Mercurial > hg > orthanc-databases

annotate Framework/MySQL/MySQLDatabase.cpp @ 67:714c5d2bee76

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preparing for 2019
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 24 Dec 2018 13:35:26 +0100
parents 412e30336847
children e26690365c25
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #include "MySQLDatabase.h"
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23
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24 #include "MySQLResult.h"
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25 #include "MySQLStatement.h"
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26 #include "MySQLTransaction.h"
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27 #include "../Common/ImplicitTransaction.h"
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28 #include "../Common/Integer64Value.h"
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29
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30 #include <Core/Logging.h>
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31 #include <Core/OrthancException.h>
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32 #include <Core/Toolbox.h>
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33
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34 #include <errmsg.h>
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35 #include <mysqld_error.h>
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36
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37 #include <memory>
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38
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39 namespace OrthancDatabases
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40 {
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41 void MySQLDatabase::Close()
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42 {
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43 if (mysql_ != NULL)
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44 {
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45 LOG(INFO) << "Closing connection to MySQL database";
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46 mysql_close(mysql_);
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47 mysql_ = NULL;
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48 }
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49 }
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51
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52 void MySQLDatabase::CheckErrorCode(int code)
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53 {
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54 if (code == 0)
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55 {
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56 return;
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57 }
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58 else
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59 {
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60 LogError();
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61
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62 unsigned int error = mysql_errno(mysql_);
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63 if (error == CR_SERVER_GONE_ERROR ||
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64 error == CR_SERVER_LOST ||
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65 error == ER_QUERY_INTERRUPTED)
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66 {
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67 throw Orthanc::OrthancException(Orthanc::ErrorCode_DatabaseUnavailable);
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68 }
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69 else
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70 {
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71 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database);
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72 }
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73 }
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74 }
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77 MySQLDatabase::MySQLDatabase(const MySQLParameters& parameters) :
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78 parameters_(parameters),
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79 mysql_(NULL)
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80 {
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81 }
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83
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84 MySQLDatabase::~MySQLDatabase()
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85 {
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86 try
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87 {
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88 Close();
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89 }
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90 catch (Orthanc::OrthancException&)
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91 {
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92 // Ignore possible exceptions due to connection loss
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93 }
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94 }
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95
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96
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97 void MySQLDatabase::LogError()
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98 {
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99 if (mysql_ != NULL)
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100 {
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101 LOG(ERROR) << "MySQL error (" << mysql_errno(mysql_)
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102 << "," << mysql_sqlstate(mysql_)
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103 << "): " << mysql_error(mysql_);
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104 }
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105 }
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106
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107
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108 MYSQL* MySQLDatabase::GetObject()
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109 {
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110 if (mysql_ == NULL)
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111 {
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112 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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113 }
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114 else
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115 {
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116 return mysql_;
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117 }
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118 }
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119
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120
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121 void MySQLDatabase::OpenInternal(const char* db)
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122 {
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123 if (mysql_ != NULL)
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124 {
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125 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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126 }
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127
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128 mysql_ = mysql_init(NULL);
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129 if (mysql_ == NULL)
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130 {
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131 LOG(ERROR) << "Cannot initialize the MySQL connector";
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132 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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133 }
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134
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135 if (parameters_.GetUnixSocket().empty())
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136 {
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137 // Fallback to TCP connection if no UNIX socket is provided
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138 unsigned int protocol = MYSQL_PROTOCOL_TCP;
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139 mysql_options(mysql_, MYSQL_OPT_PROTOCOL, (unsigned int *) &protocol);
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140 }
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141
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142 const char* socket = (parameters_.GetUnixSocket().empty() ? NULL :
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143 parameters_.GetUnixSocket().c_str());
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144
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145 if (mysql_real_connect(mysql_,
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146 parameters_.GetHost().c_str(),
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147 parameters_.GetUsername().c_str(),
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148 parameters_.GetPassword().c_str(), db,
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149 parameters_.GetPort(), socket, 0) == 0)
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150 {
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151 LogError();
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152 Close();
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153 throw Orthanc::OrthancException(Orthanc::ErrorCode_DatabaseUnavailable);
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154 }
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155 else
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156 {
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157 LOG(INFO) << "Successful connection to MySQL database";
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158 }
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159
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160 if (mysql_set_character_set(mysql_, "utf8mb4") != 0)
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161 {
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162 LOG(ERROR) << "Cannot set the character set to UTF8";
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163 Close();
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164 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database);
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165 }
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166 }
0
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167
23
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168
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169 void MySQLDatabase::Open()
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170 {
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171 if (parameters_.GetDatabase().empty())
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172 {
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173 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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174 }
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175 else
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176 {
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177 OpenInternal(parameters_.GetDatabase().c_str());
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178 }
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179 }
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180
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181
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182 void MySQLDatabase::ClearDatabase(const MySQLParameters& parameters)
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183 {
