Package 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:

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

prev

Constructor Summary

Constructors

Constructor	Description
CountFromClassStep(OIdentifier targetClass, String alias)

Method Summary

Modifier and Type	Method	Description
boolean	canBeCached()
OExecutionStream	internalStart(OCommandContext ctx)
String	prettyPrint(OPrintContext ctx)

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

getPrev, setPrevious, start

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

copy, deserialize, getName, getSubExecutionPlans, getSubSteps, getTargetNode, getType, serialize, serializeToResult, toResult, toResult

Constructor Details

CountFromClassStep

public CountFromClassStep(OIdentifier targetClass,
 String alias)

Parameters:

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

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

Method Details

internalStart

public OExecutionStream internalStart(OCommandContext ctx)
                               throws OTimeoutException

Specified by:

internalStart in class AbstractExecutionStep

Throws:

OTimeoutException

prettyPrint

public String prettyPrint(OPrintContext ctx)

canBeCached

public boolean canBeCached()