As of HHH-7610, Hibernate should regard empty composite values and {{null}} as equivalent.
Currently, when a composite value is compared to {{null}} by either {{ComponentType#isEqual}} implementation, each value in the empty composite it compared to {{null}}.
If the empty composite has a primitive attribute, {{ComponentType#isEqual}} will always return {{false}} (because a primitive attribute cannot be null).
If the composite has a parent attribute {e.g., mapped with {{ @Parent}}, that attribute is ignored by {{ComponentType#isEqual}}. |
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