Mercurial > hg > orthanc-databases
annotate Framework/PostgreSQL/PostgreSQLStatement.cpp @ 359:16aac0287485
copyright upgraded to 2022
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Mon, 21 Feb 2022 09:32:46 +0100 |
| parents | 02cd7254c949 |
| children | 3d6886f3e5b3 |
| 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) 2017-2022 Osimis S.A., Belgium |
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6 * Copyright (C) 2021-2022 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 "PostgreSQLStatement.h" |
| 0 | 25 |
| 26 #include "../Common/BinaryStringValue.h" | |
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27 #include "../Common/InputFileValue.h" |
| 0 | 28 #include "../Common/Integer64Value.h" |
| 29 #include "../Common/NullValue.h" | |
| 30 #include "../Common/ResultBase.h" | |
| 31 #include "../Common/Utf8StringValue.h" | |
| 32 #include "PostgreSQLResult.h" | |
| 33 | |
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34 #include <Compatibility.h> // For std::unique_ptr<> |
| 152 | 35 #include <Logging.h> |
| 36 #include <OrthancException.h> | |
| 37 #include <Toolbox.h> | |
| 38 #include <Endianness.h> | |
| 0 | 39 |
| 40 #include <cassert> | |
| 41 | |
| 42 | |
| 43 namespace OrthancDatabases | |
| 44 { | |
| 45 class PostgreSQLStatement::Inputs : public boost::noncopyable | |
| 46 { | |
| 47 private: | |
| 48 std::vector<char*> values_; | |
| 49 std::vector<int> sizes_; | |
| 50 | |
| 51 static char* Allocate(const void* source, int size) | |
| 52 { | |
| 53 if (size == 0) | |
| 54 { | |
| 55 return NULL; | |
| 56 } | |
| 57 else | |
| 58 { | |
| 59 char* ptr = reinterpret_cast<char*>(malloc(size)); | |
| 60 | |
| 61 if (source != NULL) | |
| 62 { | |
| 63 memcpy(ptr, source, size); | |
| 64 } | |
| 65 | |
| 66 return ptr; | |
| 67 } | |
| 68 } | |
| 69 | |
| 70 void Resize(size_t size) | |
| 71 { | |
| 72 // Shrinking of the vector | |
| 73 for (size_t i = size; i < values_.size(); i++) | |
| 74 { | |
| 75 if (values_[i] != NULL) | |
| 76 free(values_[i]); | |
| 77 } | |
| 78 | |
| 79 values_.resize(size, NULL); | |
| 80 sizes_.resize(size, 0); | |
| 81 } | |
| 82 | |
| 83 void EnlargeForIndex(size_t index) | |
| 84 { | |
| 85 if (index >= values_.size()) | |
| 86 { | |
| 87 // The vector is too small | |
| 88 Resize(index + 1); | |
| 89 } | |
| 90 } | |
| 91 | |
| 92 public: | |
| 93 Inputs() | |
| 94 { | |
| 95 } | |
| 96 | |
| 97 ~Inputs() | |
| 98 { | |
| 99 Resize(0); | |
| 100 } | |
| 101 | |
| 102 void SetItem(size_t pos, const void* source, int size) | |
| 103 { | |
| 104 EnlargeForIndex(pos); | |
| 105 | |
| 106 if (sizes_[pos] == size) | |
| 107 { | |
| 108 if (source && size != 0) | |
| 109 { | |
| 110 memcpy(values_[pos], source, size); | |
| 111 } | |
| 112 } | |
| 113 else | |
| 114 { | |
| 115 if (values_[pos] != NULL) | |
| 116 { | |
| 117 free(values_[pos]); | |
| 118 } | |
| 119 | |
| 120 values_[pos] = Allocate(source, size); | |
| 121 sizes_[pos] = size; | |
| 122 } | |
| 123 } | |
| 124 | |
| 125 void SetItem(size_t pos, int size) | |
| 126 { | |
| 127 SetItem(pos, NULL, size); | |
| 128 } | |
| 129 | |
| 130 void* GetItem(size_t pos) const | |
| 131 { | |
| 132 if (pos >= values_.size()) | |
| 133 { | |
| 134 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 135 } | |
| 136 | |
| 137 return values_[pos]; | |
| 138 } | |
| 139 | |
| 140 const std::vector<char*>& GetValues() const | |
| 141 { | |
| 142 return values_; | |
