public class OptimizerTrace
extends java.lang.Object
This class provides static methods for controlling the optimizer tracing in a Derby database.
Constructor and Description |
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OptimizerTrace() |
Modifier and Type | Method and Description |
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static java.lang.String |
getOptimizerTraceOutput()
Get the optimizer trace output for the last optimized query as a String.
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static void |
nullifyTrace()
Null out the optimizer trace.
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static boolean |
setOptimizerTrace(boolean onOrOff)
Control whether or not optimizer trace is on.
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static boolean |
setOptimizerTraceHtml(boolean onOrOff)
Control whether or not optimizer trace is generated in html.
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static boolean |
writeOptimizerTraceOutputHtml(java.lang.String fileName)
Send the optimizer trace output for the last optimized query to a file with a .html extension.
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public static boolean setOptimizerTrace(boolean onOrOff)
onOrOff
- Whether to turn optimizer trace on (true) or off (false).public static void nullifyTrace() throws java.sql.SQLException
java.sql.SQLException
public static boolean setOptimizerTraceHtml(boolean onOrOff)
onOrOff
- Whether or not optimizer trace will be in html (true) or not (false).public static java.lang.String getOptimizerTraceOutput()
public static boolean writeOptimizerTraceOutputHtml(java.lang.String fileName)
fileName
- The name of the file to write to. (.html extension will be added.)Apache Derby V10.10 Internals - Copyright © 2004,2013 The Apache Software Foundation. All Rights Reserved.