Java Doc for NestedLoopJoinedRowIterator.java in  » Database-DBMS » axion » org » axiondb » engine » rowiterators » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » axion » org.axiondb.engine.rowiterators   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.axiondb.engine.rowiterators.BaseRowIterator       org.axiondb.engine.rowiterators.AbstractJoinedRowIterator          org.axiondb.engine.rowiterators.NestedLoopJoinedRowIterator NestedLoopJoinedRowIterator public class NestedLoopJoinedRowIterator extends AbstractJoinedRowIterator (Code) A Nested Loop Join is performed by doing a scan over the left subtree and for each row in it performing a full scan of the right subtree. This is the default join algorithm, which can be used for any join. However, it is usually less efficient than the other methods. Usually, either an existing index, or a dynamic index, used in an ANL join, will cost much less. Occasionally, when subtree cardinalities are very low (possibly because of index bracketing), nested loop will be the method with the least cost. version:    $Revision: 1.7 $ $Date: 2005/04/02 18:23:30 $ author:    Rodney Waldhoff author:    Ahimanikya Satapathy Constructor Summary public   NestedLoopJoinedRowIterator(RowIterator left, RowIterator right, int rightColumnCount, boolean rightOuter, boolean swapLeftAndRight)      public   NestedLoopJoinedRowIterator(RowIterator left, RowIterator right, int rightColumnCount)      Method Summary protected  RowIterator generateRightRowIterator()      public  void reset()      public  String toString()      Constructor Detail NestedLoopJoinedRowIterator public NestedLoopJoinedRowIterator(RowIterator left, RowIterator right, int rightColumnCount, boolean rightOuter, boolean swapLeftAndRight) throws AxionException(Code) NestedLoopJoinedRowIterator public NestedLoopJoinedRowIterator(RowIterator left, RowIterator right, int rightColumnCount) throws AxionException(Code) Method Detail generateRightRowIterator protected RowIterator generateRightRowIterator() throws AxionException(Code) reset public void reset() throws AxionException(Code) toString public String toString()(Code) Methods inherited from org.axiondb.engine.rowiterators.AbstractJoinedRowIterator public Row current() throws NoSuchElementException(Code)(Java Doc) public int currentIndex() throws NoSuchElementException(Code)(Java Doc) abstract protected RowIterator generateRightRowIterator() throws AxionException(Code)(Java Doc) protected Selectable getJoinCondition()(Code)(Java Doc) protected RowIterator getLeftRowIterator()(Code)(Java Doc) protected int getRightSideColumnCount()(Code)(Java Doc) protected RowDecorator getRowDecorator()(Code)(Java Doc) public boolean hasCurrent()(Code)(Java Doc) public boolean hasNext()(Code)(Java Doc) public boolean hasPrevious()(Code)(Java Doc) protected boolean isRightOuter()(Code)(Java Doc) protected boolean isSwapLeftAndRight()(Code)(Java Doc) public Row next() throws NoSuchElementException, AxionException(Code)(Java Doc) public int nextIndex()(Code)(Java Doc) public Row previous() throws NoSuchElementException, AxionException(Code)(Java Doc) public int previousIndex()(Code)(Java Doc) public void reset() throws AxionException(Code)(Java Doc) public void setJoinCondition(Selectable joinCondition, RowDecorator decorator)(Code)(Java Doc) protected void setLeftRowIterator(RowIterator left)(Code)(Java Doc) protected void setRightOuter(boolean b)(Code)(Java Doc) protected void setRightSideColumnCount(int rightColumnCount)(Code)(Java Doc) protected void setSwapLeftAndRight(boolean b)(Code)(Java Doc) public String toString()(Code)(Java Doc) Methods inherited from org.axiondb.engine.rowiterators.BaseRowIterator public void add(Row row) throws AxionException(Code)(Java Doc) abstract public Row current() throws NoSuchElementException(Code)(Java Doc) abstract public int currentIndex() throws NoSuchElementException(Code)(Java Doc) public Row first() throws AxionException(Code)(Java Doc) abstract public boolean hasCurrent()(Code)(Java Doc) abstract public boolean hasNext()(Code)(Java Doc) abstract public boolean hasPrevious()(Code)(Java Doc) public boolean isEmpty()(Code)(Java Doc) public Row last() throws AxionException(Code)(Java Doc) abstract public Row next() throws NoSuchElementException, AxionException(Code)(Java Doc) public int next(int count) throws AxionException(Code)(Java Doc) abstract public int nextIndex()(Code)(Java Doc) public Row peekNext() throws AxionException(Code)(Java Doc) public Row peekPrevious() throws AxionException(Code)(Java Doc) abstract public Row previous() throws NoSuchElementException, AxionException(Code)(Java Doc) public int previous(int count) throws AxionException(Code)(Java Doc) abstract public int previousIndex()(Code)(Java Doc) public void remove() throws AxionException(Code)(Java Doc) abstract public void reset() throws AxionException(Code)(Java Doc) public void set(Row row) throws AxionException(Code)(Java Doc) public int size() throws AxionException(Code)(Java Doc) Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)