GCC Code Coverage Report


Directory: cvmfs/
File: cvmfs/sql_impl.h
Date: 2026-09-13 02:40:16
Exec Total Coverage
Lines: 212 243 87.2%
Branches: 199 424 46.9%

Line Branch Exec Source
1 /**
2 * This file is part of the CernVM file system.
3 */
4
5 #ifndef CVMFS_SQL_IMPL_H_
6 #define CVMFS_SQL_IMPL_H_
7
8 #include <fcntl.h>
9
10 #include <cassert>
11 #include <cerrno>
12 #include <string>
13
14 #include "sql.h"
15 #include "sqlitemem.h"
16 #include "util/logging.h"
17 #include "util/platform.h"
18
19 namespace sqlite {
20
21 template<class DerivedT>
22 6735 Database<DerivedT>::Database(const std::string &filename,
23 const OpenMode open_mode)
24 6735 : database_(filename, this)
25 6735 , read_write_(kOpenReadWrite == open_mode)
26 6735 , schema_version_(0.0f)
27 13470 , schema_revision_(0) { }
28
29
30 template<class DerivedT>
31 3411 DerivedT *Database<DerivedT>::Create(const std::string &filename) {
32
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3411 std::unique_ptr<DerivedT> database(new DerivedT(filename, kOpenReadWrite));
33
34
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3411 if (database.get() == nullptr) {
35 LogCvmfs(kLogSql, kLogDebug, "Failed to create new database object");
36 return NULL;
37 }
38
39 3411 database->set_schema_version(DerivedT::kLatestSchema);
40 3411 database->set_schema_revision(DerivedT::kLatestSchemaRevision);
41
42 3411 const int open_flags = SQLITE_OPEN_NOMUTEX | SQLITE_OPEN_READWRITE
43 | SQLITE_OPEN_CREATE;
44
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3411 if (!database->OpenDatabase(open_flags)) {
45 LogCvmfs(kLogSql, kLogDebug, "Failed to create new database file");
46 return NULL;
47 }
48
49
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3411 if (!database->CreatePropertiesTable()) {
50 database->PrintSqlError("Failed to create common properties table");
51 return NULL;
52 }
53
54
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3411 if (!database->CreateEmptyDatabase()) {
55 database->PrintSqlError("Failed to create empty database");
56 return NULL;
57 }
58
59
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3411 if (!database->PrepareCommonQueries()) {
60 database->PrintSqlError("Failed to initialize properties queries");
61 return NULL;
62 }
63
64
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3411 if (!database->StoreSchemaRevision()) {
65 database->PrintSqlError("Failed to store initial schema revision");
66 return NULL;
67 }
68
69 3411 return database.release();
70 3411 }
71
72
73 template<class DerivedT>
74 3324 DerivedT *Database<DerivedT>::Open(const std::string &filename,
75 const OpenMode open_mode) {
76
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3324 std::unique_ptr<DerivedT> database(new DerivedT(filename, open_mode));
77
78
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3324 if (database.get() == nullptr) {
79 LogCvmfs(kLogSql, kLogDebug,
80 "Failed to open database file '%s' - errno: %d", filename.c_str(),
81 errno);
82 return NULL;
83 }
84
85
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3324 if (!database->Initialize()) {
86 46 return NULL;
87 }
88
89 3278 return database.release();
90 3324 }
91
92
93 template<class DerivedT>
94 3324 bool Database<DerivedT>::Initialize() {
95
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3324 const int flags = (read_write_) ? SQLITE_OPEN_NOMUTEX | SQLITE_OPEN_READWRITE
96 : SQLITE_OPEN_NOMUTEX | SQLITE_OPEN_READONLY;
97
98
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6634 bool const successful = OpenDatabase(flags) && Configure() && FileReadAhead()
99
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6634 && PrepareCommonQueries();
100
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3324 if (!successful) {
101 14 LogCvmfs(kLogSql, kLogDebug, "failed to open database file '%s'",
102 14 filename().c_str());
103 14 return false;
104 }
105
106 3310 ReadSchemaRevision();
107 3310 LogCvmfs(kLogSql, kLogDebug,
108 "opened database with schema version %f "
109 "and revision %u",
110 3310 schema_version_, schema_revision_);
111
112
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3310 if (!static_cast<DerivedT *>(this)->CheckSchemaCompatibility()) {
113 32 LogCvmfs(kLogSql, kLogDebug, "schema version %f not supported (%s)",
114 16 schema_version_, filename().c_str());
