updatablevticonstantaction.java

derby database source code.good for you.

/*

   Derby - Class org.apache.derby.impl.sql.execute.UpdatableVTIConstantAction

   Copyright 2000, 2004 The Apache Software Foundation or its licensors, as applicable.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

 */

package org.apache.derby.impl.sql.execute;

import org.apache.derby.iapi.services.stream.HeaderPrintWriter;


import org.apache.derby.iapi.services.io.ArrayUtil;
import org.apache.derby.iapi.services.io.StoredFormatIds;
import org.apache.derby.iapi.services.io.FormatIdUtil;

import org.apache.derby.iapi.sql.dictionary.IndexRowGenerator;

import org.apache.derby.iapi.sql.execute.ConstantAction;
import org.apache.derby.iapi.sql.execute.ExecRow;

import org.apache.derby.iapi.sql.Activation;

import org.apache.derby.iapi.error.StandardException;

import org.apache.derby.iapi.store.access.StaticCompiledOpenConglomInfo;

import org.apache.derby.catalog.UUID;

import java.io.ObjectOutput;
import java.io.ObjectInput;
import java.io.IOException;
import java.io.Serializable;

import java.sql.PreparedStatement;
import java.sql.SQLException;

import java.util.Properties;

/**
 *	This class  describes compiled constants that are passed into
 *	Updatable VTIResultSets.
 *
 *	@author Jerry Brenner
 */

public class UpdatableVTIConstantAction extends WriteCursorConstantAction
{

	/********************************************************
	**
	**	This class implements Formatable. But it is NOT used
 	**	across either major or minor releases.  It is only
	** 	written persistently in stored prepared statements, 
	**	not in the replication stage.  SO, IT IS OK TO CHANGE
	**	ITS read/writeExternal.
	**
	********************************************************/

	public int[]	changedColumnIds;

    public int statementType;
    
	// CONSTRUCTORS

	/**
	 * Public niladic constructor. Needed for Formatable interface to work.
	 *
	 */
    public	UpdatableVTIConstantAction() { super(); }

	/**
	 *	Make the ConstantAction for an updatable VTI statement.
	 *
	 * @param deferred					Whether or not to do operation in deferred mode
     * @param changedColumnIds Array of ids of changed columns
	 *
	 */
	public	UpdatableVTIConstantAction( int statementType,
                                        boolean deferred,
                                        int[] changedColumnIds)
	{
		super(0, 
			  null,
			  null, 
			  null, 
			  null,
			  null, 
			  deferred	, 
			  null,
			  null,
			  0,
			  null,	
			  null,
			  (ExecRow)null, // never need to pass in a heap row
			  null,
			  null,
			  null,
			  // singleRowSource, irrelevant
			  false
			  );
        this.statementType = statementType;
        this.changedColumnIds = changedColumnIds;
	}

	// INTERFACE METHODS

	/**
	 * Does this constant action modify the passed in table
	 * uuid?  By modify we mean add or drop things tied to
	 * this table (e.g. index, trigger, constraint).  Things
	 * like views or spses that reference this table don't
	 * count.
	 *
	 * @param tableId on error
	 *
	 */
	public boolean modifiesTableId(UUID tableId)
	{
		return false;
	}

	/**
	 * Get the formatID which corresponds to this class.
	 *
	 *	@return	the formatID of this class
	 */
	public	int	getTypeFormatId()	{ return StoredFormatIds.UPDATABLE_VTI_CONSTANT_ACTION_V01_ID; }


	/**
	 *	NOP routine. The work is done in subclass.
	 *
	 *	@see ConstantAction#executeConstantAction
	 *
	 * @exception StandardException		Thrown on failure
	 */
	public void	executeConstantAction( Activation activation )
		throws StandardException { }

	// CLASS METHODS

}