Mv Union

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MV UNION

Returns all unique values from the combined input fields (set union). Null values are treated as empty sets; returns null only if both fields are null.

ROW a = [1, 2, 3, 4, 5], b = [2, 3, 4, 5, 6]
| EVAL finalValue = MV_UNION(a, b)
| KEEP finalValue