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Class com.ibm.ivj.db.uibeans.Select

java.lang.Object
   |
   +----com.ibm.ivj.db.uibeans.Statement
           |
           +----com.ibm.ivj.db.uibeans.Select

public class Select
extends Statement
implements PropertyChangeListener, StatementAfterListener, StatementBeforeListener, DatabaseConnectionAfterListener, DatabaseConnectionBeforeListener, StatementResultAfterListener, StatementResultBeforeListener, StatementResultValueChangeListener, Serializable

Select allows you to access and change data in a relational database using JDBC.

Version:
1.0 06/30/98

Constructor Index

Select()
Constructs a new Select and initializes properties to the default values.

Method Index

aboutToAddNewRow(DataEvent)
Invoked when the underlying com.ibm.db.StatementResultBefore event aboutToAddNewRow is triggerd and fires the corresponding DataBefore event aboutToAddNewRow.
aboutToClose(DataEvent)
Invoked when the underlying com.ibm.db.StatementResultBefore event aboutToClose is triggerd and fires the corresponding DataBefore event aboutToClose.
aboutToCommit(DataEvent)
Invoked when the underlying com.ibm.db.DatabaseConnectionBefore event aboutToCommit is triggerd and fires the corresponding DataBefore event aboutToCommit.
aboutToConnect(DataEvent)
Invoked when the underlying com.ibm.db.DatabaseConnectionBefore event aboutToConnect is triggerd and fires the corresponding DataBefore event aboutToConnect.
aboutToDeleteRow(DataEvent)
Invoked when the underlying com.ibm.db.StatementResultBefore event aboutToDelete is triggerd and fires the corresponding DataBefore event aboutToDelete.
aboutToDisconnect(DataEvent)
Invoked when the underlying com.ibm.db.DatabaseConnectionBefore event aboutToDisconnect is triggerd and fires the corresponding DataBefore event aboutToDisconnect.
aboutToExecute(DataEvent)
Invoked when the underlying com.ibm.db.StatementBefore event aboutToExecute is triggerd and fires the corresponding DataBefore event aboutToExecute.
aboutToRollback(DataEvent)
Invoked when the underlying com.ibm.db.DatabaseConnectionBefore event aboutToRollback is triggerd and fires the corresponding DataBefore event aboutToRollback.
aboutToSetColumnValue(PropertyChangeEvent)
Invoked when the underlying com.ibm.db.StatementResultBefore event aboutToSetColumnValues is triggerd.
aboutToUpdateRow(DataEvent)
Invoked when the underlying com.ibm.db.StatementResultBefore event aboutToUpdateRow is triggerd and fires the corresponding DataBefore event aboutToUpdateRow.
addDataAfterListener(DataAfterListener)
Adds the DataAfterListener.
addDataBeforeListener(DataBeforeListener)
Adds the DataBeforeListener.
addedNewRow(DataEvent)
Invoked when the underlying com.ibm.db.StatementResultAfter event addedNewRow is triggerd and fires the corresponding DataAfter event addedNewRow.
addPropertyChangeListener(PropertyChangeListener)
Adds the PropertyChangeListener.
addTableModelListener(TableModelListener)
Adds the TableModelListener.
cacheRowsChanged(DataEvent)
Invoked when the underlying com.ibm.db.StatementResultAfter event cacheRowsChanged is triggerd and fires the corresponding DataAfter event cacheRowsChanged.
close()
Closes the result set.
closed(DataEvent)
Invoked when the underlying com.ibm.db.StatementResultAfter event closed is triggerd and fires the corresponding DataAfter event closed.
columnNames()
Returns the names of the columns of the result set.
columnValueSet(PropertyChangeEvent)
commit()
Commits changes to the database.
committed(DataEvent)
Invoked when the underlying com.ibm.db.DatabaseConnectionAfter event commmitted is triggerd and fires the corresponding DataAfter event committed.
connect()
Attempts to establish a connection to the database using the connection properties specified in the query property.
connected(DataEvent)
Invoked when the underlying com.ibm.db.DatabaseConnectionAfter event connected is triggerd and fires the corresponding DataAfter event connected.
deletedRow(DataEvent)
Invoked when the underlying com.ibm.db.StatementResultAfter event deletedRow is triggerd and fires the corresponding DataAfter event deletedRow.
deleteRow()
Deletes the current row from the result set and from the database.
disconnect()
If the connection represented by the connectionAlias is not currently being shared, disconnects from the database and releases JDBC resources associated with the connection.
disconnected(DataEvent)
Invoked when the underlying com.ibm.db.DatabaseConnectionAfter event disconnected is triggerd and fires the corresponding DataAfter event disconnected.
execute()
Executes the SQL SELECT statement and positions to the first row in the result set.
executed(DataEvent)
Invoked when the underlying com.ibm.db.StatementAfter event executed is triggerd and fires the corresponding DataAfter event executed.
firstRow()
Applies any changes in the current row to the database, and then makes the first row in the result set the current row.
getColumnClass(int)
Returns the java class that is used for the values of the column.
getColumnClass(String)
Returns the java class that is used for the values of the column.
getColumnCount()
Returns the number of columns in the result set.
getColumnIndex(String)
Returns the index of the column based on its name.
getColumnName(int)
Returns the name of the specified column.
getColumnValue(int)
Returns the value of the column at the specified index in the current row.
getColumnValue(String)
Returns the value of the column with the specified name in the current row.
getColumnValueToString(int)
Returns the value of the column at the specified index in the current row as a String.
getColumnValueToString(String)
Returns the value of the column with the specified name in the current row as a String.
getCurrentRow()
Returns the index of the current row in the result set.
getCurrentRowInCache()
Returns the index in the cache of the current row in the result set.
getDatabaseConnection()
Returns the underlying com.ibm.db.DatabaseConnection.
getInstanceBeanInfo()
Returns the BeanInfo that contains information about the instance properties of this Select.
getMaximumPacketsInCache()
Returns the maximum number of packets the cache can contain.
getMaximumRows()
Returns the maximum size of the result set.
getNumPacketsInCache()
Returns the number of packets currently in the cache.
getNumRows()
Returns the number of rows in the result set.
getNumRowsInCache()
Returns the number of rows currently in the cache.
getPacketSize()
Returns the number of rows that are in one packet in the cache.
getParameter(int)
Returns the value of the parameter at the specified index.
getParameter(String)
Returns the value of the parameter with the specified name.
getParameterToString(int)
Returns the value of the parameter at the specified index as a String.
getParameterToString(String)
Returns the value of the parameter with the specified name as a String.
getQuery()
Returns a new Query object that contains references to the connection alias and the SQL specification for this Select.
getResult()
Returns the underlying com.ibm.db.SelectResult.
getRowCount()
Returns the number of rows currently in the cache.
getSelectStatement()
Returns the underlying com.ibm.db.SelectStatement.
getStatementMetaData()
Returns the underlying com.ibm.db.StatementMetaData.
getValueAt(int, int)
Returns the value of the specified cell in the cache.
isCellEditable(int, int)
Returns true if isReadOnly returns false.
isEnd()
Returns true if the currentRow is the last row in the result set and no more rows can be fetched.
isExecuted()
Returns true if execute has been invoked.
isFillCacheOnExecute()
Returns true if the entire cache will be filled when execute is invoked.
isLockRows()
Returns true if a database lock is automatically held on a row while it is the current row.
isMaxRowsReached()
Returns true if the number of rows in the result set is equal to the maximum size of the result set.
isOpen()
Returns true if the result set is open in the database and can be accessed, otherwise returns false.
isReadOnly()
Returns true if updates are disallowed even when the database would permit them.
lastRow()
Applies any changes in the current row to the database, and then makes the last row in the result set the current row.
lockRow()
Locks the current row in the database.
newRow(boolean)
Applies any changes in the current row to the database, and then inserts a new row making it the current row.
nextPacket()
Fetches the next packet from the database into the result set.
nextRow()
Applies any changes in the current row to the database, and then makes the next row in the result set the current row.
previousRow()
Applies any changes in the current row to the database, and then makes the previous row in the result set the current row.
propertyChange(PropertyChangeEvent)
Method to handle events for the PropertyChangeListener interface.
refresh()
Refreshes the result set from the database by re-executing the SQL SELECT statement.
removeDataAfterListener(DataAfterListener)
Removes the DataAfterListener.
removeDataBeforeListener(DataBeforeListener)
Removes the DataBeforeListener.
removePropertyChangeListener(PropertyChangeListener)
Removes the PropertyChangeListener.
removeTableModelListener(TableModelListener)
Removes the TableModelListener.
restoreRow()
Restores a row's column values to those last known to be in the database.
rollback()
Rollback changes in the database.
rolledBack(DataEvent)
Invoked when the underlying com.ibm.db.DatabaseConnectionAfter event rolledBack is triggerd and fires the corresponding DataAfter event rolledBack.
setColumnValue(int, Object)
Sets (in the result set) the value of the column at the specified index in the current row.
setColumnValue(String, Object)
Sets (in the result set) the value of the column with the specified name in the current row.
setColumnValueFromString(int, String)
Sets (in the result set) the value of the column at the specified index in the current row.
setColumnValueFromString(String, String)
Sets (in the result set) the value of the column with the specified name in the current row.
setCurrentRow(int)
Applies any changes in the current row to the database, and then makes the specified row in the result set the current row.
setCurrentRowInCache(int)
Makes the specified row in the cache the currentRow in the result set.
setDatabaseConnection(DatabaseConnection)
Associates a DatabaseConnection with the Select.
setFillCacheOnExecute(boolean)
If true, the entire cache will be filled when execute is invoked.
setLockRows(boolean)
If true, a database lock is automatically held on a row while it is the current row.
setMaximumPacketsInCache(int)
Sets the maximum number of packets the cache can contain.
setMaximumRows(int)
Sets the maximum size of the result set.
setPacketSize(int)
Sets the number of rows that are in one packet in the cache.
setParameter(int, Object)
Sets the parameter at the specified index to the specified value.
setParameter(String, Object)
Sets the parameter with the specified name to the specified value.
setParameterFromString(int, String)
Sets the parameter at the specified index to the specified value.
setParameterFromString(String, String)
Sets the parameter with the specified name to the specified value.
setQuery(Query)
Sets the connection alias and the SQL specification for this Select to the values contained in the specified Query.
setReadOnly(boolean)
If true, updates are disallowed even when the database would permit them.
setStatementMetaData(StatementMetaData)
Associates a StatementMetaData with the Select.
setValueAt(Object, int, int)
Sets the specified cell in the cache to the specified value.
unlockRow()
Unlocks the current row.
updatedRow(DataEvent)
Invoked when the underlying com.ibm.db.StatementResultAfter event updatedRow is triggerd and fires the corresponding DataAfter event updatedRow.
updateRow()
Updates the database with the values of the current row in the result set.

