saffron.rel.plan
Class PlanFilter

java.lang.Object
  |
  +--saffron.rel.Rel
        |
        +--saffron.rel.SingleRel
              |
              +--saffron.rel.Filter
                    |
                    +--saffron.rel.plan.PlanFilter

public class PlanFilter

extends Filter

PlanFilter implements Filter as a Plan object.

Nested Class Summary

Nested classes inherited from class saffron.rel.Filter

Nested classes inherited from class saffron.rel.Rel

Field Summary

Fields inherited from class saffron.rel.Filter

condition

Fields inherited from class saffron.rel.SingleRel

child

Fields inherited from class saffron.rel.Rel

cluster, digest, id, rowType

Constructor Summary

PlanFilter(Cluster cluster, Rel child, Expression condition)

Method Summary

Object	clone()
CallingConvention	getConvention() Returns a value from CallingConvention.
Object	implement(Implementor implementor, int ordinal) Create a plan for this expression according to a calling convention.

Methods inherited from class saffron.rel.Filter

computeSelfCost, explain, getChildExps, register

Methods inherited from class saffron.rel.SingleRel

childrenAccept, deriveRowType, getInputs, replaceInput

Methods inherited from class saffron.rel.Rel

computeDigest, getCluster, getCorelVariable, getEnvironment, getId, getInput, getOrCreateCorelVariable, getParentEnv, getQualifier, getQuery, getRelTypeName, getRows, getRowType, getTable, getType, getVariablesStopped, implementExp, implementExps, implementFieldAccess, implementSelf, isAccessTo, isDistinct, onRegister, recomputeDigest, registerCorelVariable, setCorelVariable, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

PlanFilter

public PlanFilter(Cluster cluster,
                  Rel child,
                  Expression condition)

Method Detail

clone

public Object clone()

Overrides:

clone in class Filter

getConvention

public CallingConvention getConvention()

Description copied from class: Rel

Returns a value from CallingConvention.

Overrides:

getConvention in class Rel

implement

public Object implement(Implementor implementor,
                        int ordinal)

Description copied from class: Rel

Create a plan for this expression according to a calling convention.

Overrides:

implement in class Rel

Parameters:

implementor - implementor

ordinal - indicates our position in the pre-, in- and postfix walk over the tree; ordinal is -1 when called from the parent, and i when called from the i^th child.