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184 MySQLDatabase db(parameters);
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185 db.OpenRoot();
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186
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187 const std::string& database = parameters.GetDatabase();
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188
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189 {
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190 MySQLTransaction t(db);
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191
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192 if (!db.DoesDatabaseExist(t, database))
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193 {
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194 LOG(ERROR) << "Inexistent database, please create it first: " << database;
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195 throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource);
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196 }
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197
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198 db.Execute("DROP DATABASE " + database, false);
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199 db.Execute("CREATE DATABASE " + database, false);
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200 t.Commit();
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201 }
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202 }
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203
0
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204
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205 namespace
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206 {
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207 class ResultWrapper : public boost::noncopyable
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208 {
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209 private:
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210 MYSQL_RES *result_;
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211
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212 public:
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213 ResultWrapper(MySQLDatabase& mysql,
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214 const std::string& sql) :
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215 result_(NULL)
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216 {
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217 if (mysql_real_query(mysql.GetObject(), sql.c_str(), sql.size()))
0
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218 {
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219 mysql.LogError();
0
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220 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database);
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221 }
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222
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223 result_ = mysql_use_result(mysql.GetObject());
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224 if (result_ == NULL)
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225 {
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226 mysql.LogError();
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227 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database);
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228 }
0
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229 }
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230
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231 ~ResultWrapper()
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232 {
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233 if (result_ != NULL)
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234 {
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235 mysql_free_result(result_);
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236 result_ = NULL;
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237 }
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238 }
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239
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240 MYSQL_RES *GetObject()
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241 {
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242 return result_;
0
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243 }
16
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244 };
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245 }
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246
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247
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248 bool MySQLDatabase::LookupGlobalStringVariable(std::string& value,
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249 const std::string& variable)
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250 {
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251 ResultWrapper result(*this, "SELECT @@global." + variable);
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252
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253 MYSQL_ROW row = mysql_fetch_row(result.GetObject());
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254 if (mysql_errno(mysql_) == 0 &&
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255 row &&
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256 row[0])
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257 {
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258 value = std::string(row[0]);
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259 return true;
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260 }
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261 else
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262 {
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263 return false;
0
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264 }
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265 }
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266
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267
16
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268 bool MySQLDatabase::LookupGlobalIntegerVariable(int64_t& value,
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269 const std::string& variable)
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270 {
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271 std::string s;
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272
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273 if (LookupGlobalStringVariable(s, variable))
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274 {
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275 try
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276 {
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277 value = boost::lexical_cast<int64_t>(s);
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278 return true;
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279 }
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280 catch (boost::bad_lexical_cast&)
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281 {
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282 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database);
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283 }
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284 }
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285 else
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286 {
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287 return false;
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288 }
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289 }
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290
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291
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292 void MySQLDatabase::AdvisoryLock(int32_t lock)
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293 {
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294 try
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295 {
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296 Query query("SELECT GET_LOCK('Lock" +
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297 boost::lexical_cast<std::string>(lock) + "', 0);", false);
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298 MySQLStatement statement(*this, query);
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299
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300 MySQLTransaction t(*this);
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301 Dictionary args;
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302
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303 std::auto_ptr<IResult> result(t.Execute(statement, args));
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304
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305 if (result->IsDone() ||
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306 result->GetField(0).GetType() != ValueType_Integer64 ||
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307 dynamic_cast<const Integer64Value&>(result->GetField(0)).GetValue() != 1)
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308 {
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309 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database);
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310 }
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311
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312 t.Commit();
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313 }
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314 catch (Orthanc::OrthancException&)
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315 {
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316 LOG(ERROR) << "The MySQL database is locked by another instance of Orthanc";
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317 Close();
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318 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database);
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319 }
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320 }
22
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321
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322
0
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323 bool MySQLDatabase::DoesTableExist(MySQLTransaction& transaction,
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324 const std::string& name)
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325 {
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326 if (mysql_ == NULL)
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327 {
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328 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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329 }
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330
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331 if (!IsValidDatabaseIdentifier(name))
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332 {
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333 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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334 }
22
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335
0
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336 Query query("SELECT COUNT(*) FROM information_schema.TABLES WHERE "
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337 "(TABLE_SCHEMA = ${database}) AND (TABLE_NAME = ${table})", true);
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338 query.SetType("database", ValueType_Utf8String);
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339 query.SetType("table", ValueType_Utf8String);
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340
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341 MySQLStatement statement(*this, query);
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342
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343 Dictionary args;
