org.datanucleus.query.compiler

Class QueryCompilerOptimiser

java.lang.Object

org.datanucleus.query.compiler.QueryCompilerOptimiser

public class QueryCompilerOptimiser
extends Object

Optimiser for a query compilation. Attempts to detect and correct common input problems to give a more efficiently evaluated query. Currently handles the following

• When the user specifies "var == this", this means nothing since the variable is the same as the candidate so replaces all instances of the variable with the candidate

Constructor Summary

Constructors

Constructor and Description
QueryCompilerOptimiser(QueryCompilation compilation)

Method Summary

Methods

Modifier and Type	Method and Description
void	optimise() Method to perform the optimisation.

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryCompilerOptimiser

public QueryCompilerOptimiser(QueryCompilation compilation)

Method Detail

optimise

public void optimise()

Method to perform the optimisation.