[KERNEL][5821] Fix null pointer exception in FieldMetadata.equals
#5887
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Which Delta project/connector is this regarding?
Description
Fix null pointer exception in
FieldMetadata.equals. Previously,e.getValue().getClass().isArray()could raise null pointer exception, sincee.getValue()can be null.How was this patch tested?
New unit tests.
Does this PR introduce any user-facing changes?
No.