org.teiid.query.processor.relational
Class SortUtility

java.lang.Object
  org.teiid.query.processor.relational.SortUtility

public class SortUtility
extends java.lang.Object

Implements several modes of a multi-pass sort.

Nested Class Summary

static class

SortUtility.Mode

Constructor Summary

SortUtility(TupleSource sourceID, java.util.List<OrderByItem> items, SortUtility.Mode mode, BufferManager bufferMgr, java.lang.String groupName, java.util.List schema)

SortUtility(TupleSource ts, java.util.List expressions, java.util.List<java.lang.Boolean> types, SortUtility.Mode mode, BufferManager bufferManager, java.lang.String connectionID, java.util.List schema)

Method Summary

protected void	initialSort() creates sorted sublists stored in tuplebuffers
boolean	isDistinct()
boolean	isDone()
protected void	mergePhase()
TupleBuffer	sort()

Methods inherited from class java.lang.Object

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

Constructor Detail

SortUtility

public SortUtility(TupleSource sourceID,
                   java.util.List<OrderByItem> items,
                   SortUtility.Mode mode,
                   BufferManager bufferMgr,
                   java.lang.String groupName,
                   java.util.List schema)

SortUtility

public SortUtility(TupleSource ts,
                   java.util.List expressions,
                   java.util.List<java.lang.Boolean> types,
                   SortUtility.Mode mode,
                   BufferManager bufferManager,
                   java.lang.String connectionID,
                   java.util.List schema)

Method Detail

isDone

public boolean isDone()

sort

public TupleBuffer sort()
                 throws TeiidComponentException,
                        TeiidProcessingException

Throws:

TeiidComponentException

TeiidProcessingException

initialSort

protected void initialSort()
                    throws TeiidComponentException,
                           TeiidProcessingException

creates sorted sublists stored in tuplebuffers

Throws:

TeiidComponentException

TeiidProcessingException

mergePhase

protected void mergePhase()
                   throws TeiidComponentException,
                          TeiidProcessingException

Throws:

TeiidComponentException

TeiidProcessingException

isDistinct

public boolean isDistinct()