9.2. VDB Definition: The VDB Element

Attributes

• name
  The name of the VDB. The VDB name referenced through the driver or datasource during the connection time.
• version
  The 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-metadata
  Can 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-timeout
  Sets 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.
• lib
  Set 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.