Package com.arcadedb.query.sql.executor

Class AbstractTraverseStep

java.lang.Object

com.arcadedb.query.sql.executor.AbstractExecutionStep

com.arcadedb.query.sql.executor.AbstractTraverseStep

All Implemented Interfaces:

ExecutionStep, ExecutionStepInternal

Direct Known Subclasses:

BreadthFirstTraverseStep, DepthFirstTraverseStep

public abstract class AbstractTraverseStep
extends AbstractExecutionStep

Created by luigidellaquila on 26/10/16.

Field Summary

Fields

Modifier and Type	Field	Description
protected List<Result>	entryPoints
protected PInteger	maxDepth
protected List<TraverseProjectionItem>	projections
protected List<Result>	results
protected WhereClause	whileClause

Fields inherited from class com.arcadedb.query.sql.executor.AbstractExecutionStep

ctx, next, prev, profilingEnabled, timedOut

Constructor Summary

Constructors

Constructor	Description
AbstractTraverseStep(List<TraverseProjectionItem> projections, WhereClause whileClause, PInteger maxDepth, CommandContext ctx, boolean profilingEnabled)

Method Summary

Modifier and Type	Method	Description
protected abstract void	fetchNextEntryPoints(CommandContext ctx, int nRecords)
protected abstract void	fetchNextResults(CommandContext ctx, int nRecords)
long	getCost()	returns the absolute cost (in nanoseconds) of the execution of this step
protected boolean	isFinished()
ResultSet	syncPull(CommandContext ctx, int nRecords)

Methods inherited from class com.arcadedb.query.sql.executor.AbstractExecutionStep

close, getContext, getCostFormatted, getNext, getPrev, isProfilingEnabled, isTimedOut, sendTimeout, setNext, setPrevious, setProfilingEnabled

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.arcadedb.query.sql.executor.ExecutionStep

toResult

Methods inherited from interface com.arcadedb.query.sql.executor.ExecutionStepInternal

canBeCached, copy, deserialize, getDescription, getName, getSubExecutionPlans, getSubSteps, getTargetNode, getType, prettyPrint, reset, serialize

Field Detail

whileClause

protected final WhereClause whileClause

projections

protected final List<TraverseProjectionItem> projections

maxDepth

protected final PInteger maxDepth

entryPoints

protected List<Result> entryPoints

results

protected final List<Result> results

Constructor Detail

AbstractTraverseStep

public AbstractTraverseStep(List<TraverseProjectionItem> projections,
                            WhereClause whileClause,
                            PInteger maxDepth,
                            CommandContext ctx,
                            boolean profilingEnabled)

Method Detail

syncPull

public ResultSet syncPull(CommandContext ctx,
                          int nRecords)

fetchNextEntryPoints

protected abstract void fetchNextEntryPoints(CommandContext ctx,
                                             int nRecords)

fetchNextResults

protected abstract void fetchNextResults(CommandContext ctx,
                                         int nRecords)

isFinished

protected boolean isFinished()

getCost

public long getCost()

Description copied from interface: ExecutionStep

returns the absolute cost (in nanoseconds) of the execution of this step

Returns:

the absolute cost (in nanoseconds) of the execution of this step, -1 if not calculated