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
|
<?php
namespace PicoDb;
use PDO;
use PicoDb\Builder\InsertBuilder;
use PicoDb\Builder\UpdateBuilder;
/**
* Handle Large Objects (LOBs)
*
* @package PicoDb
* @author Frederic Guillot
*/
class LargeObject extends Table
{
/**
* Fetch large object as file descriptor
*
* This method is not compatible with Sqlite and Mysql (return a string instead of resource)
*
* @access public
* @param string $column
* @return resource
*/
public function findOneColumnAsStream($column)
{
$this->limit(1);
$this->columns($column);
$rq = $this->db->getStatementHandler()
->withSql($this->buildSelectQuery())
->withPositionalParams($this->conditionBuilder->getValues())
->execute();
$rq->bindColumn($column, $fd, PDO::PARAM_LOB);
$rq->fetch(PDO::FETCH_BOUND);
return $fd;
}
/**
* Fetch large object as string
*
* @access public
* @param string $column
* @return string
*/
public function findOneColumnAsString($column)
{
$fd = $this->findOneColumnAsStream($column);
if (is_string($fd)) {
return $fd;
}
return stream_get_contents($fd);
}
/**
* Insert large object from stream
*
* @access public
* @param string $blobColumn
* @param resource|string $blobDescriptor
* @param array $data
* @return bool
*/
public function insertFromStream($blobColumn, &$blobDescriptor, array $data = array())
{
$columns = array_merge(array($blobColumn), array_keys($data));
$this->db->startTransaction();
$result = $this->db->getStatementHandler()
->withSql(InsertBuilder::getInstance($this->db, $this->conditionBuilder)
->withTable($this->name)
->withColumns($columns)
->build()
)
->withNamedParams($data)
->withLobParam($blobColumn, $blobDescriptor)
->execute();
$this->db->closeTransaction();
return $result !== false;
}
/**
* Insert large object from file
*
* @access public
* @param string $blobColumn
* @param string $filename
* @param array $data
* @return bool
*/
public function insertFromFile($blobColumn, $filename, array $data = array())
{
$fp = fopen($filename, 'rb');
$result = $this->insertFromStream($blobColumn, $fp, $data);
fclose($fp);
return $result;
}
/**
* Insert large object from string
*
* @access public
* @param string $blobColumn
* @param string $blobData
* @param array $data
* @return bool
*/
public function insertFromString($blobColumn, &$blobData, array $data = array())
{
return $this->insertFromStream($blobColumn, $blobData, $data);
}
/**
* Update large object from stream
*
* @access public
* @param string $blobColumn
* @param resource $blobDescriptor
* @param array $data
* @return bool
*/
public function updateFromStream($blobColumn, &$blobDescriptor, array $data = array())
{
$values = array_merge(array_values($data), $this->conditionBuilder->getValues());
$columns = array_merge(array($blobColumn), array_keys($data));
$this->db->startTransaction();
$result = $this->db->getStatementHandler()
->withSql(UpdateBuilder::getInstance($this->db, $this->conditionBuilder)
->withTable($this->name)
->withColumns($columns)
->build()
)
->withPositionalParams($values)
->withLobParam($blobColumn, $blobDescriptor)
->execute();
$this->db->closeTransaction();
return $result !== false;
}
/**
* Update large object from file
*
* @access public
* @param string $blobColumn
* @param string $filename
* @param array $data
* @return bool
*/
public function updateFromFile($blobColumn, $filename, array $data = array())
{
$fp = fopen($filename, 'r');
$result = $this->updateFromStream($blobColumn, $fp, $data);
fclose($fp);
return $result;
}
}
|
