Mercurial > hg > orthanc-databases

annotate Framework/Common/DatabaseManager.h @ 214:ab96698c73a3

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removed useless information about read-only in ITransaction and IPrecompiledStatement
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 25 Mar 2021 13:56:26 +0100
parents d9ef3f16e6a2
children 73cc85f3d9c1
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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) 2017-2021 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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21
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22 #pragma once
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23
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24 #include "IDatabaseFactory.h"
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25 #include "StatementLocation.h"
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27 #include <Compatibility.h> // For std::unique_ptr<>
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28 #include <Enumerations.h>
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30 #include <boost/thread/recursive_mutex.hpp>
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31 #include <memory>
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32
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33 namespace OrthancDatabases
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34 {
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35 class DatabaseManager : public boost::noncopyable
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36 {
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37 private:
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38 typedef std::map<StatementLocation, IPrecompiledStatement*> CachedStatements;
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39
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40 boost::recursive_mutex mutex_;
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41 std::unique_ptr<IDatabaseFactory> factory_;
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42 std::unique_ptr<IDatabase> database_;
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43 std::unique_ptr<ITransaction> transaction_;
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44 CachedStatements cachedStatements_;
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45 Dialect dialect_;
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46
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47 IDatabase& GetDatabase();
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48
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49 void CloseIfUnavailable(Orthanc::ErrorCode e);
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50
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51 IPrecompiledStatement* LookupCachedStatement(const StatementLocation& location) const;
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52
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53 IPrecompiledStatement& CacheStatement(const StatementLocation& location,
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54 const Query& query);
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55
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56 ITransaction& GetTransaction();
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57
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58 void ReleaseImplicitTransaction();
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59
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60 public:
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61 explicit DatabaseManager(IDatabaseFactory* factory); // Takes ownership
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62
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63 ~DatabaseManager()
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64 {
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65 Close();
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66 }
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67
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68 Dialect GetDialect() const
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69 {
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70 return dialect_;
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71 }
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72
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73 void Open()
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74 {
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75 GetDatabase();
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76 }
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78 void Close();
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79
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80 void StartTransaction(TransactionType type);
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81
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82 void CommitTransaction();
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83
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84 void RollbackTransaction();
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85
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86
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87 // This class is only used in the "StorageBackend"
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88 class Transaction : public boost::noncopyable
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89 {
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90 private:
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91 boost::recursive_mutex::scoped_lock lock_;
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92 DatabaseManager& manager_;
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93 IDatabase& database_;
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94 bool committed_;
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95
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96 public:
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97 explicit Transaction(DatabaseManager& manager,
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98 TransactionType type);
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99
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100 ~Transaction();
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101
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102 void Commit();
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103
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104 DatabaseManager& GetManager()
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105 {
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106 return manager_;
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107 }
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108
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109 IDatabase& GetDatabase()
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110 {
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111 return database_;
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112 }
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113 };
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114
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115
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116 class StatementBase : public boost::noncopyable
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117 {
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118 private:
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119 DatabaseManager& manager_;
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120 boost::recursive_mutex::scoped_lock lock_;
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121 ITransaction& transaction_;
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122 std::unique_ptr<Query> query_;
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123 std::unique_ptr<IResult> result_;
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124
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125 IResult& GetResult() const;
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126
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127 protected:
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128 DatabaseManager& GetManager() const
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129 {
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130 return manager_;
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131 }
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132
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133 ITransaction& GetTransaction() const
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134 {
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135 return transaction_;
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136 }
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137
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138 void SetQuery(Query* query);
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139
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140 void SetResult(IResult* result);
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141
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142 void ClearResult()
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143 {
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144 result_.reset();
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145 }
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147 Query* ReleaseQuery()
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148 {
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149 return query_.release();
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150 }
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151
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152 public:
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153 explicit StatementBase(DatabaseManager& manager);
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154
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155 virtual ~StatementBase();
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156
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157 // Used only by SQLite
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158 IDatabase& GetDatabase()
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159 {
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160 return manager_.GetDatabase();
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161 }
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162
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163 void SetReadOnly(bool readOnly);
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164
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165 void SetParameterType(const std::string& parameter,
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166 ValueType type);
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167
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168 bool IsDone() const;
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169
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170 void Next();
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171
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172 size_t GetResultFieldsCount() const;
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173
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174 void SetResultFieldType(size_t field,
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175 ValueType type);
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176
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177 const IValue& GetResultField(size_t index) const;
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178 };
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179
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180
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181 class CachedStatement : public StatementBase
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182 {
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183 private:
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184 StatementLocation location_;
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185 IPrecompiledStatement* statement_;
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186
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187 public:
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188 CachedStatement(const StatementLocation& location,
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189 DatabaseManager& manager,
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190 const std::string& sql);
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191
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192 void Execute()
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193 {
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194 Dictionary parameters;
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195 Execute(parameters);
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196 }
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197
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198 void Execute(const Dictionary& parameters);
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199 };
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200
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201
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202 class StandaloneStatement : public StatementBase
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203 {
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204 private:
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205 std::unique_ptr<IPrecompiledStatement> statement_;
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206
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207 public:
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208 StandaloneStatement(DatabaseManager& manager,
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209 const std::string& sql);
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210
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211 virtual ~StandaloneStatement();
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212
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213 void Execute()
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214 {
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215 Dictionary parameters;
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216 Execute(parameters);
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217 }
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218
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219 void Execute(const Dictionary& parameters);
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220 };
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221 };
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222 }