| 1 | <?php
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| 2 |
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| 3 | /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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| 4 |
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| 5 | /**
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| 6 | * The PEAR DB driver for PHP's mysql extension
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| 7 | * for interacting with MySQL databases
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| 8 | *
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| 9 | * PHP versions 4 and 5
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| 10 | *
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| 11 | * LICENSE: This source file is subject to version 3.0 of the PHP license
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| 12 | * that is available through the world-wide-web at the following URI:
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| 13 | * http://www.php.net/license/3_0.txt. If you did not receive a copy of
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| 14 | * the PHP License and are unable to obtain it through the web, please
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| 15 | * send a note to [email protected] so we can mail you a copy immediately.
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| 16 | *
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| 17 | * @category Database
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| 18 | * @package DB
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| 19 | * @author Stig Bakken <[email protected]>
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| 20 | * @author Daniel Convissor <[email protected]>
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| 21 | * @copyright 1997-2005 The PHP Group
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| 22 | * @license http://www.php.net/license/3_0.txt PHP License 3.0
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| 23 | * @version CVS: $Id: mysql.php 3952 2006-09-20 09:42:25Z naka $
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| 24 | * @link http://pear.php.net/package/DB
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| 25 | */
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| 26 |
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| 27 | /**
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| 28 | * Obtain the DB_common class so it can be extended from
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| 29 | */
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| 30 | require_once DB_PHP_DIR . '/DB/common.php';
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| 31 |
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| 32 | /**
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| 33 | * The methods PEAR DB uses to interact with PHP's mysql extension
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| 34 | * for interacting with MySQL databases
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| 35 | *
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| 36 | * These methods overload the ones declared in DB_common.
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| 37 | *
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| 38 | * @category Database
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| 39 | * @package DB
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| 40 | * @author Stig Bakken <[email protected]>
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| 41 | * @author Daniel Convissor <[email protected]>
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| 42 | * @copyright 1997-2005 The PHP Group
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| 43 | * @license http://www.php.net/license/3_0.txt PHP License 3.0
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| 44 | * @version Release: @package_version@
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| 45 | * @link http://pear.php.net/package/DB
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| 46 | */
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| 47 | class DB_mysql extends DB_common
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| 48 | {
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| 49 | // {{{ properties
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| 50 |
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| 51 | /**
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| 52 | * The DB driver type (mysql, oci8, odbc, etc.)
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| 53 | * @var string
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| 54 | */
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| 55 | var $phptype = 'mysql';
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| 56 |
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| 57 | /**
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| 58 | * The database syntax variant to be used (db2, access, etc.), if any
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| 59 | * @var string
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| 60 | */
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| 61 | var $dbsyntax = 'mysql';
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| 62 |
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| 63 | /**
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| 64 | * The capabilities of this DB implementation
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| 65 | *
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| 66 | * The 'new_link' element contains the PHP version that first provided
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| 67 | * new_link support for this DBMS. Contains false if it's unsupported.
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| 68 | *
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| 69 | * Meaning of the 'limit' element:
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| 70 | * + 'emulate' = emulate with fetch row by number
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| 71 | * + 'alter' = alter the query
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| 72 | * + false = skip rows
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| 73 | *
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| 74 | * @var array
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| 75 | */
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| 76 | var $features = array(
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| 77 | 'limit' => 'alter',
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| 78 | 'new_link' => '4.2.0',
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| 79 | 'numrows' => true,
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| 80 | 'pconnect' => true,
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| 81 | 'prepare' => false,
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| 82 | 'ssl' => false,
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| 83 | 'transactions' => true,
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| 84 | );
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| 85 |
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| 86 | /**
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| 87 | * A mapping of native error codes to DB error codes
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| 88 | * @var array
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| 89 | */
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| 90 | var $errorcode_map = array(
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| 91 | 1004 => DB_ERROR_CANNOT_CREATE,
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| 92 | 1005 => DB_ERROR_CANNOT_CREATE,
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| 93 | 1006 => DB_ERROR_CANNOT_CREATE,
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| 94 | 1007 => DB_ERROR_ALREADY_EXISTS,
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| 95 | 1008 => DB_ERROR_CANNOT_DROP,
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| 96 | 1022 => DB_ERROR_ALREADY_EXISTS,
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| 97 | 1044 => DB_ERROR_ACCESS_VIOLATION,
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| 98 | 1046 => DB_ERROR_NODBSELECTED,
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| 99 | 1048 => DB_ERROR_CONSTRAINT,
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| 100 | 1049 => DB_ERROR_NOSUCHDB,
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| 101 | 1050 => DB_ERROR_ALREADY_EXISTS,
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| 102 | 1051 => DB_ERROR_NOSUCHTABLE,
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| 103 | 1054 => DB_ERROR_NOSUCHFIELD,
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| 104 | 1061 => DB_ERROR_ALREADY_EXISTS,
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| 105 | 1062 => DB_ERROR_ALREADY_EXISTS,
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| 106 | 1064 => DB_ERROR_SYNTAX,
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| 107 | 1091 => DB_ERROR_NOT_FOUND,
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| 108 | 1100 => DB_ERROR_NOT_LOCKED,
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| 109 | 1136 => DB_ERROR_VALUE_COUNT_ON_ROW,
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| 110 | 1142 => DB_ERROR_ACCESS_VIOLATION,
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| 111 | 1146 => DB_ERROR_NOSUCHTABLE,
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| 112 | 1216 => DB_ERROR_CONSTRAINT,
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| 113 | 1217 => DB_ERROR_CONSTRAINT,
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| 114 | );
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| 115 |
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| 116 | /**
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| 117 | * The raw database connection created by PHP
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| 118 | * @var resource
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| 119 | */
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| 120 | var $connection;
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| 121 |
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| 122 | /**
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| 123 | * The DSN information for connecting to a database
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| 124 | * @var array
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| 125 | */
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| 126 | var $dsn = array();
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| 127 |
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| 128 |
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| 129 | /**
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| 130 | * Should data manipulation queries be committed automatically?
