how to skip null values in odata response?

Question

I have an odata web service that is returning some null values. I would like to skip these null values. I tried to use the Ne(Not equal) operator to filter the data with null values:

analyticView.xsodata/analyticView?$select=QUANTITY_SOLD,SALE_PRICE&$filter=SALE_PRICE+Ne+null)&$format=json

and I am getting the following error message:

"Illegal operation 'Ne' at position 11."

I tried also to combine the Not operator with the eq operator in this way:

analyticView.xsodata/analyticView?$select=QUANTITY_SOLD,SALE_PRICE&$filter=not(SALE_PRICE+eq+null)&$format=json

I keep getting an error message saying:

value: "No property 'null' exists in type ...

I am using SAP HANA analytic view as a data source, but I thing the issue is not vendor dependent. so, what to do to skip the null values?

Answer 1

The above solutions should work fine, baring in mind that the operators are case sensitive as pointed out by Tne. So in general to filter null values you can use:

• $filter=(SALE_PRICE+ne+null)
• or $filter=not(SALE_PRICE+eq+null)

However in the particular case of SAP HANA analytic views the null value is not supported, as a workaround the filters can be defined on the table column at the modeling level of the analytic view. The solution is explained here.

Answer 2

Note that the operators are case-sensitive. (Use ne instead of Ne.)

The spec does mention that "ISNULL or COALESCE operators are not defined. Instead, there is a null literal which can be used in comparisons" (v3.0, URL Conventions, section 5.1.2.4), which means that it should work.

Indeed, I tried Property ne null without any issue. What's weird is that your attempt with not, although not useful, should have worked. Maybe look at replacing + characters with spaces (possibly encoded), maybe the server is confused.