CreateQuery ttl (children 3)
 Identifier ttl
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration a (children 1)
    DataType UInt32
   ColumnDeclaration timestamp (children 1)
    DataType DateTime
 Storage definition (children 3)
  Function MergeTree
  Identifier a
  ExpressionList (children 1)
   TTLElement (children 2)
    Function plus (children 1)
     ExpressionList (children 2)
      Identifier timestamp
      Function toIntervalSecond (children 1)
       ExpressionList (children 1)
        Literal UInt64_2
    Function in (children 1)
     ExpressionList (children 2)
      Identifier a
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 3)
          ExpressionList (children 1)
           Identifier number
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier system.numbers
          Literal UInt64_100000
