SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function if (children 1)
     ExpressionList (children 3)
      Literal NULL
      Function materialize (children 1)
       ExpressionList (children 1)
        Function map (children 1)
         ExpressionList (children 4)
          Literal UInt64_1
          Literal UInt64_2
          Literal UInt64_3
          Literal UInt64_4
      Function map (children 1)
       ExpressionList (children 4)
        Literal UInt64_3
        Literal UInt64_4
        Literal UInt64_5
        Literal UInt64_6
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_2
