System.Variants.NullMagnitudeRule

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Delphi

NullMagnitudeRule: TNullCompareRule = ncrLoose;

C++

extern DELPHI_PACKAGE TNullCompareRule NullMagnitudeRule;

Properties

Type	Visibility	Source	Unit	Parent
variable	public	System.Variants.pas System.Variants.hpp	System.Variants	System.Variants

Description

Specifies rule for Null variant magnitude comparison.

NullMagnitudeRule determines the rule for handling magnitude comparisons (one value is greater than, greater than or equals, less than, or less than or equals to another) when one of the values compared is a variant containing a null value. NullMagnitudeRule can have the following values:

Constant	Meaning
ncrLoose	(Default.) A variant containing a null is treated as a unique value that is less than any other value, but equal to another variant containing a null.
ncrStrict	A magnitude comparison of a variant containing a null is always false, regardless of the other value.
ncrError	A magnitude comparison raises an EVariantInvalidNullOpError if either value is a variant containing a null.

See Also

• Null

• NullStrictConvert

• EVariantInvalidNullOpError