SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayFold (children 1)
     ExpressionList (children 3)
      Function lambda (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 2)
          Identifier acc
          Identifier x
        Function CAST (children 1)
         ExpressionList (children 2)
          Function plus (children 1)
           ExpressionList (children 2)
            Identifier acc
            Function multiply (children 1)
             ExpressionList (children 2)
              Identifier x
              Literal UInt64_2
          Literal \'LowCardinality(Nullable(Int64))\'
      Literal Array_[UInt64_1, UInt64_2, UInt64_3, UInt64_4]
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal NULL
        Literal \'LowCardinality(Nullable(Int64))\'
