Mercurial > hg > orthanc-databases
annotate Framework/PostgreSQL/PostgreSQLResult.cpp @ 433:5964ce6385a5 pg-transactions
use temporary tables for DeletedFiles, RemainingAncestor and DeletedResources
| author | Alain Mazy <am@osimis.io> |
|---|---|
| date | Wed, 13 Dec 2023 15:48:56 +0100 |
| parents | dbf811b1bb43 |
| children | 326f8304daa1 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
|
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5 * Copyright (C) 2017-2023 Osimis S.A., Belgium |
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6 * Copyright (C) 2021-2023 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
| 0 | 7 * |
| 8 * This program is free software: you can redistribute it and/or | |
| 9 * modify it under the terms of the GNU Affero General Public License | |
| 10 * as published by the Free Software Foundation, either version 3 of | |
| 11 * the License, or (at your option) any later version. | |
| 12 * | |
| 13 * This program is distributed in the hope that it will be useful, but | |
| 14 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 16 * Affero General Public License for more details. | |
| 17 * | |
| 18 * You should have received a copy of the GNU Affero General Public License | |
| 19 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 20 **/ | |
| 21 | |
| 22 | |
|
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23 #include "PostgreSQLIncludes.h" // Must be the first |
| 105 | 24 #include "PostgreSQLResult.h" |
| 0 | 25 |
| 26 #include "../Common/BinaryStringValue.h" | |
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27 #include "../Common/ResultFileValue.h" |
| 0 | 28 #include "../Common/Integer64Value.h" |
| 29 #include "../Common/NullValue.h" | |
| 30 #include "../Common/Utf8StringValue.h" | |
| 31 | |
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32 #include <Compatibility.h> // For std::unique_ptr<> |
| 152 | 33 #include <OrthancException.h> |
| 34 #include <Logging.h> | |
| 35 #include <Endianness.h> | |
| 0 | 36 |
| 37 #include <cassert> | |
| 38 #include <boost/lexical_cast.hpp> | |
| 39 | |
| 40 | |
| 41 namespace OrthancDatabases | |
| 42 { | |
| 43 void PostgreSQLResult::Clear() | |
| 44 { | |
| 45 if (result_ != NULL) | |
| 46 { | |
| 47 PQclear(reinterpret_cast<PGresult*>(result_)); | |
| 48 result_ = NULL; | |
| 49 } | |
| 50 } | |
| 51 | |
| 52 | |
| 53 void PostgreSQLResult::CheckDone() | |
| 54 { | |
| 55 if (position_ >= PQntuples(reinterpret_cast<PGresult*>(result_))) | |
| 56 { | |
| 57 // We are at the end of the result set | |
| 58 Clear(); | |
| 59 } | |
| 60 } | |
| 61 | |
| 62 | |
| 63 void PostgreSQLResult::CheckColumn(unsigned int column, unsigned int /*Oid*/ expectedType) const | |
| 64 { | |
| 65 if (IsDone()) | |
| 66 { | |
| 67 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 68 } | |
| 69 | |
| 70 if (column >= static_cast<unsigned int>(PQnfields(reinterpret_cast<PGresult*>(result_)))) | |
| 71 { | |
| 72 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 73 } | |
| 74 | |
| 75 if (expectedType != 0 && | |
| 76 expectedType != PQftype(reinterpret_cast<PGresult*>(result_), column)) | |
| 77 { | |
| 78 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType); | |
| 79 } | |
| 80 } | |
| 81 | |
| 82 | |
| 83 PostgreSQLResult::PostgreSQLResult(PostgreSQLStatement& statement) : | |
| 84 position_(0), | |
| 85 database_(statement.GetDatabase()) | |
| 86 { | |
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87 if (database_.IsVerboseEnabled()) |
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88 { |
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89 LOG(INFO) << "PostgreSQL: " << statement.sql_; |
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90 } |
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91 |
| 0 | 92 result_ = statement.Execute(); |
| 93 assert(result_ != NULL); // An exception would have been thrown otherwise | |
| 94 | |
| 95 // This is the first call to "Next()" | |
| 96 if (PQresultStatus(reinterpret_cast<PGresult*>(result_)) == PGRES_TUPLES_OK) | |
| 97 { | |
| 98 CheckDone(); | |
| 99 columnsCount_ = static_cast<unsigned int>(PQnfields(reinterpret_cast<PGresult*>(result_))); | |
| 100 } | |
| 101 else | |
| 102 { | |
| 103 // This is not a SELECT request, we're done | |
| 104 Clear(); | |
| 105 columnsCount_ = 0; | |
| 106 } | |
| 107 } | |
| 108 | |
| 109 | |
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110 PostgreSQLResult::~PostgreSQLResult() |
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111 { |
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112 try |
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113 { |
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114 Clear(); |
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115 } |
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116 catch (Orthanc::OrthancException&) |
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117 { |
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118 // Ignore possible exceptions due to connection loss |
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119 } |
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120 } |
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121 |
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122 |
| 0 | 123 void PostgreSQLResult::Next() |
| 124 { | |
| 125 position_++; | |
| 126 CheckDone(); | |
| 127 } | |
| 128 | |
| 129 | |
| 130 bool PostgreSQLResult::IsNull(unsigned int column) const | |
| 131 { | |
| 132 CheckColumn(column, 0); | |
| 133 return PQgetisnull(reinterpret_cast<PGresult*>(result_), position_, column) != 0; | |
| 134 } | |
| 135 | |
| 136 | |
| 137 bool PostgreSQLResult::GetBoolean(unsigned int column) const | |
| 138 { | |
| 139 CheckColumn(column, BOOLOID); | |
| 140 assert(PQfsize(reinterpret_cast<PGresult*>(result_), column) == 1); | |
| 141 const uint8_t *v = reinterpret_cast<const uint8_t*> | |
| 142 (PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column)); | |
