1 |
85ad3d82
|
Assos Assos
|
<?php
|
2 |
|
|
|
3 |
|
|
/**
|
4 |
|
|
* @file
|
5 |
|
|
* Query code for SQLite embedded database engine.
|
6 |
|
|
*/
|
7 |
|
|
|
8 |
|
|
/**
|
9 |
|
|
* @addtogroup database
|
10 |
|
|
* @{
|
11 |
|
|
*/
|
12 |
|
|
|
13 |
|
|
/**
|
14 |
|
|
* SQLite specific implementation of InsertQuery.
|
15 |
|
|
*
|
16 |
|
|
* We ignore all the default fields and use the clever SQLite syntax:
|
17 |
|
|
* INSERT INTO table DEFAULT VALUES
|
18 |
|
|
* for degenerated "default only" queries.
|
19 |
|
|
*/
|
20 |
|
|
class InsertQuery_sqlite extends InsertQuery {
|
21 |
|
|
|
22 |
|
|
public function execute() {
|
23 |
|
|
if (!$this->preExecute()) {
|
24 |
|
|
return NULL;
|
25 |
|
|
}
|
26 |
|
|
if (count($this->insertFields)) {
|
27 |
|
|
return parent::execute();
|
28 |
|
|
}
|
29 |
|
|
else {
|
30 |
|
|
return $this->connection->query('INSERT INTO {' . $this->table . '} DEFAULT VALUES', array(), $this->queryOptions);
|
31 |
|
|
}
|
32 |
|
|
}
|
33 |
|
|
|
34 |
|
|
public function __toString() {
|
35 |
|
|
// Create a sanitized comment string to prepend to the query.
|
36 |
|
|
$comments = $this->connection->makeComment($this->comments);
|
37 |
|
|
|
38 |
|
|
// Produce as many generic placeholders as necessary.
|
39 |
|
|
$placeholders = array_fill(0, count($this->insertFields), '?');
|
40 |
|
|
|
41 |
|
|
// If we're selecting from a SelectQuery, finish building the query and
|
42 |
|
|
// pass it back, as any remaining options are irrelevant.
|
43 |
|
|
if (!empty($this->fromQuery)) {
|
44 |
|
|
$insert_fields_string = $this->insertFields ? ' (' . implode(', ', $this->insertFields) . ') ' : ' ';
|
45 |
|
|
return $comments . 'INSERT INTO {' . $this->table . '}' . $insert_fields_string . $this->fromQuery;
|
46 |
|
|
}
|
47 |
|
|
|
48 |
|
|
return $comments . 'INSERT INTO {' . $this->table . '} (' . implode(', ', $this->insertFields) . ') VALUES (' . implode(', ', $placeholders) . ')';
|
49 |
|
|
}
|
50 |
|
|
|
51 |
|
|
}
|
52 |
|
|
|
53 |
|
|
/**
|
54 |
|
|
* SQLite specific implementation of UpdateQuery.
|
55 |
|
|
*
|
56 |
|
|
* SQLite counts all the rows that match the conditions as modified, even if they
|
57 |
|
|
* will not be affected by the query. We workaround this by ensuring that
|
58 |
|
|
* we don't select those rows.
|
59 |
|
|
*
|
60 |
|
|
* A query like this one:
|
61 |
|
|
* UPDATE test SET col1 = 'newcol1', col2 = 'newcol2' WHERE tid = 1
|
62 |
|
|
* will become:
|
63 |
|
|
* UPDATE test SET col1 = 'newcol1', col2 = 'newcol2' WHERE tid = 1 AND (col1 <> 'newcol1' OR col2 <> 'newcol2')
|
64 |
|
|
*/
|
65 |
|
|
class UpdateQuery_sqlite extends UpdateQuery {
|
66 |
|
|
public function execute() {
|
67 |
|
|
if (!empty($this->queryOptions['sqlite_return_matched_rows'])) {
|
68 |
|
|
return parent::execute();
|
69 |
|
|
}
|
70 |
|
|
|
71 |
|
|
// Get the fields used in the update query.
|
72 |
|
|
$fields = $this->expressionFields + $this->fields;
|
73 |
|
|
|
74 |
|
|
// Add the inverse of the fields to the condition.
|
75 |
|
|
$condition = new DatabaseCondition('OR');
|
76 |
|
|
foreach ($fields as $field => $data) {
|
77 |
|
|
if (is_array($data)) {
|
78 |
|
|
// The field is an expression.
|
79 |
|
|
$condition->where($field . ' <> ' . $data['expression']);
|
80 |
|
|
$condition->isNull($field);
|
81 |
|
|
}
|
82 |
|
|
elseif (!isset($data)) {
|
83 |
|
|
// The field will be set to NULL.
|
84 |
|
|
$condition->isNotNull($field);
|
85 |
|
|
}
|
86 |
|
|
else {
|
87 |
|
|
$condition->condition($field, $data, '<>');
|
88 |
|
|
$condition->isNull($field);
|
89 |
|
|
}
|
90 |
|
|
}
|
91 |
|
|
if (count($condition)) {
|
92 |
|
|
$condition->compile($this->connection, $this);
|
93 |
|
|
$this->condition->where((string) $condition, $condition->arguments());
|
94 |
|
|
}
|
95 |
|
|
return parent::execute();
|
96 |
|
|
}
|
97 |
|
|
|
98 |
|
|
}
|
99 |
|
|
|
100 |
|
|
/**
|
101 |
|
|
* SQLite specific implementation of DeleteQuery.
|
102 |
|
|
*
|
103 |
|
|
* When the WHERE is omitted from a DELETE statement and the table being deleted
|
104 |
|
|
* has no triggers, SQLite uses an optimization to erase the entire table content
|
105 |
|
|
* without having to visit each row of the table individually.
|
106 |
|
|
*
|
107 |
|
|
* Prior to SQLite 3.6.5, SQLite does not return the actual number of rows deleted
|
108 |
|
|
* by that optimized "truncate" optimization.
|
109 |
|
|
*/
|
110 |
|
|
class DeleteQuery_sqlite extends DeleteQuery {
|
111 |
|
|
public function execute() {
|
112 |
|
|
if (!count($this->condition)) {
|
113 |
|
|
$total_rows = $this->connection->query('SELECT COUNT(*) FROM {' . $this->connection->escapeTable($this->table) . '}')->fetchField();
|
114 |
|
|
parent::execute();
|
115 |
|
|
return $total_rows;
|
116 |
|
|
}
|
117 |
|
|
else {
|
118 |
|
|
return parent::execute();
|
119 |
|
|
}
|
120 |
|
|
}
|
121 |
|
|
}
|
122 |
|
|
|
123 |
|
|
/**
|
124 |
|
|
* SQLite specific implementation of TruncateQuery.
|
125 |
|
|
*
|
126 |
|
|
* SQLite doesn't support TRUNCATE, but a DELETE query with no condition has
|
127 |
|
|
* exactly the effect (it is implemented by DROPing the table).
|
128 |
|
|
*/
|
129 |
|
|
class TruncateQuery_sqlite extends TruncateQuery {
|
130 |
|
|
public function __toString() {
|
131 |
|
|
// Create a sanitized comment string to prepend to the query.
|
132 |
|
|
$comments = $this->connection->makeComment($this->comments);
|
133 |
|
|
|
134 |
|
|
return $comments . 'DELETE FROM {' . $this->connection->escapeTable($this->table) . '} ';
|
135 |
|
|
}
|
136 |
|
|
}
|
137 |
|
|
|
138 |
|
|
/**
|
139 |
|
|
* @} End of "addtogroup database".
|
140 |
|
|
*/ |