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/*
*
* MariaDB Client for Java
*
* Copyright (c) 2012-2014 Monty Program Ab.
* Copyright (c) 2015-2017 MariaDB Ab.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License along
* with this library; if not, write to Monty Program Ab [email protected].
*
* This particular MariaDB Client for Java file is work
* derived from a Drizzle-JDBC. Drizzle-JDBC file which is covered by subject to
* the following copyright and notice provisions:
*
* Copyright (c) 2009-2011, Marcus Eriksson
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* Neither the name of the driver nor the names of its contributors may not be
* used to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
*/
package org.mariadb.jdbc.internal.com.send;
import org.mariadb.jdbc.internal.com.read.Buffer;
import org.mariadb.jdbc.internal.com.read.ErrorPacket;
import org.mariadb.jdbc.internal.com.read.resultset.ColumnInformation;
import org.mariadb.jdbc.internal.io.input.PacketInputStream;
import org.mariadb.jdbc.internal.io.output.PacketOutputStream;
import org.mariadb.jdbc.internal.protocol.Protocol;
import org.mariadb.jdbc.internal.util.dao.ServerPrepareResult;
import java.io.IOException;
import java.sql.SQLException;
import static org.mariadb.jdbc.internal.com.Packet.*;
public class ComStmtPrepare {
private final Protocol protocol;
private final String sql;
public ComStmtPrepare(Protocol protocol, String sql) {
this.protocol = protocol;
this.sql = sql;
}
/**
* Send directly to socket the sql data.
*
* @param pos the writer
* @throws IOException if connection error occur
*/
public void send(PacketOutputStream pos) throws IOException {
pos.startPacket(0);
pos.write(COM_STMT_PREPARE);
pos.write(sql);
pos.flush();
}
/**
* Read COM_PREPARE_RESULT.
*
* @param reader inputStream
* @param eofDeprecated are EOF_packet deprecated
* @return ServerPrepareResult prepare result
* @throws IOException if connection has error
* @throws SQLException if server answer with error.
*/
public ServerPrepareResult read(PacketInputStream reader, boolean eofDeprecated) throws IOException, SQLException {
Buffer buffer = reader.getPacket(true);
byte firstByte = buffer.getByteAt(buffer.position);
if (firstByte == ERROR) throw buildErrorException(buffer);
if (firstByte == OK) {
/* Prepared Statement OK */
buffer.readByte(); /* skip field count */
final int statementId = buffer.readInt();
final int numColumns = buffer.readShort() & 0xffff;
final int numParams = buffer.readShort() & 0xffff;
ColumnInformation[] params = new ColumnInformation[numParams];
ColumnInformation[] columns = new ColumnInformation[numColumns];
if (numParams > 0) {
for (int i = 0; i < numParams; i++) {
params[i] = new ColumnInformation(reader.getPacket(false));
}
if (numColumns > 0) {
if (!eofDeprecated) protocol.skipEofPacket();
for (int i = 0; i < numColumns; i++) {
columns[i] = new ColumnInformation(reader.getPacket(false));
}
}
if (!eofDeprecated) protocol.readEofPacket();
} else {
if (numColumns > 0) {
for (int i = 0; i < numColumns; i++) {
columns[i] = new ColumnInformation(reader.getPacket(false));
}
if (!eofDeprecated) protocol.readEofPacket();
} else {
//read warning only if no param / columns, because will be overwritten by EOF warning data
buffer.readByte(); // reserved
protocol.setHasWarnings(buffer.readShort() > 0);
}
}
ServerPrepareResult serverPrepareResult = new ServerPrepareResult(sql, statementId, columns, params, protocol);
if (protocol.getOptions().cachePrepStmts
&& protocol.getOptions().useServerPrepStmts
&& sql != null
&& sql.length() < protocol.getOptions().prepStmtCacheSqlLimit) {
String key = protocol.getDatabase() + "-" + sql;
ServerPrepareResult cachedServerPrepareResult = protocol.addPrepareInCache(key, serverPrepareResult);
return cachedServerPrepareResult != null ? cachedServerPrepareResult : serverPrepareResult;
}
return serverPrepareResult;
} else {
throw new SQLException("Unexpected packet returned by server, first byte " + firstByte);
}
}
private SQLException buildErrorException(Buffer buffer) {
ErrorPacket ep = new ErrorPacket(buffer);
String message = ep.getMessage();
if (1054 == ep.getErrorNumber()) {
return new SQLException(message
+ "\nIf column exists but type cannot be identified (example 'select ? `field1` from dual'). "
+ "Use CAST function to solve this problem (example 'select CAST(? as integer) `field1` from dual')",
ep.getSqlState(), ep.getErrorNumber());
} else {
return new SQLException(message, ep.getSqlState(), ep.getErrorNumber());
}
}
}
