Handle Divide By 0 Error in Hana Sql or Hana View

Requirement –

Sometime we have to divide two numbers in Hana Sql or in Hana views. If denominator comes as 0 there is no logic implemented handle 0 in denominator then Hana will throw Divide by 0 error during Query execution. Also this is good practice to handle denominator 0 case whenever we do any division in our logic.

Solution –

Below are the some options we can use to handle Divide by 0 error in our Hana Sql script or in Hana views.

DO BEGIN
DECLARE Numerator DECIMAL (38, 16);
DECLARE Denominator DECIMAL (38, 16);

Numerator 	= 100;
Denominator = 0;

-- Divide By 0 Error
--SELECT (Numerator / Denominator) AS "Result" FROM DUMMY;

-- Option 1 Using Case
SELECT CASE WHEN Denominator = 0 THEN 0 ELSE (Numerator / Denominator) 
END AS "Using_Case" FROM DUMMY;

-- Option 2 Using NULLIF
SELECT (Numerator / NULLIF(Denominator, 0)) AS "Using_NullIF" FROM DUMMY;

-- Option 3 Using IF..THEN..ELSE
IF Denominator = 0 THEN
	SELECT 0 AS "Using_IF" FROM DUMMY;
ELSE
	SELECT (Numerator / Denominator) AS "Using_IF" FROM DUMMY;
END IF;

-- Option 4 Using NDIV0 Function
SELECT NDIV0 (Numerator, Denominator) AS "Using_NDIV0" FROM DUMMY;

END;

Implementation of all above options in Graphical view –

Create two calculated columns of type decimal as, Numerator = 100 & Denominator = 6

Function NDIV0 –