NullEqualityRule variable
Variable describing what to do when checking for equality of
Null values.
Declaration
NullEqualityRule: TNullCompareRule = ncrLooseDescription
NullEqualityRule is checked when the system needs to compare the equality of variants with
Null values (operations
opCmpEq,
opCmpNe).
Check
TNullCompareRule for a list of allowed values. The default is
ncrLoose.
For determining the order (less than, greater than etc.) see NullMagnitudeRule.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.