-
Notifications
You must be signed in to change notification settings - Fork 3.4k
/
Sqlserver.php
800 lines (734 loc) · 22.7 KB
/
Sqlserver.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
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
<?php
/**
* MS SQL Server layer for DBO
*
* PHP 5
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package Cake.Model.Datasource.Database
* @since CakePHP(tm) v 0.10.5.1790
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
App::uses('DboSource', 'Model/Datasource');
/**
* Dbo driver for SQLServer
*
* A Dbo driver for SQLServer 2008 and higher. Requires the `sqlsrv`
* and `pdo_sqlsrv` extensions to be enabled.
*
* @package Cake.Model.Datasource.Database
*/
class Sqlserver extends DboSource {
/**
* Driver description
*
* @var string
*/
public $description = "SQL Server DBO Driver";
/**
* Starting quote character for quoted identifiers
*
* @var string
*/
public $startQuote = "[";
/**
* Ending quote character for quoted identifiers
*
* @var string
*/
public $endQuote = "]";
/**
* Creates a map between field aliases and numeric indexes. Workaround for the
* SQL Server driver's 30-character column name limitation.
*
* @var array
*/
protected $_fieldMappings = array();
/**
* Storing the last affected value
*
* @var mixed
*/
protected $_lastAffected = false;
/**
* Base configuration settings for MS SQL driver
*
* @var array
*/
protected $_baseConfig = array(
'persistent' => true,
'host' => 'localhost\SQLEXPRESS',
'login' => '',
'password' => '',
'database' => 'cake'
);
/**
* MS SQL column definition
*
* @var array
*/
public $columns = array(
'primary_key' => array('name' => 'IDENTITY (1, 1) NOT NULL'),
'string' => array('name' => 'nvarchar', 'limit' => '255'),
'text' => array('name' => 'nvarchar', 'limit' => 'MAX'),
'integer' => array('name' => 'int', 'formatter' => 'intval'),
'float' => array('name' => 'numeric', 'formatter' => 'floatval'),
'datetime' => array('name' => 'datetime', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
'timestamp' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
'time' => array('name' => 'datetime', 'format' => 'H:i:s', 'formatter' => 'date'),
'date' => array('name' => 'datetime', 'format' => 'Y-m-d', 'formatter' => 'date'),
'binary' => array('name' => 'varbinary'),
'boolean' => array('name' => 'bit')
);
/**
* Index of basic SQL commands
*
* @var array
*/
protected $_commands = array(
'begin' => 'BEGIN TRANSACTION',
'commit' => 'COMMIT',
'rollback' => 'ROLLBACK'
);
/**
* Magic column name used to provide pagination support for SQLServer 2008
* which lacks proper limit/offset support.
*/
const ROW_COUNTER = '_cake_page_rownum_';
/**
* The version of SQLServer being used. If greater than 11
* Normal limit offset statements will be used
*
* @var string
*/
protected $_version;
/**
* Connects to the database using options in the given configuration array.
*
* @return boolean True if the database could be connected, else false
* @throws MissingConnectionException
*/
public function connect() {
$config = $this->config;
$this->connected = false;
try {
$flags = array(
PDO::ATTR_PERSISTENT => $config['persistent'],
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
);
if (!empty($config['encoding'])) {
$flags[PDO::SQLSRV_ATTR_ENCODING] = $config['encoding'];
}
$this->_connection = new PDO(
"sqlsrv:server={$config['host']};Database={$config['database']}",
$config['login'],
$config['password'],
$flags
);
$this->connected = true;
} catch (PDOException $e) {
throw new MissingConnectionException(array('class' => $e->getMessage()));
}
$this->_version = $this->_connection->getAttribute(PDO::ATTR_SERVER_VERSION);
return $this->connected;
}
/**
* Check that PDO SQL Server is installed/loaded
*
* @return boolean
*/
public function enabled() {
return in_array('sqlsrv', PDO::getAvailableDrivers());
}
/**
* Returns an array of sources (tables) in the database.
*
* @param mixed $data
* @return array Array of table names in the database
*/
public function listSources($data = null) {
$cache = parent::listSources();
if ($cache !== null) {
return $cache;
}
$result = $this->_execute("SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE='BASE TABLE'");
if (!$result) {
$result->closeCursor();
return array();
} else {
$tables = array();
while ($line = $result->fetch()) {
$tables[] = $line[0];
}
$result->closeCursor();
parent::listSources($tables);
return $tables;
}
}
/**
* Returns an array of the fields in given table name.
*
* @param Model|string $model Model object to describe, or a string table name.
