Java Doc for GenericActivationHolder.java in  » Database-DBMS » db-derby-10.2 » org » apache » derby » impl » sql » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.impl.sql   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.apache.derby.impl.sql.GenericActivationHolder GenericActivationHolder final class GenericActivationHolder implements Activation(Code) This class holds an Activation, and passes through most of the calls to the activation. The purpose of this class is to allow a PreparedStatement to be recompiled without the caller having to detect this and get a new activation. In addition to the Activation, this class holds a reference to the PreparedStatement that created it, along with a reference to the GeneratedClass that was associated with the PreparedStatement at the time this holder was created. These references are used to validate the Activation, to ensure that an activation is used only with the PreparedStatement that created it, and to detect when recompilation has happened. We detect recompilation by checking whether the GeneratedClass has changed. If it has, we try to let the caller continue to use this ActivationHolder. We create a new instance of the new GeneratedClass (that is, we create a new Activation), and we compare the number and type of parameters. If these are compatible, we copy the parameters from the old to the new Activation. If they are not compatible, we throw an exception telling the user that the Activation is out of date, and they need to get a new one. author:    Jeff Lichtman Field Summary  BaseActivation ac       GeneratedClass gc       DataTypeDescriptor[] paramTypes       ExecPreparedStatement ps      Constructor Summary   GenericActivationHolder(LanguageConnectionContext lcc, GeneratedClass gc, ExecPreparedStatement ps, boolean scrollable)      Method Summary public  void addWarning(SQLWarning w)      public  boolean checkIfThisActivationHasHoldCursor(String tableName)      Temporary tables can be declared with ON COMMIT DELETE ROWS. public  void checkStatementValidity()      public  void clearCurrentRow(int resultSetNumber)      public  void clearHeapConglomerateController()      public  void clearIndexScanInfo()      public  void clearParentResultSets()      public  void clearResultSet()      public  void clearWarnings()      public  void close()      public  ResultSet execute()      public  int[] getAutoGeneratedKeysColumnIndexes()      public  String[] getAutoGeneratedKeysColumnNames()      public  boolean getAutoGeneratedKeysResultsetMode()      public  ConstantAction getConstantAction()      public  String getCursorName()      public  TableDescriptor getDDLTableDescriptor()      public  DataValueFactory getDataValueFactory()      public  java.sql.ResultSet[][] getDynamicResults()      public  ExecutionFactory getExecutionFactory()      public  boolean getForCreateTable()      public  CursorResultSet getForUpdateIndexScan()      public  ConglomerateController getHeapConglomerateController()      public  long getIndexConglomerateNumber()      public  ScanController getIndexScanController()      public  LanguageConnectionContext getLanguageConnectionContext()      public  int getMaxDynamicResults()      public  int getMaxRows()      public  int getNumSubqueries()      Get the number of subqueries in the entire query. public  ParameterValueSet getParameterValueSet()      public  Vector getParentResultSet(String resultSetId)      public  Hashtable getParentResultSets()      public  ExecPreparedStatement getPreparedStatement()      public  ResultDescription getResultDescription()      public  ResultSet getResultSet()      public  boolean getResultSetHoldability()      public  RowLocation getRowLocationTemplate(int itemNumber)      public  java.sql.ResultSet getTargetVTI()      public  TransactionController getTransactionController()      public  SQLWarning getWarnings()      public  void informOfRowCount(NoPutResultSet resultSet, long rowCount)      public  boolean isClosed()      public  boolean isCursorActivation()      public  boolean isInUse()      public  boolean isSingleExecution()      Is the activation set up for a single execution. public  void markUnused()      Mark the activation as unused. public  void reset()      public  void setAutoGeneratedKeysResultsetInfo(int[] columnIndexes, String[] columnNames)      public  void setCurrentRow(ExecRow currentRow, int resultSetNumber)      public  void setCursorName(String cursorName)      public  void setDDLTableDescriptor(TableDescriptor