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Re: ORMs comparisons/complaints. [message #184507 is a reply to message #184484]

Fri, 03 January 2014 20:43

Arne Vajhøj
Messages: 27
Registered: December 2013

Karma:

Junior Member

On 1/3/2014 4:19 AM, Gordon Levi wrote:
> Arne Vajhøj <arne(at)vajhoej(dot)dk> wrote:
>
>> On 1/2/2014 3:34 AM, Gordon Levi wrote:
>>> Arne Vajhøj <arne(at)vajhoej(dot)dk> wrote:
>>>> Let us say that you need to add a field.
>>>>
>>>> With an ORM you only need to update:
>>>> * one dataclass
>>>> * one mapping of data
>>>>
>>>> With plain JDBC you need to change:
>>>> * one data class
>>>> * N SQL statements
>>>> * N places in the Java code
>>>
>>> I don't understand this so I fear I must be doing something wrong in
>>> my Java programs. If someone wants to add a field in a database why do
>>> I have to alter anything in my program other than adding, for example,
>>> getString(String columnLabel) if I want to actually use the new field
>>> at that point in the program.
>>
>> The context is that the class is persisted in a relational
>> database.
>
> Thank you, it seems my fears are well founded. Does that mean that
> real Java programmers go to the trouble of breaking the relational
> model in order to maintain the object model?

????

If you use an object oriented language and a relational
database, then you will have both an object model and a
relational model.

Neither model need to be broken.

And it is not something special for Java.

The only thing special for Java may be that using an ORM instead
of a lot of handwritten code when moving data between the two models
is much more common than in many other languages.

Arne

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[Message index]