Constructors

Select
 public Select()
Constructs a new Select and initializes properties to the default values.


Methods

aboutToAddNewRow
 public void aboutToAddNewRow(DataEvent event)
Invoked when the underlying com.ibm.db.StatementResultBefore event aboutToAddNewRow is triggerd and fires the corresponding DataBefore event aboutToAddNewRow.

Parameters:
event - DataEvent
aboutToClose
 public void aboutToClose(DataEvent event)
Invoked when the underlying com.ibm.db.StatementResultBefore event aboutToClose is triggerd and fires the corresponding DataBefore event aboutToClose.

Parameters:
event - DataEvent
aboutToCommit
 public void aboutToCommit(DataEvent event)
Invoked when the underlying com.ibm.db.DatabaseConnectionBefore event aboutToCommit is triggerd and fires the corresponding DataBefore event aboutToCommit.

Parameters:
event - DataEvent
aboutToConnect
 public void aboutToConnect(DataEvent event)
Invoked when the underlying com.ibm.db.DatabaseConnectionBefore event aboutToConnect is triggerd and fires the corresponding DataBefore event aboutToConnect.

Parameters:
event - DataEvent
aboutToDeleteRow
 public void aboutToDeleteRow(DataEvent event)
Invoked when the underlying com.ibm.db.StatementResultBefore event aboutToDelete is triggerd and fires the corresponding DataBefore event aboutToDelete.

Parameters:
event - DataEvent
aboutToDisconnect
 public void aboutToDisconnect(DataEvent event)
Invoked when the underlying com.ibm.db.DatabaseConnectionBefore event aboutToDisconnect is triggerd and fires the corresponding DataBefore event aboutToDisconnect.

Parameters:
event - DataEvent
aboutToExecute
 public void aboutToExecute(DataEvent event)
Invoked when the underlying com.ibm.db.StatementBefore event aboutToExecute is triggerd and fires the corresponding DataBefore event aboutToExecute.