115 16 return false;
116 }
117
118 6588 if (read_write_
119
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3294 && !static_cast<DerivedT *>(this)->LiveSchemaUpgradeIfNecessary()) {
120 16 LogCvmfs(kLogSql, kLogDebug, "failed tp upgrade schema revision");
121 16 return false;
122 }
123
124 3278 return true;
125 }
126
127
128 template<class DerivedT>
129 6735 bool Database<DerivedT>::OpenDatabase(const int flags) {
130 // Open database file (depending on the flags read-only or read-write)
131 6735 LogCvmfs(kLogSql, kLogDebug, "opening database file %s", filename().c_str());
132 6735 int const retval = sqlite3_open_v2(filename().c_str(),
133 &database_.sqlite_db,
134 flags | SQLITE_OPEN_EXRESCODE,
135 NULL);
136
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6735 if (retval != SQLITE_OK) {
137 14 LogCvmfs(kLogSql, kLogDebug, "cannot open database file %s (%d - %d)",
138 14 filename().c_str(), retval, errno);
139 14 return false;
140 }
141
142 6721 return true;
143 }
144
145
146 template<class DerivedT>
147 7000 Database<DerivedT>::DatabaseRaiiWrapper::~DatabaseRaiiWrapper() {
148
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7000 if (NULL != sqlite_db) {
149 7000 const bool close_successful = Close();
150
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7000 assert(close_successful);
151 }
152 7000 }
153
154
155 template<class DerivedT>
156 7000 bool Database<DerivedT>::DatabaseRaiiWrapper::Close() {
157
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7000 assert(NULL != sqlite_db);
158
159
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14000 LogCvmfs(kLogSql, kLogDebug, "closing SQLite database '%s' (unlink: %s)",
160 14000 filename().c_str(), (db_file_guard.IsEnabled() ? "yes" : "no"));
161 7000 const int result = sqlite3_close(sqlite_db);
162
163
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7000 if (result != SQLITE_OK) {
164 LogCvmfs(kLogSql, kLogDebug,
165 "failed to close SQLite database '%s' (%d - %s)",
166 filename().c_str(), result, delegate_->GetLastErrorMsg().c_str());
167 return false;
168 }
169
170 7000 sqlite_db = NULL;
171
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7000 if (lookaside_buffer != NULL) {
172 571 SqliteMemoryManager::GetInstance()->ReleaseLookasideBuffer(
173 lookaside_buffer);
174 571 lookaside_buffer = NULL;
175 }
176 7000 return true;
177 }
178
179
180 template<class DerivedT>
181 3310 bool Database<DerivedT>::Configure() {
182 // Read-only databases should store temporary files in memory. This avoids
183 // unexpected open read-write file descriptors in the cache directory like
184 // etilqs_<number>. They also use the optimized memory manager, if it is
185 // available.
186
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3310 if (!read_write_) {
187
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1306 if (SqliteMemoryManager::HasInstance()) {
188 571 database_.lookaside_buffer = SqliteMemoryManager::GetInstance()
189 571 ->AssignLookasideBuffer(sqlite_db());
190 }
191
192
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2612 return Sql(sqlite_db(), "PRAGMA temp_store=2;").Execute()
193
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2612 && Sql(sqlite_db(), "PRAGMA locking_mode=EXCLUSIVE;").Execute();
194 }
195 2004 return true;
196 }
197
198
199 template<class DerivedT>
200 3310 bool Database<DerivedT>::FileReadAhead() {
201 // Read-ahead into file system buffers
202 // TODO(jblomer): mmap, re-readahead
203
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3310 assert(filename().length() > 1);
204 int fd_readahead;
205
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3310 if (filename()[0] != '@') {
206 2739 fd_readahead = open(filename().c_str(), O_RDONLY);
207
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2739 if (fd_readahead < 0) {
208 LogCvmfs(kLogSql, kLogDebug, "failed to open %s for read-ahead (%d)",
209 filename().c_str(), errno);
210 return false;
211 }
212 2739 const ssize_t retval = platform_readahead(fd_readahead);
213 2739 close(fd_readahead);
214
215 // Read-ahead is known to fail on tmpfs with EINVAL
216 // EINVAL = "readahead() cannot be applied to that a file type"
217 // It can also fail with ENOSYS on kernel interfaces that do not implement
218 // readahead(), such as LX-Brand zones on illumos.
