enter an attribute of the CUSTOM type. You can add more than one attribute.

  • DLI

    • Connection Name: Click image11. In the displayed dialog box, select a DLI data connection.

    • Database: Click image12. In the displayed dialog box, select a DLI database.

    • Table Name: Click image13. In the displayed dialog box, select a DLI table.

OK

Click OK to save the parameter settings.

Cancel

Click Cancel to cancel the parameter settings.

Modify

Click image14 to modify the parameter settings. After the modification, save the settings.

Delete

Click image15 to delete the parameter settings.

View Details

Click image16 to view details about the table created based on the input lineage.

Output

Add

Click Add. In the Type drop-down list, select the type to be created. The value can be DWS, OBS, CSS, HIVE, DLI, or CUSTOM.

  • DWS

    • Connection Name: Click image17. In the displayed dialog box, select a DWS data connection.

    • Database: Click image18. In the displayed dialog box, select a DWS database.

    • Schema: Click image19. In the displayed dialog box, select a DWS schema.

    • Table Name: Click image20. In the displayed dialog box, select a DWS table.

  • OBS

    • Path: Click image21. In the displayed dialog box, select an OBS path.

  • CSS

    • Cluster Name: Click image22. In the displayed dialog box, select a CSS cluster.

    • Index: Enter a CSS index name.

  • HIVE

    • Connection Name: Click image23. In the displayed dialog box, select a HIVE data connection.

    • Database: Click image24. In the displayed dialog box, select a HIVE database.

    • Table Name: Click image25. In the displayed dialog box, select a HIVE table.

  • CUSTOM

    • Name: Enter a name of the CUSTOM type.

    • Attribute: Enter an attribute of the CUSTOM type. You can add more than one attribute.

  • DLI

    • Connection Name: Click image26. In the displayed dialog box, select a DLI data connection.

    • Database: Click image27. In the displayed dialog box, select a DLI database.

    • Table Name: Click image28. In the displayed dialog box, select a DLI table.

OK

Click OK to save the parameter settings.

Cancel

Click Cancel to cancel the parameter settings.

Modify

Click image29 to modify the parameter settings. After the modification, save the settings.

Delete

Click image30 to delete the parameter settings.

View Details

Click image31 to view details about the table created based on the output lineage.