SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Subquery (children 1)
     SelectWithUnionQuery (children 1)
      ExpressionList (children 1)
       SelectQuery (children 4)
        ExpressionList (children 2)
         Function plus (alias number) (children 1)
          ExpressionList (children 2)
           Literal UInt64_1
           Literal UInt64_2
         Function plus (alias b) (children 1)
          ExpressionList (children 2)
           Literal UInt64_1
           Identifier number
        TablesInSelectQuery (children 1)
         TablesInSelectQueryElement (children 1)
          TableExpression (children 1)
           TableIdentifier system.numbers
        Literal UInt64_10
        Literal UInt64_1
    Subquery (children 1)
     SelectWithUnionQuery (children 1)
      ExpressionList (children 1)
       SelectQuery (children 4)
        ExpressionList (children 2)
         Function plus (alias number2) (children 1)
          ExpressionList (children 2)
           Literal UInt64_1
           Literal UInt64_2
         Function plus (alias b) (children 1)
          ExpressionList (children 2)
           Literal UInt64_1
           Identifier number
        TablesInSelectQuery (children 1)
         TablesInSelectQueryElement (children 1)
          TableExpression (children 1)
           TableIdentifier system.numbers
        Literal UInt64_10
        Literal UInt64_1
