Xqdatasource xml file

String username, java. String passwd Attempts to establish a connection to an XML datasource using the supplied username and password.

String name Returns the current value of the named property if set, else null. Optimistic type checking will fail whenever the derived type of an expression does not intersect the expected type. More simply put, pessimistic mode raises an error at compile time if a type might not be correct at runtime. Optimistic mode, on the other hand, only raises an error at compile time when the runtime type check will certainly fail. A property that when set to "true" , debugging will be enabled; otherwise, debugging will be disabled.

For example, XQItemAccessor. If the query processor needs to materialize intermediate results while processing the query, it will use the PageManager. In this case, all pages will be released deleted by the time the corresponding XQResultSequence is closed.

PageManager Using external storage may drastically reduce the main memory needed to process a query but it may also make query processing take longer.

This is intended for use in cases where multiple threads access the connection and the synchronization needed to track open expressions causes performance problems. When expression tracking is disabled, an attempt to call XQConnection. An XQJ implementation is not required to support this method. If it is not supported, then an exception XQException is thrown. A value of zero specifies that the timeout is the default system timeout if there is one; otherwise, it specifies that there is no timeout.

When a XQDataSource object is created, the login timeout is initially zero. It is implementation-defined whether the specified login timeout is actually used by the data source implementation.

A value of zero means that the timeout is the default system timeout if there is one; otherwise, it means that there is no timeout.

Was this information helpful? Yes No. Thank you! Any more feedback? The more you tell us the more we can help. Can you help us improve? Resolved my issue. Clear instructions. Easy to follow. No jargon. Pictures helped. Didn't match my screen. This is not necessarily wrong — there are scenarios in which hard-coding the underlying XQJ implementation makes sense — but it's not always desirable.

After all, one of the benefits of XQJ is the ability to make your applications independent from the underlying XQuery implementation. How can we achieve that? We'll show two approaches:. Using such property files, an application can easily abstract out any hard-coded dependencies on the underlying XQJ implementation.

The XQDataSource class is loaded through reflection and the next step is to simply provide the property file:.