saffron.rel.java
Class SingleTerminator

java.lang.Object
  |
  +--saffron.rel.Rel
        |
        +--saffron.rel.SingleRel
              |
              +--saffron.rel.java.SingleTerminator

All Implemented Interfaces:

Terminator

Direct Known Subclasses:

ForTerminator

public abstract class SingleTerminator

extends SingleRel

implements Terminator

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

Nested Class Summary

Nested classes inherited from class saffron.rel.Rel

Field Summary

Fields inherited from class saffron.rel.SingleRel

child

Fields inherited from class saffron.rel.Rel

cluster, digest, id, rowType

Constructor Summary

(package private)

SingleTerminator(Cluster cluster, Rel child)

Method Summary

Cost	computeSelfCost(Planner planner) Returns the cost of this plan (not including children).
protected Type	deriveRowType()
CallingConvention	getConvention() Returns a value from CallingConvention.

Methods inherited from class saffron.rel.SingleRel

childrenAccept, explain, getInputs, replaceInput

Methods inherited from class saffron.rel.Rel

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

Methods inherited from class java.lang.Object

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

Constructor Detail

SingleTerminator

SingleTerminator(Cluster cluster,
                 Rel child)

Method Detail

deriveRowType

protected Type deriveRowType()

Overrides:

deriveRowType in class SingleRel

computeSelfCost

public Cost computeSelfCost(Planner planner)

Description copied from class: Rel

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

Overrides:

computeSelfCost in class Rel

getConvention

public CallingConvention getConvention()

Description copied from class: Rel

Returns a value from CallingConvention.

Overrides:

getConvention in class Rel