/
sqlite.php
481 lines (375 loc) · 10.8 KB
/
sqlite.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
<?php
/**
* dibi - tiny'n'smart database abstraction layer
* ----------------------------------------------
*
* Copyright (c) 2005, 2009 David Grudl (http://davidgrudl.com)
*
* This source file is subject to the "dibi license" that is bundled
* with this package in the file license.txt.
*
* For more information please see http://dibiphp.com
*
* @copyright Copyright (c) 2005, 2009 David Grudl
* @license http://dibiphp.com/license dibi license
* @link http://dibiphp.com
* @package dibi
*/
/**
* The dibi driver for SQLite database.
*
* Connection options:
* - 'database' (or 'file') - the filename of the SQLite database
* - 'persistent' - try to find a persistent link?
* - 'unbuffered' - sends query without fetching and buffering the result rows automatically?
* - 'lazy' - if TRUE, connection will be established only when required
* - 'formatDate' - how to format date in SQL (@see date)
* - 'formatDateTime' - how to format datetime in SQL (@see date)
* - 'dbcharset' - database character encoding (will be converted to 'charset')
* - 'charset' - character encoding to set (default is UTF-8)
* - 'resource' - connection resource (optional)
*
* @author David Grudl
* @copyright Copyright (c) 2005, 2009 David Grudl
* @package dibi
*/
class DibiSqliteDriver extends DibiObject implements IDibiDriver
{
/** @var resource Connection resource */
private $connection;
/** @var resource Resultset resource */
private $resultSet;
/** @var bool Is buffered (seekable and countable)? */
private $buffered;
/** @var string Date and datetime format */
private $fmtDate, $fmtDateTime;
/** @var string character encoding */
private $dbcharset, $charset;
/**
* @throws DibiException
*/
public function __construct()
{
if (!extension_loaded('sqlite')) {
throw new DibiDriverException("PHP extension 'sqlite' is not loaded.");
}
}
/**
* Connects to a database.
* @return void
* @throws DibiException
*/
public function connect(array &$config)
{
DibiConnection::alias($config, 'database', 'file');
$this->fmtDate = isset($config['formatDate']) ? $config['formatDate'] : 'U';
$this->fmtDateTime = isset($config['formatDateTime']) ? $config['formatDateTime'] : 'U';
$errorMsg = '';
if (isset($config['resource'])) {
$this->connection = $config['resource'];
} elseif (empty($config['persistent'])) {
$this->connection = @sqlite_open($config['database'], 0666, $errorMsg); // intentionally @
} else {
$this->connection = @sqlite_popen($config['database'], 0666, $errorMsg); // intentionally @
}
if (!$this->connection) {
throw new DibiDriverException($errorMsg);
}
$this->buffered = empty($config['unbuffered']);
$this->dbcharset = empty($config['dbcharset']) ? 'UTF-8' : $config['dbcharset'];
$this->charset = empty($config['charset']) ? 'UTF-8' : $config['charset'];
if (strcasecmp($this->dbcharset, $this->charset) === 0) {
$this->dbcharset = $this->charset = NULL;
}
}
/**
* Disconnects from a database.
* @return void
*/
public function disconnect()
{
sqlite_close($this->connection);
}
/**
* Executes the SQL query.
* @param string SQL statement.
* @return IDibiDriver|NULL
* @throws DibiDriverException
*/
public function query($sql)
{
if ($this->dbcharset !== NULL) {
$sql = iconv($this->charset, $this->dbcharset . '//IGNORE', $sql);
}
DibiDriverException::tryError();
if ($this->buffered) {
$this->resultSet = sqlite_query($this->connection, $sql);
} else {
$this->resultSet = sqlite_unbuffered_query($this->connection, $sql);
}
if (DibiDriverException::catchError($msg)) {
throw new DibiDriverException($msg, sqlite_last_error($this->connection), $sql);
}
return is_resource($this->resultSet) ? clone $this : NULL;
}
/**
* Gets the number of affected rows by the last INSERT, UPDATE or DELETE query.
* @return int|FALSE number of rows or FALSE on error
*/
public function getAffectedRows()
{
return sqlite_changes($this->connection);
}
/**
* Retrieves the ID generated for an AUTO_INCREMENT column by the previous INSERT query.
* @return int|FALSE int on success or FALSE on failure
*/
public function getInsertId($sequence)
{
return sqlite_last_insert_rowid($this->connection);
}
/**
* Begins a transaction (if supported).
* @param string optional savepoint name
* @return void
* @throws DibiDriverException
*/
public function begin($savepoint = NULL)
{
$this->query('BEGIN');
}
/**
* Commits statements in a transaction.
* @param string optional savepoint name
* @return void
* @throws DibiDriverException
*/
public function commit($savepoint = NULL)
{
$this->query('COMMIT');
}
/**
* Rollback changes in a transaction.
* @param string optional savepoint name
* @return void
* @throws DibiDriverException
*/
public function rollback($savepoint = NULL)
{
$this->query('ROLLBACK');
}
/**
* Returns the connection resource.
* @return mixed
*/
public function getResource()
{
return $this->connection;
}
/********************* SQL ****************d*g**/
/**
* Encodes data for use in a SQL statement.
* @param mixed value
* @param string type (dibi::TEXT, dibi::BOOL, ...)
