SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function has (children 1)
     ExpressionList (children 2)
      Function array (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 2)
          Identifier a
          Identifier b
        Function tuple (children 1)
         ExpressionList (children 2)
          Identifier c
          Identifier d
      Function tuple (children 1)
       ExpressionList (children 2)
        Identifier b
        Identifier c
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 3)
          ExpressionList (children 4)
           Function plus (alias a) (children 1)
            ExpressionList (children 2)
             Identifier number
             Literal UInt64_1
           Function plus (alias b) (children 1)
            ExpressionList (children 2)
             Identifier number
             Literal UInt64_2
           Function plus (alias c) (children 1)
            ExpressionList (children 2)
             Identifier number
             Literal UInt64_3
           Function plus (alias d) (children 1)
            ExpressionList (children 2)
             Identifier number
             Literal UInt64_4
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier system.numbers
          Literal UInt64_2