[Monetdb-developers] MonetDB release planning

Stefan Manegold Stefan.Manegold at cwi.nl
Fri May 16 20:32:53 CEST 2008


Dear fellow MonetDB developers,

this is to keep you up-to-date about the short-term release plans for the
MonetDB product family as they have recently been discussed here at CWI in
A'dam.

Please read until the end.
Thank you very much in advance for your patience ans cooperation!


Triggered by (1) the major progress in extending the functionality of the
new "Algebra back-end" based version of Pathfinder (MonetDB/XQuery) to
(almost) meet the functionality as provided by the (til date) default
"milprint_summer back-end" based version (see details below), and (2) the
desire of at least one distinct client to use the new "Algebra back-end"
based version of Pathfinder (MonetDB/XQuery), we plan to have a new release
of Pathfinder (MonetDB/XQuery), soon.

Unfortunately, the functionality of the new "Algebra back-end" based version
of Pathfinder (MonetDB/XQuery) is not yet identical with that of the (til
date) default "milprint_summer back-end" based version. First of all,
extensions beyond the XQuery and XQuery Updates standards, such as XRpc,
StandOff, and pre-compiled XQuery modules ("MIL modules") are not supported,
as well as recursive user-defined functions are not supported, yet.
(The not yet working id/idref functionality is currently being implemented.)
Moreover, the XQuery Update functionality is not yet complete/correct, as it
cannot yet handle inserts of node who's type is not statically known at query
compile time.
In particular the latter shortcoming currently keeps us from our original
plans of making the new "Algebra back-end" the default in the upcoming
release. Hence, most probably, the upcoming release will still come with the
"milprint_summer back-end" set as default. However, as already in the latest
release, runtime options allow users to easily enable the new "Algebra
back-end".

Some (internal) API changes on the development trunk since the last release
(mainly the signatures of GDK functions BAT_select(), BATmmap() &
BATmadvice()), prohibit a new "feature release" of pathfinder, only, as this
is incompatible with currently available releases of MonetDB4 (Server) and
MonetDB (Common).
Hence, also this upcoming release will be a "complete" one, i.e., all
MonetDB related packages (MonetDB Common, Clients, MonetDB4 Server, MonetDB5
Server, MonetDB/SQL, MonetDB/Geom & MonetDB/XQuery will (have to be)
released.


Given this, our plan is as follows:

Within the next week, we will fork new "Stable" branches of the current
development trunks.
Please let us know at your earliest convenience, in case you have new feature
developments "in the pipe", that should go into the new release.
In case you have just started new "cutting edge" developments that are still
far from mature to be released soon, please refrain from checking them in
until the new release branches have been created.

Once the new release branches are created, we plan to spend about one month
on thoroughly testing and stabilizing the new release and its packaging.
Any help from all of you is highly appreciated!
In particular, we count on the support for all "first users" of the new
Pathfinder (MonetDB/XQuery) "Algebra back-end' (even if it will not be the
default choice).

The envisioned release date is "End of June".


Please let us know, in case you have any questions, comments, suggestions,
etc.


Yours Sincerely,
Stefan

-- 
| Dr. Stefan Manegold | mailto:Stefan.Manegold at cwi.nl |
| CWI,  P.O.Box 94079 | http://www.cwi.nl/~manegold/  |
| 1090 GB Amsterdam   | Tel.: +31 (20) 592-4212       |
| The Netherlands     | Fax : +31 (20) 592-4312       |




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