Parameters:
event - DataEvent
aboutToRollback
 public void aboutToRollback(DataEvent event)
Invoked when the underlying com.ibm.db.DatabaseConnectionBefore event aboutToRollback is triggerd and fires the corresponding DataBefore event aboutToRollback.

Parameters:
event - DataEvent
aboutToSetColumnValue
 public void aboutToSetColumnValue(PropertyChangeEvent event)
Invoked when the underlying com.ibm.db.StatementResultBefore event aboutToSetColumnValues is triggerd. No action is taken.

Parameters:
event - DataEvent
aboutToUpdateRow
 public void aboutToUpdateRow(DataEvent event)
Invoked when the underlying com.ibm.db.StatementResultBefore event aboutToUpdateRow is triggerd and fires the corresponding DataBefore event aboutToUpdateRow.

Parameters:
event - DataEvent
addDataAfterListener
 public void addDataAfterListener(DataAfterListener newListener)
Adds the DataAfterListener. DataAfter events occur after actions have been completed.

Parameters:
newListener - DataAfterListener
See Also:
DataAfterListener, removeDataAfterListener
addDataBeforeListener
 public void addDataBeforeListener(DataBeforeListener newListener)
Adds the DataBeforeListener. DataBefore events occur after actions have been completed.

Parameters:
newListener - DataBeforeListener
See Also:
DataBeforeListener, removeDataBeforeListener
addedNewRow
 public void addedNewRow(DataEvent event)
Invoked when the underlying com.ibm.db.StatementResultAfter event addedNewRow is triggerd and fires the corresponding DataAfter event addedNewRow.

Parameters:
event - DataEvent
addPropertyChangeListener
 public synchronized void addPropertyChangeListener(PropertyChangeListener listener)
Adds the PropertyChangeListener.

Parameters:
listener - PropertyChangeListener
See Also:
removePropertyChangeListener
addTableModelListener
 public void addTableModelListener(TableModelListener newListener)
Adds the TableModelListener.

Parameters:
newListener - tableModleListener
See Also:
removeTableModelListener
cacheRowsChanged
 public void cacheRowsChanged(DataEvent event)
Invoked when the underlying com.ibm.db.StatementResultAfter event cacheRowsChanged is triggerd and fires the corresponding DataAfter event cacheRowsChanged.

Parameters:
event - DataEvent
close
 public void close() throws DataException
Closes the result set. JDBC resources associated with the result set are released. After the result set is closed, no more rows can be fetched into it and it cannot be used to update the database.

The events aboutToClose and closed are triggered by this method.

Throws: DataException
notExecuted - if statement has not been executed
Throws: DataException
notOpen - if the result set is not open
Throws: DataException
sqlException - if a SQLException occurred
closed
 public void closed(DataEvent event)
Invoked when the underlying com.ibm.db.StatementResultAfter event closed is triggerd and fires the corresponding DataAfter event closed.

Parameters:
event - DataEvent
columnNames
 public Enumeration columnNames() throws DataException
Returns the names of the columns of the result set.

Returns:
enumeration containing column names
columnValueSet
 public void columnValueSet(PropertyChangeEvent event)
commit
 public void commit() throws DataException
Commits changes to the database. All outstanding changes made to the database using the connection associated with the connection alias are committed to the database and any database locks currently held by the connection are released. This method should only be used when auto commit has been disabled.

The events aboutToCommit and committed are triggered by this method.

Throws: DataException
noActiveConnection - if no active connection exists
Throws: DataException
sqlException - if a SQL exception occurs
See Also:
rollback
committed
 public void committed(DataEvent event)
Invoked when the underlying com.ibm.db.DatabaseConnectionAfter event commmitted is triggerd and fires the corresponding DataAfter event committed.

Parameters:
event - DataEvent
connect
 public void connect() throws DataException
Attempts to establish a connection to the database using the connection properties specified in the query property.

If a connection already exists for the specified connectionAlias, no new connection is made and the existing connection is shared. If the value of connectionAlias is null, a new connection is always established.

The events aboutToConnect and connected are triggered by this method.

Throws: DataException
noGui - if no GUI available and logon prompt requested
Throws: DataException
badUidPwd - if incorrect Userid or password specified
Throws: DataException
sqlException - if SQLException occurred
See Also:
disconnect
connected
 public void connected(DataEvent event)
Invoked when the underlying com.ibm.db.DatabaseConnectionAfter event connected is triggerd and fires the corresponding DataAfter event connected.

Parameters:
event - DataEvent
deletedRow
 public void deletedRow(DataEvent event)
Invoked when the underlying com.ibm.db.StatementResultAfter event deletedRow is triggerd and fires the corresponding DataAfter event deletedRow.

Parameters:
event - DataEvent
deleteRow
 public void deleteRow() throws DataException
Deletes the current row from the result set and from the database. If the last row in the result set is deleted, the previous row becomes the current row. Otherwise, the next row becomes the current row and the index returned by the getCurrentRow method does not change.

Before the database is updated, if the row is not already locked, the lockRow method is implicitly invoked to insure that no other user has updated or deleted the row in the database. A table must have been defined via addTable in order for this lock to be otbained. The database lock is released after the delete. To insure that your delete affects the intended row in the database, make sure that the SQL statement used to produce the result set includes columns that uniquely identify a row. For a fuller discussion of these points, see the lockRow method.

The events aboutToDeleteRow and deletedRow are triggered by this method. The event cacheRowsChanged may also be triggered.

Throws: DataException
notExecuted - if the statement has not been executed
Throws: DataException
notOpen - if the result set is not open
Throws: DataException
readOnly - if the result set is read only
Throws: DataException
noResults - if the result set is empty
Throws: DataException
rowChanged - if the current row cannot be deleted from the database because it has been modified by another user since it was fetched
Throws: DataException
rowNotFound - if the lockRows property of the associated SelectStatement is true and the new current row cannot be locked
Throws: DataException
sqlException - if a SQLException occurred
See Also:
lockRow
disconnect
 public void disconnect() throws DataException
If the connection represented by the connectionAlias is not currently being shared, disconnects from the database and releases JDBC resources associated with the connection. If the connection is being shared, the use count is decremeted by 1.

The events aboutToDisconnect and disconnected are triggered by this method.

Throws: DataException
noActiveConnection - if no active Connection
Throws: DataException
sqlException - if SQLException occurred
See Also:
connect
disconnected
 public void disconnected(DataEvent event)
Invoked when the underlying com.ibm.db.DatabaseConnectionAfter event disconnected is triggerd and fires the corresponding DataAfter event disconnected.

