Create a Streaming Project in SAP HANA Smart Data Streaming

By billjiangsap

Part 2 of 9. Create a SAP HANA Smart Data Streaming (SDS) project in SAP HANA Studio with streaming plug-in and visual editor.

You will learn

Creating a new streaming project: a project contains one or more input streams/windows and then directs the flow of data through continuous queries and/or custom operators, publishing output events via adapters.
Defining an input stream to receive incoming events: All incoming events enter a project via an input stream or input window. The schema of the input stream (or window) defines the fields that events on that stream will (or may) contain.

Details

Create a New Streaming Project

Click the File menu. You can also press Alt+f. Then click the New > Project…. You can also press r.
Click New Streaming Project, then click Next.
Enter freezer_monitoring in the Name box (be sure and only use lower case) and accept the default Directory location.
Click Finish. You can also press Alt+f.

Create the Required SAP HANA Tables

Go to SAP HANA Administration Console perspective, then Systems view. Right click the system you are working with.
Select Open SQL Console menu item to open a console that will automatically connect to your system.
Select the newly created SQL console tab. The tab window will have the title in the format of <Your System Name> - SQL Console <Window Number>

Copy the code below into the SQL window.

--These are the SQL commands to set up the back-end tables for the Freezer Monitoring hands-on exercise.

CREATE COLUMN TABLE "SYSTEM"."ACTIVITY_HIST"
(	"MACHINEID"			VARCHAR(15),
	"EVENT_TIME"		TIMESTAMP,
	"EVENT_NAME"		VARCHAR(20),
	"EVENT_DESCRIPTION"	VARCHAR(30),
	"EVENT_VALUE"		VARCHAR(30)
);

CREATE COLUMN TABLE "SYSTEM"."DASHBOARD"
(	"MACHINEID" 	VARCHAR(15) NOT NULL ,
	"POWER_STATUS" VARCHAR(30),
	"CURR_TEMP" 	DECIMAL(4,2),
	PRIMARY KEY ("MACHINEID")
 );

CREATE COLUMN TABLE "SYSTEM"."MACHINE_REF"
(	"MACHINEID" 	VARCHAR(15) NOT NULL ,
	 "MACHINETYPE" 	VARCHAR(15),
	 "MAX_TEMP" 	DECIMAL(4,2),
	 "MIN_TEMP" 	DECIMAL(4,2),
	 "LOCATION" 	VARCHAR(25),
	 "TEMP_UNIT" 	VARCHAR(2),
	 PRIMARY KEY ("MACHINEID")
);

CREATE COLUMN TABLE "SYSTEM"."POWER_OUTAGES"
(	"MACHINEID" 		VARCHAR(15),
	"POWER_OFF_TIME" 	LONGDATE,
	"POWER_ON_TIME" 	LONGDATE,
	"DURATION_MIN" 	DOUBLE CS_DOUBLE
);

INSERT INTO "SYSTEM"."MACHINE_REF"("MACHINEID", "MACHINETYPE", "MAX_TEMP", "MIN_TEMP", "LOCATION", "TEMP_UNIT") VALUES
( '2DDDBW3TP','VEND',50,35,'WALG31','F');
INSERT INTO "SYSTEM"."MACHINE_REF"("MACHINEID", "MACHINETYPE", "MAX_TEMP", "MIN_TEMP", "LOCATION", "TEMP_UNIT") VALUES
( 'EKM49RTXK','COOL',50,35,'FRI7','F');
INSERT INTO "SYSTEM"."MACHINE_REF"("MACHINEID", "MACHINETYPE", "MAX_TEMP", "MIN_TEMP", "LOCATION", "TEMP_UNIT") VALUES
( 'RB82KMY3S','VEND',50,35,'JRB235','F');
INSERT INTO "SYSTEM"."MACHINE_REF"("MACHINEID", "MACHINETYPE", "MAX_TEMP", "MIN_TEMP", "LOCATION", "TEMP_UNIT") VALUES
( '4CBH7792RN','COOL',50,35,'WALG33','F');
INSERT INTO "SYSTEM"."MACHINE_REF"("MACHINEID", "MACHINETYPE", "MAX_TEMP", "MIN_TEMP", "LOCATION", "TEMP_UNIT") VALUES
( 'JMD51RTKK','VEND',10,2,'BP762','C');
INSERT INTO "SYSTEM"."MACHINE_REF"("MACHINEID", "MACHINETYPE", "MAX_TEMP", "MIN_TEMP", "LOCATION", "TEMP_UNIT") VALUES
( 'GGR23RTXK','FREEZE',32,0,'HIN88','F');
INSERT INTO "SYSTEM"."MACHINE_REF"("MACHINEID", "MACHINETYPE", "MAX_TEMP", "MIN_TEMP", "LOCATION", "TEMP_UNIT") VALUES
( '8HRT4WX2','VEND',50,35,'ORD311','F');

Execute the SQL script by pressing the Execute button.
Confirm that they executed correctly. You should have these tables.
Check to see that all tables created are empty except for MACHINE_REF which will have 7 rows of data.

Create an Input Stream

When you created the project, it created an input stream called “NEWSTREAM” by default.
Click the icon to the left of the name NEWSTREAM and change the name of this stream to MACHINEDATA, then press Enter key.
Click on the + to the left of Schema to expand it.
Now hover the cursor over the right edge of the MACHINEDATA shape so that the toolbar appears. Click on the Add Column tool.
Repeat step 5 three more times, so there are a total of 5 columns.
Double click on the name Column1 and change the name of this column to MACHINEID.
Double click on (INTEGER) to the right of MACHINEID to change the datatype for this column to string. (after double clicking, click the drop down arrow, and select string)
Change the rest of the column names and data types as shown:
Click here - to collapse the shape.

Note: You can just drag the shape to a new position to organize our diagram.