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annotate Framework/Common/DatabaseManager.h @ 237:35598014f140

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refactoring to remove GlobalProperties.cpp
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 08 Apr 2021 19:09:04 +0200
parents 0a9b48d19643
children a063bbf10a3e
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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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3236894320d6 upgrade to year 2021
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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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20
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21
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22 #pragma once
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24 #include "IDatabase.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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29
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30 #include <memory>
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31
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32
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33 namespace OrthancDatabases
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34 {
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35 /**
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36 * WARNING: In PostgreSQL releases <= 3.3 and in MySQL releases <=
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37 * 3.0, this class was protected by a mutex. It is now assumed that
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38 * locking must be implemented at a higher level.
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39 *
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40 * This class maintains a list of precompiled statements. At any
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41 * time, this class handles 0 or 1 active transaction.
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42 **/
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43 class DatabaseManager : public boost::noncopyable
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44 {
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45 private:
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46 typedef std::map<StatementLocation, IPrecompiledStatement*> CachedStatements;
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47
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48 std::unique_ptr<IDatabase> database_;
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49 std::unique_ptr<ITransaction> transaction_;
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50 CachedStatements cachedStatements_;
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51 Dialect dialect_;
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52
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53 void CloseIfUnavailable(Orthanc::ErrorCode e);
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54
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55 IPrecompiledStatement* LookupCachedStatement(const StatementLocation& location) const;
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56
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57 IPrecompiledStatement& CacheStatement(const StatementLocation& location,
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58 const Query& query);
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59
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60 ITransaction& GetTransaction();
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61
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62 void ReleaseImplicitTransaction();
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63
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64 public:
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65 explicit DatabaseManager(IDatabase* database); // Takes ownership
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66
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67 ~DatabaseManager()
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68 {
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69 Close();
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70 }
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71
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72 IDatabase& GetDatabase()
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73 {
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74 return *database_;
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75 }
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76
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77 Dialect GetDialect() const
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78 {
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79 return dialect_;
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80 }
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81
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82 void Close();
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83
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84 void StartTransaction(TransactionType type);
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85
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86 void CommitTransaction();
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87
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88 void RollbackTransaction();
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89
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91 // This class is only used in the "StorageBackend"
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92 class Transaction : public boost::noncopyable
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93 {
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94 private:
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95 DatabaseManager& manager_;
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96 IDatabase& database_;
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97 bool committed_;
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98
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99 public:
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100 explicit Transaction(DatabaseManager& manager,
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101 TransactionType type);
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102
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103 ~Transaction();
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104
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105 void Commit();
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106
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107 DatabaseManager& GetManager()
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108 {
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109 return manager_;
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110 }
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111
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112 IDatabase& GetDatabase()
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113 {
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114 return database_;
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115 }
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116
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117 bool DoesTableExist(const std::string& name)
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118 {
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119 return manager_.GetTransaction().DoesTableExist(name);
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120 }
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121
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122 bool DoesTriggerExist(const std::string& name)
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123 {
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124 return manager_.GetTransaction().DoesTriggerExist(name);
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125 }
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126
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127 void ExecuteMultiLines(const std::string& sql)
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128 {
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129 manager_.GetTransaction().ExecuteMultiLines(sql);
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130 }
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131 };
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133
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134 class StatementBase : public boost::noncopyable
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135 {
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136 private:
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137 DatabaseManager& manager_;
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138 ITransaction& transaction_;
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139 std::unique_ptr<Query> query_;
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140 std::unique_ptr<IResult> result_;
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141
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142 IResult& GetResult() const;
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143
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144 protected:
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145 DatabaseManager& GetManager() const
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146 {
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147 return manager_;
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148 }
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149
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150 ITransaction& GetTransaction() const
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151 {
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152 return transaction_;
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153 }
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154
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155 void SetQuery(Query* query);
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156
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157 void SetResult(IResult* result);
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158
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159 void ClearResult()
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160 {
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161 result_.reset();
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162 }
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163
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164 Query* ReleaseQuery()
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165 {
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166 return query_.release();
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167 }
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168
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169 public:
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170 explicit StatementBase(DatabaseManager& manager);
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171
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172 virtual ~StatementBase();
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173
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174 // Used only by SQLite
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175 IDatabase& GetDatabase()
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176 {
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177 return manager_.GetDatabase();
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178 }
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179
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180 void SetReadOnly(bool readOnly);
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181
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182 void SetParameterType(const std::string& parameter,
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183 ValueType type);
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184
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185 bool IsDone() const;
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186
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187 void Next();
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188
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189 size_t GetResultFieldsCount() const;
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190
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191 void SetResultFieldType(size_t field,
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192 ValueType type);
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193
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194 const IValue& GetResultField(size_t index) const;
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195 };
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196
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197
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198 class CachedStatement : public StatementBase
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199 {
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200 private:
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201 StatementLocation location_;
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202 IPrecompiledStatement* statement_;
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203
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204 public:
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205 CachedStatement(const StatementLocation& location,
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206 DatabaseManager& manager,
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207 const std::string& sql);
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208
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209 void Execute()
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210 {
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211 Dictionary parameters;
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212 Execute(parameters);
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213 }
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214
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215 void Execute(const Dictionary& parameters);
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216 };
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217
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218
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219 class StandaloneStatement : public StatementBase
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220 {
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221 private:
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222 std::unique_ptr<IPrecompiledStatement> statement_;
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223
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224 public:
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225 StandaloneStatement(DatabaseManager& manager,
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226 const std::string& sql);
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227
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228 virtual ~StandaloneStatement();
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229
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230 void Execute()
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231 {
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232 Dictionary parameters;
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233 Execute(parameters);
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234 }
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235
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236 void Execute(const Dictionary& parameters);
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237 };
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238 };
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239 }