* @return array Fields in table. Keys are name and type
* @throws CakeException
*/
public function describe($model) {
$cache = parent::describe($model);
if ($cache != null) {
return $cache;
}
$fields = array();
$table = $this->fullTableName($model, false);
$cols = $this->_execute(
"SELECT
COLUMN_NAME as Field,
DATA_TYPE as Type,
COL_LENGTH('" . $table . "', COLUMN_NAME) as Length,
IS_NULLABLE As [Null],
COLUMN_DEFAULT as [Default],
COLUMNPROPERTY(OBJECT_ID('" . $table . "'), COLUMN_NAME, 'IsIdentity') as [Key],
NUMERIC_SCALE as Size
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = '" . $table . "'"
);
if (!$cols) {
throw new CakeException(__d('cake_dev', 'Could not describe table for %s', $table));
}
foreach ($cols as $column) {
$field = $column->Field;
$fields[$field] = array(
'type' => $this->column($column),
'null' => ($column->Null === 'YES' ? true : false),
'default' => preg_replace("/^[(]{1,2}'?([^')]*)?'?[)]{1,2}$/", "$1", $column->Default),
'length' => $this->length($column),
'key' => ($column->Key == '1') ? 'primary' : false
);
if ($fields[$field]['default'] === 'null') {
$fields[$field]['default'] = null;
} else {
$this->value($fields[$field]['default'], $fields[$field]['type']);
}
if ($fields[$field]['key'] !== false && $fields[$field]['type'] == 'integer') {
$fields[$field]['length'] = 11;
} elseif ($fields[$field]['key'] === false) {
unset($fields[$field]['key']);
}
if (in_array($fields[$field]['type'], array('date', 'time', 'datetime', 'timestamp'))) {
$fields[$field]['length'] = null;
}
if ($fields[$field]['type'] == 'float' && !empty($column->Size)) {
$fields[$field]['length'] = $fields[$field]['length'] . ',' . $column->Size;
}
}
$this->_cacheDescription($table, $fields);
$cols->closeCursor();
return $fields;
}
/**
* Generates the fields list of an SQL query.
*
* @param Model $model
* @param string $alias Alias table name
* @param array $fields
* @param boolean $quote
* @return array
*/
public function fields($model, $alias = null, $fields = array(), $quote = true) {
if (empty($alias)) {
$alias = $model->alias;
}
$fields = parent::fields($model, $alias, $fields, false);
$count = count($fields);
if ($count >= 1 && strpos($fields[0], 'COUNT(*)') === false) {
$result = array();
for ($i = 0; $i < $count; $i++) {
$prepend = '';
if (strpos($fields[$i], 'DISTINCT') !== false) {
$prepend = 'DISTINCT ';
$fields[$i] = trim(str_replace('DISTINCT', '', $fields[$i]));
}
if (!preg_match('/\s+AS\s+/i', $fields[$i])) {
if (substr($fields[$i], -1) == '*') {
if (strpos($fields[$i], '.') !== false && $fields[$i] != $alias . '.*') {
$build = explode('.', $fields[$i]);
$AssociatedModel = $model->{$build[0]};
} else {
$AssociatedModel = $model;
}
$_fields = $this->fields($AssociatedModel, $AssociatedModel->alias, array_keys($AssociatedModel->schema()));
$result = array_merge($result, $_fields);
continue;
}
if (strpos($fields[$i], '.') === false) {
$this->_fieldMappings[$alias . '__' . $fields[$i]] = $alias . '.' . $fields[$i];
$fieldName = $this->name($alias . '.' . $fields[$i]);
$fieldAlias = $this->name($alias . '__' . $fields[$i]);
} else {
$build = explode('.', $fields[$i]);
$this->_fieldMappings[$build[0] . '__' . $build[1]] = $fields[$i];
$fieldName = $this->name($build[0] . '.' . $build[1]);
$fieldAlias = $this->name(preg_replace("/^\[(.+)\]$/", "$1", $build[0]) . '__' . $build[1]);
}
if ($model->getColumnType($fields[$i]) == 'datetime') {
$fieldName = "CONVERT(VARCHAR(20), {$fieldName}, 20)";
}
$fields[$i] = "{$fieldName} AS {$fieldAlias}";
}
$result[] = $prepend . $fields[$i];
}
return $result;
} else {
return $fields;
}
}
/**
* Generates and executes an SQL INSERT statement for given model, fields, and values.
* Removes Identity (primary key) column from update data before returning to parent, if
* value is empty.