| 143 } | |
| 144 | |
| 145 const std::vector<int>& GetSizes() const | |
| 146 { | |
| 147 return sizes_; | |
| 148 } | |
| 149 }; | |
| 150 | |
| 151 | |
| 152 void PostgreSQLStatement::Prepare() | |
| 153 { | |
| 154 if (id_.size() > 0) | |
| 155 { | |
| 156 // Already prepared | |
| 157 return; | |
| 158 } | |
| 159 | |
| 160 for (size_t i = 0; i < oids_.size(); i++) | |
| 161 { | |
| 162 if (oids_[i] == 0) | |
| 163 { | |
| 164 // The type of an input parameter was not set | |
| 165 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 166 } | |
| 167 } | |
| 168 | |
| 169 id_ = Orthanc::Toolbox::GenerateUuid(); | |
| 170 | |
| 171 const unsigned int* tmp = oids_.size() ? &oids_[0] : NULL; | |
| 172 | |
| 173 PGresult* result = PQprepare(reinterpret_cast<PGconn*>(database_.pg_), | |
| 174 id_.c_str(), sql_.c_str(), oids_.size(), tmp); | |
| 175 | |
| 176 if (result == NULL) | |
| 177 { | |
| 178 id_.clear(); | |
| 179 database_.ThrowException(true); | |
| 180 } | |
| 181 | |
| 182 bool ok = (PQresultStatus(result) == PGRES_COMMAND_OK); | |
| 183 if (ok) | |
| 184 { | |
| 185 PQclear(result); | |
| 186 } | |
| 187 else | |
| 188 { | |
| 189 std::string message = PQresultErrorMessage(result); | |
| 190 PQclear(result); | |
| 191 id_.clear(); | |
| 192 LOG(ERROR) << "PostgreSQL error: " << message; | |
| 193 database_.ThrowException(false); | |
| 194 } | |
| 195 } | |
| 196 | |
| 197 | |
| 198 void PostgreSQLStatement::Unprepare() | |
| 199 { | |
| 200 if (id_.size() > 0) | |
| 201 { | |
| 202 // "Although there is no libpq function for deleting a | |
| 203 // prepared statement, the SQL DEALLOCATE statement can be | |
| 204 // used for that purpose." | |
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205 database_.ExecuteMultiLines("DEALLOCATE \"" + id_ + "\""); |
| 0 | 206 } |
| 207 | |
| 208 id_.clear(); | |
| 209 } | |
| 210 | |
| 211 | |
| 212 void PostgreSQLStatement::DeclareInputInternal(unsigned int param, | |
| 213 unsigned int /*Oid*/ type) | |
| 214 { | |
| 215 Unprepare(); | |
| 216 | |
| 217 if (oids_.size() <= param) | |
| 218 { | |
| 219 oids_.resize(param + 1, 0); | |
| 220 binary_.resize(param + 1); | |
| 221 } | |
| 222 | |
| 223 oids_[param] = type; | |
| 224 binary_[param] = (type == TEXTOID || type == BYTEAOID || type == OIDOID) ? 0 : 1; | |
| 225 } | |
| 226 | |
| 227 | |
| 228 void PostgreSQLStatement::DeclareInputInteger(unsigned int param) | |
| 229 { | |
| 230 DeclareInputInternal(param, INT4OID); | |
| 231 } | |
| 232 | |
| 233 | |
| 234 void PostgreSQLStatement::DeclareInputInteger64(unsigned int param) | |
| 235 { | |
| 236 DeclareInputInternal(param, INT8OID); | |
| 237 } | |
| 238 | |
| 239 | |
| 240 void PostgreSQLStatement::DeclareInputString(unsigned int param) | |
| 241 { | |
| 242 DeclareInputInternal(param, TEXTOID); | |
| 243 } | |
| 244 | |
| 245 | |
| 246 void PostgreSQLStatement::DeclareInputBinary(unsigned int param) | |
| 247 { | |
| 248 DeclareInputInternal(param, BYTEAOID); | |
| 249 } | |
| 250 | |
| 251 | |
| 252 void PostgreSQLStatement::DeclareInputLargeObject(unsigned int param) | |
| 253 { | |
| 254 DeclareInputInternal(param, OIDOID); | |
| 255 } | |
| 256 | |
| 257 | |
| 258 void* /* PGresult* */ PostgreSQLStatement::Execute() | |
| 259 { | |
| 260 Prepare(); | |
| 261 | |
| 262 PGresult* result; | |
| 263 | |
| 264 if (oids_.size() == 0) | |
| 265 { | |
| 266 // No parameter | |
| 267 result = PQexecPrepared(reinterpret_cast<PGconn*>(database_.pg_), | |
