Create an SAP HANA Database Project

1. From the SAP Business Application Studio Welcome tab, click Start from template Create a new project.

   

2. Choose SAP HANA Database Project and click Start.

   

3. Call the project DM and click Next.

   

4. Keep the module name at the default of db and press Next.

   

5. Clear the Namespace and Schema Name blank. Choose version HANA Cloud and click Next

   

6. Leave all values of the Bind to HDI Container service at their default values and press Finish

   

7. You should see a Generating SAP HANA Database Project message which will remain for a minute or two as the HDI container instance is being created.

   

8. Upon completion of the project generation, you will see a message and the new project is opened in the workspace of the Business Application Studio.

   

This project will combine artifacts from an HDI container and a classic, replicated schema.

You will first create a table to hold data from performance evaluations received by employees and the rating they give the company in terms of satisfaction.

These are sample records that will be stored in this table:

1. Right-click on the src folder, choose New File

   

2. Use the following name

   Text Copy

   data/performance.hdbtable

   

3. This will create both a folder and a file. Paste the following content into the hdbtable file to define a new table:

   SQL Copy

   column table "PERFORMANCE" (
       "ID" INTEGER  unique not null COMMENT 'Employee ID',
       "EVALUATION_RATING" DOUBLE COMMENT 'Evaluation results',
       "REPORTS_TO" INTEGER not null COMMENT 'Reports to Manager',
       "FEEDBACK_COMMENT" NVARCHAR(512) COMMENT 'Feedback comment',
       "SATISFACTION_INDEX" DOUBLE COMMENT 'Employee given rating',
       PRIMARY KEY ("ID")
   )
   COMMENT 'Performance evaluation record'

What is going on?   You have created a database module and a design time artifact representing a table. When this module is deployed, SAP Business Application Studio will automatically create the runtime object (a physical table) in the schema associated to the HDI container.   This approach allows you to modify the structure of the table without worrying about underlying adaptation operations.

The table you have just defined will have a large text field with comments from the employees. You want to enable an index to enhance text search.

1. Create a new database artifact under the data folder

   

   

2. Use the following name

   Text Copy

   comment_text

   And choose Artifact Type of hdbindex

   

3. Paste the following code into it:

   SQL Copy

   INDEX "COMMENT_TEXT"
   on "PERFORMANCE"("FEEDBACK_COMMENT")

1. Expand the SAP HANA PROJECTS View

   

2. Click the Deploy icon (which looks like a rocket).

   

For testing and development purposes, you can use a local file to load data into an HDI container.

1. Create the configuration for the upload first. In the data folder, create a file called:

   Text Copy

   loads/dataload.hdbtabledata

   

2. Paste the following content into it:

   JSON Copy

   {
       "format_version": 1,
       "imports": [{
   	    "target_table": "PERFORMANCE",
   	    "source_data": {
   		    "data_type": "CSV",
   		    "file_name": "performance.csv",
   		    "has_header": true,
   		    "dialect": "HANA",
   		    "type_config": {
   			    "delimiter": ","
   		    }
   	    }
   	    }]
   }		

3. Download this csv file – https://github.com/SAPDocuments/Tutorials/blob/master/tutorials/hana-cloud-create-db-project/performance.csv into your computer. Upload it into the loads folder using the Upload option

   

4. Deploy the loads folder

   

1. Press the Open HDI Container icon

   

2. The Database Explorer will open in a new browser tab with your HDI container already selected. Select Tables

   

3. Right-click on the table PERFORMANCE and choose Open Data

   

4. Open the SQL editor for this query

   

5. Execute the following SQL statement to complete the validation below:

   SQL Copy

   SELECT ROUND(AVG("SATISFACTION_INDEX"),1)
   FROM "PERFORMANCE";