IsDefined
predicates-functions IsDefined
syntax
- IsDefined(a)
definition
IsDefined(a) results in a boolean data-item with values True for non null and False for null values of data item a.
applies to
- data item with Numeric, Point or string value-type
example
attribute<bool> IsDefinedA (ADomain) := IsDefined(A);
| A(float32) | IsDefinedA |
|---|---|
| 0 | True |
| null | False |
| 1000000 | True |
| -2.5 | True |
| 99.9 | True |
ADomain, nr of rows = 5