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| 131 | * @var bool
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| 132 | * @access private
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| 133 | */
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| 134 | var $autocommit = true;
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| 135 |
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| 136 | /**
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| 137 | * The quantity of transactions begun
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| 138 | *
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| 139 | * {@internal While this is private, it can't actually be designated
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| 140 | * private in PHP 5 because it is directly accessed in the test suite.}}
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| 141 | *
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| 142 | * @var integer
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| 143 | * @access private
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| 144 | */
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| 145 | var $transaction_opcount = 0;
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| 146 |
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| 147 | /**
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| 148 | * The database specified in the DSN
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| 149 | *
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| 150 | * It's a fix to allow calls to different databases in the same script.
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| 151 | *
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| 152 | * @var string
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| 153 | * @access private
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| 154 | */
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| 155 | var $_db = '';
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| 156 |
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| 157 |
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| 158 | // }}}
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| 159 | // {{{ constructor
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| 160 |
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| 161 | /**
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| 162 | * This constructor calls <kbd>$this->DB_common()</kbd>
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| 163 | *
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| 164 | * @return void
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| 165 | */
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| 166 | function DB_mysql()
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| 167 | {
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| 168 | $this->DB_common();
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| 169 | }
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| 170 |
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| 171 | // }}}
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| 172 | // {{{ connect()
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| 173 |
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| 174 | /**
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| 175 | * Connect to the database server, log in and open the database
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| 176 | *
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| 177 | * Don't call this method directly. Use DB::connect() instead.
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| 178 | *
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| 179 | * PEAR DB's mysql driver supports the following extra DSN options:
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| 180 | * + new_link If set to true, causes subsequent calls to connect()
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| 181 | * to return a new connection link instead of the
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| 182 | * existing one. WARNING: this is not portable to
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| 183 | * other DBMS's. Available since PEAR DB 1.7.0.
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| 184 | * + client_flags Any combination of MYSQL_CLIENT_* constants.
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| 185 | * Only used if PHP is at version 4.3.0 or greater.
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| 186 | * Available since PEAR DB 1.7.0.
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| 187 | *
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| 188 | * @param array $dsn the data source name
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| 189 | * @param bool $persistent should the connection be persistent?
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| 190 | *
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| 191 | * @return int DB_OK on success. A DB_Error object on failure.
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| 192 | */
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| 193 | function connect($dsn, $persistent = false)
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| 194 | {
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| 195 | if (!PEAR::loadExtension('mysql')) {
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| 196 | return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
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| 197 | }
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| 198 |
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| 199 | $this->dsn = $dsn;
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| 200 | if ($dsn['dbsyntax']) {
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| 201 | $this->dbsyntax = $dsn['dbsyntax'];
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| 202 | }
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| 203 |
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| 204 | $params = array();
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| 205 | if ($dsn['protocol'] && $dsn['protocol'] == 'unix') {
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| 206 | $params[0] = ':' . $dsn['socket'];
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| 207 | } else {
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| 208 | $params[0] = $dsn['hostspec'] ? $dsn['hostspec']
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| 209 | : 'localhost';
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| 210 | if ($dsn['port']) {
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| 211 | $params[0] .= ':' . $dsn['port'];
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| 212 | }
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| 213 | }
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| 214 | $params[] = $dsn['username'] ? $dsn['username'] : null;
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| 215 | $params[] = $dsn['password'] ? $dsn['password'] : null;
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| 216 |
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| 217 | if (!$persistent) {
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| 218 | if (isset($dsn['new_link'])
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| 219 | && ($dsn['new_link'] == 'true' || $dsn['new_link'] === true))
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| 220 | {
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| 221 | $params[] = true;
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| 222 | } else {
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| 223 | $params[] = false;
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| 224 | }
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| 225 | }
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| 226 | if (version_compare(phpversion(), '4.3.0', '>=')) {
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| 227 | $params[] = isset($dsn['client_flags'])
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| 228 | ? $dsn['client_flags'] : null;
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| 229 | }
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| 230 |
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| 231 | $connect_function = $persistent ? 'mysql_pconnect' : 'mysql_connect';
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| 232 |
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| 233 | $ini = ini_get('track_errors');
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| 234 | $php_errormsg = '';
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| 235 | if ($ini) {
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| 236 | $this->connection = @call_user_func_array($connect_function,
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| 237 | $params);
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| 238 | } else {
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| 239 | ini_set('track_errors', 1);
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| 240 | $this->connection = @call_user_func_array($connect_function,
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| 241 | $params);
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| 242 | ini_set('track_errors', $ini);
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| 243 | }
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| 244 |
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| 245 | if (!$this->connection) {
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| 246 | if (($err = @mysql_error()) != '') {
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| 247 | return $this->raiseError(DB_ERROR_CONNECT_FAILED,
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| 248 | null, null, null,
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| 249 | $err);
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| 250 | } else {
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| 251 | return $this->raiseError(DB_ERROR_CONNECT_FAILED,
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| 252 | null, null, null,
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| 253 | $php_errormsg);
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| 254 | }
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| 255 | }
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| 256 |
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| 257 | if ($dsn['database']) {
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| 258 | if (!@mysql_select_db($dsn['database'], $this->connection)) {
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| 259 | return $this->mysqlRaiseError();
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| 260 | }
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| 261 | $this->_db = $dsn['database'];
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| 262 | }
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| 263 |
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| 264 | return DB_OK;
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| 265 | }
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| 266 |
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| 267 | // }}}
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| 268 | // {{{ disconnect()
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| 269 |
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| 270 | /**
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| 271 | * Disconnects from the database server
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| 272 | *
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| 273 | * @return bool TRUE on success, FALSE on failure
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| 274 | */
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| 275 | function disconnect()
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| 276 | {
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| 277 | $ret = @mysql_close($this->connection);
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| 278 | $this->connection = null;
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| 279 | return $ret;
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| 280 | }
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| 281 |
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| 282 | // }}}
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| 283 | // {{{ simpleQuery()
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| 284 |
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| 285 | /**
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| 286 | * Sends a query to the database server
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| 287 | *
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| 288 | * Generally uses mysql_query(). If you want to use
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| 289 | * mysql_unbuffered_query() set the "result_buffering" option to 0 using
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| 290 | * setOptions(). This option was added in Release 1.7.0.
