IsNull

Predicates functions IsNull

syntax

• IsNull(a)

definition

IsNull(a) results in a boolean data item with values True for null and False for non null values of data item a.

applies to

• data item with Numeric, Point or string value type

example

attribute<bool> IsNullA (ADomain) := IsNull(A);

A(float32)	IsNullA
0	False
null	True
1000000	False
-2.5	False
99.9	False

ADomain, nr of rows = 5

see also

• IsDefined