blob: 83e75af2dbd88bf71bbf2dbaad4769fe0972469c (
plain)
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
|
<?php
namespace PicoDb\Driver;
use PDO;
/**
* Microsoft SQL Server Driver
*
* @package PicoDb\Driver
* @author Algy Taylor <thomas.taylor@cmft.nhs.uk>
*/
class Mssql extends Base
{
/**
* List of required settings options
*
* @access protected
* @var array
*/
protected $requiredAttributes = array(
'hostname',
'username',
'password',
'database',
);
/**
* Table to store the schema version
*
* @access private
* @var array
*/
private $schemaTable = 'schema_version';
/**
* Create a new PDO connection
*
* @access public
* @param array $settings
*/
public function createConnection(array $settings)
{
$dsn = 'sqlsrv:Server=' . $settings['hostname'] . ';Database=' . $settings['database'];
if (! empty($settings['port'])) {
$dsn .= ';port=' . $settings['port'];
}
$this->pdo = new PDO($dsn, $settings['username'], $settings['password']);
if (isset($settings['schema_table'])) {
$this->schemaTable = $settings['schema_table'];
}
}
/**
* Enable foreign keys
*
* @access public
*/
public function enableForeignKeys()
{
$this->pdo->exec('EXEC sp_MSforeachtable @command1="ALTER TABLE ? CHECK CONSTRAINT ALL"; GO;');
}
/**
* Disable foreign keys
*
* @access public
*/
public function disableForeignKeys()
{
$this->pdo->exec('EXEC sp_MSforeachtable @command1="ALTER TABLE ? NOCHECK CONSTRAINT ALL"; GO;');
}
/**
* Return true if the error code is a duplicate key
*
* @access public
* @param integer $code
* @return boolean
*/
public function isDuplicateKeyError($code)
{
return $code == 2601;
}
/**
* Escape identifier
*
* https://msdn.microsoft.com/en-us/library/ms175874.aspx
*
* @access public
* @param string $identifier
* @return string
*/
public function escape($identifier)
{
return '['.$identifier.']';
}
/**
* Get non standard operator
*
* @access public
* @param string $operator
* @return string
*/
public function getOperator($operator)
{
if ($operator === 'LIKE' || $operator === 'ILIKE') {
return 'LIKE';
}
return '';
}
/**
* Get last inserted id
*
* @access public
* @return integer
*/
public function getLastId()
{
return $this->pdo->lastInsertId();
}
/**
* Get current schema version
*
* @access public
* @return integer
*/
public function getSchemaVersion()
{
$this->pdo->exec("CREATE TABLE IF NOT EXISTS [".$this->schemaTable."] ([version] INT DEFAULT '0')");
$rq = $this->pdo->prepare('SELECT [version] FROM ['.$this->schemaTable.']');
$rq->execute();
$result = $rq->fetchColumn();
if ($result !== false) {
return (int) $result;
}
else {
$this->pdo->exec('INSERT INTO ['.$this->schemaTable.'] VALUES(0)');
}
return 0;
}
/**
* Set current schema version
*
* @access public
* @param integer $version
*/
public function setSchemaVersion($version)
{
$rq = $this->pdo->prepare('UPDATE ['.$this->schemaTable.'] SET [version]=?');
$rq->execute(array($version));
}
/**
* Run EXPLAIN command
*
* @param string $sql
* @param array $values
* @return array
*/
public function explain($sql, array $values)
{
$this->getConnection()->exec('SET SHOWPLAN_ALL ON');
return $this->getConnection()->query($this->getSqlFromPreparedStatement($sql, $values))->fetchAll(PDO::FETCH_ASSOC);
}
}
|