		ORMs comparisons/complaints. By: Daniel Pitts on Sun, 22 December 2013 19:05
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Sun, 22 December 2013 19:46
		Re: ORMs comparisons/complaints. By: Jerry Stuckle on Sun, 22 December 2013 20:17
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Sun, 22 December 2013 20:38
		Re: ORMs comparisons/complaints. By: Jerry Stuckle on Sun, 22 December 2013 20:47
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Sun, 22 December 2013 21:04
		Re: ORMs comparisons/complaints. By: Jerry Stuckle on Sun, 22 December 2013 21:09
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Sun, 22 December 2013 21:20
		Re: ORMs comparisons/complaints. By: Jerry Stuckle on Sun, 22 December 2013 21:34
		Re: ORMs comparisons/complaints. By: Qu0ll on Mon, 23 December 2013 01:54
		Re: ORMs comparisons/complaints. By: Michael Vilain on Mon, 23 December 2013 04:48
		Re: ORMs comparisons/complaints. By: Jerry Stuckle on Mon, 23 December 2013 12:58
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Mon, 30 December 2013 03:46
		Re: ORMs comparisons/complaints. By: Qu0ll on Mon, 30 December 2013 03:54
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Mon, 30 December 2013 04:06
		Re: ORMs comparisons/complaints. By: Qu0ll on Mon, 30 December 2013 04:21
		Re: ORMs comparisons/complaints. By: Jerry Stuckle on Mon, 30 December 2013 13:04
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Mon, 30 December 2013 17:32
		Re: ORMs comparisons/complaints. By: Jerry Stuckle on Mon, 30 December 2013 17:47
		Re: ORMs comparisons/complaints. By: Qu0ll on Mon, 30 December 2013 21:23
		Re: ORMs comparisons/complaints. By: Doug Miller on Mon, 30 December 2013 19:45
		Re: ORMs comparisons/complaints. By: Ricardo Palomaes on Mon, 30 December 2013 18:20
		Re: ORMs comparisons/complaints. By: The Natural Philosoph on Mon, 30 December 2013 18:34
		Re: ORMs comparisons/complaints. By: Jerry Stuckle on Mon, 30 December 2013 19:27
		Re: ORMs comparisons/complaints. By: Marcel Müller on Sun, 22 December 2013 21:26
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Mon, 30 December 2013 04:17
		Re: ORMs comparisons/complaints. By: Kevin McMurtrie on Mon, 23 December 2013 00:11
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Mon, 30 December 2013 04:08
		Re: ORMs comparisons/complaints. By: Arved Sandstrom on Mon, 30 December 2013 21:36
		Re: ORMs comparisons/complaints. By: The Natural Philosoph on Mon, 30 December 2013 22:13
		Re: ORMs comparisons/complaints. By: Arved Sandstrom on Tue, 31 December 2013 02:09
		Re: ORMs comparisons/complaints. By: The Natural Philosoph on Tue, 31 December 2013 11:30
		Re: ORMs comparisons/complaints. By: Jerry Stuckle on Tue, 31 December 2013 13:11
		Re: ORMs comparisons/complaints. By: Chris Uppal on Wed, 01 January 2014 14:20
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Thu, 02 January 2014 03:05
		Re: ORMs comparisons/complaints. By: Qu0ll on Thu, 02 January 2014 03:48
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Thu, 02 January 2014 02:57
		Re: ORMs comparisons/complaints. By: Arved Sandstrom on Thu, 02 January 2014 08:04
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Thu, 02 January 2014 02:54
		Re: ORMs comparisons/complaints. By: Arved Sandstrom on Thu, 02 January 2014 08:09
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Fri, 03 January 2014 01:54
		Re: ORMs comparisons/complaints. By: Arved Sandstrom on Fri, 03 January 2014 13:18
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Fri, 03 January 2014 21:45
		Re: ORMs comparisons/complaints. By: Qu0ll on Mon, 23 December 2013 06:38
		Re: ORMs comparisons/complaints. By: Jerry Stuckle on Mon, 23 December 2013 12:57
		Re: ORMs comparisons/complaints. By: Qu0ll on Mon, 23 December 2013 23:11
		Re: ORMs comparisons/complaints. By: Jerry Stuckle on Tue, 24 December 2013 00:59
		Re: ORMs comparisons/complaints. By: Qu0ll on Tue, 24 December 2013 01:14
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Mon, 30 December 2013 04:02
		Re: ORMs comparisons/complaints. By: Qu0ll on Mon, 30 December 2013 04:40
		Re: ORMs comparisons/complaints. By: Silvio on Mon, 23 December 2013 12:25
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Mon, 30 December 2013 04:27
		Re: ORMs comparisons/complaints. By: Silvio on Mon, 30 December 2013 13:38
		Re: ORMs comparisons/complaints. By: Daniel Pitts on Mon, 30 December 2013 17:36
		Re: ORMs comparisons/complaints. By: Silvio on Tue, 31 December 2013 00:26
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Thu, 02 January 2014 03:23
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Thu, 02 January 2014 03:19
		Re: ORMs comparisons/complaints. By: Silvio on Thu, 02 January 2014 11:36
		Re: ORMs comparisons/complaints. By: Daniel Pitts on Thu, 02 January 2014 17:36
		Re: ORMs comparisons/complaints. By: Silvio on Thu, 02 January 2014 20:06
		Re: ORMs comparisons/complaints. By: Chris Uppal on Fri, 03 January 2014 14:48
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Fri, 03 January 2014 01:59
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Fri, 03 January 2014 02:07
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Fri, 03 January 2014 02:10
		Re: ORMs comparisons/complaints. By: Arved Sandstrom on Tue, 31 December 2013 13:44
		Re: ORMs comparisons/complaints. By: leif.roar on Mon, 23 December 2013 13:22
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Mon, 30 December 2013 04:20
		Re: ORMs comparisons/complaints. By: Wanja Gayk on Tue, 24 December 2013 11:28
		c By: Jerry Stuckle on Tue, 24 December 2013 13:49
		Re: c By: Qu0ll on Tue, 24 December 2013 22:35
		Re: c By: Graham Hobbs on Wed, 25 December 2013 00:35
		Re: c By: Jerry Stuckle on Wed, 25 December 2013 05:08
		Re: c By: Qu0ll on Wed, 25 December 2013 06:46
		Re: c By: Graham Hobbs on Wed, 25 December 2013 14:24
		Re: c By: Qu0ll on Wed, 25 December 2013 09:41
		[EOD] Re: c By: Wanja Gayk on Wed, 25 December 2013 10:15
		Re: [EOD] Re: c By: Qu0ll on Wed, 25 December 2013 12:29
		Re: [EOD] Re: c By: The Natural Philosoph on Wed, 25 December 2013 12:48
		Re: c By: Arne Vajhøj on Mon, 30 December 2013 03:51
		Re: c By: Jerry Stuckle on Mon, 30 December 2013 13:03
		Re: c By: Arne Vajhøj on Mon, 30 December 2013 17:40
		Re: c By: Jerry Stuckle on Mon, 30 December 2013 17:46
		Re: ORMs comparisons/complaints. By: Arved Sandstrom on Wed, 25 December 2013 17:56
		Re: ORMs comparisons/complaints. By: jebblue on Tue, 31 December 2013 16:52
		Re: ORMs comparisons/complaints. By: Evan Platt on Tue, 31 December 2013 19:50
		Re: ORMs comparisons/complaints. By: Arved Sandstrom on Tue, 31 December 2013 21:54
		Re: ORMs comparisons/complaints. By: jebblue on Wed, 01 January 2014 01:33
		Re: ORMs comparisons/complaints. By: Arved Sandstrom on Thu, 02 January 2014 21:37
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Thu, 02 January 2014 02:46
		Re: ORMs comparisons/complaints. By: Gordon Levi on Thu, 02 January 2014 08:34
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Fri, 03 January 2014 01:43
		Re: ORMs comparisons/complaints. By: Gordon Levi on Fri, 03 January 2014 09:19
		Re: ORMs comparisons/complaints. By: Arne Vajhøj on Fri, 03 January 2014 20:43

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