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annotate C++/Driver.cpp @ 211:04aa866535fb

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Merge
author David Demelier <markand@malikania.fr>
date Sat, 22 Mar 2014 22:02:24 +0100
parents cc1e5fe1ee2c
children 6c49e5e3ecc8
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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 oss << "Invalid row index " << row;
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50 oss << ", expected [0.." << countRows() << "]";
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51
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52 throw Error(oss.str());
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53 }
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54
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55 // Not found or bad column?
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56 if (type(column) != wanted) {
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57 oss << "Invalid or not found column `" << column << "'";
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58
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59 throw Error(oss.str());
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60 }
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61 }
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62
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63 Query::~Query()
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64 {
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65 }
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66
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67 template <>
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68 bool Query::get(int row, const std::string &column)
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69 {
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70 assertRequest(row, column, ColumnType::Boolean);
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71
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72 return getBoolean(row, column);
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73 }
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74
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75 template <>
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76 Date Query::get(int row, const std::string &column)
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77 {
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78 assertRequest(row, column, ColumnType::Date);
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79
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80 return getDate(row, column);
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81 }
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82
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83 template <>
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84 double Query::get(int row, const std::string &column)
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85 {
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86 assertRequest(row, column, ColumnType::Double);
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87
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88 return getDouble(row, column);
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89 }
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90
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91 template <>
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92 int Query::get(int row, const std::string &column)
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93 {
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94 assertRequest(row, column, ColumnType::Integer);
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95
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96 return getInt(row, column);
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97 }
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98
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99 template <>
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100 std::string Query::get(int row, const std::string &column)
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101 {
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102 assertRequest(row, column, ColumnType::String);
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103
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104 return getString(row, column);
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105 }
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106
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107 /* --------------------------------------------------------
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108 * Request class
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109 * -------------------------------------------------------- */
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110
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111 Request::Request(const std::string &command)
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112 : m_pos(0)
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113 , m_params(0)
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114 , m_command(command)
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115 {
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116 int i = -1;
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117
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118 while ((i = command.find('#', i + 1)) != std::string::npos)
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119 ++ m_params;
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120 }
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121
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122 Request::~Request()
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123 {
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124 }
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125
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126 void Request::assertCorrect()
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127 {
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128 if (m_params <= 0)
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129 throw std::runtime_error("no more arguments to set");
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130 }
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131
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132 void Request::setValue(const std::string &value)
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133 {
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134 assertCorrect();
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135
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136 m_pos = m_command.find('#', m_pos);
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137 m_command.replace(m_pos, 1, value);
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138 m_pos += value.length();
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139 m_params --;
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140 }
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141
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142 template <>
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143 void Request::bind(bool value)
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144 {
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145 setValue(bindBoolean(value));
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146 }
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147
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148 template <>
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149 void Request::bind(Date value)
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150 {
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151 setValue(bindDate(value));
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152 }
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153
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154 template <>
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155 void Request::bind(double value)
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156 {
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157 setValue(bindDouble(value));
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158 }
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159
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160 template <>
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161 void Request::bind(int value)
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162 {
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163 setValue(bindInt(value));
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164 }
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165
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166 template <>
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167 void Request::bind(std::string value)
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168 {
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169 setValue(bindString(value));
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170 }
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171
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172 template <>
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173 void Request::bind(const char *value)
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174 {
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175 setValue(bindString(value));
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176 }
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177
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178 Request::operator std::string()
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179 {
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180 return m_command;
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181 }
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182
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183 /* --------------------------------------------------------
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184 * Driver class
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185 * -------------------------------------------------------- */
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186
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187 Driver::Driver()
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188 {
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189 }
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190
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191 Driver::~Driver()
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192 {
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193 }
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194
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195 const std::string &Driver::getError() const
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196 {
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197 return m_error;
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198 }
184
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199
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200 Query::Ptr Driver::query(Request::Ptr request)
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201 {
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202 return query(static_cast<std::string>(*request));
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203 }