*
* @param Model $model
* @param array $fields
* @param array $values
* @return array
*/
public function create(Model $model, $fields = null, $values = null) {
if (!empty($values)) {
$fields = array_combine($fields, $values);
}
$primaryKey = $this->_getPrimaryKey($model);
if (array_key_exists($primaryKey, $fields)) {
if (empty($fields[$primaryKey])) {
unset($fields[$primaryKey]);
} else {
$this->_execute('SET IDENTITY_INSERT ' . $this->fullTableName($model) . ' ON');
}
}
$result = parent::create($model, array_keys($fields), array_values($fields));
if (array_key_exists($primaryKey, $fields) && !empty($fields[$primaryKey])) {
$this->_execute('SET IDENTITY_INSERT ' . $this->fullTableName($model) . ' OFF');
}
return $result;
}
/**
* Generates and executes an SQL UPDATE statement for given model, fields, and values.
* Removes Identity (primary key) column from update data before returning to parent.
*
* @param Model $model
* @param array $fields
* @param array $values
* @param mixed $conditions
* @return array
*/
public function update(Model $model, $fields = array(), $values = null, $conditions = null) {
if (!empty($values)) {
$fields = array_combine($fields, $values);
}
if (isset($fields[$model->primaryKey])) {
unset($fields[$model->primaryKey]);
}
if (empty($fields)) {
return true;
}
return parent::update($model, array_keys($fields), array_values($fields), $conditions);
}
/**
* Returns a limit statement in the correct format for the particular database.
*
* @param integer $limit Limit of results returned
* @param integer $offset Offset from which to start results
* @return string SQL limit/offset statement
*/
public function limit($limit, $offset = null) {
if ($limit) {
$rt = '';
if (!strpos(strtolower($limit), 'top') || strpos(strtolower($limit), 'top') === 0) {
$rt = ' TOP';
}
$rt .= ' ' . $limit;
if (is_int($offset) && $offset > 0) {
$rt = ' OFFSET ' . intval($offset) . ' ROWS FETCH FIRST ' . intval($limit) . ' ROWS ONLY';
}
return $rt;
}
return null;
}
/**
* Converts database-layer column types to basic types
*
* @param mixed $real Either the string value of the fields type.
* or the Result object from Sqlserver::describe()
* @return string Abstract column type (i.e. "string")
*/
public function column($real) {
$limit = null;
$col = $real;
if (is_object($real) && isset($real->Field)) {
$limit = $real->Length;
$col = $real->Type;
}
if ($col == 'datetime2') {
return 'datetime';
}
if (in_array($col, array('date', 'time', 'datetime', 'timestamp'))) {
return $col;
}
if ($col == 'bit') {
return 'boolean';
}
if (strpos($col, 'int') !== false) {
return 'integer';
}
if (strpos($col, 'char') !== false && $limit == -1) {
return 'text';
}
if (strpos($col, 'char') !== false) {
return 'string';
}
if (strpos($col, 'text') !== false) {
return 'text';
}
if (strpos($col, 'binary') !== false || $col == 'image') {
return 'binary';
}
if (in_array($col, array('float', 'real', 'decimal', 'numeric'))) {
return 'float';
}
return 'text';
}
/**
* Handle SQLServer specific length properties.
* SQLServer handles text types as nvarchar/varchar with a length of -1.
*
* @param mixed $length Either the length as a string, or a Column descriptor object.
* @return mixed null|integer with length of column.
*/
public function length($length) {
if (is_object($length) && isset($length->Length)) {
if ($length->Length == -1 && strpos($length->Type, 'char') !== false) {
return null;
}
if (in_array($length->Type, array('nchar', 'nvarchar'))) {
return floor($length->Length / 2);
}
return $length->Length;
}
return parent::length($length);
}
/**
* Builds a map of the columns contained in a result
*
* @param PDOStatement $results
* @return void
*/
public function resultSet($results) {
$this->map = array();
$numFields = $results->columnCount();
$index = 0;
while ($numFields-- > 0) {
$column = $results->getColumnMeta($index);
$name = $column['name'];
if (strpos($name, '__')) {
if (isset($this->_fieldMappings[$name]) && strpos($this->_fieldMappings[$name], '.')) {
$map = explode('.', $this->_fieldMappings[$name]);
} elseif (isset($this->_fieldMappings[$name])) {
$map = array(0, $this->_fieldMappings[$name]);
} else {
$map = array(0, $name);
}
} else {
$map = array(0, $name);
}
$map[] = ($column['sqlsrv:decl_type'] == 'bit') ? 'boolean' : $column['native_type'];
$this->map[$index++] = $map;
}
}
/**
* Builds final SQL statement
*
* @param string $type Query type
* @param array $data Query data
* @return string
*/
public function renderStatement($type, $data) {
switch (strtolower($type)) {
case 'select':
extract($data);
$fields = trim($fields);
if (strpos($limit, 'TOP') !== false && strpos($fields, 'DISTINCT ') === 0) {
$limit = 'DISTINCT ' . trim($limit);
$fields = substr($fields, 9);
}
// hack order as SQLServer requires an order if there is a limit.