td)      public  void setForCreateTable()      public  void setForUpdateIndexScan(CursorResultSet forUpdateResultSet)      public  void setHeapConglomerateController(ConglomerateController updateHeapCC)      public  void setIndexConglomerateNumber(long indexConglomerateNumber)      public  void setIndexScanController(ScanController indexSC)      public  void setMaxRows(int maxRows)      public  void setParameters(ParameterValueSet parameterValues, DataTypeDescriptor[] parameterTypes)      public  void setParentResultSet(TemporaryRowHolder rs, String resultSetId)      public  void setResultSetHoldability(boolean resultSetHoldability)      public  void setSingleExecution()      Set the activation for a single execution. public  void setTargetVTI(java.sql.ResultSet targetVTI)      Field Detail ac BaseActivation ac(Code) gc GeneratedClass gc(Code) paramTypes DataTypeDescriptor[] paramTypes(Code) ps ExecPreparedStatement ps(Code) Constructor Detail GenericActivationHolder GenericActivationHolder(LanguageConnectionContext lcc, GeneratedClass gc, ExecPreparedStatement ps, boolean scrollable) throws StandardException(Code) Constructor for an ActivationHolder Parameters:   gc - The GeneratedClass of the Activation Parameters:   ps - The PreparedStatement this ActivationHolder is associatedwith exception:   StandardException - Thrown on error Method Detail addWarning public void addWarning(SQLWarning w)(Code) See Also:   org.apache.derby.iapi.sql.Activation.addWarning checkIfThisActivationHasHoldCursor public boolean checkIfThisActivationHasHoldCursor(String tableName)(Code) Temporary tables can be declared with ON COMMIT DELETE ROWS. But if the table has a held curosr open at commit time, data should not be deleted from the table. This method, (gets called at commit time) checks if this activation held cursor and if so, does that cursor reference the passed temp table name. true if this activation has held cursor and if it references the passed temp table name checkStatementValidity public void checkStatementValidity() throws StandardException(Code) clearCurrentRow public void clearCurrentRow(int resultSetNumber)(Code) See Also:   Activation.clearCurrentRow clearHeapConglomerateController public void clearHeapConglomerateController()(Code) See Also:   Activation.clearHeapConglomerateController clearIndexScanInfo public void clearIndexScanInfo()(Code) See Also:   Activation.clearIndexScanInfo clearParentResultSets public void clearParentResultSets()(Code) clearResultSet public void clearResultSet()(Code) See Also:   Activation.clearResultSet clearWarnings public void clearWarnings()(Code) See Also:   org.apache.derby.iapi.sql.Activation.clearWarnings close public void close() throws StandardException(Code) See Also:   Activation.close exception:   StandardException - Thrown on error execute public ResultSet execute() throws StandardException(Code) See Also:   Activation.execute exception:   StandardException - Thrown on failure getAutoGeneratedKeysColumnIndexes public int[] getAutoGeneratedKeysColumnIndexes()(Code) See Also:   Activation.getAutoGeneratedKeysColumnIndexes See Also:    getAutoGeneratedKeysColumnNames public String[] getAutoGeneratedKeysColumnNames()(Code) See Also:   Activation.getAutoGeneratedKeysColumnNames See Also:    getAutoGeneratedKeysResultsetMode public boolean getAutoGeneratedKeysResultsetMode()(Code) See Also:   Activation.getAutoGeneratedKeysResultsetMode See Also:    getConstantAction public ConstantAction getConstantAction()(Code) getCursorName public String getCursorName()(Code) See Also:   Activation.getCursorName getDDLTableDescriptor public TableDescriptor getDDLTableDescriptor()(Code) See Also:   Activation.getDDLTableDescriptor getDataValueFactory public DataValueFactory getDataValueFactory()(Code) See Also:   Activation.getDataValueFactory getDynamicResults public java.sql.ResultSet[][] getDynamicResults()(Code) getExecutionFactory public ExecutionFactory getExecutionFactory()(Code) See Also:   Activation.getExecutionFactory See Also:    getForCreateTable public boolean getForCreateTable()(Code) See Also:   Activation.getForCreateTable getForUpdateIndexScan public CursorResultSet getForUpdateIndexScan()(Code) getHeapConglomerateController public ConglomerateController getHeapConglomerateController()(Code) See Also:   Activation.getHeapConglomerateController getIndexConglomerateNumber public long getIndexConglomerateNumber()(Code) See Also:   Activation.getIndexConglomerateNumber getIndexScanController