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

see also

• MakeDefined
• isNull