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| 291 | *
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| 292 | * @param string the SQL query string
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| 293 | *
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| 294 | * @return mixed + a PHP result resrouce for successful SELECT queries
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| 295 | * + the DB_OK constant for other successful queries
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| 296 | * + a DB_Error object on failure
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| 297 | */
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| 298 | function simpleQuery($query)
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| 299 | {
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| 300 | $ismanip = DB::isManip($query);
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| 301 | $this->last_query = $query;
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| 302 | $query = $this->modifyQuery($query);
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| 303 | if ($this->_db) {
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| 304 | if (!@mysql_select_db($this->_db, $this->connection)) {
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| 305 | return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED);
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| 306 | }
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| 307 | }
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| 308 | if (!$this->autocommit && $ismanip) {
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| 309 | if ($this->transaction_opcount == 0) {
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| 310 | $result = @mysql_query('SET AUTOCOMMIT=0', $this->connection);
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| 311 | $result = @mysql_query('BEGIN', $this->connection);
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| 312 | if (!$result) {
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| 313 | return $this->mysqlRaiseError();
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| 314 | }
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| 315 | }
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| 316 | $this->transaction_opcount++;
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| 317 | }
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| 318 | if (!$this->options['result_buffering']) {
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| 319 | $result = @mysql_unbuffered_query($query, $this->connection);
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| 320 | } else {
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| 321 | $result = @mysql_query($query, $this->connection);
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| 322 | }
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| 323 | if (!$result) {
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| 324 | return $this->mysqlRaiseError();
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| 325 | }
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| 326 | if (is_resource($result)) {
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| 327 | return $result;
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| 328 | }
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| 329 | return DB_OK;
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| 330 | }
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| 331 |
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| 332 | // }}}
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| 333 | // {{{ nextResult()
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| 334 |
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| 335 | /**
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| 336 | * Move the internal mysql result pointer to the next available result
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| 337 | *
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| 338 | * This method has not been implemented yet.
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| 339 | *
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| 340 | * @param a valid sql result resource
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| 341 | *
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| 342 | * @return false
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| 343 | */
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| 344 | function nextResult($result)
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| 345 | {
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| 346 | return false;
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| 347 | }
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| 348 |
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| 349 | // }}}
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| 350 | // {{{ fetchInto()
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| 351 |
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| 352 | /**
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| 353 | * Places a row from the result set into the given array
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| 354 | *
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| 355 | * Formating of the array and the data therein are configurable.
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| 356 | * See DB_result::fetchInto() for more information.
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| 357 | *
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| 358 | * This method is not meant to be called directly. Use
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| 359 | * DB_result::fetchInto() instead. It can't be declared "protected"
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| 360 | * because DB_result is a separate object.
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| 361 | *
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| 362 | * @param resource $result the query result resource
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| 363 | * @param array $arr the referenced array to put the data in
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| 364 | * @param int $fetchmode how the resulting array should be indexed
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| 365 | * @param int $rownum the row number to fetch (0 = first row)
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| 366 | *
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| 367 | * @return mixed DB_OK on success, NULL when the end of a result set is
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| 368 | * reached or on failure
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| 369 | *
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| 370 | * @see DB_result::fetchInto()
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| 371 | */
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| 372 | function fetchInto($result, &$arr, $fetchmode, $rownum = null)
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| 373 | {
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| 374 | if ($rownum !== null) {
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| 375 | if (!@mysql_data_seek($result, $rownum)) {
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| 376 | return null;
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| 377 | }
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| 378 | }
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| 379 | if ($fetchmode & DB_FETCHMODE_ASSOC) {
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| 380 | $arr = @mysql_fetch_array($result, MYSQL_ASSOC);
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| 381 | if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {
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| 382 | $arr = array_change_key_case($arr, CASE_LOWER);
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| 383 | }
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| 384 | } else {
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| 385 | $arr = @mysql_fetch_row($result);
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| 386 | }
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| 387 | if (!$arr) {
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| 388 | return null;
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| 389 | }
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| 390 | if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {
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| 391 | /*
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| 392 | * Even though this DBMS already trims output, we do this because
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| 393 | * a field might have intentional whitespace at the end that
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| 394 | * gets removed by DB_PORTABILITY_RTRIM under another driver.
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| 395 | */
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| 396 | $this->_rtrimArrayValues($arr);
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| 397 | }
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| 398 | if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) {
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| 399 | $this->_convertNullArrayValuesToEmpty($arr);
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| 400 | }
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| 401 | return DB_OK;
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| 402 | }
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| 403 |
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| 404 | // }}}
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| 405 | // {{{ freeResult()
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| 406 |
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| 407 | /**
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| 408 | * Deletes the result set and frees the memory occupied by the result set
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| 409 | *
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| 410 | * This method is not meant to be called directly. Use
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| 411 | * DB_result::free() instead. It can't be declared "protected"
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| 412 | * because DB_result is a separate object.