public ScanController getIndexScanController()(Code) See Also:   Activation.getIndexScanController getLanguageConnectionContext public LanguageConnectionContext getLanguageConnectionContext()(Code) See Also:   org.apache.derby.iapi.sql.Activation.getLanguageConnectionContext See Also:    getMaxDynamicResults public int getMaxDynamicResults()(Code) getMaxRows public int getMaxRows()(Code) See Also:   Activation.getMaxRows getNumSubqueries public int getNumSubqueries()(Code) Get the number of subqueries in the entire query. int The number of subqueries in the entire query. getParameterValueSet public ParameterValueSet getParameterValueSet()(Code) See Also:   Activation.getParameterValueSet getParentResultSet public Vector getParentResultSet(String resultSetId)(Code) getParentResultSets public Hashtable getParentResultSets()(Code) getPreparedStatement public ExecPreparedStatement getPreparedStatement()(Code) See Also:   Activation.getPreparedStatement getResultDescription public ResultDescription getResultDescription()(Code) See Also:   Activation.getResultDescription getResultSet public ResultSet getResultSet()(Code) See Also:   Activation.getResultSet the current ResultSet of this activation. getResultSetHoldability public boolean getResultSetHoldability()(Code) See Also:   Activation.getResultSetHoldability getRowLocationTemplate public RowLocation getRowLocationTemplate(int itemNumber)(Code) See Also:   Activation.getRowLocationTemplate getTargetVTI public java.sql.ResultSet getTargetVTI()(Code) getTransactionController public TransactionController getTransactionController()(Code) getWarnings public SQLWarning getWarnings()(Code) See Also:   org.apache.derby.iapi.sql.Activation.getWarnings informOfRowCount public void informOfRowCount(NoPutResultSet resultSet, long rowCount) throws StandardException(Code) See Also:   Activation.informOfRowCount exception:   StandardException - Thrown on error isClosed public boolean isClosed()(Code) See Also:   Activation.isClosed isCursorActivation public boolean isCursorActivation()(Code) See Also:   Activation.isCursorActivation isInUse public boolean isInUse()(Code) Is the activation in use? true/false isSingleExecution public boolean isSingleExecution()(Code) Is the activation set up for a single execution. See Also:   Activation.isSingleExecution markUnused public void markUnused()(Code) Mark the activation as unused. reset public void reset() throws StandardException(Code) See Also:   Activation.reset exception:   StandardException - thrown on failure setAutoGeneratedKeysResultsetInfo public void setAutoGeneratedKeysResultsetInfo(int[] columnIndexes, String[] columnNames)(Code) See Also:   Activation.setAutoGeneratedKeysResultsetInfo See Also:    setCurrentRow public void setCurrentRow(ExecRow currentRow, int resultSetNumber)(Code) See Also:   Activation.setCurrentRow setCursorName public void setCursorName(String cursorName)(Code) See Also:   Activation.setCursorName setDDLTableDescriptor public void setDDLTableDescriptor(TableDescriptor td)(Code) See Also:   Activation.setDDLTableDescriptor setForCreateTable public void setForCreateTable()(Code) See Also:   Activation.setForCreateTable setForUpdateIndexScan public void setForUpdateIndexScan(CursorResultSet forUpdateResultSet)(Code) setHeapConglomerateController public void setHeapConglomerateController(ConglomerateController updateHeapCC)(Code) See Also:   Activation.setHeapConglomerateController setIndexConglomerateNumber public void setIndexConglomerateNumber(long indexConglomerateNumber)(Code) See Also:   Activation.setIndexConglomerateNumber setIndexScanController public void setIndexScanController(ScanController indexSC)(Code) See Also:   Activation.setIndexScanController setMaxRows public void setMaxRows(int maxRows)(Code) See Also:   Activation.setMaxRows setParameters public void setParameters(ParameterValueSet parameterValues, DataTypeDescriptor[] parameterTypes) throws StandardException(Code) See Also:   Activation.setParameters setParentResultSet public void setParentResultSet(TemporaryRowHolder rs, String resultSetId)(Code) setResultSetHoldability public void setResultSetHoldability(boolean resultSetHoldability)(Code) See Also:   Activation.setResultSetHoldability setSingleExecution public void setSingleExecution()(Code) Set the activation for a single execution. See Also:   Activation.setSingleExecution setTargetVTI public void setTargetVTI(java.sql.ResultSet targetVTI)(Code) 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)