if ($limit && !$order) {
$order = 'ORDER BY (SELECT NULL)';
}
// For older versions use the subquery version of pagination.
if (version_compare($this->_version, '11', '<') && preg_match('/FETCH\sFIRST\s+([0-9]+)/i', $limit, $offset)) {
preg_match('/OFFSET\s*(\d+)\s*.*?(\d+)\s*ROWS/', $limit, $limitOffset);
$limit = 'TOP ' . intval($limitOffset[2]);
$page = intval($limitOffset[1] / $limitOffset[2]);
$offset = intval($limitOffset[2] * $page);
$rowCounter = self::ROW_COUNTER;
return "
SELECT {$limit} * FROM (
SELECT {$fields}, ROW_NUMBER() OVER ({$order}) AS {$rowCounter}
FROM {$table} {$alias} {$joins} {$conditions} {$group}
) AS _cake_paging_
WHERE _cake_paging_.{$rowCounter} > {$offset}
ORDER BY _cake_paging_.{$rowCounter}
";
} elseif (strpos($limit, 'FETCH') !== false) {
return "SELECT {$fields} FROM {$table} {$alias} {$joins} {$conditions} {$group} {$order} {$limit}";
} else {
return "SELECT {$limit} {$fields} FROM {$table} {$alias} {$joins} {$conditions} {$group} {$order}";
}
break;
case "schema":
extract($data);
foreach ($indexes as $i => $index) {
if (preg_match('/PRIMARY KEY/', $index)) {
unset($indexes[$i]);
break;
}
}
foreach (array('columns', 'indexes') as $var) {
if (is_array(${$var})) {
${$var} = "\t" . implode(",\n\t", array_filter(${$var}));
}
}
return "CREATE TABLE {$table} (\n{$columns});\n{$indexes}";
break;
default:
return parent::renderStatement($type, $data);
break;
}
}
/**
* Returns a quoted and escaped string of $data for use in an SQL statement.
*
* @param string $data String to be prepared for use in an SQL statement
* @param string $column The column into which this data will be inserted
* @return string Quoted and escaped data
*/
public function value($data, $column = null) {
if (is_array($data) || is_object($data)) {
return parent::value($data, $column);
} elseif (in_array($data, array('{$__cakeID__$}', '{$__cakeForeignKey__$}'), true)) {
return $data;
}
if (empty($column)) {
$column = $this->introspectType($data);
}
switch ($column) {
case 'string':
case 'text':
return 'N' . $this->_connection->quote($data, PDO::PARAM_STR);
default:
return parent::value($data, $column);
}
}
/**
* Returns an array of all result rows for a given SQL query.
* Returns false if no rows matched.
*
* @param Model $model
* @param array $queryData
* @param integer $recursive
* @return array Array of resultset rows, or false if no rows matched
*/
public function read(Model $model, $queryData = array(), $recursive = null) {
$results = parent::read($model, $queryData, $recursive);
$this->_fieldMappings = array();
return $results;
}
/**
* Fetches the next row from the current result set.
* Eats the magic ROW_COUNTER variable.
*
* @return mixed
*/
public function fetchResult() {
if ($row = $this->_result->fetch(PDO::FETCH_NUM)) {
$resultRow = array();
foreach ($this->map as $col => $meta) {
list($table, $column, $type) = $meta;
if ($table === 0 && $column === self::ROW_COUNTER) {
continue;
}
$resultRow[$table][$column] = $row[$col];
if ($type === 'boolean' && !is_null($row[$col])) {
$resultRow[$table][$column] = $this->boolean($resultRow[$table][$column]);
}
}
return $resultRow;
}
$this->_result->closeCursor();
return false;
}
/**
* Inserts multiple values into a table
*
* @param string $table
* @param string $fields
* @param array $values
* @return void
*/
public function insertMulti($table, $fields, $values) {
$primaryKey = $this->_getPrimaryKey($table);
$hasPrimaryKey = $primaryKey != null && (
(is_array($fields) && in_array($primaryKey, $fields)
|| (is_string($fields) && strpos($fields, $this->startQuote . $primaryKey . $this->endQuote) !== false))
);
if ($hasPrimaryKey) {
$this->_execute('SET IDENTITY_INSERT ' . $this->fullTableName($table) . ' ON');
}
$table = $this->fullTableName($table);
$fields = implode(', ', array_map(array(&$this, 'name'), $fields));
$this->begin();
foreach ($values as $value) {
$holder = implode(', ', array_map(array(&$this, 'value'), $value));
$this->_execute("INSERT INTO {$table} ({$fields}) VALUES ({$holder})");
}
$this->commit();
if ($hasPrimaryKey) {
$this->_execute('SET IDENTITY_INSERT ' . $this->fullTableName($table) . ' OFF');
}
}
/**
* Generate a database-native column schema string
*
* @param array $column An array structured like the following: array('name'=>'value', 'type'=>'value'[, options]),
* where options can be 'default', 'length', or 'key'.