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| 413 | *
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| 414 | * @param resource $result PHP's query result resource
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| 415 | *
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| 416 | * @return bool TRUE on success, FALSE if $result is invalid
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| 417 | *
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| 418 | * @see DB_result::free()
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| 419 | */
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| 420 | function freeResult($result)
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| 421 | {
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| 422 | return @mysql_free_result($result);
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| 423 | }
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| 424 |
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| 425 | // }}}
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| 426 | // {{{ numCols()
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| 427 |
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| 428 | /**
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| 429 | * Gets the number of columns in a result set
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| 430 | *
|
|---|
| 431 | * This method is not meant to be called directly. Use
|
|---|
| 432 | * DB_result::numCols() instead. It can't be declared "protected"
|
|---|
| 433 | * because DB_result is a separate object.
|
|---|
| 434 | *
|
|---|
| 435 | * @param resource $result PHP's query result resource
|
|---|
| 436 | *
|
|---|
| 437 | * @return int the number of columns. A DB_Error object on failure.
|
|---|
| 438 | *
|
|---|
| 439 | * @see DB_result::numCols()
|
|---|
| 440 | */
|
|---|
| 441 | function numCols($result)
|
|---|
| 442 | {
|
|---|
| 443 | $cols = @mysql_num_fields($result);
|
|---|
| 444 | if (!$cols) {
|
|---|
| 445 | return $this->mysqlRaiseError();
|
|---|
| 446 | }
|
|---|
| 447 | return $cols;
|
|---|
| 448 | }
|
|---|
| 449 |
|
|---|
| 450 | // }}}
|
|---|
| 451 | // {{{ numRows()
|
|---|
| 452 |
|
|---|
| 453 | /**
|
|---|
| 454 | * Gets the number of rows in a result set
|
|---|
| 455 | *
|
|---|
| 456 | * This method is not meant to be called directly. Use
|
|---|
| 457 | * DB_result::numRows() instead. It can't be declared "protected"
|
|---|
| 458 | * because DB_result is a separate object.
|
|---|
| 459 | *
|
|---|
| 460 | * @param resource $result PHP's query result resource
|
|---|
| 461 | *
|
|---|
| 462 | * @return int the number of rows. A DB_Error object on failure.
|
|---|
| 463 | *
|
|---|
| 464 | * @see DB_result::numRows()
|
|---|
| 465 | */
|
|---|
| 466 | function numRows($result)
|
|---|
| 467 | {
|
|---|
| 468 | $rows = @mysql_num_rows($result);
|
|---|
| 469 | if ($rows === null) {
|
|---|
| 470 | return $this->mysqlRaiseError();
|
|---|
| 471 | }
|
|---|
| 472 | return $rows;
|
|---|
| 473 | }
|
|---|
| 474 |
|
|---|
| 475 | // }}}
|
|---|
| 476 | // {{{ autoCommit()
|
|---|
| 477 |
|
|---|
| 478 | /**
|
|---|
| 479 | * Enables or disables automatic commits
|
|---|
| 480 | *
|
|---|
| 481 | * @param bool $onoff true turns it on, false turns it off
|
|---|
| 482 | *
|
|---|
| 483 | * @return int DB_OK on success. A DB_Error object if the driver
|
|---|
| 484 | * doesn't support auto-committing transactions.
|
|---|
| 485 | */
|
|---|
| 486 | function autoCommit($onoff = false)
|
|---|
| 487 | {
|
|---|
| 488 | // XXX if $this->transaction_opcount > 0, we should probably
|
|---|
| 489 | // issue a warning here.
|
|---|
| 490 | $this->autocommit = $onoff ? true : false;
|
|---|
| 491 | return DB_OK;
|
|---|
| 492 | }
|
|---|
| 493 |
|
|---|
| 494 | // }}}
|
|---|
| 495 | // {{{ commit()
|
|---|
| 496 |
|
|---|
| 497 | /**
|
|---|
| 498 | * Commits the current transaction
|
|---|
| 499 | *
|
|---|
| 500 | * @return int DB_OK on success. A DB_Error object on failure.
|
|---|
| 501 | */
|
|---|
| 502 | function commit()
|
|---|
| 503 | {
|
|---|
| 504 | if ($this->transaction_opcount > 0) {
|
|---|
| 505 | if ($this->_db) {
|
|---|
| 506 | if (!@mysql_select_db($this->_db, $this->connection)) {
|
|---|
| 507 | return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED);
|
|---|
| 508 | }
|
|---|
| 509 | }
|
|---|
| 510 | $result = @mysql_query('COMMIT', $this->connection);
|
|---|
| 511 | $result = @mysql_query('SET AUTOCOMMIT=1', $this->connection);
|
|---|
| 512 | $this->transaction_opcount = 0;
|
|---|
| 513 | if (!$result) {
|
|---|
| 514 | return $this->mysqlRaiseError();
|
|---|
| 515 | }
|
|---|
| 516 | }
|
|---|
| 517 | return DB_OK;
|
|---|
| 518 | }
|
|---|
| 519 |
|
|---|
| 520 | // }}}
|
|---|
| 521 | // {{{ rollback()
|
|---|
| 522 |
|
|---|
| 523 | /**
|
|---|
| 524 | * Reverts the current transaction
|
|---|
| 525 | *
|
|---|
| 526 | * @return int DB_OK on success. A DB_Error object on failure.
|
|---|
| 527 | */
|
|---|
| 528 | function rollback()
|
|---|
| 529 | {
|
|---|
| 530 | if ($this->transaction_opcount > 0) {
|
|---|
| 531 | if ($this->_db) {
|
|---|
| 532 | if (!@mysql_select_db($this->_db, $this->connection)) {
|
|---|
| 533 | return $this->mysqlRaiseError(DB_ERROR_NODBSELECTED);
|
|---|
| 534 | }
|
|---|
| 535 | }
|
|---|
| 536 | $result = @mysql_query('ROLLBACK', $this->connection);
|
|---|
| 537 | $result = @mysql_query('SET AUTOCOMMIT=1', $this->connection);
|
|---|
| 538 | $this->transaction_opcount = 0;
|
|---|
| 539 | if (!$result) {
|
|---|
| 540 | return $this->mysqlRaiseError();
|
|---|
| 541 | }
|
|---|
| 542 | }
|
|---|
| 543 | return DB_OK;
|
|---|
| 544 | }
|
|---|
| 545 |
|
|---|
| 546 | // }}}
|
|---|
| 547 | // {{{ affectedRows()
|
|---|
| 548 |
|
|---|
| 549 | /**
|
|---|
| 550 | * Determines the number of rows affected by a data maniuplation query
|
|---|
| 551 | *
|
|---|
| 552 | * 0 is returned for queries that don't manipulate data.
