Overview
You will learn
- How to invoke SQLScript logic without a persistent logic container
Prerequisites
Prerequisites
- This tutorial is designed for SAP HANA on premise and SAP HANA, express edition. It is not designed for SAP HANA Cloud.
- Tutorials: Creating SQLScript User Defined Libraries
Steps
Intro
In this exercise, we will show you how you can invoke SQLScript logic without the need to create a persistent logic container such as a procedure or function. Instead we will use so called anonymous blocks.
From the Database Explorer page, click the “SQL Console” button
To have an anonymous block you need a do begin … end. Enter the this code in the SQL tab.
Copy the logic from the procedure get_po_header_data into the body. Make sure to only copy the code between the BEGIN and END statements
Copy the signature from the procedure get_po_header_data into the signature part of the anonymous block. Ensure the parameter is assigned to a query parameter placeholder (?) as shown.
The completed code should look very similar to this.
DO( OUT EX_TOP_3_EMP_PO_COMBINED_CNT TABLE(
FULLNAME NVARCHAR(256),
CREATE_CNT INTEGER,
CHANGE_CNT INTEGER,
COMBINED_CNT INTEGER ) =>? )
BEGIN
po_create_cnt = SELECT COUNT(*) AS CREATE_CNT, "HISTORY.CREATEDBY.EMPLOYEEID" AS EID
FROM "PO.Header" WHERE PURCHASEORDERID IN (
SELECT PURCHASEORDERID
FROM "PO.Item"
WHERE "PRODUCT.PRODUCTID" IS NOT NULL)
GROUP BY "HISTORY.CREATEDBY.EMPLOYEEID";
po_change_cnt = SELECT COUNT(*) AS CHANGE_CNT, "HISTORY.CHANGEDBY.EMPLOYEEID" AS EID
FROM "PO.Header" WHERE PURCHASEORDERID IN (
SELECT PURCHASEORDERID
FROM "PO.Item"
WHERE "PRODUCT.PRODUCTID" IS NOT NULL)
GROUP BY "HISTORY.CHANGEDBY.EMPLOYEEID";
EX_TOP_3_EMP_PO_COMBINED_CNT =
SELECT "get_full_name"( "NAME.FIRST", "NAME.MIDDLE", "NAME.LAST") as FULLNAME,
crcnt.CREATE_CNT, chcnt.CHANGE_CNT,
crcnt.CREATE_CNT + chcnt.CHANGE_CNT AS COMBINED_CNT
FROM "MD.Employees" as emp
LEFT OUTER JOIN :PO_CREATE_CNT AS crcnt
ON emp.EMPLOYEEID = crcnt.EID
LEFT OUTER JOIN :PO_CHANGE_CNT AS chcnt
ON emp.EMPLOYEEID = chcnt.EID
ORDER BY COMBINED_CNT DESC LIMIT 3;
END;Click Run. You will notice that the SQLScript code is executed and results are shown. Again, there is no procedure or function created here, just the SQLScript being executed by the engine.
Resources
Discussion
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