Parameters:
event - DataEvent
execute
 public void execute() throws DataException
Executes the SQL SELECT statement and positions to the first row in the result set. If needed, a connection is made to the database prior to executing the SQL statement.

The events aboutToExecute and executed are triggered by this method.

The event cacheRowsChanged is triggered by this method.

Throws: DataException
noGui - if no GUI available and logon prompt requested
Throws: DataException
badUidPwd - if incorrect Userid or password specified
Throws: DataException
noSQL - if SQL statement is null
Throws: DataException
notSelect - if SQL statement is not a SELECT statement
Throws: DataException
sqlException - if a SQLException occurred
executed
 public void executed(DataEvent event)
Invoked when the underlying com.ibm.db.StatementAfter event executed is triggerd and fires the corresponding DataAfter event executed.

Parameters:
event - DataEvent
firstRow
 public void firstRow() throws DataException
Applies any changes in the current row to the database, and then makes the first row in the result set the current row.

If the first row in the result set has been displaced from the cache, the first row still in the cache becomes the current row and an exception is thrown to notify the user that the request could not be satisfied.

If the current row should be locked ( isLockRows returns true), the new current row is locked in the database.

The event cacheRowsChanged may be triggered by this method.

Throws: DataException
notExecuted - if the statement has not been executed
Throws: DataException
noResults - if the result set is empty
Throws: DataException
rowChanged - if the current row cannot be updated in the database because it has been modified by another user since it was fetched
Throws: DataException
rowNotFound - if the lockRows property of the associated SelectStatement is true and the new current row cannot be locked
Throws: DataException
beforeCacheStart - if the requested row is before the start of the cache
Throws: DataException
sqlException - if a SQLException occurred
See Also:
setCurrentRow
getColumnClass
 public Class getColumnClass(int columnIndex)
Returns the java class that is used for the values of the column. If the columns have been defined by addColumn, this method returns the java class used in the definition. If the columns have not been defined by addColumn, the java class is not available until after the SQL statement has been executed.

Parameters:
columnNumber - the index of the column
Returns:
the java class for the column
Throws: IndexOutOfBoundsException
if the column index is not defined
getColumnClass
 public Class getColumnClass(String columnName)
Returns the java class that is used for the values of the column. If the columns have been defined by addColumn, this method returns the java class used in the definition. If the columns have not been defined by addColumn, the java class is not available until after the SQL statement has been executed.

Parameters:
columnName - the name of the column
Returns:
the java class for the column
Throws: IndexOutOfBoundsException
if the column name is not defined
getColumnCount
 public int getColumnCount()
Returns the number of columns in the result set. If the columns have been defined by addColumn, this method returns the number of columns that have currently been defined. If the columns have not been defined by addColumn, the number of columns is not available until after the SQL statement has been executed.

Returns:
the number of columns
getColumnIndex
 public int getColumnIndex(String columnName)
Returns the index of the column based on its name. If the columns have been defined by addColumn, this method returns an index representing the order that the columns were defined. If the columns have not been defined by addColumn, the column index is not available until after the SQL statement has been executed. The first defined column has an index of 0.

Parameters:
columnName - the name of the column
Returns:
the column index
getColumnName
 public String getColumnName(int columnIndex)
Returns the name of the specified column. If the columns have not been defined by addColumn, the name is not available until after the SQL statement has been executed.

Parameters:
columnNumber - the index of the column
Returns:
the column name
Throws: IndexOutOfBoundsException
if the column index is not defined
getColumnValue
 public Object getColumnValue(int columnNumber) throws DataException
Returns the value of the column at the specified index in the current row. The index of the first column is 0.

If a DataException is raised attempting to get the column value because the statement has not been executed or the resut set is empty, the error is logged and a null value is returned.

Parameters:
columnNumber - index of the column
Returns:
value of the column
Throws: IndexOutOfBoundsException
noSuchColumn - if the column index is not defined
See Also:
setColumnValue
getColumnValue
 public Object getColumnValue(String columnName) throws DataException
Returns the value of the column with the specified name in the current row.

If a DataException is raised attempting to get the column value because the statement has not been executed or the resut set is empty, the error is logged and a null value is returned.

Parameters:
columnName - name of the column
Returns:
value of the column
Throws: IndexOutOfBoundsException
noSuchColumn - if the column name is not defined
See Also:
setColumnValue
getColumnValueToString
 public String getColumnValueToString(int columnNumber) throws DataException
Returns the value of the column at the specified index in the current row as a String. The value of the column is converted to a String before it is returned. If the column value is null, a null is returned. The index of the first column is 0.

If a DataException is raised attempting to get the column value because the statement has not been executed or the resut set is empty, the error is logged and a null value is returned.

Parameters:
columnNumber - index of the column
Returns:
value of the column as a String.
Throws: IndexOutOfBoundsException
noSuchColumn - if the column index is not defined
See Also:
setColumnValueFromString
getColumnValueToString
 public String getColumnValueToString(String columnName) throws DataException
Returns the value of the column with the specified name in the current row as a String. The value of the column is converted to a String before it is returned. If the column value is null, a null is returned.

If a DataException is raised attempting to get the column value because the statement has not been executed or the resut set is empty, the error is logged and a null value is returned.

Parameters:
columnName - name of the column
Returns:
value of the column as a String.
Throws: IndexOutOfBoundsException
noSuchColumn - if the column name is not defined
See Also:
setColumnValueFromString
getCurrentRow
 public int getCurrentRow()
Returns the index of the current row in the result set. The index of the first row is 0.

Many methods on Select operate on the current row.

Returns:
index of the current row
See Also:
setCurrentRow
getCurrentRowInCache
 public int getCurrentRowInCache()
Returns the index in the cache of the current row in the result set. The index of the first row in the cache is 0.

The value of currentRowInCache and currentRow will be the same unless you are using the large result set support and a packet has been displaced from the cache. For example, if a packet of 10 rows has been displaced from the cache and the currentRow is 10, the currentRowInCache would be 0.

Returns:
index of the current row
getDatabaseConnection
 public DatabaseConnection getDatabaseConnection()
Returns the underlying com.ibm.db.DatabaseConnection.

Returns:
the associated DatabaseConnection
Overrides:
getDatabaseConnection in class Statement
See Also:
setDatabaseConnection
getInstanceBeanInfo
 public BeanInfo getInstanceBeanInfo()
Returns the BeanInfo that contains information about the instance properties of this Select. This method is called by the VAJ IDE to display the columns from the associated SQL statement on the connection dialog.

