SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function CAST (children 1)
     ExpressionList (children 2)
      Function arrayElement (children 1)
       ExpressionList (children 2)
        Literal Array_[UInt64_3, UInt64_4, UInt64_5]
        Literal UInt64_1
      Literal \'Int32\'
