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annotate C++/Driver.cpp @ 184:4c746050969a

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Add support for request (PostgreSQL done) Task: #199
author David Demelier <markand@malikania.fr>
date Mon, 11 Nov 2013 18:05:47 +0100
parents f0cca031bcce
children cc1e5fe1ee2c
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1 /*
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2 * Driver.cpp -- generic SQL driver access
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3 *
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4 * Copyright (c) 2013, David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include <map>
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20 #include <string>
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21 #include <sstream>
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22
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23 #include "Driver.h"
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24
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25 /* ---------------------------------------------------------
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26 * Query::Error class
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27 * --------------------------------------------------------- */
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28
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29 Query::Error::Error(const std::string &error)
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30 : m_error(error)
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31 {
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32 }
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33
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34 const char *Query::Error::Error::what() const throw()
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35 {
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36 return m_error.c_str();
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37 }
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38
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39 /* ---------------------------------------------------------
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40 * Query class
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41 * ---------------------------------------------------------*/
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42
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43 void Query::assertRequest(int row, const std::string &column, ColumnType wanted)
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44 {
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45 std::ostringstream oss;
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46
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47 // Out of bounds?
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48 if (row < 0 || row >= countRows())
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49 {
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50 oss << "Invalid row index " << row;
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51 oss << ", expected [0.." << countRows() << "]";
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52
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53 throw Error(oss.str());
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54 }
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55
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56 // Not found or bad column?
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57 if (type(column) != wanted)
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58 {
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59 oss << "Invalid or not found column `" << column << "'";
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60
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61 throw Error(oss.str());
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62 }
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63 }
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64
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65 Query::~Query()
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66 {
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67 }
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68
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69 template <>
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70 bool Query::get(int row, const std::string &column)
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71 {
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72 assertRequest(row, column, ColumnType::Boolean);
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73
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74 return getBoolean(row, column);
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75 }
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76
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77 template <>
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78 Date Query::get(int row, const std::string &column)
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79 {
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80 assertRequest(row, column, ColumnType::Date);
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81
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82 return getDate(row, column);
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83 }
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84
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85 template <>
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86 double Query::get(int row, const std::string &column)
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87 {
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88 assertRequest(row, column, ColumnType::Double);
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89
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90 return getDouble(row, column);
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91 }
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92
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93 template <>
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94 int Query::get(int row, const std::string &column)
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95 {
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96 assertRequest(row, column, ColumnType::Integer);
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97
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98 return getInt(row, column);
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99 }
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100
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101 template <>
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102 std::string Query::get(int row, const std::string &column)
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103 {
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104 assertRequest(row, column, ColumnType::String);
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105
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106 return getString(row, column);
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107 }
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108
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109 /* --------------------------------------------------------
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110 * Request class
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111 * -------------------------------------------------------- */
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112
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113 Request::Request(const std::string &command)
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114 : m_pos(0)
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115 , m_params(0)
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116 , m_command(command)
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117 {
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118 int i = -1;
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119
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120 while ((i = command.find('#', i + 1)) != std::string::npos)
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121 ++ m_params;
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122 }
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123
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124 Request::~Request()
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125 {
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126 }
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127
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128 void Request::assertCorrect()
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129 {
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130 if (m_params <= 0)
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131 throw std::runtime_error("no more arguments to set");
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132 }
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133
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134 void Request::setValue(const std::string &value)
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135 {
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136 assertCorrect();
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137
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138 m_pos = m_command.find('#', m_pos);
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139 m_command.replace(m_pos, 1, value);
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140 m_pos += value.length();
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141 m_params --;
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142 }
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143
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144 template <>
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145 void Request::bind(bool value)
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146 {
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147 setValue(bindBoolean(value));
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148 }
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149
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150 template <>
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151 void Request::bind(Date value)
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152 {
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153 setValue(bindDate(value));
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154 }
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155
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156 template <>
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157 void Request::bind(double value)
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158 {
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159 setValue(bindDouble(value));
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160 }
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161
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162 template <>
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163 void Request::bind(int value)
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164 {
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165 setValue(bindInt(value));
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166 }
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167
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168 template <>
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169 void Request::bind(std::string value)
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170 {
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171 setValue(bindString(value));
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172 }
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173
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174 template <>
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175 void Request::bind(const char *value)
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176 {
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177 setValue(bindString(value));
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178 }
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179
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180 Request::operator std::string()
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181 {
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182 return m_command;
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183 }
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184
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185 /* --------------------------------------------------------
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186 * Driver class
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187 * -------------------------------------------------------- */
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188
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189 Driver::Driver()
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190 {
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191 }
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192
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193 Driver::~Driver()
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194 {
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195 }
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196
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197 const std::string &Driver::getError() const
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198 {
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199 return m_error;
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200 }
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201
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202 Query::Ptr Driver::query(Request::Ptr request)
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203 {
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204 return query(static_cast<std::string>(*request));
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205 }