Returns:
beanInfo of instance properties
getMaximumPacketsInCache
 public int getMaximumPacketsInCache()
Returns the maximum number of packets the cache can contain.

Returns:
the maximum number of packets in the cache
See Also:
setMaximumPacketsInCache
getMaximumRows
 public int getMaximumRows()
Returns the maximum size of the result set. If there is no limit to the size of the result set, the value will be 0.

Returns:
the maximum size of the result set.
See Also:
setMaximumRows
getNumPacketsInCache
 public int getNumPacketsInCache()
Returns the number of packets currently in the cache.

Returns:
the number of packets in the cache
getNumRows
 public int getNumRows()
Returns the number of rows in the result set. This number changes as rows are fetched from the database, deleted, or added via the newRow method.

Returns:
number of rows in the result set
getNumRowsInCache
 public int getNumRowsInCache()
Returns the number of rows currently in the cache.

Returns:
the number of rows in cache
getPacketSize
 public int getPacketSize()
Returns the number of rows that are in one packet in the cache.

Returns:
the size of the packet in the cache.
See Also:
setPacketSize
getParameter
 public Object getParameter(int parameterNumber) throws DataException
Returns the value of the parameter at the specified index. The index of the first parameter is 1.

Parameters:
parameterNumber - index of the parameter
Returns:
the parameter value
Throws: IndexOutOfBoundsException
if the parameter index is not defined
See Also:
setParameter
getParameter
 public Object getParameter(String parameterName) throws DataException
Returns the value of the parameter with the specified name.

Parameters:
parameterName - name of the parameter
Returns:
the parameter value
Throws: IndexOutOfBoundsException
if the parameter name is not defined
See Also:
setParameter
getParameterToString
 public String getParameterToString(int parameterNumber)
Returns the value of the parameter at the specified index as a String. The value of the parameter is converted to a String before the value is returned. If the parameter value is null, a null is returned. The index of the first parameter is 1.

Parameters:
parameterNumber - index of the parameter
Returns:
value of the parameter as a String
Throws: IndexOutOfBoundsException
if the parameter index is not defined
See Also:
setParameterFromString
getParameterToString
 public String getParameterToString(String parameterName)
Returns the value of the parameter with the specified name as a String. The value of the parameter is converted to a String before the value is returned. If the parameter value is null, a null is returned.

Parameters:
parameterName - name of the parameter
Returns:
value of the parameter as a String
Throws: IndexOutOfBoundsException
if the parameter name is not defined
See Also:
setParameterFromString
getQuery
 public Query getQuery()
Returns a new Query object that contains references to the connection alias and the SQL specification for this Select.

Returns:
a new Query
See Also:
setQuery
getResult
 public SelectResult getResult()
Returns the underlying com.ibm.db.SelectResult.

Returns:
the associated SelectResult
getRowCount
 public int getRowCount()
Returns the number of rows currently in the cache.

Returns:
the number of rows in the cache
getSelectStatement
 public SelectStatement getSelectStatement()
Returns the underlying com.ibm.db.SelectStatement.

Returns:
the associated SelectStatement.
getStatementMetaData
 public StatementMetaData getStatementMetaData()
Returns the underlying com.ibm.db.StatementMetaData.

Returns:
the associated StatementMetaData
See Also:
setStatementMetaData
getValueAt
 public Object getValueAt(int rowIndex,
                          int columnIndex)
Returns the value of the specified cell in the cache. The index of both the first row and the first column is 0.

Returns:
the value of the specified cell
isCellEditable
 public boolean isCellEditable(int rowIndex,
                               int columnIndex)
Returns true if isReadOnly returns false. If the SQL statement returns a result set that cannot be updated, you should explicitly set the ReadOnly property to true, so that the correct value is returned for this method.

Returns:
true if isReadOnly returns false.
See Also:
setReadOnly
isEnd
 public boolean isEnd()
Returns true if the currentRow is the last row in the result set and no more rows can be fetched. No more rows can be fetched if any of the following conditions is true: all rows have been fetched from the database, the maxRows limit has been reached, or the result set has been closed.

Returns:
true if the currentRow is the last row in the result set and no more rows can be fetched
See Also:
isOpen, isMaxRowsReached
isExecuted
 public boolean isExecuted()
Returns true if execute has been invoked.

Returns:
true if execute has been invoked. otherwise false.
isFillCacheOnExecute
 public boolean isFillCacheOnExecute()
Returns true if the entire cache will be filled when execute is invoked.

Returns:
true if the entire cache will be filled when execute is invoked, else false.
See Also:
setFillCacheOnExecute
isLockRows
 public boolean isLockRows()
Returns true if a database lock is automatically held on a row while it is the current row. Returns false if a database lock is only held on a row while it is being updated in the database.

See lockRow for a fuller discussion of what it means for a row to be locked.

Returns:
The lockRows property value.
See Also:
setLockRows, lockRow
isMaxRowsReached
 public boolean isMaxRowsReached()
Returns true if the number of rows in the result set is equal to the maximum size of the result set.

Returns:
true if the number of rows in the result set is equal to the maximum size of the result set, otherwise false.
See Also:
setMaximumRows
isOpen
 public boolean isOpen()
Returns true if the result set is open in the database and can be accessed, otherwise returns false. If the result set is not open, rows cannot be fetched from the the database and updates cannot be performed. When isOpen returns false, it may be because the SQL statement has not been executed, the close method has been invoked, or this Select has been serialized and then de-serialized.

Returns:
true if the result set is open in the database, otherwise false.
isReadOnly
 public boolean isReadOnly()
Returns true if updates are disallowed even when the database would permit them. Returns false if updates are allowed as long as the database will permit them.

Returns:
true if updates are disallowed, otherwise false.
See Also:
setReadOnly
lastRow
 public void lastRow() throws DataException
Applies any changes in the current row to the database, and then makes the last row in the result set the current row. If more rows can be fetched from the database they are fetched before making the last row current. For a discussion of when more rows can be fetched, see the isEnd method.

If the current row should be locked ( isLockRows returns true), the new current row is locked in the database.

The event cacheRowsChanged is triggered by this method.

