SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier ts
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier sensor_id
    OrderByElement (children 2)
     Identifier timestamp
     Literal UInt64_1
   Set