|
|---|
| 553 | *
|
|---|
| 554 | * @return int the number of rows. A DB_Error object on failure.
|
|---|
| 555 | */
|
|---|
| 556 | function affectedRows()
|
|---|
| 557 | {
|
|---|
| 558 | if (DB::isManip($this->last_query)) {
|
|---|
| 559 | return @mysql_affected_rows($this->connection);
|
|---|
| 560 | } else {
|
|---|
| 561 | return 0;
|
|---|
| 562 | }
|
|---|
| 563 | }
|
|---|
| 564 |
|
|---|
| 565 | // }}}
|
|---|
| 566 | // {{{ nextId()
|
|---|
| 567 |
|
|---|
| 568 | /**
|
|---|
| 569 | * Returns the next free id in a sequence
|
|---|
| 570 | *
|
|---|
| 571 | * @param string $seq_name name of the sequence
|
|---|
| 572 | * @param boolean $ondemand when true, the seqence is automatically
|
|---|
| 573 | * created if it does not exist
|
|---|
| 574 | *
|
|---|
| 575 | * @return int the next id number in the sequence.
|
|---|
| 576 | * A DB_Error object on failure.
|
|---|
| 577 | *
|
|---|
| 578 | * @see DB_common::nextID(), DB_common::getSequenceName(),
|
|---|
| 579 | * DB_mysql::createSequence(), DB_mysql::dropSequence()
|
|---|
| 580 | */
|
|---|
| 581 | function nextId($seq_name, $ondemand = true)
|
|---|
| 582 | {
|
|---|
| 583 | $seqname = $this->getSequenceName($seq_name);
|
|---|
| 584 | do {
|
|---|
| 585 | $repeat = 0;
|
|---|
| 586 | $this->pushErrorHandling(PEAR_ERROR_RETURN);
|
|---|
| 587 | $result = $this->query("UPDATE ${seqname} ".
|
|---|
| 588 | 'SET id=LAST_INSERT_ID(id+1)');
|
|---|
| 589 | $this->popErrorHandling();
|
|---|
| 590 | if ($result === DB_OK) {
|
|---|
| 591 | // COMMON CASE
|
|---|
| 592 | $id = @mysql_insert_id($this->connection);
|
|---|
| 593 | if ($id != 0) {
|
|---|
| 594 | return $id;
|
|---|
| 595 | }
|
|---|
| 596 | // EMPTY SEQ TABLE
|
|---|
| 597 | // Sequence table must be empty for some reason, so fill
|
|---|
| 598 | // it and return 1 and obtain a user-level lock
|
|---|
| 599 | $result = $this->getOne("SELECT GET_LOCK('${seqname}_lock',10)");
|
|---|
| 600 | if (DB::isError($result)) {
|
|---|
| 601 | return $this->raiseError($result);
|
|---|
| 602 | }
|
|---|
| 603 | if ($result == 0) {
|
|---|
| 604 | // Failed to get the lock
|
|---|
| 605 | return $this->mysqlRaiseError(DB_ERROR_NOT_LOCKED);
|
|---|
| 606 | }
|
|---|
| 607 |
|
|---|
| 608 | // add the default value
|
|---|
| 609 | $result = $this->query("REPLACE INTO ${seqname} (id) VALUES (0)");
|
|---|
| 610 | if (DB::isError($result)) {
|
|---|
| 611 | return $this->raiseError($result);
|
|---|
| 612 | }
|
|---|
| 613 |
|
|---|
| 614 | // Release the lock
|
|---|
| 615 | $result = $this->getOne('SELECT RELEASE_LOCK('
|
|---|
| 616 | . "'${seqname}_lock')");
|
|---|
| 617 | if (DB::isError($result)) {
|
|---|
| 618 | return $this->raiseError($result);
|
|---|
| 619 | }
|
|---|
| 620 | // We know what the result will be, so no need to try again
|
|---|
| 621 | return 1;
|
|---|
| 622 |
|
|---|
| 623 | } elseif ($ondemand && DB::isError($result) &&
|
|---|
| 624 | $result->getCode() == DB_ERROR_NOSUCHTABLE)
|
|---|
| 625 | {
|
|---|
| 626 | // ONDEMAND TABLE CREATION
|
|---|
| 627 | $result = $this->createSequence($seq_name);
|
|---|
| 628 | if (DB::isError($result)) {
|
|---|
| 629 | return $this->raiseError($result);
|
|---|
| 630 | } else {
|
|---|
| 631 | $repeat = 1;
|
|---|
| 632 | }
|
|---|
| 633 |
|
|---|
| 634 | } elseif (DB::isError($result) &&
|
|---|
| 635 | $result->getCode() == DB_ERROR_ALREADY_EXISTS)
|
|---|
| 636 | {
|
|---|
| 637 | // BACKWARDS COMPAT
|
|---|
| 638 | // see _BCsequence() comment
|
|---|
| 639 | $result = $this->_BCsequence($seqname);
|
|---|
| 640 | if (DB::isError($result)) {
|
|---|
| 641 | return $this->raiseError($result);
|
|---|
| 642 | }
|
|---|
| 643 | $repeat = 1;
|
|---|
| 644 | }
|
|---|
| 645 | } while ($repeat);
|
|---|
| 646 |
|
|---|
| 647 | return $this->raiseError($result);
|
|---|
| 648 | }
|
|---|
| 649 |
|
|---|
| 650 | // }}}
|
|---|
| 651 | // {{{ createSequence()
|
|---|
| 652 |
|
|---|
| 653 | /**
|
|---|
| 654 | * Creates a new sequence
|
|---|
| 655 | *
|
|---|
| 656 | * @param string $seq_name name of the new sequence
|
|---|
| 657 | *
|
|---|
| 658 | * @return int DB_OK on success. A DB_Error object on failure.
