org.apache.derby.impl.tools.optional
Class OptimizerTracer

java.lang.Object
  org.apache.derby.impl.tools.optional.OptimizerTracer

All Implemented Interfaces:

OptionalTool

public class OptimizerTracer
extends java.lang.Object
implements OptionalTool

OptionalTool to create wrapper functions and views for all of the user tables in a foreign database.

Constructor Summary

OptimizerTracer()
0-arg constructor required by the OptionalTool contract

Method Summary

void	loadTool(java.lang.String... configurationParameters) Turns on optimizer tracing.
void	unloadTool(java.lang.String... configurationParameters) Dump the optimizer trace and turn off tracing.
private java.sql.SQLException	wrap(java.lang.Throwable t) Wrap an exception in a SQLException

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OptimizerTracer

public OptimizerTracer()

0-arg constructor required by the OptionalTool contract

Method Detail

loadTool

public void loadTool(java.lang.String... configurationParameters)
              throws java.sql.SQLException

Turns on optimizer tracing.

Specified by:

loadTool in interface OptionalTool

Throws:

java.sql.SQLException

unloadTool

public void unloadTool(java.lang.String... configurationParameters)
                throws java.sql.SQLException

Dump the optimizer trace and turn off tracing. Takes optional parameters:

• fileName - Where to write the optimizer trace. If omitted, the trace is written to System.out.

Specified by:

unloadTool in interface OptionalTool

Throws:

java.sql.SQLException

wrap

private java.sql.SQLException wrap(java.lang.Throwable t)

Wrap an exception in a SQLException