net.sf.saffron.oj.rel
Class SingleTerminatorRel

java.lang.Object
  |
  +--net.sf.saffron.rel.SaffronRel
        |
        +--net.sf.saffron.rel.SingleRel
              |
              +--net.sf.saffron.oj.rel.SingleTerminatorRel

All Implemented Interfaces:

TerminatorRel

Direct Known Subclasses:

ForTerminatorRel

public abstract class SingleTerminatorRel

extends SingleRel

implements TerminatorRel

A SingleTerminatorRel is an abstract base for Terminators with one input.

Field Summary

Fields inherited from class net.sf.saffron.rel.SingleRel

child

Fields inherited from class net.sf.saffron.rel.SaffronRel

cluster, digest, id, rowType

Constructor Summary

(package private)

SingleTerminatorRel(VolcanoCluster cluster, SaffronRel child)

Method Summary

PlanCost	computeSelfCost(SaffronPlanner planner) Returns the cost of this plan (not including children).
protected SaffronType	deriveRowType()
CallingConvention	getConvention() Returns a value from CallingConvention.

Methods inherited from class net.sf.saffron.rel.SingleRel

childrenAccept, explain, getInputs, getRows, replaceInput

Methods inherited from class net.sf.saffron.rel.SaffronRel

clone, computeDigest, getChildExps, getCluster, getCorrelVariable, getId, getInput, getOrCreateCorrelVariable, getQualifier, getQuery, getRelTypeName, getRowType, getTable, getVariablesStopped, implement, implementFieldAccess, isAccessTo, isDistinct, onRegister, recomputeDigest, register, registerCorrelVariable, setCorrelVariable, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

SingleTerminatorRel

SingleTerminatorRel(VolcanoCluster cluster,
                    SaffronRel child)

Method Detail

getConvention

public CallingConvention getConvention()

Description copied from class: SaffronRel

Returns a value from CallingConvention.

Overrides:

getConvention in class SaffronRel

computeSelfCost

public PlanCost computeSelfCost(SaffronPlanner planner)

Description copied from class: SaffronRel

Returns the cost of this plan (not including children). The base implementation throws an error; derived classes should override.

Overrides:

computeSelfCost in class SaffronRel

deriveRowType

protected SaffronType deriveRowType()

Overrides:

deriveRowType in class SingleRel