com.orientechnologies.orient.core.sql.executor

Class CountStep

java.lang.Object

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

com.orientechnologies.orient.core.sql.executor.CountStep

All Implemented Interfaces:

OExecutionStep, OExecutionStepInternal

public class CountStep
extends AbstractExecutionStep

Counts the records from the previous steps. Returns a record with a single property, called "count" containing the count of records received from pervious steps

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 and Description
CountStep(OCommandContext ctx, boolean profilingEnabled)

Method Summary

Modifier and Type	Method and Description
boolean	canBeCached()
OExecutionStep	copy(OCommandContext ctx)
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.OExecutionStepInternal

basicDeserialize, basicSerialize, deserialize, getDescription, getIndent, getName, getSubExecutionPlans, getSubSteps, getTargetNode, getType, reset, serialize

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

toResult

Constructor Detail

CountStep

public CountStep(OCommandContext ctx,
                 boolean profilingEnabled)

Parameters:

ctx - the query context

profilingEnabled - true to enable the profiling of the execution (for SQL PROFILE)

Method Detail

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

canBeCached

public boolean canBeCached()

copy

public OExecutionStep copy(OCommandContext ctx)