You still could use the Java Bindings. -- Andreas
Am 23.05.2012 um 14:23 schrieb Christian Grün: >> I sometimes find myself, in code, wanting to create a database, or more >> specifically test if a database exists and create it if does not. The >> database module appears not have functions to create (or delete databases). >> Is this a deliberate design decision? > > Indeed it is; but we are still looking for a good solution to fill > this obvious gap. Even if databases are pretty light-weight entities > in BaseX, the creation of a new database within an XQuery expression > may trigger numerous side effects related to other database > operations. The main reason for that is the functional nature of > XQuery and the "pending update list" of XQuery Update: all updating > commands will become effective after the query itself has been > evaluated. However, commands like db:add() or db:delete() commands > will (currently) only end up on the list if the addressed database > already exists. Another example: db:create() could overwrite a > database that already existed, and some commands would possibly refer > to the old instance, while other updating commands would access the > new one. > > One general solution to this challenge would be the XQuery Scripting > Extension [1], which allows you to execute commands sequentially > (i.e., in an imperative manner). XQSE is definitely on our list, but > which will require considerable time to realize -- mainly because a > straightforward implementation would sabotage many of the existing > functional optimizations in the code (some of the functional and > imperative optimizations are even diametrical). > > In summary, I cannot give a satifsying answer yet except for the > advice to use the BaseX commands, REST or XQJ (via > XQExpression.executeCommand()), but I'm very open to ideas and > proposals how to tackle this challenge. > > Christian > > [1] http://www.w3.org/TR/xquery-sx-10/ > _______________________________________________ > BaseX-Talk mailing list > [email protected] > https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk _______________________________________________ BaseX-Talk mailing list [email protected] https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk
