org.apache.derby.impl.sql.compile

Class OptTraceViewer

java.lang.Object

org.apache.derby.impl.sql.compile.OptTraceViewer

All Implemented Interfaces:

OptionalTool

public class OptTraceViewer
extends java.lang.Object
implements OptionalTool

OptionalTool for viewing the output created when you xml-trace the optimizer.

Constructor Summary

Constructors

Constructor and Description
OptTraceViewer() 0-arg constructor required by the OptionalTool contract

Method Summary

Modifier and Type	Method and Description
void	loadTool(java.lang.String... configurationParameters) Takes the following arguments:
void	unloadTool(java.lang.String... configurationParameters) Drop the schema objects which were created for viewing the xml file containing the optimizer trace.

Methods inherited from class java.lang.Object

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

Constructor Detail

OptTraceViewer

public OptTraceViewer()

0-arg constructor required by the OptionalTool contract

Method Detail

loadTool

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

Takes the following arguments:

• fileURL - The url of the file holding the xml trace. E.g.: "file:///Users/me/mainline/z.txt"

...and creates the following schema objects for viewing the xml trace of the optimizer:

• ArrayList - A user-defined type wrapping java.util.ArrayList.
• asList - A factory function for creating ArrayLists.
• planCost - An XmlVTI for viewing xml traces.
• planCost - A view which passes the file name to the XmlVTI.

Specified by:

loadTool in interface OptionalTool

Throws:

java.sql.SQLException

unloadTool

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

Drop the schema objects which were created for viewing the xml file containing the optimizer trace.

Specified by:

unloadTool in interface OptionalTool

Throws:

java.sql.SQLException