|
|---|
| 659 | *
|
|---|
| 660 | * @see DB_common::createSequence(), DB_common::getSequenceName(),
|
|---|
| 661 | * DB_mysql::nextID(), DB_mysql::dropSequence()
|
|---|
| 662 | */
|
|---|
| 663 | function createSequence($seq_name)
|
|---|
| 664 | {
|
|---|
| 665 | $seqname = $this->getSequenceName($seq_name);
|
|---|
| 666 | $res = $this->query('CREATE TABLE ' . $seqname
|
|---|
| 667 | . ' (id INTEGER UNSIGNED AUTO_INCREMENT NOT NULL,'
|
|---|
| 668 | . ' PRIMARY KEY(id))');
|
|---|
| 669 | if (DB::isError($res)) {
|
|---|
| 670 | return $res;
|
|---|
| 671 | }
|
|---|
| 672 | // insert yields value 1, nextId call will generate ID 2
|
|---|
| 673 | $res = $this->query("INSERT INTO ${seqname} (id) VALUES (0)");
|
|---|
| 674 | if (DB::isError($res)) {
|
|---|
| 675 | return $res;
|
|---|
| 676 | }
|
|---|
| 677 | // so reset to zero
|
|---|
| 678 | return $this->query("UPDATE ${seqname} SET id = 0");
|
|---|
| 679 | }
|
|---|
| 680 |
|
|---|
| 681 | // }}}
|
|---|
| 682 | // {{{ dropSequence()
|
|---|
| 683 |
|
|---|
| 684 | /**
|
|---|
| 685 | * Deletes a sequence
|
|---|
| 686 | *
|
|---|
| 687 | * @param string $seq_name name of the sequence to be deleted
|
|---|
| 688 | *
|
|---|
| 689 | * @return int DB_OK on success. A DB_Error object on failure.
|
|---|
| 690 | *
|
|---|
| 691 | * @see DB_common::dropSequence(), DB_common::getSequenceName(),
|
|---|
| 692 | * DB_mysql::nextID(), DB_mysql::createSequence()
|
|---|
| 693 | */
|
|---|
| 694 | function dropSequence($seq_name)
|
|---|
| 695 | {
|
|---|
| 696 | return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name));
|
|---|
| 697 | }
|
|---|
| 698 |
|
|---|
| 699 | // }}}
|
|---|
| 700 | // {{{ _BCsequence()
|
|---|
| 701 |
|
|---|
| 702 | /**
|
|---|
| 703 | * Backwards compatibility with old sequence emulation implementation
|
|---|
| 704 | * (clean up the dupes)
|
|---|
| 705 | *
|
|---|
| 706 | * @param string $seqname the sequence name to clean up
|
|---|
| 707 | *
|
|---|
| 708 | * @return bool true on success. A DB_Error object on failure.
|
|---|
| 709 | *
|
|---|
| 710 | * @access private
|
|---|
| 711 | */
|
|---|
| 712 | function _BCsequence($seqname)
|
|---|
| 713 | {
|
|---|
| 714 | // Obtain a user-level lock... this will release any previous
|
|---|
| 715 | // application locks, but unlike LOCK TABLES, it does not abort
|
|---|
| 716 | // the current transaction and is much less frequently used.
|
|---|
| 717 | $result = $this->getOne("SELECT GET_LOCK('${seqname}_lock',10)");
|
|---|
| 718 | if (DB::isError($result)) {
|
|---|
| 719 | return $result;
|
|---|
| 720 | }
|
|---|
| 721 | if ($result == 0) {
|
|---|
| 722 | // Failed to get the lock, can't do the conversion, bail
|
|---|
| 723 | // with a DB_ERROR_NOT_LOCKED error
|
|---|
| 724 | return $this->mysqlRaiseError(DB_ERROR_NOT_LOCKED);
|
|---|
| 725 | }
|
|---|
| 726 |
|
|---|
| 727 | $highest_id = $this->getOne("SELECT MAX(id) FROM ${seqname}");
|
|---|
| 728 | if (DB::isError($highest_id)) {
|
|---|
| 729 | return $highest_id;
|
|---|
| 730 | }
|
|---|
| 731 | // This should kill all rows except the highest
|
|---|
| 732 | // We should probably do something if $highest_id isn't
|
|---|
| 733 | // numeric, but I'm at a loss as how to handle that...
|
|---|
| 734 | $result = $this->query('DELETE FROM ' . $seqname
|
|---|
| 735 | . " WHERE id <> $highest_id");
|
|---|
| 736 | if (DB::isError($result)) {
|
|---|
| 737 | return $result;
|
|---|
| 738 | }
|
|---|
| 739 |
|
|---|
| 740 | // If another thread has been waiting for this lock,
|
|---|
| 741 | // it will go thru the above procedure, but will have no
|
|---|
| 742 | // real effect
|
|---|
| 743 | $result = $this->getOne("SELECT RELEASE_LOCK('${seqname}_lock')");
|
|---|
| 744 | if (DB::isError($result)) {
|
|---|
| 745 | return $result;
|
|---|
| 746 | }
|
|---|
| 747 | return true;
|
|---|
| 748 | }
|
|---|
| 749 |
|
|---|
| 750 | // }}}
|
|---|
| 751 | // {{{ quoteIdentifier()
|
|---|
| 752 |
|
|---|
| 753 | /**
|
|---|
| 754 | * Quotes a string so it can be safely used as a table or column name
|
|---|
| 755 | *
|
|---|
| 756 | * MySQL can't handle the backtick character (<kbd>`</kbd>) in
|
|---|
| 757 | * table or column names.
