SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function variantElement (children 1)
     ExpressionList (children 2)
      Function CAST (children 1)
       ExpressionList (children 2)
        Function CAST (children 1)
         ExpressionList (children 2)
          Function if (children 1)
           ExpressionList (children 3)
            Function modulo (children 1)
             ExpressionList (children 2)
              Identifier number
              Literal UInt64_2
            Literal NULL
            Function concat (children 1)
             ExpressionList (children 2)
              Literal \'str_\'
              Function toString (children 1)
               ExpressionList (children 1)
                Identifier number
          Literal \'LowCardinality(Nullable(String))\'
        Literal \'Variant(LowCardinality(String), UInt64)\'
      Literal \'LowCardinality(String)\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_4