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344 args.SetUtf8Value("database", parameters_.GetDatabase());
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345 args.SetUtf8Value("table", name);
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346
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347 std::auto_ptr<IResult> result(statement.Execute(transaction, args));
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348 return (!result->IsDone() &&
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349 result->GetFieldsCount() == 1 &&
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350 result->GetField(0).GetType() == ValueType_Integer64 &&
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351 dynamic_cast<const Integer64Value&>(result->GetField(0)).GetValue() == 1);
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352 }
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353
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354
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355 bool MySQLDatabase::DoesDatabaseExist(MySQLTransaction& transaction,
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356 const std::string& name)
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357 {
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358 if (mysql_ == NULL)
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359 {
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360 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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361 }
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362
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363 if (!IsValidDatabaseIdentifier(name))
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364 {
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365 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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366 }
22
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367
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368 Query query("SELECT COUNT(*) FROM information_schema.SCHEMATA "
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369 "WHERE SCHEMA_NAME = ${database}", true);
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370 query.SetType("database", ValueType_Utf8String);
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371
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372 MySQLStatement statement(*this, query);
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373
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374 Dictionary args;
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375 args.SetUtf8Value("database", name);
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376
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377 std::auto_ptr<IResult> result(statement.Execute(transaction, args));
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378 return (!result->IsDone() &&
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379 result->GetFieldsCount() == 1 &&
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380 result->GetField(0).GetType() == ValueType_Integer64 &&
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381 dynamic_cast<const Integer64Value&>(result->GetField(0)).GetValue() == 1);
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382 }
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383
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384
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385 void MySQLDatabase::Execute(const std::string& sql,
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386 bool arobaseSeparator)
0
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387 {
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388 if (mysql_ == NULL)
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389 {
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390 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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391 }
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392
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393 // This emulates the behavior of "CLIENT_MULTI_STATEMENTS" in
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394 // "mysql_real_connect()", avoiding to implement a loop over
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395 // "mysql_query()"
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396 std::vector<std::string> commands;
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397 Orthanc::Toolbox::TokenizeString(commands, sql, ';');
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398
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399 for (size_t i = 0; i < commands.size(); i++)
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400 {
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401 std::string s = Orthanc::Toolbox::StripSpaces(commands[i]);
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402
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403 if (!s.empty())
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404 {
16
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diff changeset
405 if (arobaseSeparator)
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406 {
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407 // Replace the escape character "@" by a semicolon
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408 std::replace(s.begin(), s.end(), '@', ';');
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diff changeset
409 }
0
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410
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411 LOG(TRACE) << "MySQL: " << s;
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412 CheckErrorCode(mysql_query(mysql_, s.c_str()));
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413 }
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414 }
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415 }
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416
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417
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418 IPrecompiledStatement* MySQLDatabase::Compile(const Query& query)
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419 {
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420 if (mysql_ == NULL)
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421 {
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422 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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423 }
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424
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425 return new MySQLStatement(*this, query);
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426 }
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diff changeset
427
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428
23
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diff changeset
429
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430 namespace
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431 {
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432 class MySQLImplicitTransaction : public ImplicitTransaction
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433 {
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434 private:
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435 MySQLDatabase& db_;
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436
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437 protected:
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438 virtual IResult* ExecuteInternal(IPrecompiledStatement& statement,
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439 const Dictionary& parameters)
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440 {
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441 return dynamic_cast<MySQLStatement&>(statement).Execute(*this, parameters);
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442 }
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443
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444 virtual void ExecuteWithoutResultInternal(IPrecompiledStatement& statement,
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445 const Dictionary& parameters)
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446 {
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447 dynamic_cast<MySQLStatement&>(statement).ExecuteWithoutResult(*this, parameters);
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448 }
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449
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450 public:
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451 MySQLImplicitTransaction(MySQLDatabase& db) :
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452 db_(db)
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453 {
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454 }
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455 };
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456 }
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457
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458
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459 ITransaction* MySQLDatabase::CreateTransaction(bool isImplicit)
0
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460 {
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461 if (mysql_ == NULL)
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462 {
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463 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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464 }
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465
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466 if (isImplicit)
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467 {
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468 return new MySQLImplicitTransaction(*this);
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469 }
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470 else
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471 {
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472 return new MySQLTransaction(*this);
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473 }
0
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474 }
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475
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476
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477 void MySQLDatabase::GlobalFinalization()
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478 {
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479 mysql_library_end();
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480 }
24
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481
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482
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483 bool MySQLDatabase::IsValidDatabaseIdentifier(const std::string& s)
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484 {
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485 for (size_t i = 0; i < s.length(); i++)
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486 {
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487 // https://dev.mysql.com/doc/refman/8.0/en/identifiers.html
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488 if (!isalnum(s[i]) &&
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489 s[i] != '$' &&
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490 s[i] != '_')
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491 {
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492 return false;
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493 }
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494 }
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495
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496 return true;
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497 }
0
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498 }