Unfortunately, I cannot share the response cause of the NDA, but here's an example of what it might look like:
{
"list":{
"attribute" : someValue
}
}
And the SQL query 'select attribute from table' returns the value 'someValue'.
Now let's say that the attribute from the SQL query returns '(null)', in that case the 'list' node would not contain the 'attribute' element.
Funny thing is that when you reference a non-existing element in the REST request, it returns an empty string, which should be perfect and it's the same when you reference a NULL value in the JDBC request, but they just won't match for some reason.