saffron.rel.java
Class JavaNestedLoopJoin

java.lang.Object
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  +--saffron.rel.Rel
        |
        +--saffron.rel.Join
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              +--saffron.rel.java.JavaNestedLoopJoin

public class JavaNestedLoopJoin

extends Join

JavaNestedLoopJoin implements Join using the nested-loop algorithm, with output as code.

Nested Class Summary

Nested classes inherited from class saffron.rel.Join

Join.JoinType

Nested classes inherited from class saffron.rel.Rel

Field Summary

Fields inherited from class saffron.rel.Join

condition, joinType, left, right, variablesStopped

Fields inherited from class saffron.rel.Rel

cluster, digest, id, rowType

Constructor Summary

JavaNestedLoopJoin(Cluster cluster, Rel left, Rel right, Expression condition, int joinType, Set variablesStopped)

Method Summary

Object	clone()
Cost	computeSelfCost(Planner planner) Returns the cost of this plan (not including children).
CallingConvention	getConvention() Returns a value from CallingConvention.
Object	implement(Implementor implementor, int ordinal) Create a plan for this expression according to a calling convention.
Expression	implementSelf(Implementor implementor) Returns a Java expression which yields the current row of this relational expression.

Methods inherited from class saffron.rel.Join

childrenAccept, deriveRowType, explain, getChildExps, getCondition, getInputs, getJoinType, getLeft, getRight, getVariablesStopped, register, registerStoppedVariable, replaceInput, setVariablesStopped, switchJoinType

Methods inherited from class saffron.rel.Rel

computeDigest, getCluster, getCorelVariable, getEnvironment, getId, getInput, getOrCreateCorelVariable, getParentEnv, getQualifier, getQuery, getRelTypeName, getRows, getRowType, getTable, getType, implementExp, implementExps, implementFieldAccess, 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

JavaNestedLoopJoin

public JavaNestedLoopJoin(Cluster cluster,
                          Rel left,
                          Rel right,
                          Expression condition,
                          int joinType,
                          Set variablesStopped)

Method Detail

clone

public Object clone()

Overrides:

clone in class Join

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

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.

implementSelf

public Expression implementSelf(Implementor implementor)

Returns a Java expression which yields the current row of this relational expression.

Overrides:

implementSelf in class Rel

See Also:

Implementor#bind(Rel,Rel)