Mercurial > hg > orthanc-databases
annotate Framework/PostgreSQL/PostgreSQLStatement.cpp @ 214:ab96698c73a3
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 | 3236894320d6 |
| children | d1b124d116c1 |
| 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) 2017-2021 Osimis S.A., Belgium |
| 0 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU Affero General Public License | |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 11 * | |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 **/ | |
| 20 | |
| 21 | |
|
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22 #include "PostgreSQLIncludes.h" // Must be the first |
| 105 | 23 #include "PostgreSQLStatement.h" |
| 0 | 24 |
| 25 #include "../Common/BinaryStringValue.h" | |
| 26 #include "../Common/FileValue.h" | |
| 27 #include "../Common/Integer64Value.h" | |
| 28 #include "../Common/NullValue.h" | |
| 29 #include "../Common/ResultBase.h" | |
| 30 #include "../Common/Utf8StringValue.h" | |
| 31 #include "PostgreSQLResult.h" | |
| 32 | |
|
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33 #include <Compatibility.h> // For std::unique_ptr<> |
| 152 | 34 #include <Logging.h> |
| 35 #include <OrthancException.h> | |
| 36 #include <Toolbox.h> | |
| 37 #include <Endianness.h> | |
| 0 | 38 |
| 39 #include <cassert> | |
| 40 | |
| 41 | |
| 42 namespace OrthancDatabases | |
| 43 { | |
| 44 class PostgreSQLStatement::Inputs : public boost::noncopyable | |
| 45 { | |
| 46 private: | |
| 47 std::vector<char*> values_; | |
| 48 std::vector<int> sizes_; | |
| 49 | |
| 50 static char* Allocate(const void* source, int size) | |
| 51 { | |
| 52 if (size == 0) | |
| 53 { | |
| 54 return NULL; | |
| 55 } | |
| 56 else | |
| 57 { | |
| 58 char* ptr = reinterpret_cast<char*>(malloc(size)); | |
| 59 | |
| 60 if (source != NULL) | |
| 61 { | |
| 62 memcpy(ptr, source, size); | |
| 63 } | |
| 64 | |
| 65 return ptr; | |
| 66 } | |
| 67 } | |
| 68 | |
| 69 void Resize(size_t size) | |
| 70 { | |
| 71 // Shrinking of the vector | |
| 72 for (size_t i = size; i < values_.size(); i++) | |
| 73 { | |
| 74 if (values_[i] != NULL) | |
| 75 free(values_[i]); | |
| 76 } | |
| 77 | |
| 78 values_.resize(size, NULL); | |
| 79 sizes_.resize(size, 0); | |
| 80 } | |
| 81 | |
| 82 void EnlargeForIndex(size_t index) | |
| 83 { | |
| 84 if (index >= values_.size()) | |
| 85 { | |
| 86 // The vector is too small | |
| 87 Resize(index + 1); | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 public: | |
| 92 Inputs() | |
| 93 { | |
| 94 } | |
| 95 | |
| 96 ~Inputs() | |
| 97 { | |
| 98 Resize(0); | |
| 99 } | |
| 100 | |
| 101 void SetItem(size_t pos, const void* source, int size) | |
| 102 { | |
| 103 EnlargeForIndex(pos); | |
| 104 | |
| 105 if (sizes_[pos] == size) | |
| 106 { | |
| 107 if (source && size != 0) | |
| 108 { | |
| 109 memcpy(values_[pos], source, size); | |
| 110 } | |
| 111 } | |
| 112 else | |
| 113 { | |
| 114 if (values_[pos] != NULL) | |
| 115 { | |
| 116 free(values_[pos]); | |
| 117 } | |
| 118 | |
| 119 values_[pos] = Allocate(source, size); | |
| 120 sizes_[pos] = size; | |
| 121 } | |
| 122 } | |
| 123 | |
| 124 void SetItem(size_t pos, int size) | |
| 125 { | |
| 126 SetItem(pos, NULL, size); | |
| 127 } | |
| 128 | |
| 129 void* GetItem(size_t pos) const | |
| 130 { | |
| 131 if (pos >= values_.size()) | |
| 132 { | |
| 133 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 134 } | |
| 135 | |
| 136 return values_[pos]; | |
| 137 } | |
| 138 | |
| 139 const std::vector<char*>& GetValues() const | |
| 140 { | |
| 141 return values_; | |
| 142 } | |
| 143 | |
| 144 const std::vector<int>& GetSizes() const | |
| 145 { | |
| 146 return sizes_; | |
| 147 } | |
| 148 }; | |
| 149 | |
| 150 | |
| 151 void PostgreSQLStatement::Prepare() | |
| 152 { | |
| 153 if (id_.size() > 0) | |
| 154 { | |
| 155 // Already prepared | |
| 156 return; | |
| 157 } | |
| 158 | |
| 159 for (size_t i = 0; i < oids_.size(); i++) | |
| 160 { | |
| 161 if (oids_[i] == 0) | |