Throws: DataException
notExecuted - if statement has not been executed
Throws: DataException
noResults - if the result set is empty
Throws: DataException
rowChanged - if the current row cannot be updated in the database because it has been modified by another user since it was fetched
Throws: DataException
rowNotFound - if the lockRows property of the associated SelectStatement is true and the new current row cannot be locked
Throws: DataException
sqlException - if a SQLException occurred
See Also:
setCurrentRow
lockRow
 public void lockRow() throws DataException
Locks the current row in the database. No updates can be made to this row by another user until the lock is released. The lock is automatically released when you move to another row. You can release the lock without moving to another row by invoking the unlockRow method.

The row is locked by opening a database cursor using a SELECT statement whose WHERE clause should identify the one row whose column values are those last known to this result set. If the row has been updated in the database by another user, it will not be identified, and you cannot obtain the lock. An exception is thrown in this case. A table must be defined via addTable in order for this SELECT statement to be generated.

To insure that no more than one row is identified, make sure the SELECT statement associated with this result set includes columns that uniquely identify a row. If more than one row is identified, more than one row is locked. Furthermore, a subsequent updateRow or deleteRow will affect one of the locked rows, but it is unpredictable whether this is the one you intended. This situation cannot be detected, and no exception is thrown.

Throws: DataException
notExecuted - if statement has not been executed
Throws: DataException
noResults - if the result set is empty
Throws: DataException
readOnly - if the result set is read only
Throws: DataException
notOpen - if the result set is not open
Throws: DataException
rowNotFound - if the current row cannot be locked in the database because it has been modified by another user since it was fetched
Throws: DataException
rowNotInDatabase - if the current row cannot be locked in the database because it has not yet been written to the database
Throws: DataException
sqlException - if a SQLException occurred
See Also:
unlockRow
newRow
 public void newRow(boolean beforeCurrent) throws DataException
Applies any changes in the current row to the database, and then inserts a new row making it the current row. Use the setColumnValue method to set values for its columns. The new row is not inserted into the database until you move to another row or invoke the updateRow method.

The events aboutToAddNewRow, addedNewRow, and cacheRowsChanged are triggered by this method.

Parameters:
beforeCurrent - true, insert the new row before the current row; false insert the new row after the current row.
Throws: DataException
notExecuted - if statement has not been executed
Throws: DataException
readOnly - if the result set is read only
Throws: DataException
notOpen - if the result set is not open
Throws: DataException
maxSize - if the maximum number of rows in the result set has been reached
Throws: DataException
rowChanged - if the current row cannot be updated in the database because it has been modified by another user since it was fetched
nextPacket
 public void nextPacket() throws DataException
Fetches the next packet from the database into the result set. If this causes the current row to be displaced from the cache any changes in the current row are first applied to the database, and then the first row in the cache becomes the current row.

The event cacheRowsChanged is triggered by this method.

Throws: DataException
notExecuted - if statement has not been executed
Throws: DataException
noResults - if the result set is empty
Throws: DataException
notOpen - if the result set is not open
Throws: DataException
rowChanged - if the current row cannot be updated in the database because it has been modified by another user since it was fetched
Throws: DataException
rowNotFound - if the lockRows property of the associated SelectStatement is true and the new current row cannot be locked
Throws: DataException
sqlException - if a SQLException occurred
nextRow
 public void nextRow() throws DataException
Applies any changes in the current row to the database, and then makes the next row in the result set the current row.

If the next row has not already been fetched from the database, it is fetched, along with any other rows in the next packet. If no more rows can be fetched, the last row remains the current row, and no exception is thrown. Thus, if you are at the end of the result set, repeatedly invoking this method has no effect. For a discussion of when no more rows can be fetched, see the isEnd method.

If the current row should be locked ( isLockRows returns true), the new current row is locked in the database.

The event cacheRowsChanged is triggered by this method.

Throws: DataException
notExecuted - if statement has not been executed
Throws: DataException
noResults - if the result set is empty
Throws: DataException
rowChanged - if the current row cannot be updated in the database because it has been modified by another user since it was fetched
Throws: DataException
rowNotFound - if the lockRows property of the associated SelectStatement is true and the new current row cannot be locked
Throws: DataException
sqlException - if a SQLException occurred
See Also:
setCurrentRow
previousRow
 public void previousRow() throws DataException
Applies any changes in the current row to the database, and then makes the previous row in the result set the current row.

If you are already on the first row, it remains the current row, and no exception is thrown. Thus, if you are at the beginning of the result set, repeatedly invoking this method has no effect.

If the previous row has been displaced from the cache, the first row in the cache remains the current row and an exception is thrown to notify the user that the request could not be satisfied.

If the current row should be locked ( isLockRows returns true), the new current row is locked in the database.

Throws: DataException
notExecuted - if statement has not been executed
Throws: DataException
noResults - if the result set is empty
Throws: DataException
rowChanged - if the current row cannot be updated in the database because it has been modified by another user since it was fetched
Throws: DataException
rowNotFound - if the lockRows property of the associated SelectStatement is true and the new current row cannot be locked
Throws: DataException
beforeCacheStart - if the requested row is before the start of the cache
Throws: DataException
sqlException - if a SQLException occurred
See Also:
setCurrentRow
propertyChange
 public void propertyChange(PropertyChangeEvent arg1)
Method to handle events for the PropertyChangeListener interface.

Parameters:
arg1 - java.beans.PropertyChangeEvent
refresh
 public void refresh() throws DataException
Refreshes the result set from the database by re-executing the SQL SELECT statement. The statement must currently be open.

The event cacheRowsChanged is triggered by this method.

Throws: DataException
noActiveConnection - if no active connection exists
Throws: DataException
notOpen - if the result set is not open
Throws: DataException
sqlException - if a SQLException occurred
See Also:
execute
removeDataAfterListener
 public void removeDataAfterListener(DataAfterListener newListener)
Removes the DataAfterListener. DataAfter events occur after actions have been completed.

Parameters:
newListener - DataAfterListener
See Also:
DataAfterListener, addDataAfterListener
removeDataBeforeListener
 public void removeDataBeforeListener(DataBeforeListener newListener)
Removes the DataBeforeListener. DataBefore events occur after actions have been completed.

Parameters:
newListener - DataBeforeListener
See Also:
DataBeforeListener, addDataBeforeListener
removePropertyChangeListener
 public synchronized void removePropertyChangeListener(PropertyChangeListener listener)
Removes the PropertyChangeListener.

Parameters:
listener - PropertyChangeListener
See Also:
addPropertyChangeListener
removeTableModelListener
 public void removeTableModelListener(TableModelListener newListener)
Removes the TableModelListener.

