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org.apache.derby.impl.sql.execute
Class DistinctScanResultSet  

java.lang.Object
  org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl
      org.apache.derby.impl.sql.execute.NoPutResultSetImpl
          org.apache.derby.impl.sql.execute.HashScanResultSet
              org.apache.derby.impl.sql.execute.DistinctScanResultSet

All Implemented Interfaces:

org.apache.derby.iapi.sql.execute.CursorResultSet, org.apache.derby.iapi.sql.execute.NoPutResultSet, org.apache.derby.iapi.sql.ResultSet, org.apache.derby.iapi.store.access.RowLocationRetRowSource, org.apache.derby.iapi.store.access.RowSource

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public class DistinctScanResultSet

extends HashScanResultSet

Eliminates duplicates while scanning the underlying conglomerate. (Assumes no predicates, for now.)

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Field Summary
(package private)  java.util.Enumeration	element

 

Fields inherited from class org.apache.derby.impl.sql.execute.HashScanResultSet

activation, beginTime, candidate, checkGM, checkNullCols, clonedExecRow, closeTime, cncLen, compactRow, constructorTime, currentRow, DEFAULT_INITIAL_CAPACITY, DEFAULT_LOADFACTOR, DEFAULT_MAX_CAPACITY, eliminateDuplicates, endExecutionTime, finished, firstNext, forUpdate, hashtable, hashtableSize, heapConglomerate, indent, indexName, isConstraint, isolationLevel, isOpen, isTopResultSet, keyColumns, lcc, lockMode, nextQualifiers, nextTime, numOpens, openTime, optimizerEstimatedCost, optimizerEstimatedRowCount, resultDescription, resultSetNumber, rowsFiltered, rowsSeen, scanProperties, scanQualifiers, scoci, sourceDepth, startExecutionTime, startPositionString, stopPositionString, subIndent, subqueryTrackingArray, tableName, targetResultSet

 

Fields inherited from interface org.apache.derby.iapi.sql.ResultSet

CURRENT_RESULTSET_ONLY, ENTIRE_RESULTSET_TREE, ISAFTERLAST, ISBEFOREFIRST, ISFIRST, ISLAST

 

Fields inherited from interface org.apache.derby.iapi.sql.execute.NoPutResultSet

ABSOLUTE, FIRST, LAST, NEXT, PREVIOUS, RELATIVE

 

Constructor Summary

DistinctScanResultSet(long conglomId, org.apache.derby.iapi.store.access.StaticCompiledOpenConglomInfo scoci, org.apache.derby.iapi.sql.Activation activation, org.apache.derby.iapi.services.loader.GeneratedMethod resultRowAllocator, int resultSetNumber, int hashKeyItem, java.lang.String tableName, java.lang.String indexName, boolean isConstraint, int colRefItem, int lockMode, boolean tableLocked, int isolationLevel, double optimizerEstimatedRowCount, double optimizerEstimatedCost, org.apache.derby.iapi.services.loader.GeneratedMethod closeCleanup)

 

Method Summary
org.apache.derby.iapi.sql.execute.ExecRow	getNextRowCore()           Return the next row (if any) from the scan (if open).

 

Methods inherited from class org.apache.derby.impl.sql.execute.HashScanResultSet

addWarning, attachStatementContext, checkRowPosition, cleanUp, clearCurrentRow, clearOrderableCache, close, closeRowSource, dumpTimeStats, finish, finishAndRTS, getAbsoluteRow, getAutoGeneratedKeysResultset, getBeginExecutionTimestamp, getCompactRow, getCurrentRow, getCurrentTimeMillis, getCursorName, getElapsedMillis, getEndExecutionTimestamp, getEstimatedRowCount, getExecuteTime, getExecutionFactory, getFirstRow, getLanguageConnectionContext, getLastRow, getNextRow, getNextRowFromRowSource, getPointOfAttachment, getPreviousRow, getRelativeRow, getResultDescription, getRowLocation, getRowNumber, getScanIsolationLevel, getScanProperties, getSubqueryTrackingArray, getTimeSpent, getTransactionController, getValidColumns, getWarnings, isClosed, isForUpdate, markAsTopResultSet, modifiedRowCount, needsRowLocation, needsToClone, open, openCore, printQualifiers, printStartPosition, printStopPosition, reopenCore, requiresRelocking, resultSetNumber, returnsRows, rowLocation, setAfterLastRow, setBeforeFirstRow, setCheckConstraints, setCompactRow, setCompatRow, setCurrentRow, setHeapConglomerate, setNeedsRowLocation, setTargetResultSet, skipRow, skipScan

 

Methods inherited from class java.lang.Object

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

 

Methods inherited from interface org.apache.derby.iapi.sql.ResultSet

checkRowPosition, cleanUp, finish, getAbsoluteRow, getAutoGeneratedKeysResultset, getBeginExecutionTimestamp, getCursorName, getEndExecutionTimestamp, getExecuteTime, getFirstRow, getLastRow, getNextRow, getPreviousRow, getRelativeRow, getResultDescription, getRowNumber, getSubqueryTrackingArray, getWarnings, isClosed, modifiedRowCount, open, returnsRows, setAfterLastRow, setBeforeFirstRow

 

Field Detail

element

java.util.Enumeration element

Constructor Detail

DistinctScanResultSet

public DistinctScanResultSet(long conglomId,
                             org.apache.derby.iapi.store.access.StaticCompiledOpenConglomInfo scoci,
                             org.apache.derby.iapi.sql.Activation activation,
                             org.apache.derby.iapi.services.loader.GeneratedMethod resultRowAllocator,
                             int resultSetNumber,
                             int hashKeyItem,
                             java.lang.String tableName,
                             java.lang.String indexName,
                             boolean isConstraint,
                             int colRefItem,
                             int lockMode,
                             boolean tableLocked,
                             int isolationLevel,
                             double optimizerEstimatedRowCount,
                             double optimizerEstimatedCost,
                             org.apache.derby.iapi.services.loader.GeneratedMethod closeCleanup)
                      throws org.apache.derby.iapi.error.StandardException

Method Detail

getNextRowCore

public org.apache.derby.iapi.sql.execute.ExecRow getNextRowCore()
                                                         throws org.apache.derby.iapi.error.StandardException

Return the next row (if any) from the scan (if open).

Specified by:

getNextRowCore in interface org.apache.derby.iapi.sql.execute.NoPutResultSet

Overrides:

getNextRowCore in class HashScanResultSet

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> impl >> sql >> [ execute overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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