| 162 { | |
| 163 // The type of an input parameter was not set | |
| 164 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 165 } | |
| 166 } | |
| 167 | |
| 168 id_ = Orthanc::Toolbox::GenerateUuid(); | |
| 169 | |
| 170 const unsigned int* tmp = oids_.size() ? &oids_[0] : NULL; | |
| 171 | |
| 172 PGresult* result = PQprepare(reinterpret_cast<PGconn*>(database_.pg_), | |
| 173 id_.c_str(), sql_.c_str(), oids_.size(), tmp); | |
| 174 | |
| 175 if (result == NULL) | |
| 176 { | |
| 177 id_.clear(); | |
| 178 database_.ThrowException(true); | |
| 179 } | |
| 180 | |
| 181 bool ok = (PQresultStatus(result) == PGRES_COMMAND_OK); | |
| 182 if (ok) | |
| 183 { | |
| 184 PQclear(result); | |
| 185 } | |
| 186 else | |
| 187 { | |
| 188 std::string message = PQresultErrorMessage(result); | |
| 189 PQclear(result); | |
| 190 id_.clear(); | |
| 191 LOG(ERROR) << "PostgreSQL error: " << message; | |
| 192 database_.ThrowException(false); | |
| 193 } | |
| 194 } | |
| 195 | |
| 196 | |
| 197 void PostgreSQLStatement::Unprepare() | |
| 198 { | |
| 199 if (id_.size() > 0) | |
| 200 { | |
| 201 // "Although there is no libpq function for deleting a | |
| 202 // prepared statement, the SQL DEALLOCATE statement can be | |
| 203 // used for that purpose." | |
|
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204 database_.Execute("DEALLOCATE \"" + id_ + "\""); |
| 0 | 205 } |
| 206 | |
| 207 id_.clear(); | |
| 208 } | |
| 209 | |
| 210 | |
| 211 void PostgreSQLStatement::DeclareInputInternal(unsigned int param, | |
| 212 unsigned int /*Oid*/ type) | |
| 213 { | |
| 214 Unprepare(); | |
| 215 | |
| 216 if (oids_.size() <= param) | |
| 217 { | |
| 218 oids_.resize(param + 1, 0); | |
| 219 binary_.resize(param + 1); | |
| 220 } | |
| 221 | |
| 222 oids_[param] = type; | |
| 223 binary_[param] = (type == TEXTOID || type == BYTEAOID || type == OIDOID) ? 0 : 1; | |
| 224 } | |
| 225 | |
| 226 | |
| 227 void PostgreSQLStatement::DeclareInputInteger(unsigned int param) | |
| 228 { | |
| 229 DeclareInputInternal(param, INT4OID); | |
| 230 } | |
| 231 | |
| 232 | |
| 233 void PostgreSQLStatement::DeclareInputInteger64(unsigned int param) | |
| 234 { | |
| 235 DeclareInputInternal(param, INT8OID); | |
| 236 } | |
| 237 | |
| 238 | |
| 239 void PostgreSQLStatement::DeclareInputString(unsigned int param) | |
| 240 { | |
| 241 DeclareInputInternal(param, TEXTOID); | |
| 242 } | |
| 243 | |
| 244 | |
| 245 void PostgreSQLStatement::DeclareInputBinary(unsigned int param) | |
| 246 { | |
| 247 DeclareInputInternal(param, BYTEAOID); | |
| 248 } | |
| 249 | |
| 250 | |
| 251 void PostgreSQLStatement::DeclareInputLargeObject(unsigned int param) | |
| 252 { | |
| 253 DeclareInputInternal(param, OIDOID); | |
| 254 } | |
| 255 | |
| 256 | |
| 257 void* /* PGresult* */ PostgreSQLStatement::Execute() | |
| 258 { | |
| 259 Prepare(); | |
| 260 | |
| 261 PGresult* result; | |
| 262 | |
| 263 if (oids_.size() == 0) | |
| 264 { | |
| 265 // No parameter | |
| 266 result = PQexecPrepared(reinterpret_cast<PGconn*>(database_.pg_), | |
| 267 id_.c_str(), 0, NULL, NULL, NULL, 1); | |
| 268 } | |
| 269 else | |
| 270 { | |
| 271 // At least 1 parameter | |
| 272 result = PQexecPrepared(reinterpret_cast<PGconn*>(database_.pg_), | |
| 273 id_.c_str(), | |
| 274 oids_.size(), | |
| 275 &inputs_->GetValues()[0], | |
| 276 &inputs_->GetSizes()[0], | |
| 277 &binary_[0], | |
| 278 1); | |
| 279 } | |
| 280 | |
| 281 if (result == NULL) | |
| 282 { | |
| 283 database_.ThrowException(true); | |
| 284 } | |
| 285 | |
| 286 return result; | |
| 287 } | |
| 288 | |
| 289 | |
| 290 PostgreSQLStatement::PostgreSQLStatement(PostgreSQLDatabase& database, | |
|
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291 const std::string& sql) : |
| 0 | 292 database_(database), |
| 293 sql_(sql), | |
| 294 inputs_(new Inputs), | |
| 295 formatter_(Dialect_PostgreSQL) | |
| 296 { | |
| 297 LOG(TRACE) << "PostgreSQL: " << sql; | |
| 298 } | |
| 299 | |
| 300 | |