| 268 id_.c_str(), 0, NULL, NULL, NULL, 1); | |
| 269 } | |
| 270 else | |
| 271 { | |
| 272 // At least 1 parameter | |
| 273 result = PQexecPrepared(reinterpret_cast<PGconn*>(database_.pg_), | |
| 274 id_.c_str(), | |
| 275 oids_.size(), | |
| 276 &inputs_->GetValues()[0], | |
| 277 &inputs_->GetSizes()[0], | |
| 278 &binary_[0], | |
| 279 1); | |
| 280 } | |
| 281 | |
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282 if (PQtransactionStatus(reinterpret_cast<PGconn*>(database_.pg_)) == PQTRANS_INERROR) |
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283 { |
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284 if (result != NULL) |
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285 { |
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286 PQclear(result); |
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287 } |
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288 |
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289 #if ORTHANC_PLUGINS_VERSION_IS_ABOVE(1, 9, 2) |
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290 throw Orthanc::OrthancException(Orthanc::ErrorCode_DatabaseCannotSerialize); |
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291 #else |
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292 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database, "Collision between multiple writers"); |
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293 #endif |
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294 } |
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295 else if (result == NULL) |
| 0 | 296 { |
| 297 database_.ThrowException(true); | |
| 298 } | |
| 299 | |
| 300 return result; | |
| 301 } | |
| 302 | |
| 303 | |
| 304 PostgreSQLStatement::PostgreSQLStatement(PostgreSQLDatabase& database, | |
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305 const std::string& sql) : |
| 0 | 306 database_(database), |
| 307 sql_(sql), | |
| 308 inputs_(new Inputs), | |
| 309 formatter_(Dialect_PostgreSQL) | |
| 310 { | |
| 311 LOG(TRACE) << "PostgreSQL: " << sql; | |
| 312 } | |
| 313 | |
| 314 | |
| 315 PostgreSQLStatement::PostgreSQLStatement(PostgreSQLDatabase& database, | |
| 316 const Query& query) : | |
| 317 database_(database), | |
| 318 inputs_(new Inputs), | |
| 319 formatter_(Dialect_PostgreSQL) | |
| 320 { | |
| 321 query.Format(sql_, formatter_); | |
| 322 LOG(TRACE) << "PostgreSQL: " << sql_; | |
| 323 | |
| 324 for (size_t i = 0; i < formatter_.GetParametersCount(); i++) | |
| 325 { | |
| 326 switch (formatter_.GetParameterType(i)) | |
| 327 { | |
| 328 case ValueType_Integer64: | |
| 329 DeclareInputInteger64(i); | |
| 330 break; | |
| 331 | |
| 332 case ValueType_Utf8String: | |
| 333 DeclareInputString(i); | |
| 334 break; | |
| 335 | |
| 336 case ValueType_BinaryString: | |
| 337 DeclareInputBinary(i); | |
| 338 break; | |
| 339 | |
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340 case ValueType_InputFile: |
| 0 | 341 DeclareInputLargeObject(i); |
| 342 break; | |
| 343 | |
| 344 case ValueType_Null: | |
| 345 default: | |
| 346 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
| 347 } | |
| 348 } | |
| 349 } | |
| 350 | |
| 351 | |
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352 PostgreSQLStatement::~PostgreSQLStatement() |
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353 { |
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354 try |
