public class OptimizerTrace
extends java.lang.Object
This class provides static methods for controlling the optimizer tracing in a Derby database.
Constructor | Description |
---|---|
OptimizerTrace() |
Modifier and Type | Method | Description |
---|---|---|
static java.lang.String |
getOptimizerTraceOutput() |
Get the optimizer trace output for the last optimized query as a String.
|
static OptTrace |
getOptimizerTracer() |
Get the current optimizer tracer, if any.
|
static void |
setOptimizerTrace(boolean onOrOff) |
Turn default optimizer tracing on or off.
|
static void |
setOptimizerTracer(OptTrace tracer) |
Install an optimizer tracer (to enable tracing) or uninstall the current optimizer tracer
(to disable tracing).
|
public static void setOptimizerTrace(boolean onOrOff)
onOrOff
- Whether to turn optimizer tracing on (true) or off (false).public static void setOptimizerTracer(OptTrace tracer)
tracer
- Null if tracing is being turned off, otherwise an optimizer tracerpublic static OptTrace getOptimizerTracer()
public static java.lang.String getOptimizerTraceOutput()
Apache Derby V10.14 Internals - Copyright © 2004,2018 The Apache Software Foundation. All Rights Reserved.