com.orientechnologies.orient.core.sql.executor

Class CountFromClassStep

java.lang.Object

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

com.orientechnologies.orient.core.sql.executor.CountFromClassStep

All Implemented Interfaces:

OExecutionStep, OExecutionStepInternal

public class CountFromClassStep
extends AbstractExecutionStep

Returns the number of records contained in a class (including subclasses) Executes a count(*) on a class and returns a single record that contains that value (with a specific alias).

Author:

Luigi Dell'Aquila (luigi.dellaquila - at - gmail.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
CountFromClassStep(OIdentifier targetClass, String alias, OCommandContext ctx, boolean profilingEnabled)

Method Summary

Modifier and Type	Method and Description
boolean	canBeCached()
long	getCost() returns the absolute cost (in nanoseconds) of the execution of this step
String	prettyPrint(int depth, int indent)
void	reset()
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, copy, deserialize, getDescription, getIndent, getName, getSubExecutionPlans, getSubSteps, getTargetNode, getType, serialize

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

toResult

Constructor Detail

CountFromClassStep

public CountFromClassStep(OIdentifier targetClass,
                          String alias,
                          OCommandContext ctx,
                          boolean profilingEnabled)

Parameters:

targetClass - An identifier containing the name of the class to count

alias - the name of the property returned in the result-set

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

reset

public void reset()

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()