Parameters:
newListener - tableModleListener
See Also:
addTableModelListener
restoreRow
 public void restoreRow() throws DataException
Restores a row's column values to those last known to be in the database. Use this method when an attempt to lock a row, write a row in the database, or delete a row from the database failed. This can occur implicitly when you try to move to another row. When one of these failures has occurred, you cannot move to another row until you either correct the problem or use this method.

If the current row was added via the newRow method, its column values are reset to nulls. Otherwise, its column values are reset to the the values originally fetched from the database or the values to which it was last successfully updated.

If you believe the failure that occurred is correctible by changing one or more of column values, as for example if the failure was due to a duplicate key value in the database, you can just change the values and try the operation again instead of using this method.

Throws: DataException
notExecuted - if statement has not been executed
Throws: DataException
noResults - if the result set is empty
Throws: DataException
readOnly - if the result set is read only
rollback
 public void rollback() throws DataException
Rollback changes in the database. All changes made since the previous commit/rollback are rolled back and any database locks currently held by the connection are released. This method should only be used when auto commit has been disabled.

The events aboutToRollback and rolledBack are triggered by this method.

Throws: DataException
noActiveConnection - if no active connection exists
Throws: DataException
sqlException - if a SQL exception occurs
See Also:
commit
rolledBack
 public void rolledBack(DataEvent event)
Invoked when the underlying com.ibm.db.DatabaseConnectionAfter event rolledBack is triggerd and fires the corresponding DataAfter event rolledBack.

Parameters:
event - DataEvent
setColumnValue
 public void setColumnValue(int columnNumber,
                            Object aValue) throws DataException
Sets (in the result set) the value of the column at the specified index in the current row. The index of the first column is 0.

The column value is not updated in the database until you move to another row or invoke updateRow.

Parameters:
columnNumber - index of the column
aValue - value for the column
Throws: DataException
notExecuted - if statement has not been executed
Throws: DataException
notOpen - if the result set is not open
Throws: DataException
readOnly - if the result set is read only
Throws: DataException
noResults - if the result set is empty
Throws: IndexOutOfBoundsException
noSuchColumn - if the column index is not defined
Throws: DataException
wrongObjectType - if the value does match the object type of the column
See Also:
getColumnValue
setColumnValue
 public void setColumnValue(String columnName,
                            Object aValue) throws DataException
Sets (in the result set) the value of the column with the specified name in the current row.

The column value is not updated in the database until you move to another row or invoke updateRow.

Parameters:
columnName - name of the column
aValue - value for the column
Throws: DataException
notExecuted - if statement has not been executed
Throws: DataException
notOpen - if the result set is not open
Throws: DataException
readOnly - if the result set is read only
Throws: DataException
noResults - if the result set is empty
Throws: IndexOutOfBoundsException
noSuchColumn - if the column name is not defined
Throws: DataException
wrongObjectType - if the value does match the object type of the column
See Also:
getColumnValue
setColumnValueFromString
 public void setColumnValueFromString(int columnNumber,
                                      String stringValue) throws DataException
Sets (in the result set) the value of the column at the specified index in the current row. The index of the first column is 0.

The stringValue parameter is converted to the datatype associated with the column before the value is set.

The column value is not updated in the database until you move to another row or invoke updateRow.

Parameters:
columnNumber - index of the column
stringValue - value for the column
Throws: DataException
notExecuted - if associated statement has not been executed
Throws: DataException
notOpen - if the result set is not open
Throws: DataException
readOnly - if the result set is read only
Throws: DataException
noResults - if the result set is empty
Throws: IndexOutOfBoundsException
noSuchColumn - if the column index is not defined
Throws: DataException
cannotConvert - if cannot convert to object type of column of the column
See Also:
getColumnValueToString
setColumnValueFromString
 public void setColumnValueFromString(String columnName,
                                      String stringValue) throws DataException
Sets (in the result set) the value of the column with the specified name in the current row.

The stringValue parameter is converted to the datatype associated with the column before the value is set.

The column value is not updated in the database until you move to another row or invoke updateRow.

Parameters:
columnName - name of the column
stringValue - value for the column
Throws: DataException
notExecuted - if statement has not been executed
Throws: DataException
notOpen - if the result set is not open
Throws: DataException
readOnly - if the result set is read only
Throws: DataException
noResults - if the result set is empty
Throws: IndexOutOfBoundsException
noSuchColumn - if the column name is not defined
Throws: DataException
cannotConvert - if cannot convert to object type of column
See Also:
getColumnValueToString
setCurrentRow
 public void setCurrentRow(int currentRow) throws DataException
Applies any changes in the current row to the database, and then makes the specified row in the result set the current row.

If the specified row has not yet been fetched, packets are fetched until the specified row is in the cache or no more rows can be fetched. If no more rows can be fetched, and the specified row was not reached, the last row becomes the current row and an exception is thrown to notify the user that the request could not be satisfied. For a discussion of when no more rows can be fetched, see the isEnd method.

If the specified row has been displaced from the cache, the first row in the cache becomes the current row and an exception is thrown to notify the user that the request could not be satisfied.

If the current row should be locked ( isLockRows returns true), the new current row is locked in the database.

The event cacheRowsChanged may be triggered by this method.

Parameters:
rowNumber - index in the result set of the row
Throws: DataException
notExecuted - if statement has not been executed
Throws: DataException
noResults - if the result set is empty
Throws: DataException
rowChanged - if the current row cannot be updated in the database because it has been modified by another user since it was fetched
Throws: DataException
rowNotFound - if the lockRows property is true and the new current row cannot be locked
Throws: DataException
beforeCacheStart - if the requested row is before the start of the cache
Throws: DataException
indexTooLarge - if the requested row is after the end of the result set
Throws: DataException
sqlException - if a SQLException occurred
See Also:
getCurrentRow
setCurrentRowInCache
 public void setCurrentRowInCache(int row) throws DataException
Makes the specified row in the cache the currentRow in the result set. The value currentRowInCache and currentRow will be the same unless you are using the large result set support and a packet has been displaced from the cache.

Parameters:
row - the index of the row in the cache
Throws: DataException
notExecuted - if statement has not been executed
Throws: DataException
noResults - if the result set is empty
Throws: DataException
rowChanged - if the current row cannot be updated in the database because it has been modified by another user since it was fetched
Throws: DataException
rowNotFound - if the lockRows property true and the new current row cannot be locked
Throws: DataException
beforeCacheStart - if the requested row is before the start of the cache
Throws: DataException
indexTooLarge - if the requested row is after the end of the result set
Throws: DataException
sqlException - if a SQLException occurred
See Also:
setCurrentRow
setDatabaseConnection
 public void setDatabaseConnection(DatabaseConnection connection)
Associates a DatabaseConnection with the Select.

