The IsUnknown()
function checks whether the input parameter is unknown and not recognizable as a value or element.
It is only slightly different from IsEmpty()
in the way that an empty text-value is a known element (it is a text and not unknown), but it does not have a value.
This function is SQL compatible. For more information about SQL compatibility, see our documentation.
If the input parameter is a list or a collection (like a Concept-Set), then the IsUnknown()
function checks if the list has no rows.
The
IsKnown()
function checks the opposite of this function.
Returns true
if parameter
is unknown.
Returns false
if parameter
is not unknown.
Name | Type | Required | Description |
---|---|---|---|
parameter
any
Field that is checked for a value