219 // Don't consider either a fatal error.
220
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2739 if (retval != 0 && errno != EINVAL && errno != ENOSYS) {
221 LogCvmfs(kLogSql, kLogDebug | kLogSyslogWarn,
222 "failed to read-ahead %s: invalid file descrp. or not open for "
223 "reading (%d)",
224 filename().c_str(), errno);
225 return false;
226 }
227 }
228
229 3310 return true;
230 }
231
232
233 template<class DerivedT>
234 6721 bool Database<DerivedT>::PrepareCommonQueries() {
235 6721 sqlite3 *db = sqlite_db();
236
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6721 begin_transaction_ = std::unique_ptr<Sql>(new Sql(db, "BEGIN;"));
237
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6721 commit_transaction_ = std::unique_ptr<Sql>(new Sql(db, "COMMIT;"));
238
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13442 has_property_ = std::unique_ptr<Sql>(
239
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6721 new Sql(db, "SELECT count(*) FROM properties "
240 "WHERE key = :key;"));
241
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6721 get_property_ = std::unique_ptr<Sql>(new Sql(db,
242 "SELECT value FROM properties "
243 "WHERE key = :key;"));
244
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13442 set_property_ = std::unique_ptr<Sql>(
245
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6721 new Sql(db, "INSERT OR REPLACE INTO properties "
246 "(key, value) VALUES (:key, :value);"));
247 6721 return (begin_transaction_.get() != nullptr
248
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6721 && commit_transaction_.get() != nullptr
249
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6721 && has_property_.get() != nullptr && get_property_.get() != nullptr
250
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13442 && set_property_.get() != nullptr);
251 }
252
253
254 template<class DerivedT>
255 3310 void Database<DerivedT>::ReadSchemaRevision() {
256
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6620 schema_version_ = (this->HasProperty(kSchemaVersionKey))
257
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3310 ? this->GetProperty<double>(kSchemaVersionKey)
258 : 1.0;
259
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6620 schema_revision_ = (this->HasProperty(kSchemaRevisionKey))
260
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3310 ? this->GetProperty<int>(kSchemaRevisionKey)
261 : 0;
262 3310 }
263
264
265 template<class DerivedT>
266 4160 bool Database<DerivedT>::StoreSchemaRevision() {
267
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8320 return this->SetProperty(kSchemaVersionKey, schema_version_)
268
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12480 && this->SetProperty(kSchemaRevisionKey, schema_revision_);
269 }
270
271
272 template<class DerivedT>
273 3756 bool Database<DerivedT>::BeginTransaction() const {
274
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3756 return begin_transaction_->Execute() && begin_transaction_->Reset();
275 }
276
277
278 template<class DerivedT>
279 3446 bool Database<DerivedT>::CommitTransaction() const {
280
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3446 return commit_transaction_->Execute() && commit_transaction_->Reset();
281 }
282
283
284 template<class DerivedT>
285 3411 bool Database<DerivedT>::CreatePropertiesTable() {
286
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6822 return Sql(sqlite_db(),
287 "CREATE TABLE properties (key TEXT, value TEXT, "
288 "CONSTRAINT pk_properties PRIMARY KEY (key));")
289
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6822 .Execute();
290 }
291
292
293 template<class DerivedT>
294 16291 bool Database<DerivedT>::HasProperty(const std::string &key) const {
295
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16291 assert(has_property_.get() != nullptr);
296 16291 const bool retval = has_property_->BindText(1, key)
297
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16291 && has_property_->FetchRow();
298
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16291 assert(retval);
299 16291 const bool result = has_property_->RetrieveInt64(0) > 0;
300 16291 has_property_->Reset();
301 16291 return result;
302 }
303
304 template<class DerivedT>
305 template<typename T>
306 23414 T Database<DerivedT>::GetProperty(const std::string &key) const {
307