* @return string encoded value
* @throws InvalidArgumentException
*/
public function escape($value, $type)
{
switch ($type) {
case dibi::TEXT:
case dibi::BINARY:
return "'" . sqlite_escape_string($value) . "'";
case dibi::IDENTIFIER:
return '[' . str_replace('.', '].[', strtr($value, '[]', ' ')) . ']';
case dibi::BOOL:
return $value ? 1 : 0;
case dibi::DATE:
return $value instanceof DateTime ? $value->format($this->fmtDate) : date($this->fmtDate, $value);
case dibi::DATETIME:
return $value instanceof DateTime ? $value->format($this->fmtDateTime) : date($this->fmtDateTime, $value);
default:
throw new InvalidArgumentException('Unsupported type.');
}
}
/**
* Decodes data from result set.
* @param string value
* @param string type (dibi::BINARY)
* @return string decoded value
* @throws InvalidArgumentException
*/
public function unescape($value, $type)
{
if ($type === dibi::BINARY) {
return $value;
}
throw new InvalidArgumentException('Unsupported type.');
}
/**
* Injects LIMIT/OFFSET to the SQL query.
* @param string &$sql The SQL query that will be modified.
* @param int $limit
* @param int $offset
* @return void
*/
public function applyLimit(&$sql, $limit, $offset)
{
if ($limit < 0 && $offset < 1) return;
$sql .= ' LIMIT ' . $limit . ($offset > 0 ? ' OFFSET ' . (int) $offset : '');
}
/********************* result set ****************d*g**/
/**
* Returns the number of rows in a result set.
* @return int
*/
public function getRowCount()
{
if (!$this->buffered) {
throw new DibiDriverException('Row count is not available for unbuffered queries.');
}
return sqlite_num_rows($this->resultSet);
}
/**
* Fetches the row at current position and moves the internal cursor to the next position.
* @param bool TRUE for associative array, FALSE for numeric
* @return array array on success, nonarray if no next record
* @internal
*/
public function fetch($assoc)
{
$row = sqlite_fetch_array($this->resultSet, $assoc ? SQLITE_ASSOC : SQLITE_NUM);
$charset = $this->charset === NULL ? NULL : $this->charset . '//TRANSLIT';
if ($row && ($assoc || $charset)) {
$tmp = array();
foreach ($row as $k => $v) {
if ($charset !== NULL && is_string($v)) {
$v = iconv($this->dbcharset, $charset, $v);
}
$tmp[str_replace(array('[', ']'), '', $k)] = $v;
}
return $tmp;
}
return $row;
}
/**
* Moves cursor position without fetching row.
* @param int the 0-based cursor pos to seek to
* @return boolean TRUE on success, FALSE if unable to seek to specified record
* @throws DibiException
*/
public function seek($row)
{
if (!$this->buffered) {
throw new DibiDriverException('Cannot seek an unbuffered result set.');
}
return sqlite_seek($this->resultSet, $row);
}
/**
* Frees the resources allocated for this result set.
* @return void
*/
public function free()
{
$this->resultSet = NULL;
}
/**
* Returns metadata for all columns in a result set.
* @return array
*/
public function getColumnsMeta()
{
$count = sqlite_num_fields($this->resultSet);
$res = array();
for ($i = 0; $i < $count; $i++) {
$name = str_replace(array('[', ']'), '', sqlite_field_name($this->resultSet, $i));
$pair = explode('.', $name);
$res[] = array(
'name' => isset($pair[1]) ? $pair[1] : $pair[0],
'table' => isset($pair[1]) ? $pair[0] : NULL,
'fullname' => $name,
'nativetype' => NULL,
);
}
return $res;
}
/**
* Returns the result set resource.
* @return mixed
*/
public function getResultResource()
{
return $this->resultSet;
}
/********************* reflection ****************d*g**/
/**
* Returns list of tables.
* @return array
*/
public function getTables()
{
$this->query("
SELECT name, type = 'view' as view FROM sqlite_master WHERE type IN ('table', 'view')
UNION ALL
SELECT name, type = 'view' as view FROM sqlite_temp_master WHERE type IN ('table', 'view')
ORDER BY name
");
$res = array();
while ($row = $this->fetch(TRUE)) {
$res[] = $row;
}
$this->free();
return $res;
}
/**
* Returns metadata for all columns in a table.
* @param string
* @return array
*/
public function getColumns($table)
{
throw new NotImplementedException;
}
/**
* Returns metadata for all indexes in a table.
* @param string
* @return array
*/
public function getIndexes($table)
{
throw new NotImplementedException;
}
/**
* Returns metadata for all foreign keys in a table.
* @param string
* @return array
*/
public function getForeignKeys($table)
{
throw new NotImplementedException;
}
/********************* user defined functions ****************d*g**/
/**
* Registers an user defined function for use in SQL statements.
* @param string function name
* @param mixed callback
* @param int num of arguments
* @return void
*/
public function registerFunction($name, $callback, $numArgs = -1)
{
sqlite_create_function($this->connection, $name, $callback, $numArgs);
}
/**
* Registers an aggregating user defined function for use in SQL statements.
* @param string function name
* @param mixed callback called for each row of the result set
* @param mixed callback called to aggregate the "stepped" data from each row
* @param int num of arguments
* @return void
*/
public function registerAggregateFunction($name, $rowCallback, $agrCallback, $numArgs = -1)
{
sqlite_create_aggregate($this->connection, $name, $rowCallback, $agrCallback, $numArgs);
}
}