vishnu.planner
Class CannonicalPlanner

java.lang.Object
  vishnu.planner.CannonicalPlanner

All Implemented Interfaces:

Planner

public final class CannonicalPlanner
extends java.lang.Object
implements Planner

Esta clase implementa un planificador canonico de instrucciones SQL.

Author:

Mariano Tepper y Hernan Rancati TODO usar la fabrica de algoritmos.

Nested Class Summary

static class

CannonicalPlanner.Context

Method Summary

protected java.util.Collection	asCollection(int index)
protected java.util.List<java.lang.String>	asList(java.lang.String name)
protected java.lang.String	columnRename(java.lang.String columnName)
java.lang.String	getExecutionPlan() retorna el plan de ejecucion para el ultimo comando asignado.
static CannonicalPlanner	getInstance()
Relation	getRelation() retorna la expresion en algebra relacional planificada.
protected Relation	getRelationForTable(java.lang.String tableName)
protected java.lang.String	selectedColumnName(SelectStatement s)
static void	setContext(CannonicalPlanner.Context c)
void	setStatement(SQLStatement s) asigna el comando a planificar.
protected SQLOperand	translateExpression(SQLOperand o, java.util.List<SelectStatement> i) transforma los operadores IN en igualdades
protected Relation	translateRelation(SelectStatement s)

Methods inherited from class java.lang.Object

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

Method Detail

setContext

public static void setContext(CannonicalPlanner.Context c)

getInstance

public static CannonicalPlanner getInstance()
                                     throws vishnu.planner.CannonicalPlanner.ContextRequiredException

Throws:

vishnu.planner.CannonicalPlanner.ContextRequiredException

setStatement

public void setStatement(SQLStatement s)

Description copied from interface: Planner

asigna el comando a planificar.

Specified by:

setStatement in interface Planner

asCollection

protected java.util.Collection asCollection(int index)

asList

protected java.util.List<java.lang.String> asList(java.lang.String name)

translateRelation

protected Relation translateRelation(SelectStatement s)

columnRename

protected java.lang.String columnRename(java.lang.String columnName)

selectedColumnName

protected java.lang.String selectedColumnName(SelectStatement s)

translateExpression

protected SQLOperand translateExpression(SQLOperand o,
                                         java.util.List<SelectStatement> i)

transforma los operadores IN en igualdades

getRelationForTable

protected Relation getRelationForTable(java.lang.String tableName)

getExecutionPlan

public java.lang.String getExecutionPlan()

Description copied from interface: Planner

retorna el plan de ejecucion para el ultimo comando asignado.

Specified by:

getExecutionPlan in interface Planner

getRelation

public Relation getRelation()

Description copied from interface: Planner

retorna la expresion en algebra relacional planificada.

Specified by:

getRelation in interface Planner