/*
* Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software;Designed and Developed mainly by many Chinese
* opensource volunteers. you can redistribute it and/or modify it under the
* terms of the GNU General Public License version 2 only, as published by the
* Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Any questions about this component can be directed to it's project Web address
* https://code.google.com/p/opencloudb/.
*
*/
package org.opencloudb.server.response;
import java.nio.ByteBuffer;
import org.opencloudb.config.Fields;
import org.opencloudb.mysql.PacketUtil;
import org.opencloudb.net.mysql.EOFPacket;
import org.opencloudb.net.mysql.FieldPacket;
import org.opencloudb.net.mysql.ResultSetHeaderPacket;
import org.opencloudb.net.mysql.RowDataPacket;
import org.opencloudb.parser.util.ParseUtil;
import org.opencloudb.server.ServerConnection;
import org.opencloudb.util.LongUtil;
/**
* @author mycat
*/
public class SelectLastInsertId {
private static final String ORG_NAME = "LAST_INSERT_ID()";
private static final int FIELD_COUNT = 1;
private static final ResultSetHeaderPacket header = PacketUtil.getHeader(FIELD_COUNT);
static {
byte packetId = 0;
header.packetId = ++packetId;
}
public static void response(ServerConnection c, String stmt, int aliasIndex) {
String alias = ParseUtil.parseAlias(stmt, aliasIndex);
if (alias == null) {
alias = ORG_NAME;
}
ByteBuffer buffer = c.allocate();
// write header
buffer = header.write(buffer, c,true);
// write fields
byte packetId = header.packetId;
FieldPacket field = PacketUtil.getField(alias, ORG_NAME, Fields.FIELD_TYPE_LONGLONG);
field.packetId = ++packetId;
buffer = field.write(buffer, c,true);
// write eof
EOFPacket eof = new EOFPacket();
eof.packetId = ++packetId;
buffer = eof.write(buffer, c,true);
// write rows
RowDataPacket row = new RowDataPacket(FIELD_COUNT);
row.add(LongUtil.toBytes(c.getLastInsertId()));
row.packetId = ++packetId;
buffer = row.write(buffer, c,true);
// write last eof
EOFPacket lastEof = new EOFPacket();
lastEof.packetId = ++packetId;
buffer = lastEof.write(buffer, c,true);
// post write
c.write(buffer);
}
}