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Store Sensor Data in SAP HANA in SAP Data Intelligence, Trial Edition

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Store Sensor Data in SAP HANA in SAP Data Intelligence, Trial Edition

Store Sensor Data in SAP HANA in SAP Data Intelligence, Trial Edition

June 4, 2020
Created by
October 19, 2018
Use SAP HANA to store sensor data by using SAP Data Intelligence, Trial Edition.

You will learn

  • How to store the data in SAP HANA from Google Cloud Storage or AWS S3 or Microsoft WASB
  • How to use a SAP HANA Client Operator
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Please note here in this tutorial GCP refers to Google Cloud platform and AWS refers to Amazon Web Services and Azure refers to Microsoft Azure.

Step 1: Add SAP HANA Client operator

The SAP HANA Client Operator works as a client for the SAP HANA. This operator executes SQL statements and inserts CSV or JSON data into an SAP HANA instance. It supports three fundamental operations:
- Executing arbitrary SQL code.
- Executing prepared statements.
- Inserting data into a predefined table.
You can use a single HANA Client operator to perform all three operations, since the input ports work independently from one another.

You can get more details of operator by clicking the Documentation icon.

Open the pipeline which you have created in the previous tutorial (test.myFirstPipeline), in the modelling environment.

  1. Add a SAP HANA Client operator and a 1:2 Multiplexer operator.

    • Add a SAP HANA Client operator.
    • Add a 1:2 Multiplexer operator.
    • Remove the connection between Read File and Wiretap.
    • Connect the file out port of the Read File (this is an unused port in the Read File operator) to the 1:2 Multiplexer operator.
    • Connect one of the out port of 1:2 Multiplexer operator to Wiretap in port.
    • Connect the other out port of the 1:2 Multiplexer to the filename in port of the SAP HANA Client data input.
    Add more operators
  2. In the popup dialog, select the From File, click OK.

    Select conversion
  3. Right click Write File operator, open the configuration panel and change the following property:

    Field Name              Value
    path sensordata/HANA_file<counter>.txt

The Write File operator will write the received data to files in the /sensordata directory in the specified GCS or AWS S3 bucket or Azure container. The files follow the scheme HANA_file<counter>.txt (where counter is an incremental integer).

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Step 2: Configure the SAP HANA Client operator

You need to provide the HANA Connection, Table name along with its Schema, to the SAP HANA Client. The SAP HANA Client gets the data from data input port then inserts into table.

Now you would be configuring the second operator that you have added - SAP HANA Client. Open the configuration window for the operator.

Provide the configuration Parameter values as follows:

Parameter                                              Value
Connection use Configuration Manager as Configuration type and select HANA_LOCALHOST as Connection ID
Table columns [{"name":"counter","type":"INTEGER"},{"name":"deviceid","type":"INTEGER"},{"name":"temperature","type":"DOUBLE"},{"name":"humidity","type":"DOUBLE"},{"name":"co2","type":"DOUBLE"},{"name":"co","type":"DOUBLE"},{"name":"lpg","type":"DOUBLE"},{"name":"smoke","type":"DOUBLE"},{"name":"presence","type":"INTEGER"},{"name":"light","type":"DOUBLE"},{"name":"sound","type":"DOUBLE"}]
Insert mode INSERT
Table initialization Create
Table type Column
Terminate on error False

Please note columns also can be added manually. You can use icon besides Table columns.

Edit Table Columns

To specify connection details you can utilize the connections established in the Configuration Manager.

To re-use the Configuration Manager connections, click on the Connection input field and select Configuration Type as Configuration Manager and select the desired connection from the Connection ID dropdown box which here should be HANA_LOCALHOST.

Configuration Details

Save the graph.

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Step 3: Execute the data pipeline

Go to the SAP Data Intelligence Modeler and click Run to execute the pipeline. When the Status tab indicates that the pipeline is running, use the context menu Open UI of the Wiretap operator to see the generated sensor data.

The longer the pipeline runs, the more files and rows are generated. Therefore, after a while stop the pipeline execution.

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Step 4: Check the output in HANA from Browse Connections

For GCS open and navigate to the /sensordata/ directory.

For AWS open and navigate to Search for Buckets > Your Bucket name > sensordata folder.

For Azure open and navigate to Storage accounts > filter your Storage account > Blob service > click Blob > Your Container name > sensordata folder.

You can notice that the output files are generated similar to the earlier tutorial in the above mentioned storage buckets.

  1. Now login to the SAP Data Intelligence Launchpad and click on the Metadata Explorer.

  2. Preview Sensor Data

    • Once Metadata Explorer open up, double click on the Browse Connections from the left panel.
    • Select HANA_LOCALHOST.
    • Click on TRIALEDITION.
    • Once you see the table SENSORDATA, click More Actions.
    • Select View Fact Sheets.
    View Fact Sheets
  3. Click the Data Preview, this will display all the sensor data that you have loaded into the HANA table.

Which format do you use to define the columns of HANA table?

Next Steps

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