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→Limitations
As XQuery is a very powerful language, deciding which databases will be accessed by a query is non-trivial. Optimization is work in progress. Databases locked by a query are listed in the GUI's [[GUI#Visualizations|Info View]] and on the command line client if [[Options#QUERYINFO|QUERYINFO]] is set. If you think too much is locked, please give us a note on our [http://basex.org/open-source/ mailing list] with some example code.
The current identification of which databases to lock is limited to [[commands]] using no glob syntax and queries that access the currently opened database, XQuery functions that explicitly specify a database, or and expressions that address no database at all.
Some examples on database-locking enabled commands and queries:
* {{Code|CREATE DB newdb}}, write-locking of "newdb"
