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Core/DBLayer: Support using mysql 8
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Shauren
274
src/server/database/Database/MySQLPreparedStatement.cpp
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274
src/server/database/Database/MySQLPreparedStatement.cpp
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/*
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* Copyright (C) 2008-2019 TrinityCore <https://www.trinitycore.org/>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "MySQLPreparedStatement.h"
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#include "Errors.h"
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#include "Log.h"
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#include "MySQLHacks.h"
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#include "PreparedStatement.h"
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#include <sstream>
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MySQLPreparedStatement::MySQLPreparedStatement(MySQLStmt* stmt, std::string queryString) :
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m_stmt(nullptr), m_Mstmt(stmt), m_bind(nullptr), m_queryString(std::move(queryString))
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{
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/// Initialize variable parameters
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m_paramCount = mysql_stmt_param_count(stmt);
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m_paramsSet.assign(m_paramCount, false);
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m_bind = new MySQLBind[m_paramCount];
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memset(m_bind, 0, sizeof(MySQLBind) * m_paramCount);
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/// "If set to 1, causes mysql_stmt_store_result() to update the metadata MYSQL_FIELD->max_length value."
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MySQLBool bool_tmp = MySQLBool(1);
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mysql_stmt_attr_set(stmt, STMT_ATTR_UPDATE_MAX_LENGTH, &bool_tmp);
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}
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MySQLPreparedStatement::~MySQLPreparedStatement()
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{
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ClearParameters();
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if (m_Mstmt->bind_result_done)
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{
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delete[] m_Mstmt->bind->length;
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delete[] m_Mstmt->bind->is_null;
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}
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mysql_stmt_close(m_Mstmt);
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delete[] m_bind;
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}
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void MySQLPreparedStatement::ClearParameters()
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{
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for (uint32 i=0; i < m_paramCount; ++i)
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{
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delete m_bind[i].length;
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m_bind[i].length = NULL;
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delete[] (char*) m_bind[i].buffer;
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m_bind[i].buffer = NULL;
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m_paramsSet[i] = false;
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}
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}
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static bool ParamenterIndexAssertFail(uint32 stmtIndex, uint8 index, uint32 paramCount)
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{
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TC_LOG_ERROR("sql.driver", "Attempted to bind parameter %u%s on a PreparedStatement %u (statement has only %u parameters)", uint32(index) + 1, (index == 1 ? "st" : (index == 2 ? "nd" : (index == 3 ? "rd" : "nd"))), stmtIndex, paramCount);
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return false;
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}
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static void SetParameterValue(MYSQL_BIND* param, enum_field_types type, const void* value, uint32 len, bool isUnsigned)
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{
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param->buffer_type = type;
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delete[] static_cast<char *>(param->buffer);
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param->buffer = new char[len];
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param->buffer_length = 0;
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param->is_null_value = 0;
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param->length = NULL; // Only != NULL for strings
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param->is_unsigned = isUnsigned;
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memcpy(param->buffer, value, len);
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}
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//- Bind on mysql level
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void MySQLPreparedStatement::AssertValidIndex(uint8 index)
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{
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ASSERT(index < m_paramCount || ParamenterIndexAssertFail(m_stmt->m_index, index, m_paramCount));
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if (m_paramsSet[index])
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TC_LOG_ERROR("sql.sql", "[ERROR] Prepared Statement (id: %u) trying to bind value on already bound index (%u).", m_stmt->m_index, index);
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}
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void MySQLPreparedStatement::setNull(const uint8 index)
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{
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AssertValidIndex(index);
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m_paramsSet[index] = true;
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MYSQL_BIND* param = &m_bind[index];
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param->buffer_type = MYSQL_TYPE_NULL;
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delete[] static_cast<char *>(param->buffer);
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param->buffer = NULL;
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param->buffer_length = 0;
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param->is_null_value = 1;
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delete param->length;
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param->length = NULL;
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}
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void MySQLPreparedStatement::setBool(const uint8 index, const bool value)
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{
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setUInt8(index, value ? 1 : 0);
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}
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void MySQLPreparedStatement::setUInt8(const uint8 index, const uint8 value)
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{
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AssertValidIndex(index);
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m_paramsSet[index] = true;
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MYSQL_BIND* param = &m_bind[index];
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SetParameterValue(param, MYSQL_TYPE_TINY, &value, sizeof(uint8), true);
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}
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void MySQLPreparedStatement::setUInt16(const uint8 index, const uint16 value)
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{
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AssertValidIndex(index);
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m_paramsSet[index] = true;
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MYSQL_BIND* param = &m_bind[index];
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SetParameterValue(param, MYSQL_TYPE_SHORT, &value, sizeof(uint16), true);
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}
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void MySQLPreparedStatement::setUInt32(const uint8 index, const uint32 value)
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{
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AssertValidIndex(index);
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m_paramsSet[index] = true;
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MYSQL_BIND* param = &m_bind[index];
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SetParameterValue(param, MYSQL_TYPE_LONG, &value, sizeof(uint32), true);
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}
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void MySQLPreparedStatement::setUInt64(const uint8 index, const uint64 value)
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{
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AssertValidIndex(index);
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m_paramsSet[index] = true;
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MYSQL_BIND* param = &m_bind[index];
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SetParameterValue(param, MYSQL_TYPE_LONGLONG, &value, sizeof(uint64), true);
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}
