Re: What does everyone else do for graphically displaying data?
- From: Lew <lew@xxxxxxxxxxxxx>
- Date: Thu, 27 Dec 2007 18:58:59 -0500
mdR wrote:
i am thinking along the 'natural' key process, where a unique column
key identifies the row. in line with more traditional columned/
tabulated data and a unique identifier that is assigned by me.
A "natural" key might have one column, or several.
The important thing is to identify the key for the row.
just thinking... are you referring at all to storing persistent
objects rather than raw data? (i am not very familiar with object
persistence).
The question has no meaning.
What I refer to in a relational database is the storage of rows and columns in tables. In the post to which you replied there was no mention of "persistent objects" nor of "raw data".
I have no idea what you think happens "rather than" what else. The "rather than" phrase implies a tension or conflict that I do not perceive.
There is a mapping between table rows, perhaps joined in a view, and the object model, of course. There always is.
Managing that mapping is the job of the data-access layer (or "Data Access Object" layer, the "DAO" layer).
So what gets stored is "raw" data (whatever that means [1]) that can be used to persist what the software sees as object data.
If the logic can re-create an object from persistent storage, by definition that's a persistent object. What gets stored isn't an object, it's data. What gets restored from that data might be an object.
[1] What makes data "raw"? What characterizes data that is not "raw"?
--
Lew
.
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