SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 6)
   ExpressionList (children 2)
    Function concat (alias a) (children 1)
     ExpressionList (children 2)
      Literal \'a_\'
      Function toString (children 1)
       ExpressionList (children 1)
        Function modulo (children 1)
         ExpressionList (children 2)
          Identifier number
          Literal UInt64_3
    Function modulo (alias b) (children 1)
     ExpressionList (children 2)
      Identifier number
      Literal UInt64_5
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_50
   ExpressionList (children 1)
    Function tuple (children 1)
     ExpressionList (children 2)
      Identifier a
      Identifier b
   ExpressionList (children 1)
    OrderByElement (children 1)
     Function tuple (children 1)
      ExpressionList (children 2)
       Identifier a
       Identifier b
   Literal UInt64_1
   Set
