Valid For
GLOBALS
Description
Use NOALLOWNULLABLEKEYS to change the key selection logic so that it does not consider a nullable unique key as a viable candidate for uniquely identifying a row. When disabled, the nullable unique keys are viable candidates.
You should use care when using this parameter because it impacts the contents of the trail file and all installations must be in sync when using this parameter.
Default
ALLOWNULLABLEKEYS
Syntax
ALLOWNULLABLEKEYS | NOALLOWNULLABLEKEYS