| 301 PostgreSQLStatement::PostgreSQLStatement(PostgreSQLDatabase& database, | |
| 302 const Query& query) : | |
| 303 database_(database), | |
| 304 inputs_(new Inputs), | |
| 305 formatter_(Dialect_PostgreSQL) | |
| 306 { | |
| 307 query.Format(sql_, formatter_); | |
| 308 LOG(TRACE) << "PostgreSQL: " << sql_; | |
| 309 | |
| 310 for (size_t i = 0; i < formatter_.GetParametersCount(); i++) | |
| 311 { | |
| 312 switch (formatter_.GetParameterType(i)) | |
| 313 { | |
| 314 case ValueType_Integer64: | |
| 315 DeclareInputInteger64(i); | |
| 316 break; | |
| 317 | |
| 318 case ValueType_Utf8String: | |
| 319 DeclareInputString(i); | |
| 320 break; | |
| 321 | |
| 322 case ValueType_BinaryString: | |
| 323 DeclareInputBinary(i); | |
| 324 break; | |
| 325 | |
| 326 case ValueType_File: | |
| 327 DeclareInputLargeObject(i); | |
| 328 break; | |
| 329 | |
| 330 case ValueType_Null: | |
| 331 default: | |
| 332 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
| 333 } | |
| 334 } | |
| 335 } | |
| 336 | |
| 337 | |
|
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338 PostgreSQLStatement::~PostgreSQLStatement() |
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339 { |
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340 try |
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341 { |
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342 Unprepare(); |
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343 } |
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344 catch (Orthanc::OrthancException&) |
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345 { |
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346 // Ignore possible exceptions due to connection loss |
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347 } |
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348 } |
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349 |
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350 |
| 0 | 351 void PostgreSQLStatement::Run() |
| 352 { | |
| 353 PGresult* result = reinterpret_cast<PGresult*>(Execute()); | |
| 354 assert(result != NULL); // An exception would have been thrown otherwise | |
| 355 | |
| 356 bool ok = (PQresultStatus(result) == PGRES_COMMAND_OK || | |
| 357 PQresultStatus(result) == PGRES_TUPLES_OK); | |
| 358 if (ok) | |
| 359 { | |
| 360 PQclear(result); | |
| 361 } | |
| 362 else | |
| 363 { | |
| 364 std::string error = PQresultErrorMessage(result); | |
| 365 PQclear(result); | |
| 366 LOG(ERROR) << "PostgreSQL error: " << error; | |
| 367 database_.ThrowException(false); | |
| 368 } | |
| 369 } | |
| 370 | |
| 371 | |
| 372 void PostgreSQLStatement::BindNull(unsigned int param) | |
| 373 { | |
| 374 if (param >= oids_.size()) | |
| 375 { | |
| 376 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 377 } | |
| 378 | |
| 379 inputs_->SetItem(param, 0); | |
| 380 } | |
| 381 | |
| 382 | |
| 383 void PostgreSQLStatement::BindInteger(unsigned int param, | |
| 384 int value) | |
| 385 { | |
| 386 if (param >= oids_.size()) | |
| 387 { | |
| 388 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 389 } | |
| 390 | |
| 391 if (oids_[param] != INT4OID) | |
| 392 { | |
| 393 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType); | |
| 394 } | |
| 395 | |
| 396 assert(sizeof(int32_t) == 4); | |
| 397 int32_t v = htobe32(static_cast<int32_t>(value)); | |
| 398 inputs_->SetItem(param, &v, sizeof(int32_t)); | |
| 399 } | |
| 400 | |
| 401 | |
| 402 void PostgreSQLStatement::BindInteger64(unsigned int param, | |
| 403 int64_t value) | |
| 404 { | |
| 405 if (param >= oids_.size()) | |
| 406 { | |
| 407 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 408 } | |
| 409 | |
| 410 if (oids_[param] != INT8OID) | |
| 411 { | |
| 412 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType); | |
| 413 } | |
| 414 | |
| 415 assert(sizeof(int64_t) == 8); | |
| 416 int64_t v = htobe64(value); | |
| 417 inputs_->SetItem(param, &v, sizeof(int64_t)); | |
| 418 } | |
| 419 | |
| 420 | |
