-
Language:
English
-
Language:
English
Red Hat Training
A Red Hat training course is available for Red Hat JBoss Data Virtualization
9.2. VDB Definition: The VDB Element
Attributes
- nameThe name of the VDB. The VDB name referenced through the driver or datasource during the connection time.
- versionThe version of the VDB (should be an positive integer). This determines the deployed directory location (see Name), and provides an explicit versioning mechanism to the VDB name.
Property Elements
- cache-metadataCan be "true" or "false". If "false", JBoss Data Virtualization will obtain metadata once for every launch of the VDB. "true" will save a file containing the metadata into the
EAP_HOME/MODE/data
directory. Defaults to "false" for-vdb.xml
deployments otherwise "true". - query-timeoutSets the default query timeout in milliseconds for queries executed against this VDB. 0 indicates that the server default query timeout should be used. Defaults to 0. Will have no effect if the server default query timeout is set to a lesser value. Note that clients can still set their own timeouts that will be managed on the client side.
- libSet to a list of modules for the VDB classpath for user defined function loading. See also Support for Non-Pushdown User Defined Functions in Red Hat JBoss Data Virtualization Development Guide: Server Development.