Re: [Exist-open] Best Practice for Loops

[Adam R. <ad...@ex...>]

Your right, eXist does not implement tail-call elimination for
recursive functions. We really should...


On 16 April 2015 at 13:49, Alister Pillow <gsp...@gm...> wrote:
> Ah well - why not write a shell script to curl the remote db and curl again
> to PUT or POST into eXist? Use cron or some other scheduling system and just
> let it go to work. Sounds like an interesting job. You can POST to a query
> for any post-processing.
>
> and pardon my dodgy loop - I accidentally left the false() in it.
>
> On 16 Apr 2015, at 8:06 pm, Jonathan Rowell <big...@ho...> wrote:
>
> Hi Alister,
>
> thanks for the reply. I was suspecting something like this. The problem is
> that the tail recursion must be optimized, otherwise a stack overflow will
> occur.
> In the actual case the DoSomething contacts a server which sends a couple of
> hundred records, each becomming a document in eXist, and the count is in
> fact a time constraint, since the access may only be done during certain
> hours. The database (the first one) contains over 280,000 records, other
> databases have two to three times that and one has over 4 million records.
> At 200 a time that's a thousand recursions and I doubt whether an XQuery
> engine will handle that. Tail recursion elimination is not guarenteed in the
> specs.
>
>
>
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-- 
Adam Retter

eXist Developer
{ United Kingdom }
ad...@ex...
irc://irc.freenode.net/existdb