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355 { |
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356 Unprepare(); |
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357 } |
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358 catch (Orthanc::OrthancException&) |
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359 { |
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360 // Ignore possible exceptions due to connection loss |
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361 } |
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362 } |
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363 |
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364 |
| 0 | 365 void PostgreSQLStatement::Run() |
| 366 { | |
| 367 PGresult* result = reinterpret_cast<PGresult*>(Execute()); | |
| 368 assert(result != NULL); // An exception would have been thrown otherwise | |
| 369 | |
| 370 bool ok = (PQresultStatus(result) == PGRES_COMMAND_OK || | |
| 371 PQresultStatus(result) == PGRES_TUPLES_OK); | |
| 372 if (ok) | |
| 373 { | |
| 374 PQclear(result); | |
| 375 } | |
| 376 else | |
| 377 { | |
| 378 std::string error = PQresultErrorMessage(result); | |
| 379 PQclear(result); | |
| 380 LOG(ERROR) << "PostgreSQL error: " << error; | |
| 381 database_.ThrowException(false); | |
| 382 } | |
| 383 } | |
| 384 | |
| 385 | |
| 386 void PostgreSQLStatement::BindNull(unsigned int param) | |
| 387 { | |
| 388 if (param >= oids_.size()) | |
| 389 { | |
| 390 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 391 } | |
| 392 | |
| 393 inputs_->SetItem(param, 0); | |
| 394 } | |
| 395 | |
| 396 | |
| 397 void PostgreSQLStatement::BindInteger(unsigned int param, | |
| 398 int value) | |
| 399 { | |
| 400 if (param >= oids_.size()) | |
| 401 { | |
| 402 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 403 } | |
| 404 | |
| 405 if (oids_[param] != INT4OID) | |
| 406 { | |
| 407 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType); | |
| 408 } | |
| 409 | |
| 410 assert(sizeof(int32_t) == 4); | |
| 411 int32_t v = htobe32(static_cast<int32_t>(value)); | |
| 412 inputs_->SetItem(param, &v, sizeof(int32_t)); | |
| 413 } | |
| 414 | |
| 415 | |
| 416 void PostgreSQLStatement::BindInteger64(unsigned int param, | |
| 417 int64_t value) | |
| 418 { | |
| 419 if (param >= oids_.size()) | |
| 420 { | |
| 421 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 422 } | |
| 423 | |
| 424 if (oids_[param] != INT8OID) | |
| 425 { | |
| 426 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType); | |
| 427 } | |
| 428 | |
| 429 assert(sizeof(int64_t) == 8); | |
| 430 int64_t v = htobe64(value); | |
| 431 inputs_->SetItem(param, &v, sizeof(int64_t)); | |
| 432 } | |
| 433 | |
| 434 | |
| 435 void PostgreSQLStatement::BindString(unsigned int param, | |
| 436 const std::string& value) | |
| 437 { | |
| 438 if (param >= oids_.size()) | |
| 439 { | |
| 440 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 441 } | |
| 442 | |
| 443 if (oids_[param] != TEXTOID && oids_[param] != BYTEAOID) | |
| 444 { | |
| 445 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType); | |
| 446 } | |
| 447 | |
| 448 if (value.size() == 0) | |
| 449 { | |
| 450 inputs_->SetItem(param, "", 1 /* end-of-string character */); | |
| 451 } | |
| 452 else | |
| 453 { | |
| 454 inputs_->SetItem(param, value.c_str(), | |
| 455 value.size() + 1); // "+1" for end-of-string character | |
| 456 } | |
| 457 } | |
| 458 | |
