Changes

The options listed on this page influence the way how database [[Commands|commands]] are executed and XQuery expressions are evaluated. Options are divided into [[#Global Options|'''global options''']], which are valid for all BaseX instances, and '''local options''', which are specific to a client or session. Values Two kinds of options are either ''strings'', ''numbers'' or ''booleans''.exist:

Various ways exist * '''[[#Global Options|Global Options]]''' are valid for all BaseX instances in the same JVM. This is particularly relevant if you are working with the client/server architecture.* '''Local options''' (all remaining ones) are specific to access and change options:a client or session.

* The current value Values of an option can be requested with the {{Command|GET}} command. Local options can be changed via {{Command|SET}}. All values are either ''strings'', ''numbers'static' or ''booleans'': They stay valid until they . Options are changed once again by another operation. If an option is of type ''booleanstatic'', and if no value is specifiednot bound to a single operation (for example, its current value will be invertedthe next command).Various ways exist to access and change options:

* The current value of an option can be requested with the {{Command|GET}} command. Local options can be changed via {{Command|SET}} (all global options, except for {{Option|DEBUG}}, can only be changed at startup time). If an option is of type ''boolean'', and if no value is specified, its current value will be inverted. * The {{Code|.basex}} [[Configuration#Configuration Files|configuration file]] is parsed by every new local BaseX instance. It contains all global options. Local options can be specified at the end of the file after the "{{Code|Local Options" }} comment:

|If this option is turned on, new databases will be exclusively created in main memory. :* Most queries will be evaluated faster in main -memory mode, but all data is lost if the BaseX instance in which the database was created is shut down. The value of this option * It is not possible to store binary resources in a main-memory database.* A main-memory database will be assigned once have no disk representation. However, it is possible to export the database via the {{Command|EXPORT}} command, and create a new databasefrom the exported file in a second step.* This option will not be available for [[Database Module#db:create|db:create]], and cannot because the database would not be changed accessible anymore after thatdatabase creation, i. e., outside the query scope.