pack-priv Class MiscResultSet

Class Inheritance

extends NoRowsResultSetImpl

java.lang.Object
org.apache.derby.impl.sql.execute.NoRowsResultSetImpl
org.apache.derby.impl.sql.execute.MiscResultSet

Known Direct Subclasses

org.apache.derby.impl.sql.execute.SetTransactionResultSet

Imports

org.apache.derby.shared.common.error.StandardException, org.apache.derby.iapi.sql.Activation

This is a wrapper class which invokes the Execution-time logic for Misc statements. The real Execution-time logic lives inside the executeConstantAction() method. Note that when re-using the language result set tree across executions (DERBY-827) it is not possible to store the ConstantAction as a member variable, because a re-prepare of the statement will invalidate the stored ConstantAction. Re-preparing a statement does not create a new Activation unless the GeneratedClass has changed, so the existing result set tree may survive a re-prepare.

Field Summary

Inherited from org.apache.derby.impl.sql.execute.NoRowsResultSetImpl:: activation beginExecutionTime beginTime endExecutionTime endTime lcc

Constructor Summary

Access	Constructor and Description
pack-priv	MiscResultSet(Activation Describes run-time environment. activation) Construct a MiscResultSet

Method Summary

Modifier and Type	Method and Description
public void	cleanUp() Implements org.apache.derby.iapi.sql.ResultSet.cleanUp. No action is required, but not implemented in any base class
public void	close() Implements org.apache.derby.iapi.sql.ResultSet.close. Tells the system that there will be no more calls to getNextRow() (until the next open() call), so it can free up the resources associated with the ResultSet.
public void	open() Implements org.apache.derby.iapi.sql.ResultSet.open. Opens a MiscResultSet, executes the Activation's ConstantAction, and then immediately closes the MiscResultSet.

Constructor Detail

MiscResultSet	back to summary
pack-priv MiscResultSet(Activation activation) Construct a MiscResultSet Parameters activation:Activation Describes run-time environment.

MiscResultSet

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pack-priv MiscResultSet(Activation activation)

Construct a MiscResultSet

Parameters

activation:Activation: Describes run-time environment.

Method Detail

cleanUp back to summary

cleanUp	back to summary
public void cleanUp() Implements org.apache.derby.iapi.sql.ResultSet.cleanUp. No action is required, but not implemented in any base class See Also `org.apache.derby.iapi.sql.ResultSet#cleanUp`

public void cleanUp()

Implements org.apache.derby.iapi.sql.ResultSet.cleanUp.

No action is required, but not implemented in any base class

See Also: org.apache.derby.iapi.sql.ResultSet#cleanUp

close	back to summary
public void close() throws StandardException Implements org.apache.derby.iapi.sql.ResultSet.close. Doc from org.apache.derby.iapi.sql.ResultSet.close. Tells the system that there will be no more calls to getNextRow() (until the next open() call), so it can free up the resources associated with the ResultSet. Exceptions StandardException: Thrown on error.

back to summary

public void close() throws StandardException

Implements org.apache.derby.iapi.sql.ResultSet.close.

Doc from org.apache.derby.iapi.sql.ResultSet.close.

Tells the system that there will be no more calls to getNextRow() (until the next open() call), so it can free up the resources associated with the ResultSet.

Exceptions

StandardException:: Thrown on error.

open	back to summary
public void open() throws StandardException Implements org.apache.derby.iapi.sql.ResultSet.open. Opens a MiscResultSet, executes the Activation's ConstantAction, and then immediately closes the MiscResultSet. Exceptions StandardException: Standard Derby error policy.

open

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public void open() throws StandardException

Implements org.apache.derby.iapi.sql.ResultSet.open.

Opens a MiscResultSet, executes the Activation's ConstantAction, and then immediately closes the MiscResultSet.

Exceptions

StandardException:: Standard Derby error policy.