Re: [Geotools-devel] WFS-T extensions: GetFeature

[Andrea A. <aa...@op...>]

Jody Garnett ha scritto:
> Andrea wrote:
>>> GetFeature
>>> - so out of the box it returns the latest
>>>
>>> I am a bit concerned that making the revision columns available 
>>> messes up the origional schema (this simply will not work in the case 
>>> where the schema is provided by a third party authority for example). 
>>> Although this is not your use case (I recognize that) I am going to 
>>> work through how it can be done:

Oh, sleeping on things helps understanding.
I finally realized that your suggestion about using version as a feature
  attribute is the only way to go, it just took a night to my bonehead
to process it.

The real problem in having version as an attribute in the schema is
that I cannot limit the user to express only equality filters on top
of it, he can make really any kind of filter he wants, and that would
turn into a nightmare for me because with the two columns design
encoding filters is real hard (and apparently the one column approach
is not fast enough, see my other comment).

Having it as an attribute forces people to use the revision number
in the WFS 1.0 versioned extension, or the new version attribute in WFS 
1.1, where you can _only_ express an equality comparison with a number
(or say "ALL" in WFS 1.1 to gather all revisions of a feature).

So, thank you muchly Jody, I wouldn't have realized this without your
feedback :-)
Cheers
Andrea