RE: Query object contained within a Query object
>>I suspect it has more to do with the fact that people have specific >>expectations about what's in a query object than anything else. People have >>a two-dimensional mental model of what a recordset is, and nesting one >>recordset within another would break that model. You may very well be right. Perhaps it is simply the usage of the word "query" in this context that makes people start screaming in horror ;-) I'm not saying that I necessarily disagree, but I guess XML expanded *my* concept or perhaps definition of "recordsets". So the idea of either a query within a query or a structure within a query is not quite as horrifying to me as it might have been years ago. However, this is primarily a excercise in exploration and just satisfying my own curiousity. Thanks for sharing your thoughts. ~| Find out how CFTicket can increase your company's customer support efficiency by 100% http://www.houseoffusion.com/banners/view.cfm?bannerid=49 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:212673 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Query object contained within a Query object
>>> Claude Schneegans >The result would be the same, but the sub-query would not have to be >copied into the main query, and there would be a difference on performance. I would think that the sub-queries would not be "copied" into the main query. In java, objects like structures are passed by reference. So I would assume (perhaps incorrectly) that queries objects would not be "copied", and that adding the sub-query to the main query would just add a reference not a copy of the object. ~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:212672 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Query object contained within a Query object
>>While I am aware of most of the alternatives, I'm more interested in understanding the pratical reasons why this method is not used. There would definitely be a performance problem, especially if the sub-queries are big queries. Although I didn't try it, I think one of these alternative would be to leave the sub-query where it is and just store its name in the above query, then use QUERY="#aboveQuery.subQueryName#" instead of QUERY="#aboveQuery.subQuery#". The result would be the same, but the sub-query would not have to be copied into the main query, and there would be a difference on performance. Another alternative would be to store the SQL code in the main query and perform the sub query only inside the loop. -- ___ REUSE CODE! Use custom tags; See http://www.contentbox.com/claude/customtags/tagstore.cfm (Please send any spam to this address: [EMAIL PROTECTED]) Thanks. ~| Find out how CFTicket can increase your company's customer support efficiency by 100% http://www.houseoffusion.com/banners/view.cfm?bannerid=49 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:212530 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Query object contained within a Query object
Dave Watts wrote: > recordset within another would break that model. In any case, I haven't yet > encountered a need to use this construct, so this discussion is fairly > academic to me. well i could see the benefit for something like the cfpop query's mail headers (though as a structure rather than a query). having that info in a structure as opposed to a big gob of text would be nice (say for parsing the actual received date out of a pop3 message). ~| Find out how CFTicket can increase your company's customer support efficiency by 100% http://www.houseoffusion.com/banners/view.cfm?bannerid=49 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:212493 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
RE: Query object contained within a Query object
> For the purposes of my question ... "yes" ;-)While I am > aware of most of the alternatives, I'm more interested in > understanding the pratical reasons why this method is not > used. I suspect it has more to do with the fact that people have specific expectations about what's in a query object than anything else. People have a two-dimensional mental model of what a recordset is, and nesting one recordset within another would break that model. In any case, I haven't yet encountered a need to use this construct, so this discussion is fairly academic to me. Dave Watts, CTO, Fig Leaf Software http://www.figleaf.com/ Fig Leaf Software provides the highest caliber vendor-authorized instruction at our training centers in Washington DC, Atlanta, Chicago, Baltimore, Northern Virginia, or on-site at your location. Visit http://training.figleaf.com/ for more information! ~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:212469 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Query object contained within a Query object
>Claude Schneegans >That is the question. >One can sure use loops on queries inside loops on queries, but do we >need to store them inside each others ? For the purposes of my question ... "yes" ;-)While I am aware of most of the alternatives, I'm more interested in understanding the pratical reasons why this method is not used. ~| Discover CFTicket - The leading ColdFusion Help Desk and Trouble Ticket application http://www.houseoffusion.com/banners/view.cfm?bannerid=48 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:212467 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Query object contained within a Query object
>I think my biggest problem with doing this is, the performance cost of >query objects. Aside from file handling query objects seem to be one >of the worst performing objects in coldfusion. > >Adam H Yes, I would expect query objects to be more expensive than an arrays. Any stats/links or explanations about the exact difference in performance costs, specifically of query objects versus structures? ~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:212441 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Query object contained within a Query object
>>and am wondering if there is a good reason why. That is the question. One can sure use loops on queries inside loops on queries, but do we need to store them inside each others ? ~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:212433 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Query object contained within a Query object
I think my biggest problem with doing this is, the performance cost of query objects. Aside from file handling query objects seem to be one of the worst performing objects in coldfusion. Adam H On 7/21/05, HOFLee _ <[EMAIL PROTECTED]> wrote: > Thank you both for your responses. > > >>Personnally, I'd be more interested in hearing "why this would be a *good* > >>idea?" > > Primarily because query objects can be used with the cfoutput/cfloop tags > which IMO provide a simpler and cleaner method for accessing the related > information than structures or array objects. While a simple array/structure > is pretty straight-forward, I think it takes a lot more code and is less > intutive to retrieve information from a similar construct composed of nested > arrays/structures. > > I've seen structures of structures used before, but not queries within > queries and am wondering if there is a good reason why. > > ~| Discover CFTicket - The leading ColdFusion Help Desk and Trouble Ticket application http://www.houseoffusion.com/banners/view.cfm?bannerid=48 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:212427 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Query object contained within a Query object
Thank you both for your responses. >>Personnally, I'd be more interested in hearing "why this would be a *good* >>idea?" Primarily because query objects can be used with the cfoutput/cfloop tags which IMO provide a simpler and cleaner method for accessing the related information than structures or array objects. While a simple array/structure is pretty straight-forward, I think it takes a lot more code and is less intutive to retrieve information from a similar construct composed of nested arrays/structures. I've seen structures of structures used before, but not queries within queries and am wondering if there is a good reason why. ~| Discover CFTicket - The leading ColdFusion Help Desk and Trouble Ticket application http://www.houseoffusion.com/banners/view.cfm?bannerid=48 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:212421 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Query object contained within a Query object
>>Because anybody looking at the code wouldn't at first understand what is >>going on. I don't think this is a good reason. If somebody looking at "" is not able to understand what's being done, he better not have access to the code anyway. Personnally, I'd be more interested in hearing "why this would be a *good* idea?" -- ___ REUSE CODE! Use custom tags; See http://www.contentbox.com/claude/customtags/tagstore.cfm (Please send any spam to this address: [EMAIL PROTECTED]) Thanks. ~| Discover CFTicket - The leading ColdFusion Help Desk and Trouble Ticket application http://www.houseoffusion.com/banners/view.cfm?bannerid=48 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:212374 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
RE: Query object contained within a Query object
Because anybody looking at the code wouldn't at first understand what is going on. If you do something weird to it, it will cost more to matain that particular piece of code. That's why. Jared Clinton NEC Business Solutions. -Original Message- From: Lee _ [mailto:[EMAIL PROTECTED] Sent: Thursday, 21 July 2005 3:10 PM To: CF-Talk Subject: Query object contained within a Query object For my own edification, I'm interested in learning the reasons why the following would *NOT* be a good idea: Storing a query object within another query object, like: I am aware that you can accomplish a similar effect by constructing an array of structures or a structure of structures, etc. However, what I am really interested in is a constructive critique of the query within a query method. Any thoughts or explanations would be appreciated. Thanks in advance. ~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:212363 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
