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 toLowCardinality (children 1)
         ExpressionList (children 1)
          Function plus (children 1)
           ExpressionList (children 2)
            Identifier acc
            Function multiply (children 1)
             ExpressionList (children 2)
              Identifier x
              Literal UInt64_2
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'[1, 2, 3, 4]\'
        Literal \'Array(Nullable(Int64))\'
      Function toInt64 (children 1)
       ExpressionList (children 1)
        Function toLowCardinality (children 1)
         ExpressionList (children 1)
          Literal UInt64_3
