# Source for file Oracle.php

Documentation is available at Oracle.php

1. <?php
2. /*
3. * $Id: Oracle.php 1798 2007-06-24 21:05:12Z zYne $
4. *
5. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
6. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
7. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
8. * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
9. * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
10. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
11. * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
12. * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
13. * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
14. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
15. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
16. *
17. * This software consists of voluntary contributions made by many individuals
18. * and is licensed under the LGPL. For more information, see
19. * <http://www.phpdoctrine.com>.
20. */
21. Doctrine::autoload('Doctrine_Connection');
22. /**
23. * Doctrine_Connection_Oracle
24. *
25. * @package Doctrine
26. * @license http://www.opensource.org/licenses/lgpl-license.php LGPL
27. * @category Object Relational Mapping
28. * @link www.phpdoctrine.com
29. * @since 1.0
30. * @version $Revision: 1798 $
31. * @author Konsta Vesterinen <kvesteri@cc.hut.fi>
32. */
33. class Doctrine_Connection_Oracle extends Doctrine_Connection
34. {
35. /**
36. * @var string $driverName the name of this connection driver
37. */
38. protected $driverName = 'Oracle';
40. public function __construct(Doctrine_Manager $manager, $adapter)
41. {
42. $this->supported = array(
43. 'sequences' => true,
44. 'indexes' => true,
45. 'summary_functions' => true,
46. 'order_by_text' => true,
47. 'current_id' => true,
48. 'affected_rows' => true,
49. 'transactions' => true,
50. 'savepoints' => true,
51. 'limit_queries' => true,
52. 'LOBs' => true,
53. 'replace' => 'emulated',
54. 'sub_selects' => true,
55. 'auto_increment' => false, // implementation is broken
56. 'primary_key' => true,
57. 'result_introspection' => true,
58. 'prepared_statements' => true,
59. 'identifier_quoting' => true,
60. 'pattern_escaping' => true,
61. );
62. /**
63. $this->options['DBA_username'] = false;
64. $this->options['DBA_password'] = false;
65. $this->options['database_name_prefix'] = false;
66. $this->options['emulate_database'] = true;
67. $this->options['default_tablespace'] = false;
68. $this->options['default_text_field_length'] = 2000;
69. $this->options['result_prefetching'] = false;
70. */
71. parent::__construct($manager, $adapter);
72. }
73. /**
74. * Sets up the date/time format
75. *
76. */
77. public function setDateFormat($format = 'YYYY-MM-DD HH24:MI:SS')
78. {
79. $this->exec('ALTER SESSION SET NLS_DATE_FORMAT = "' . $format . '"');
80. }
81. /**
82. * Adds an driver-specific LIMIT clause to the query
83. *
84. * @param string $query query to modify
85. * @param integer $limit limit the number of rows
86. * @param integer $offset start reading from given offset
87. * @return string the modified query
88. */
89. public function modifyLimitQuery($query, $limit, $offset)
90. {
91. /**
92. $e = explode("select ",strtolower($query));
93. $e2 = explode(" from ",$e[1]);
94. $fields = $e2[0];
95. */
96. $limit = (int) $limit;
97. $offset = (int) $offset;
98. if (preg_match('/^\s*SELECT/i', $query)) {
99. if ( ! preg_match('/\sFROM\s/i', $query)) {
100. $query .= " FROM dual";
101. }
102. if ($limit > 0) {
103. // taken from http://svn.ez.no/svn/ezcomponents/packages/Database
104. $max = $offset + $limit;
105. if ($offset > 0) {
106. $min = $offset + 1;
107. $query = 'SELECT * FROM (SELECT a.*, ROWNUM dctrn_rownum FROM (' . $query
108. . ') a WHERE ROWNUM <= ' . $max . ') WHERE dctrn_rownum >= ' . $min;
109. } else {
110. $query = 'SELECT a.* FROM (' . $query .') a WHERE ROWNUM <= ' . $max;
111. }
112. }
113. }
114. return $query;
115. }
116. }