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23414 assert(get_property_.get() != nullptr);
308 23414 const bool retval = get_property_->BindText(1, key)
309
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23414 && get_property_->FetchRow();
310
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23414 assert(retval);
311 23414 const T result = get_property_->Retrieve<T>(0);
312
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23414 get_property_->Reset();
313 23414 return result;
314 }
315
316 template<class DerivedT>
317 template<typename T>
318 9852 T Database<DerivedT>::GetPropertyDefault(const std::string &key,
319 const T default_value) const {
320
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9852 return (HasProperty(key)) ? GetProperty<T>(key) : default_value;
321 }
322
323 template<class DerivedT>
324 template<typename T>
325 36668 bool Database<DerivedT>::SetProperty(const std::string &key, const T value) {
326
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36668 assert(set_property_.get() != nullptr);
327
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73336 return set_property_->BindText(1, key) && set_property_->Bind(2, value)
328
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73336 && set_property_->Execute() && set_property_->Reset();
329 }
330
331 template<class DerivedT>
332 std::string Database<DerivedT>::GetLastErrorMsg() const {
333 std::string msg = sqlite3_errmsg(sqlite_db());
334 return msg;
335 }
336
337
338 template<class DerivedT>
339 1852 void Database<DerivedT>::TakeFileOwnership() {
340 1852 database_.TakeFileOwnership();
341 1852 LogCvmfs(kLogSql, kLogDebug, "Database object took ownership of '%s'",
342 1852 database_.filename().c_str());
343 1852 }
344
345
346 template<class DerivedT>
347 55 void Database<DerivedT>::DropFileOwnership() {
348 55 database_.DropFileOwnership();
349 55 LogCvmfs(kLogSql, kLogDebug, "Database object dropped ownership of '%s'",
350 55 database_.filename().c_str());
351 55 }
352
353
354 template<class DerivedT>
355 176 unsigned Database<DerivedT>::GetModifiedRowCount() const {
356 176 const int modified_rows = sqlite3_total_changes(sqlite_db());
357
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176 assert(modified_rows >= 0);
358 176 return static_cast<unsigned>(modified_rows);
359 }
360
361 /**
362 * Ask SQlite for per-connection memory statistics
363 */
364 template<class DerivedT>
365 7 void Database<DerivedT>::GetMemStatistics(MemStatistics *stats) const {
366 7 const int reset = 0;
367 int current;
368 int highwater;
369 7 int retval = SQLITE_OK;
370
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7 retval |= sqlite3_db_status(sqlite_db(), SQLITE_DBSTATUS_LOOKASIDE_USED,
371 &current, &highwater, reset);
372 7 stats->lookaside_slots_used = current;
373 7 stats->lookaside_slots_max = highwater;
374
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7 retval |= sqlite3_db_status(sqlite_db(), SQLITE_DBSTATUS_LOOKASIDE_HIT,
375 &current, &highwater, reset);
376 7 stats->lookaside_hit = highwater;
377
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7 retval |= sqlite3_db_status(sqlite_db(), SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE,
378 &current, &highwater, reset);
379 7 stats->lookaside_miss_size = highwater;
380
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7 retval |= sqlite3_db_status(sqlite_db(), SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL,
381 &current, &highwater, reset);
382 7 stats->lookaside_miss_full = highwater;
383
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7 retval |= sqlite3_db_status(sqlite_db(), SQLITE_DBSTATUS_CACHE_USED, &current,
384 &highwater, reset);
385 7 stats->page_cache_used = current;
386
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7 retval |= sqlite3_db_status(sqlite_db(), SQLITE_DBSTATUS_CACHE_HIT, &current,
387 &highwater, reset);
388 7 stats->page_cache_hit = current;
389
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7 retval |= sqlite3_db_status(sqlite_db(), SQLITE_DBSTATUS_CACHE_MISS, &current,
390 &highwater, reset);
391 7 stats->page_cache_miss = current;
392
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7 retval |= sqlite3_db_status(sqlite_db(), SQLITE_DBSTATUS_SCHEMA_USED,
393 &current, &highwater, reset);
394 7 stats->schema_used = current;
395