|
|---|
| 758 | *
|
|---|
| 759 | * @param string $str identifier name to be quoted
|
|---|
| 760 | *
|
|---|
| 761 | * @return string quoted identifier string
|
|---|
| 762 | *
|
|---|
| 763 | * @see DB_common::quoteIdentifier()
|
|---|
| 764 | * @since Method available since Release 1.6.0
|
|---|
| 765 | */
|
|---|
| 766 | function quoteIdentifier($str)
|
|---|
| 767 | {
|
|---|
| 768 | return '`' . $str . '`';
|
|---|
| 769 | }
|
|---|
| 770 |
|
|---|
| 771 | // }}}
|
|---|
| 772 | // {{{ quote()
|
|---|
| 773 |
|
|---|
| 774 | /**
|
|---|
| 775 | * @deprecated Deprecated in release 1.6.0
|
|---|
| 776 | */
|
|---|
| 777 | function quote($str)
|
|---|
| 778 | {
|
|---|
| 779 | return $this->quoteSmart($str);
|
|---|
| 780 | }
|
|---|
| 781 |
|
|---|
| 782 | // }}}
|
|---|
| 783 | // {{{ escapeSimple()
|
|---|
| 784 |
|
|---|
| 785 | /**
|
|---|
| 786 | * Escapes a string according to the current DBMS's standards
|
|---|
| 787 | *
|
|---|
| 788 | * @param string $str the string to be escaped
|
|---|
| 789 | *
|
|---|
| 790 | * @return string the escaped string
|
|---|
| 791 | *
|
|---|
| 792 | * @see DB_common::quoteSmart()
|
|---|
| 793 | * @since Method available since Release 1.6.0
|
|---|
| 794 | */
|
|---|
| 795 | function escapeSimple($str)
|
|---|
| 796 | {
|
|---|
| 797 | if (function_exists('mysql_real_escape_string')) {
|
|---|
| 798 | return @mysql_real_escape_string($str, $this->connection);
|
|---|
| 799 | } else {
|
|---|
| 800 | return @mysql_escape_string($str);
|
|---|
| 801 | }
|
|---|
| 802 | }
|
|---|
| 803 |
|
|---|
| 804 | // }}}
|
|---|
| 805 | // {{{ modifyQuery()
|
|---|
| 806 |
|
|---|
| 807 | /**
|
|---|
| 808 | * Changes a query string for various DBMS specific reasons
|
|---|
| 809 | *
|
|---|
| 810 | * This little hack lets you know how many rows were deleted
|
|---|
| 811 | * when running a "DELETE FROM table" query. Only implemented
|
|---|
| 812 | * if the DB_PORTABILITY_DELETE_COUNT portability option is on.
|
|---|
| 813 | *
|
|---|
| 814 | * @param string $query the query string to modify
|
|---|
| 815 | *
|
|---|
| 816 | * @return string the modified query string
|
|---|
| 817 | *
|
|---|
| 818 | * @access protected
|
|---|
| 819 | * @see DB_common::setOption()
|
|---|
| 820 | */
|
|---|
| 821 | function modifyQuery($query)
|
|---|
| 822 | {
|
|---|
| 823 | if ($this->options['portability'] & DB_PORTABILITY_DELETE_COUNT) {
|
|---|
| 824 | // "DELETE FROM table" gives 0 affected rows in MySQL.
|
|---|
| 825 | // This little hack lets you know how many rows were deleted.
|
|---|
| 826 | if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {
|
|---|
| 827 | $query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/',
|
|---|
| 828 | 'DELETE FROM \1 WHERE 1=1', $query);
|
|---|
| 829 | }
|
|---|
| 830 | }
|
|---|
| 831 | return $query;
|
|---|
| 832 | }
|
|---|
| 833 |
|
|---|
| 834 | // }}}
|
|---|
| 835 | // {{{ modifyLimitQuery()
|
|---|
| 836 |
|
|---|
| 837 | /**
|
|---|
| 838 | * Adds LIMIT clauses to a query string according to current DBMS standards
|
|---|
| 839 | *
|
|---|
| 840 | * @param string $query the query to modify
|
|---|
| 841 | * @param int $from the row to start to fetching (0 = the first row)
|
|---|
| 842 | * @param int $count the numbers of rows to fetch
|
|---|
| 843 | * @param mixed $params array, string or numeric data to be used in
|
|---|
| 844 | * execution of the statement. Quantity of items
|
|---|
| 845 | * passed must match quantity of placeholders in
|
|---|
| 846 | * query: meaning 1 placeholder for non-array
|
|---|
| 847 | * parameters or 1 placeholder per array element.
|
|---|
| 848 | *
|
|---|
| 849 | * @return string the query string with LIMIT clauses added
|
|---|
| 850 | *
|
|---|
| 851 | * @access protected
|
|---|
| 852 | */
|
|---|
| 853 | function modifyLimitQuery($query, $from, $count, $params = array())
|
|---|
| 854 | {
|
|---|
| 855 | if (DB::isManip($query)) {
|
|---|
| 856 | return $query . " LIMIT $count";
|
|---|
| 857 | } else {
|
|---|
| 858 | return $query . " LIMIT $from, $count";
|
|---|
| 859 | }
|
|---|
| 860 | }
|
|---|
| 861 |
|
|---|
| 862 | // }}}
|
|---|
| 863 | // {{{ mysqlRaiseError()
|
|---|
| 864 |
|
|---|
| 865 | /**
|
|---|
| 866 | * Produces a DB_Error object regarding the current problem
|
|---|
| 867 | *
|
|---|
| 868 | * @param int $errno if the error is being manually raised pass a
|
|---|
| 869 | * DB_ERROR* constant here. If this isn't passed
|
|---|
| 870 | * the error information gathered from the DBMS.
|
|---|
| 871 | *
|
|---|
| 872 | * @return object the DB_Error object
|
|---|
| 873 | *
|
|---|
| 874 | * @see DB_common::raiseError(),
|
|---|
| 875 | * DB_mysql::errorNative(), DB_common::errorCode()
|
|---|
| 876 | */
|
|---|
| 877 | function mysqlRaiseError($errno = null)
|
|---|
| 878 | {
|
|---|
| 879 | if ($errno === null) {
|
|---|
| 880 | if ($this->options['portability'] & DB_PORTABILITY_ERRORS) {
|
|---|
| 881 | $this->errorcode_map[1022] = DB_ERROR_CONSTRAINT;
|
|---|
| 882 | $this->errorcode_map[1048] = DB_ERROR_CONSTRAINT_NOT_NULL;
|
|---|
| 883 | $this->errorcode_map[1062] = DB_ERROR_CONSTRAINT;
|
|---|
| 884 | } else {
|
|---|
| 885 | // Doing this in case mode changes during runtime.
