Tuesday, 11 February 2020 10:51

Nearby Customers using SAP HANA spatial capabilities & SAPUI5

Written by https://blogs.sap.com/2020/02/12/nearby-customers-using-sap-hana-spatial-capabilities-sapui5/
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Source https://blogs.sap.com/2020/02/12/nearby-customers-using-sap-hana-spatial-capabilities-sapui5/

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over UAE and do a stock audit along with the price tag in each spiral with in the machine . Vending machines are defined as customers in customer master.

So of course in the application, there must be a search help to choose the customer. There we tried to do some improvisation and turned out awesome .

What we did

Before explaining further , lets see the data we had with us in SAP. All the customers’ , including the vending machines’ geo location is maintained in customer master. We have 2 append fields in KNA1 which stores the latitude and longitude. Without which the whole solution wouldn’t be materialized.

The SAPUI5 side

Firstly , we need to capture the location of salesman. When he opens the Fiori application( We have customized Fiori Client , but this works in browser too ) , we call the navigator service which returns the latitude and longitude.

if (!navigator.geolocation) { //no access to read location data } else{ navigator.geolocation.getCurrentPosition(function(position) { var latitude = position.coords.latitude ; var longitude = position.coords.longitude ; //send these cordinates to backend. }.bind(this),function(error){ //ignore the error .. something wrong with lcaiton service }.bind(this)); }

This is how we capture the geo location. If we running this with in the cordova container, then app should have access to read device location .

The ABAP & HANA Side 

Ok , now how do we find the customers nearby ? Either we must use location services API like google to send all the information to them and get it done. But for this particular scenario , this is not required.

2 options  :

Option 1 –  Manually write a logic to find distance to each customer from the geo-coordinate passed from the UI  .

Here is how you can do it. Link

Option 2 : 

We are running on SAP HANA . SAP HANA has built in spacial capabilities .

Let me show you the SQL behind first how does this work .

select (NEW ST_POINT('POINT(25.261515 55.366487)',4326).ST_DISTANCE(NEW ST_POINT('POINT(25.201272 55.274903)',4326),'meter'))/1000 as Distance from dummy ;

And the result returned is 10.889638126959479 KM

We wrote a wrapper AMDP class , which calculates the distance from the input Geo coordinates to each customer( vending machines ) and returns only the list with in 500m limit.

 METHOD get_customers_nearby BY DATABASE PROCEDURE FOR HDB LANGUAGE SQLSCRIPT using KNA1 . LT_KNA1_DATA = select KUNNR , LZONE , NAME1 , NAME2 , cast( NEW ST_POINT('POINT(' || ZLAT || ' ' || ZLONG || ')',4326). ST_DISTANCE(NEW ST_POINT('POINT(' || :LATITUDE || ' ' || :LONGITUDE || ')',4326)) as integer ) as DISTANCE_IN_M from KNA1 where LZONE = :ROUTE and ZLAT != '' and ZLONG != ''; LT_KNA1 = select KUNNR , LZONE , NAME1 , NAME2 , DISTANCE_IN_M from :LT_KNA1_DATA where DISTANCE_IN_M <= :DISTANCEINM order by DISTANCE_IN_M asc; ENDMETHOD.

Output in SAPUI5 App 

Enjoy innovating …

Sreehari Pillai

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