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void MySQLPreparedStatement::setInt8(const uint8 index, const int8 value)
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{
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AssertValidIndex(index);
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m_paramsSet[index] = true;
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MYSQL_BIND* param = &m_bind[index];
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SetParameterValue(param, MYSQL_TYPE_TINY, &value, sizeof(int8), false);
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}
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void MySQLPreparedStatement::setInt16(const uint8 index, const int16 value)
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{
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AssertValidIndex(index);
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m_paramsSet[index] = true;
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MYSQL_BIND* param = &m_bind[index];
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SetParameterValue(param, MYSQL_TYPE_SHORT, &value, sizeof(int16), false);
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}
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void MySQLPreparedStatement::setInt32(const uint8 index, const int32 value)
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{
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AssertValidIndex(index);
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m_paramsSet[index] = true;
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MYSQL_BIND* param = &m_bind[index];
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SetParameterValue(param, MYSQL_TYPE_LONG, &value, sizeof(int32), false);
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}
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void MySQLPreparedStatement::setInt64(const uint8 index, const int64 value)
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{
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AssertValidIndex(index);
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m_paramsSet[index] = true;
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MYSQL_BIND* param = &m_bind[index];
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SetParameterValue(param, MYSQL_TYPE_LONGLONG, &value, sizeof(int64), false);
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}
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void MySQLPreparedStatement::setFloat(const uint8 index, const float value)
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{
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AssertValidIndex(index);
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m_paramsSet[index] = true;
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MYSQL_BIND* param = &m_bind[index];
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SetParameterValue(param, MYSQL_TYPE_FLOAT, &value, sizeof(float), (value > 0.0f));
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}
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void MySQLPreparedStatement::setDouble(const uint8 index, const double value)
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{
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AssertValidIndex(index);
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m_paramsSet[index] = true;
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MYSQL_BIND* param = &m_bind[index];
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SetParameterValue(param, MYSQL_TYPE_DOUBLE, &value, sizeof(double), (value > 0.0f));
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}
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void MySQLPreparedStatement::setBinary(const uint8 index, const std::vector<uint8>& value, bool isString)
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{
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AssertValidIndex(index);
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m_paramsSet[index] = true;
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MYSQL_BIND* param = &m_bind[index];
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uint32 len = uint32(value.size());
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param->buffer_type = MYSQL_TYPE_BLOB;
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delete [] static_cast<char *>(param->buffer);
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param->buffer = new char[len];
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param->buffer_length = len;
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param->is_null_value = 0;
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delete param->length;
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param->length = new unsigned long(len);
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if (isString)
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{
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*param->length -= 1;
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param->buffer_type = MYSQL_TYPE_VAR_STRING;
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}
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memcpy(param->buffer, value.data(), len);
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}
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std::string MySQLPreparedStatement::getQueryString() const
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{
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std::string queryString(m_queryString);
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size_t pos = 0;
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for (uint32 i = 0; i < m_stmt->statement_data.size(); i++)
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{
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pos = queryString.find('?', pos);
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std::stringstream ss;
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switch (m_stmt->statement_data[i].type)
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{
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case TYPE_BOOL:
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ss << uint16(m_stmt->statement_data[i].data.boolean);
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break;
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case TYPE_UI8:
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ss << uint16(m_stmt->statement_data[i].data.ui8); // stringstream will append a character with that code instead of numeric representation
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break;
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case TYPE_UI16:
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ss << m_stmt->statement_data[i].data.ui16;
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break;
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case TYPE_UI32:
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ss << m_stmt->statement_data[i].data.ui32;
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break;
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case TYPE_I8:
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ss << int16(m_stmt->statement_data[i].data.i8); // stringstream will append a character with that code instead of numeric representation
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break;
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case TYPE_I16:
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ss << m_stmt->statement_data[i].data.i16;
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break;
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case TYPE_I32:
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ss << m_stmt->statement_data[i].data.i32;
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break;
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case TYPE_UI64:
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ss << m_stmt->statement_data[i].data.ui64;
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break;
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case TYPE_I64:
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ss << m_stmt->statement_data[i].data.i64;
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break;
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case TYPE_FLOAT:
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ss << m_stmt->statement_data[i].data.f;
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break;
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case TYPE_DOUBLE:
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ss << m_stmt->statement_data[i].data.d;
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break;
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case TYPE_STRING:
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ss << '\'' << (char const*)m_stmt->statement_data[i].binary.data() << '\'';
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break;
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case TYPE_BINARY:
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ss << "BINARY";
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break;
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case TYPE_NULL:
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ss << "NULL";
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break;
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}
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std::string replaceStr = ss.str();
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queryString.replace(pos, 1, replaceStr);
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pos += replaceStr.length();
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}
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return queryString;
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}
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