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7 retval |= sqlite3_db_status(sqlite_db(), SQLITE_DBSTATUS_STMT_USED, &current,
396 &highwater, reset);
397 7 stats->stmt_used = current;
398
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7 assert(retval == SQLITE_OK);
399 7 }
400
401
402 template<class DerivedT>
403 1193 double Database<DerivedT>::GetFreePageRatio() const {
404
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2386 Sql free_page_count_query(this->sqlite_db(), "PRAGMA freelist_count;");
405
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2386 Sql page_count_query(this->sqlite_db(), "PRAGMA page_count;");
406
407
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1193 const bool retval = page_count_query.FetchRow()
408
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1193 && free_page_count_query.FetchRow();
409
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1193 assert(retval);
410
411
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1193 const int64_t pages = page_count_query.RetrieveInt64(0);
412
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1193 const int64_t free_pages = free_page_count_query.RetrieveInt64(0);
413
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1193 assert(pages > 0);
414
415 1193 return (static_cast<double>(free_pages) / static_cast<double>(pages));
416 1193 }
417
418
419 template<class DerivedT>
420 380 bool Database<DerivedT>::Vacuum() const {
421
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380 assert(read_write_);
422 664 return static_cast<const DerivedT *>(this)->CompactDatabase()
423
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380 && Sql(this->sqlite_db(), "VACUUM;").Execute();
424 }
425
426
427 template<class DerivedT>
428 void Database<DerivedT>::PrintSqlError(const std::string &error_msg) {
429 LogCvmfs(kLogSql, kLogStderr, "%s\nSQLite said: '%s'", error_msg.c_str(),
430 this->GetLastErrorMsg().c_str());
431 }
432
433 template<class DerivedT>
434 const float Database<DerivedT>::kSchemaEpsilon = 0.0005;
435 template<class DerivedT>
436 const char *Database<DerivedT>::kSchemaVersionKey = "schema";
437 template<class DerivedT>
438 const char *Database<DerivedT>::kSchemaRevisionKey = "schema_revision";
439
440
441 //
442 // # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
443 //
444
445
446 template<>
447 1683 inline bool Sql::Bind(const int index, const int &value) {
448 1683 return this->BindInt64(index, value);
449 }
450
451 template<>
452 4380 inline bool Sql::Bind(const int index, const unsigned int &value) {
453 4380 return this->BindInt64(index, static_cast<int>(value));
454 }
455
456 template<>
457 4300 inline bool Sql::Bind(const int index, const uint64_t &value) {
458 4300 return this->BindInt64(index, static_cast<int64_t>(value));
459 }
460
461 template<>
462 inline bool Sql::Bind(const int index, const sqlite3_int64 &value) {
463 return this->BindInt64(index, value);
464 }
465
466 template<>
467 3861 inline bool Sql::Bind(const int index, const std::string &value) {
468 3861 return this->BindTextTransient(index, value);
469 }
470
471 template<>
472 4160 inline bool Sql::Bind(const int index, const float &value) {
473 4160 return this->BindDouble(index, value);
474 }
475
476 template<>
477 64 inline bool Sql::Bind(const int index, const double &value) {
478 64 return this->BindDouble(index, value);
479 }
480
481
482 template<>
483 4146 inline int Sql::Retrieve(const int index) {
484 4146 return static_cast<int>(this->RetrieveInt64(index));
485 }
486
487 template<>
488 inline bool Sql::Retrieve(const int index) {
489 return static_cast<bool>(this->RetrieveInt(index));
490 }
491
492 template<>
493 inline sqlite3_int64 Sql::Retrieve(const int index) {
494 return this->RetrieveInt64(index);
495 }
496
497 template<>
498 2148 inline uint64_t Sql::Retrieve(const int index) {
499 2148 return static_cast<uint64_t>(this->RetrieveInt64(index));
500 }
501
502 template<>
503 2471 inline std::string Sql::Retrieve(const int index) {
504 2471 return RetrieveString(index);
505 }
506
507 template<>
508 64 inline float Sql::Retrieve(const int index) {
509 64 return static_cast<float>(this->RetrieveDouble(index));
510 }
511
512 template<>
513 3374 inline double Sql::Retrieve(const int index) {
514 3374 return this->RetrieveDouble(index);
515 }
516
517 } // namespace sqlite
518
519 #endif // CVMFS_SQL_IMPL_H_
520