On 22.08.2013 14:26, Markus Schaber wrote:
> Hi,
>
> Some days ago, I stumbled across a problem, and could analyze it a little bit 
> those days.
>
> Windows has a general limit on the path length of 260 characters on some 
> APIs, while others allow a length of about 32k characters (with some 
> restrictions).
>
> Most (if not all) of the SVN codebase seems to work fine with those long 
> pathes.

Yes, APR takes care to use the Unicode APIs and use \\?.

>  However, it seems that SQLite is not (yet) long path clean:

Sigh...
[...snip...]

> I already mentioned this problem on IRC, where Bert meant that it is an issue 
> in SQLite itself which has its own windows abstracton layer.
>
> Now, some questions arise:
> 1) Is this issue worth to file a bug report in the SVN database? (Up to now, 
> none of our customers has been bitten by that issue, but it is very likely 
> that one will show up sooner or later...)

IMO it's a good idea to track this, but I propose you also file the
report to SQLite (and put a link to that report in our report).

> And for the folks more experienced with SQLite:
> 2) Is the SQLite project open and responsive for bug reports?
> 3) Is it possible to feed SQLite a "long" path using the \\?\ prefix?

No idea, on either count.

> 4) Is it possible to work around this issue by providing our own SQLite VFS 
> (which may delegate everything except file opening to the default one)?

I haven't looked closely at SQLite's VFS API, but a quick look at the
VFS object indicates that this would probably work -- as a stogap.

It would be a lot better to have a fix in SQLite; it shouldn't be too
hard to create a patch, never mind that the SQLite code is a mess. :)

-- Brane

-- 
Branko Čibej | Director of Subversion
WANdisco // Non-Stop Data
e. br...@wandisco.com

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