| 421 void PostgreSQLStatement::BindString(unsigned int param, | |
| 422 const std::string& value) | |
| 423 { | |
| 424 if (param >= oids_.size()) | |
| 425 { | |
| 426 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 427 } | |
| 428 | |
| 429 if (oids_[param] != TEXTOID && oids_[param] != BYTEAOID) | |
| 430 { | |
| 431 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType); | |
| 432 } | |
| 433 | |
| 434 if (value.size() == 0) | |
| 435 { | |
| 436 inputs_->SetItem(param, "", 1 /* end-of-string character */); | |
| 437 } | |
| 438 else | |
| 439 { | |
| 440 inputs_->SetItem(param, value.c_str(), | |
| 441 value.size() + 1); // "+1" for end-of-string character | |
| 442 } | |
| 443 } | |
| 444 | |
| 445 | |
| 446 void PostgreSQLStatement::BindLargeObject(unsigned int param, | |
| 447 const PostgreSQLLargeObject& value) | |
| 448 { | |
| 449 if (param >= oids_.size()) | |
| 450 { | |
| 451 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 452 } | |
| 453 | |
| 454 if (oids_[param] != OIDOID) | |
| 455 { | |
| 456 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType); | |
| 457 } | |
| 458 | |
| 459 inputs_->SetItem(param, value.GetOid().c_str(), | |
| 460 value.GetOid().size() + 1); // "+1" for end-of-string character | |
| 461 } | |
| 462 | |
| 463 | |
| 464 class PostgreSQLStatement::ResultWrapper : public ResultBase | |
| 465 { | |
| 466 private: | |
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467 std::unique_ptr<PostgreSQLResult> result_; |
| 0 | 468 |
| 469 protected: | |
| 470 virtual IValue* FetchField(size_t index) | |
| 471 { | |
| 472 return result_->GetValue(index); | |
| 473 } | |
| 474 | |
| 475 public: | |
| 186 | 476 explicit ResultWrapper(PostgreSQLStatement& statement) : |
| 0 | 477 result_(new PostgreSQLResult(statement)) |
| 478 { | |
| 479 SetFieldsCount(result_->GetColumnsCount()); | |
| 480 FetchFields(); | |
| 481 } | |
| 482 | |
| 483 virtual void Next() | |
| 484 { | |
| 485 result_->Next(); | |
| 486 FetchFields(); | |
| 487 } | |
| 488 | |
| 489 virtual bool IsDone() const | |
| 490 { | |
| 491 return result_->IsDone(); | |
| 492 } | |
| 493 }; | |
| 494 | |
| 495 | |
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496 IResult* PostgreSQLStatement::Execute(ITransaction& transaction, |
| 0 | 497 const Dictionary& parameters) |
| 498 { | |
| 499 for (size_t i = 0; i < formatter_.GetParametersCount(); i++) | |
| 500 { | |
| 501 const std::string& name = formatter_.GetParameterName(i); | |
| 502 | |
| 503 switch (formatter_.GetParameterType(i)) | |
| 504 { | |
| 505 case ValueType_Integer64: | |
| 506 BindInteger64(i, dynamic_cast<const Integer64Value&>(parameters.GetValue(name)).GetValue()); | |
| 507 break; | |
| 508 | |
| 509 case ValueType_Null: | |
| 510 BindNull(i); | |
| 511 break; | |
| 512 | |
| 513 case ValueType_Utf8String: | |
| 514 BindString(i, dynamic_cast<const Utf8StringValue&> | |
| 515 (parameters.GetValue(name)).GetContent()); | |
| 516 break; | |
| 517 | |
| 518 case ValueType_BinaryString: | |
| 519 BindString(i, dynamic_cast<const BinaryStringValue&> | |
| 520 (parameters.GetValue(name)).GetContent()); | |
| 521 break; | |
| 522 | |
| 523 case ValueType_File: | |
| 524 { | |
| 525 const FileValue& blob = | |
| 526 dynamic_cast<const FileValue&>(parameters.GetValue(name)); | |
| 527 | |
| 528 PostgreSQLLargeObject largeObject(database_, blob.GetContent()); | |
| 529 BindLargeObject(i, largeObject); | |
| 530 break; | |
| 531 } | |
| 532 | |
| 533 default: | |
| 534 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 535 } | |
| 536 } | |
| 537 | |
| 538 return new ResultWrapper(*this); | |
| 539 } | |
| 540 | |
| 541 | |
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542 void PostgreSQLStatement::ExecuteWithoutResult(ITransaction& transaction, |
| 0 | 543 const Dictionary& parameters) |
| 544 { | |
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545 std::unique_ptr<IResult> dummy(Execute(transaction, parameters)); |
| 0 | 546 } |
| 547 } |