* @return string
*/
public function buildColumn($column) {
$result = preg_replace('/(int|integer)\([0-9]+\)/i', '$1', parent::buildColumn($column));
if (strpos($result, 'DEFAULT NULL') !== false) {
if (isset($column['default']) && $column['default'] === '') {
$result = str_replace('DEFAULT NULL', "DEFAULT ''", $result);
} else {
$result = str_replace('DEFAULT NULL', 'NULL', $result);
}
} elseif (array_keys($column) == array('type', 'name')) {
$result .= ' NULL';
} elseif (strpos($result, "DEFAULT N'")) {
$result = str_replace("DEFAULT N'", "DEFAULT '", $result);
}
return $result;
}
/**
* Format indexes for create table
*
* @param array $indexes
* @param string $table
* @return string
*/
public function buildIndex($indexes, $table = null) {
$join = array();
foreach ($indexes as $name => $value) {
if ($name == 'PRIMARY') {
$join[] = 'PRIMARY KEY (' . $this->name($value['column']) . ')';
} else if (isset($value['unique']) && $value['unique']) {
$out = "ALTER TABLE {$table} ADD CONSTRAINT {$name} UNIQUE";
if (is_array($value['column'])) {
$value['column'] = implode(', ', array_map(array(&$this, 'name'), $value['column']));
} else {
$value['column'] = $this->name($value['column']);
}
$out .= "({$value['column']});";
$join[] = $out;
}
}
return $join;
}
/**
* Makes sure it will return the primary key
*
* @param mixed $model Model instance of table name
* @return string
*/
protected function _getPrimaryKey($model) {
if (!is_object($model)) {
$model = new Model(false, $model);
}
$schema = $this->describe($model);
foreach ($schema as $field => $props) {
if (isset($props['key']) && $props['key'] == 'primary') {
return $field;
}
}
return null;
}
/**
* Returns number of affected rows in previous database operation. If no previous operation exists,
* this returns false.
*
* @param mixed $source
* @return integer Number of affected rows
*/
public function lastAffected($source = null) {
$affected = parent::lastAffected();
if ($affected === null && $this->_lastAffected !== false) {
return $this->_lastAffected;
}
return $affected;
}
/**
* Executes given SQL statement.
*
* @param string $sql SQL statement
* @param array $params list of params to be bound to query (supported only in select)
* @param array $prepareOptions Options to be used in the prepare statement
* @return mixed PDOStatement if query executes with no problem, true as the result of a successful, false on error
* query returning no rows, such as a CREATE statement, false otherwise
*/
protected function _execute($sql, $params = array(), $prepareOptions = array()) {
$this->_lastAffected = false;
if (strncasecmp($sql, 'SELECT', 6) == 0) {
$prepareOptions += array(PDO::ATTR_CURSOR => PDO::CURSOR_SCROLL);
return parent::_execute($sql, $params, $prepareOptions);
}
try {
$this->_lastAffected = $this->_connection->exec($sql);
if ($this->_lastAffected === false) {
$this->_results = null;
$error = $this->_connection->errorInfo();
$this->error = $error[2];
return false;
}
return true;
} catch (PDOException $e) {
if (isset($query->queryString)) {
$e->queryString = $query->queryString;
} else {
$e->queryString = $sql;
}
throw $e;
}
}
/**
* Generate a "drop table" statement for the given Schema object
*
* @param CakeSchema $schema An instance of a subclass of CakeSchema
* @param string $table Optional. If specified only the table name given will be generated.
* Otherwise, all tables defined in the schema are generated.
* @return string
*/
public function dropSchema(CakeSchema $schema, $table = null) {
$out = '';
foreach ($schema->tables as $curTable => $columns) {
if (!$table || $table == $curTable) {
$t = $this->fullTableName($curTable);
$out .= "IF OBJECT_ID('" . $this->fullTableName($curTable, false). "', 'U') IS NOT NULL DROP TABLE " . $this->fullTableName($curTable) . ";\n";
}
}
return $out;
}
}