Parameters:
connection - the associated DatabaseConnection
Overrides:
setDatabaseConnection in class Statement
See Also:
getDatabaseConnection
setFillCacheOnExecute
 public void setFillCacheOnExecute(boolean fillCache)
If true, the entire cache will be filled when execute is invoked. Otherwise, rows will be fetched into the cache as needed to satisfy a request to set the current row position.

The default value is true.

Parameters:
fillCacheOnExecute - true, fill entire cache on execute ; false fill cache only as needed
See Also:
getFillCacheOnExecute
setLockRows
 public void setLockRows(boolean lockRows)
If true, a database lock is automatically held on a row while it is the current row. If false, a database lock is only held on a row while it is being updated in the database.

The default value is false.

See lockRow for a fuller discussion of what it means for a row to be locked.

Parameters:
lockRows - true, hold database lock while a row is the current row; false hold database lock only while a row is updated.
See Also:
getLockRows, lockRow
setMaximumPacketsInCache
 public void setMaximumPacketsInCache(int maximumPacketsInCache)
Sets the maximum number of packets the cache can contain. Set the value to 0 if there is no limit on the number of packets in the cache.

The default value is 0.

Parameters:
maximumPacketsInCache - the maximum number of packets in cache
See Also:
getMaximumPacketsInCache
setMaximumRows
 public void setMaximumRows(int maximumRows)
Sets the maximum size of the result set. Set the value to 0 if there is no limit on the number of rows that can be contained in the result set.

The default value is 0.

Parameters:
maximumRows - the maximum number of rows in the result set
See Also:
getMaximumRows
setPacketSize
 public void setPacketSize(int packetSize)
Sets the number of rows that are in one packet in the cache. Set the value to 0 if there is no limit on the number of rows in a packet.

The default value is 0.

Parameters:
packetSize - the size of the packet in the cache
See Also:
getPacketSize
setParameter
 public void setParameter(int parameterNumber,
                          Object aValue) throws DataException
Sets the parameter at the specified index to the specified value. The index of the first parameter is 1.

Parameters:
parameterNumber - index of the parameter
aValue - parameter value
Throws: IndexOutOfBoundsException
if the parameter index is not defined
Throws: DataException
if the value does match the object type of the parameter
See Also:
getParameter
setParameter
 public void setParameter(String parameterName,
                          Object aValue) throws DataException
Sets the parameter with the specified name to the specified value.

Parameters:
parameterName - name of the parameter
aValue - parameter value
Throws: IndexOutOfBoundsException
if the parameter name is not defined
Throws: DataException
if the value does match the object type of the parameter
See Also:
getParameter
setParameterFromString
 public void setParameterFromString(int parameterNumber,
                                    String stringValue) throws DataException
Sets the parameter at the specified index to the specified value. The stringValue is converted to the datatype associated with the parameter before the parameter is updated. The index of the first parameter is 1.

Parameters:
parameterNumber - index of the parameter
stringValue - parameter value as a String
Throws: IndexOutOfBoundsException
if the parameter index is not defined
Throws: DataException
if the value does match the object type of the parameter
See Also:
getParameterToString
setParameterFromString
 public void setParameterFromString(String parameterName,
                                    String stringValue) throws DataException
Sets the parameter with the specified name to the specified value. The stringValue is converted to the datatype associated with the parameter before the parameter is updated.

Parameters:
parameterName - name of the parameter
stringValue - parameter value as a String
Throws: IndexOutOfBoundsException
if the parameter name is not defined
Throws: DataException
if the value does match the object type of the parameter
See Also:
getParameterToString
setQuery
 public void setQuery(Query query)
Sets the connection alias and the SQL specification for this Select to the values contained in the specified Query. The Query itself is not saved.

Parameters:
query - the Query
See Also:
getQuery
setReadOnly
 public void setReadOnly(boolean readOnly)
If true, updates are disallowed even when the database would permit them. If false, updates are allowed as long as the database will permit them. The default value is false.

Parameters:
aValue - true if updates are disallowed; false if updates are allowed.
See Also:
isReadOnly
setStatementMetaData
 public void setStatementMetaData(StatementMetaData metaData)
Associates a StatementMetaData with the Select.

Parameters:
metaData - the associated StatementMetaData
See Also:
getStatementMetaData
setValueAt
 public void setValueAt(Object aValue,
                        int rowIndex,
                        int columnIndex)
Sets the specified cell in the cache to the specified value. The index of both the first row and the first column is 0. The cell value is not updated in the database until you move to another row or invoke updateRow.

The row in the result set that corresponds to the specified row in the cache is made the current row.

Returns:
the value of the specified cell
unlockRow
 public void unlockRow() throws DataException
Unlocks the current row. The database lock on the current row is released.

Throws: DataException
notExecuted - if statement has not been executed
Throws: DataException
noResults - if the result set is empty
Throws: DataException
readOnly - if the result set is read only
Throws: DataException
notOpen - if the result set is not open
Throws: DataException
sqlException - if a SQLException occurred
See Also:
lockRow
updatedRow
 public void updatedRow(DataEvent event)
Invoked when the underlying com.ibm.db.StatementResultAfter event updatedRow is triggerd and fires the corresponding DataAfter event updatedRow.

Parameters:
event - DataEvent
updateRow
 public void updateRow() throws DataException
Updates the database with the values of the current row in the result set. If the current row is a new row, it is INSERTed into the database. If it is an existing row, it is UPDATEd in the database.

For an existing row, before the database is updated, if the row is not already locked, the lockRow method is implicitly invoked to insure that no other user has updated or deleted the row in the database. A table must have been defined via addTable in order for this lock to be obtained. The database lock is released after the update unless the lockRows property is true. To insure that your update affects the intended row in the database, make sure the SQL statement includes columns that uniquely identify a row. See the lockRow method for a fuller discussion of these points.

The events aboutToUpdateRow and updatedRow are triggered by this method.

Throws: DataException
notExecuted - if statement has not been executed
Throws: DataException
noResults - if the result set is empty
Throws: DataException
readOnly - if the result set is read only
Throws: DataException
notOpen - if the result set is not open
Throws: DataException
rowChanged - if the current row cannot be updated in the database because it has been modified by another user since it was fetched
Throws: DataException
sqlException - if a SQLException occurred

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