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[CYPHER] List concatenation || with null returns only first list #3928

@ExtReMLapin

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@ExtReMLapin

Test: listConcatenationWithNull (line 343)

Cypher query to execute:

RETURN [1, 2] || [3, null] AS result

Expected behavior:

[1, 2] || [3, null] should return [1, 2, 3, null]

ArcadeDB result:

{"result": [1, 2]}

Neo4j result:

{"result": [1, 2, 3, null]}

When concatenating lists with || where the second list contains null, only the first list is returned instead of the full concatenation.

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