Package com.orientechnologies.orient.core.sql.executor

Class CopyRecordContentBeforeUpdateStep

java.lang.Object

com.orientechnologies.orient.core.sql.executor.AbstractExecutionStep

com.orientechnologies.orient.core.sql.executor.CopyRecordContentBeforeUpdateStep

All Implemented Interfaces:

OExecutionStep, OExecutionStepInternal

public class CopyRecordContentBeforeUpdateStep
extends AbstractExecutionStep

Reads an upstream result set and returns a new result set that contains copies of the original OResult instances

This is mainly used from statements that need to copy of the original data before modifying it, eg. UPDATE ... RETURN BEFORE

Author:

Luigi Dell'Aquila (l.dellaquila-(at)-orientdb.com)

Field Summary

Fields inherited from class com.orientechnologies.orient.core.sql.executor.AbstractExecutionStep

ctx, next, prev, profilingEnabled, timedOut

Constructor Summary

Constructors

Constructor	Description
CopyRecordContentBeforeUpdateStep(OCommandContext ctx, boolean profilingEnabled)

Method Summary

Modifier and Type	Method	Description
long	getCost()	returns the absolute cost (in nanoseconds) of the execution of this step
String	prettyPrint(int depth, int indent)
OResultSet	syncPull(OCommandContext ctx, int nRecords)

Methods inherited from class com.orientechnologies.orient.core.sql.executor.AbstractExecutionStep

close, getContext, getCostFormatted, getNext, getPrev, isProfilingEnabled, 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.orientechnologies.orient.core.sql.executor.OExecutionStep

toResult

Methods inherited from interface com.orientechnologies.orient.core.sql.executor.OExecutionStepInternal

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

Constructor Details

CopyRecordContentBeforeUpdateStep

public CopyRecordContentBeforeUpdateStep(OCommandContext ctx,
 boolean profilingEnabled)

Method Details

syncPull

public OResultSet syncPull(OCommandContext ctx,
 int nRecords)
                    throws OTimeoutException

Throws:

OTimeoutException

prettyPrint

public String prettyPrint(int depth,
 int indent)

getCost

public long getCost()

Description copied from interface: OExecutionStep

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