| 143 return (v[0] != 0); | |
| 144 } | |
| 145 | |
| 146 | |
| 147 int PostgreSQLResult::GetInteger(unsigned int column) const | |
| 148 { | |
| 149 CheckColumn(column, INT4OID); | |
| 150 assert(PQfsize(reinterpret_cast<PGresult*>(result_), column) == 4); | |
| 151 char *v = PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column); | |
| 152 return htobe32(*reinterpret_cast<int32_t*>(v)); | |
| 153 } | |
| 154 | |
| 155 | |
| 156 int64_t PostgreSQLResult::GetInteger64(unsigned int column) const | |
| 157 { | |
| 158 CheckColumn(column, INT8OID); | |
| 159 assert(PQfsize(reinterpret_cast<PGresult*>(result_), column) == 8); | |
| 160 char *v = PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column); | |
| 161 return htobe64(*reinterpret_cast<int64_t*>(v)); | |
| 162 } | |
| 163 | |
| 164 | |
| 165 std::string PostgreSQLResult::GetString(unsigned int column) const | |
| 166 { | |
| 167 CheckColumn(column, 0); | |
| 168 | |
| 169 Oid oid = PQftype(reinterpret_cast<PGresult*>(result_), column); | |
| 170 if (oid != TEXTOID && oid != VARCHAROID && oid != BYTEAOID) | |
| 171 { | |
| 172 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType); | |
| 173 } | |
| 174 | |
| 175 return std::string(PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column)); | |
| 176 } | |
| 177 | |
| 178 | |
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179 std::string PostgreSQLResult::GetLargeObjectOid(unsigned int column) const |
| 0 | 180 { |
| 181 CheckColumn(column, OIDOID); | |
| 182 | |
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183 /** |
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184 * In PostgreSQL, the type "Oid" corresponds to "unsigned int", cf. |
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185 * /usr/include/postgresql/10/server/postgres_ext.h |
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186 **/ |
| 0 | 187 Oid oid; |
| 188 assert(PQfsize(reinterpret_cast<PGresult*>(result_), column) == sizeof(oid)); | |
| 189 | |
| 190 oid = *(const Oid*) PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column); | |
| 191 oid = ntohl(oid); | |
| 192 | |
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193 return boost::lexical_cast<std::string>(oid); |
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194 } |
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195 |
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196 |
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197 void PostgreSQLResult::GetLargeObjectContent(std::string& content, |
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198 unsigned int column) const |
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199 { |
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200 PostgreSQLLargeObject::ReadWhole(content, database_, GetLargeObjectOid(column)); |
| 0 | 201 } |
| 202 | |
| 203 | |
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204 class PostgreSQLResult::LargeObjectResult : public ResultFileValue |
| 0 | 205 { |
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206 private: |
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207 PostgreSQLDatabase& database_; |
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208 std::string oid_; |
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209 |
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210 public: |
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211 LargeObjectResult(PostgreSQLDatabase& database, |
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212 const std::string& oid) : |
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213 database_(database), |
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214 oid_(oid) |
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215 { |
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216 } |
| 0 | 217 |
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218 virtual void ReadWhole(std::string& target) const ORTHANC_OVERRIDE |
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219 { |
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220 PostgreSQLLargeObject::ReadWhole(target, database_, oid_); |
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221 } |
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222 |
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223 virtual void ReadRange(std::string& target, |
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224 uint64_t start, |
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225 size_t length) const ORTHANC_OVERRIDE |
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226 { |
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227 PostgreSQLLargeObject::ReadRange(target, database_, oid_, start, length); |
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228 } |
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229 }; |
| 0 | 230 |
| 231 | |
| 232 IValue* PostgreSQLResult::GetValue(unsigned int column) const | |
| 233 { | |
| 234 if (IsNull(column)) | |
| 235 { | |
| 236 return new NullValue; | |
| 237 } | |
| 238 | |
| 239 Oid type = PQftype(reinterpret_cast<PGresult*>(result_), column); | |
| 240 | |
| 241 switch (type) | |
| 242 { | |
| 243 case BOOLOID: | |
| 244 // Convert Boolean values as integers | |
| 245 return new Integer64Value(GetBoolean(column) ? 1 : 0); | |
| 246 | |
| 247 case INT4OID: | |
| 248 return new Integer64Value(GetInteger(column)); | |
| 249 | |
| 250 case INT8OID: | |
| 251 return new Integer64Value(GetInteger64(column)); | |
| 252 | |
| 253 case TEXTOID: | |
| 254 case VARCHAROID: | |
| 255 return new Utf8StringValue(GetString(column)); | |
| 256 | |
| 257 case BYTEAOID: | |
| 258 return new BinaryStringValue(GetString(column)); | |
| 259 | |
| 260 case OIDOID: | |
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261 return new LargeObjectResult(database_, GetLargeObjectOid(column)); |
| 0 | 262 |
| 263 default: | |
| 264 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
| 265 } | |
| 266 } | |
| 267 } |