Beginner
Create additional CDS entities and a view
January 5, 2021
Created by
October 10, 2017
15 min.
You will create additional CDS entities and a view
You will learn
You will create two additional entities and a view to expose the data through a Node.js module
Prerequisites
- This tutorial is designed for SAP HANA on premise and SAP HANA, express edition. It is not designed for SAP HANA Cloud.
- Proficiency: Beginner
Step 1: Create a new CDS artifact
Back in the development perspective, open the existing Core Data Services file in Code Editor mode:
You will reuse the existing file to add two more tables and a view.
Step 2: Create two additional entities
Replace the existing code with following code into the editor to create two additional entities:
context PO {
entity APPROVAL_STATUS {
ID : String(1);
TEXT : String(200);
};
entity HEADER {
key PURCHASEORDERID : String(10) not null;
CURRENCY : String(5);
GROSSAMOUNT : Decimal(15, 2);
NETAMOUNT : Decimal(15, 2);
APPROVALSTATUS : String(1);
};
entity ITEM {
key PURCHASEORDERID : String(10) not null;
key PURCHASEORDERITEM : String(10) not null;
PRODUCTID : String(10);
CURRENCY : String(5);
GROSSAMOUNT : Decimal(15, 2);
NETAMOUNT : String(10);
QUANTITY : Decimal(5, 2);
QUANTITYUNIT : String(5);
};
define view PO_VIEW as
select from HEADER join APPROVAL_STATUS as A on "A"."ID" = "HEADER"."APPROVALSTATUS"
{
"HEADER"."PURCHASEORDERID" as "PURCHASEORDERID",
"HEADER"."APPROVALSTATUS" as "APPROVALSTATUS",
"HEADER"."GROSSAMOUNT" as "GROSSAMOUNT",
"HEADER"."CURRENCY" as "CURRENCY",
"A"."TEXT" as "TEXT"
};
};
As follows:
Save and Build the database module.
Step 3: Load data into the entities
You will now use plain SQL to load data into your newly created entities. Copy the following code in the SQL console you left open from the database explorer:
INSERT INTO "DB_1"."PO.HEADER" VALUES('1000','USD',1704.22,1297.88,'A');
INSERT INTO "DB_1"."PO.HEADER" VALUES('1001','USD',184.39,1862.61,'A');
INSERT INTO "DB_1"."PO.HEADER" VALUES('1002','USD',1588.3,147.53,'R');
INSERT INTO "DB_1"."PO.HEADER" VALUES('1003','USD',178.14,485.68,'I');
INSERT INTO "DB_1"."PO.HEADER" VALUES('1004','USD',869.59,652.36,'I');
INSERT INTO "DB_1"."PO.HEADER" VALUES('1005','USD',1671.67,624.85,'A');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1000','1','PC_1001','USD',1657.7,193.38,2,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1001','1','HR_1232','USD',240.96,1964.76,5,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1002','1','IT_8456','USD',1678.83,1156.55,1,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1003','1','BO_5423','USD',136.45,212.50,1,'KG');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1004','1','PI_3721','USD',1108.46,1283.65,3,'KG');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1005','1','CC_3526','USD',581.84,1678.54,4,'LB');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1000','2','PROD1','USD',1241.95,1679.88,1,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1001','2','PROD1','USD',1490.50,460.70,5,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1002','2','PROD1','USD',318.25,7.15,4,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1003','2','PROD1','USD',311.75,152.29,1,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1004','2','PROD1','USD',664.58,864.91,5,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1005','2','PROD1','USD',1174.65,216.97,1,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1000','3','PRID2','USD',1839.9,1425.12,4,'M');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1001','3','PRID3','USD',1344.18,1838.52,3,'M');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1002','3','PRID4','USD',1109.49,950.91,1,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1003','3','PRID5','USD',570.36,1804.31,1,'LB');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1004','3','PRID6','USD',38.5,1874.59,2,'KG');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1005','3','PRID7','USD',1145.66,126.50,2,'G');
Click on the Run button:
