SetNull PowerScript function
Description
Sets a variable to null. The variable can
be any datatype except for a structure or autoinstantiated object.
Syntax
|
1 |
<span>SetNull</span> ( <span>anyvariable</span> ) |
|
Argument |
Description |
|---|---|
|
anyvariable |
The variable you want to set to null |
Return Values
Integer. Returns 1 if it succeeds and
-1 if an error occurs. If any argument’s value is null, SetNull returns null.
Usage
Use SetNull to set a variable to null before
writing it to the database. Note that PowerBuilder does not initialize
variables to null; it initializes variables to
the default initial value for the datatype unless you specify a
value when you declare the variable.
If you assign a value to a variable whose datatype is Any
and then set the variable to null, the datatype
of the null value is still the datatype of the
assigned value. You cannot untype an Any variable with the SetNull function.
Examples
This statement sets the variable Salary to null:
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1 |
<span>SetNull</span>(Salary) |