$null Changes Meaning - Caveat

With compatibilityversion 8 or later, the $null special Vortex variable has a different meaning - it is a variable that is permanently zero-valued (i.e. a constant of no values). It also loses its special meaning as the default for the <SQL NULL> option. See here for details.

Caveat: Assignments to $null will cause a runtime error, and any usage of $null by <SQL> must be changed to the <SQL NULL> option, when compatibilityversion is 8 or later.


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