| 459 | |
| 460 void PostgreSQLStatement::BindLargeObject(unsigned int param, | |
| 461 const PostgreSQLLargeObject& value) | |
| 462 { | |
| 463 if (param >= oids_.size()) | |
| 464 { | |
| 465 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 466 } | |
| 467 | |
| 468 if (oids_[param] != OIDOID) | |
| 469 { | |
| 470 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType); | |
| 471 } | |
| 472 | |
| 473 inputs_->SetItem(param, value.GetOid().c_str(), | |
| 474 value.GetOid().size() + 1); // "+1" for end-of-string character | |
| 475 } | |
| 476 | |
| 477 | |
| 478 class PostgreSQLStatement::ResultWrapper : public ResultBase | |
| 479 { | |
| 480 private: | |
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481 std::unique_ptr<PostgreSQLResult> result_; |
| 0 | 482 |
| 483 protected: | |
| 484 virtual IValue* FetchField(size_t index) | |
| 485 { | |
| 486 return result_->GetValue(index); | |
| 487 } | |
| 488 | |
| 489 public: | |
| 186 | 490 explicit ResultWrapper(PostgreSQLStatement& statement) : |
| 0 | 491 result_(new PostgreSQLResult(statement)) |
| 492 { | |
| 493 SetFieldsCount(result_->GetColumnsCount()); | |
| 494 FetchFields(); | |
| 495 } | |
| 496 | |
| 497 virtual void Next() | |
| 498 { | |
| 499 result_->Next(); | |
| 500 FetchFields(); | |
| 501 } | |
| 502 | |
| 503 virtual bool IsDone() const | |
| 504 { | |
| 505 return result_->IsDone(); | |
| 506 } | |
| 507 }; | |
| 508 | |
| 509 | |
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510 IResult* PostgreSQLStatement::Execute(ITransaction& transaction, |
| 0 | 511 const Dictionary& parameters) |
| 512 { | |
| 513 for (size_t i = 0; i < formatter_.GetParametersCount(); i++) | |
| 514 { | |
| 515 const std::string& name = formatter_.GetParameterName(i); | |
| 516 | |
| 517 switch (formatter_.GetParameterType(i)) | |
| 518 { | |
| 519 case ValueType_Integer64: | |
| 520 BindInteger64(i, dynamic_cast<const Integer64Value&>(parameters.GetValue(name)).GetValue()); | |
| 521 break; | |
| 522 | |
| 523 case ValueType_Null: | |
| 524 BindNull(i); | |
| 525 break; | |
| 526 | |
| 527 case ValueType_Utf8String: | |
| 528 BindString(i, dynamic_cast<const Utf8StringValue&> | |
| 529 (parameters.GetValue(name)).GetContent()); | |
| 530 break; | |
| 531 | |
| 532 case ValueType_BinaryString: | |
| 533 BindString(i, dynamic_cast<const BinaryStringValue&> | |
| 534 (parameters.GetValue(name)).GetContent()); | |
| 535 break; | |
| 536 | |
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537 case ValueType_InputFile: |
| 0 | 538 { |
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539 const InputFileValue& blob = |
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540 dynamic_cast<const InputFileValue&>(parameters.GetValue(name)); |
| 0 | 541 |
| 542 PostgreSQLLargeObject largeObject(database_, blob.GetContent()); | |
| 543 BindLargeObject(i, largeObject); | |
| 544 break; | |
| 545 } | |
| 546 | |
| 547 default: | |
| 548 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 549 } | |
| 550 } | |
| 551 | |
| 552 return new ResultWrapper(*this); | |
| 553 } | |
| 554 | |
| 555 | |
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556 void PostgreSQLStatement::ExecuteWithoutResult(ITransaction& transaction, |
| 0 | 557 const Dictionary& parameters) |
| 558 { | |
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559 std::unique_ptr<IResult> dummy(Execute(transaction, parameters)); |
| 0 | 560 } |
| 561 } |