|
|---|
| 886 | $this->errorcode_map[1022] = DB_ERROR_ALREADY_EXISTS;
|
|---|
| 887 | $this->errorcode_map[1048] = DB_ERROR_CONSTRAINT;
|
|---|
| 888 | $this->errorcode_map[1062] = DB_ERROR_ALREADY_EXISTS;
|
|---|
| 889 | }
|
|---|
| 890 | $errno = $this->errorCode(mysql_errno($this->connection));
|
|---|
| 891 | }
|
|---|
| 892 | return $this->raiseError($errno, null, null, null,
|
|---|
| 893 | @mysql_errno($this->connection) . ' ** ' .
|
|---|
| 894 | @mysql_error($this->connection));
|
|---|
| 895 | }
|
|---|
| 896 |
|
|---|
| 897 | // }}}
|
|---|
| 898 | // {{{ errorNative()
|
|---|
| 899 |
|
|---|
| 900 | /**
|
|---|
| 901 | * Gets the DBMS' native error code produced by the last query
|
|---|
| 902 | *
|
|---|
| 903 | * @return int the DBMS' error code
|
|---|
| 904 | */
|
|---|
| 905 | function errorNative()
|
|---|
| 906 | {
|
|---|
| 907 | return @mysql_errno($this->connection);
|
|---|
| 908 | }
|
|---|
| 909 |
|
|---|
| 910 | // }}}
|
|---|
| 911 | // {{{ tableInfo()
|
|---|
| 912 |
|
|---|
| 913 | /**
|
|---|
| 914 | * Returns information about a table or a result set
|
|---|
| 915 | *
|
|---|
| 916 | * @param object|string $result DB_result object from a query or a
|
|---|
| 917 | * string containing the name of a table.
|
|---|
| 918 | * While this also accepts a query result
|
|---|
| 919 | * resource identifier, this behavior is
|
|---|
| 920 | * deprecated.
|
|---|
| 921 | * @param int $mode a valid tableInfo mode
|
|---|
| 922 | *
|
|---|
| 923 | * @return array an associative array with the information requested.
|
|---|
| 924 | * A DB_Error object on failure.
|
|---|
| 925 | *
|
|---|
| 926 | * @see DB_common::tableInfo()
|
|---|
| 927 | */
|
|---|
| 928 | function tableInfo($result, $mode = null)
|
|---|
| 929 | {
|
|---|
| 930 | if (is_string($result)) {
|
|---|
| 931 | /*
|
|---|
| 932 | * Probably received a table name.
|
|---|
| 933 | * Create a result resource identifier.
|
|---|
| 934 | */
|
|---|
| 935 | $id = @mysql_list_fields($this->dsn['database'],
|
|---|
| 936 | $result, $this->connection);
|
|---|
| 937 | $got_string = true;
|
|---|
| 938 | } elseif (isset($result->result)) {
|
|---|
| 939 | /*
|
|---|
| 940 | * Probably received a result object.
|
|---|
| 941 | * Extract the result resource identifier.
|
|---|
| 942 | */
|
|---|
| 943 | $id = $result->result;
|
|---|
| 944 | $got_string = false;
|
|---|
| 945 | } else {
|
|---|
| 946 | /*
|
|---|
| 947 | * Probably received a result resource identifier.
|
|---|
| 948 | * Copy it.
|
|---|
| 949 | * Deprecated. Here for compatibility only.
|
|---|
| 950 | */
|
|---|
| 951 | $id = $result;
|
|---|
| 952 | $got_string = false;
|
|---|
| 953 | }
|
|---|
| 954 |
|
|---|
| 955 | if (!is_resource($id)) {
|
|---|
| 956 | return $this->mysqlRaiseError(DB_ERROR_NEED_MORE_DATA);
|
|---|
| 957 | }
|
|---|
| 958 |
|
|---|
| 959 | if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
|
|---|
| 960 | $case_func = 'strtolower';
|
|---|
| 961 | } else {
|
|---|
| 962 | $case_func = 'strval';
|
|---|
| 963 | }
|
|---|
| 964 |
|
|---|
| 965 | $count = @mysql_num_fields($id);
|
|---|
| 966 | $res = array();
|
|---|
| 967 |
|
|---|
| 968 | if ($mode) {
|
|---|
| 969 | $res['num_fields'] = $count;
|
|---|
| 970 | }
|
|---|
| 971 |
|
|---|
| 972 | for ($i = 0; $i < $count; $i++) {
|
|---|
| 973 | $res[$i] = array(
|
|---|
| 974 | 'table' => $case_func(@mysql_field_table($id, $i)),
|
|---|
| 975 | 'name' => $case_func(@mysql_field_name($id, $i)),
|
|---|
| 976 | 'type' => @mysql_field_type($id, $i),
|
|---|
| 977 | 'len' => @mysql_field_len($id, $i),
|
|---|
| 978 | 'flags' => @mysql_field_flags($id, $i),
|
|---|
| 979 | );
|
|---|
| 980 | if ($mode & DB_TABLEINFO_ORDER) {
|
|---|
| 981 | $res['order'][$res[$i]['name']] = $i;
|
|---|
| 982 | }
|
|---|
| 983 | if ($mode & DB_TABLEINFO_ORDERTABLE) {
|
|---|
| 984 | $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
|
|---|
| 985 | }
|
|---|
| 986 | }
|
|---|
| 987 |
|
|---|
| 988 | // free the result only if we were called on a table
|
|---|
| 989 | if ($got_string) {
|
|---|
| 990 | @mysql_free_result($id);
|
|---|
| 991 | }
|
|---|
| 992 | return $res;
|
|---|
| 993 | }
|
|---|
| 994 |
|
|---|
| 995 | // }}}
|
|---|
| 996 | // {{{ getSpecialQuery()
|
|---|
| 997 |
|
|---|
| 998 | /**
|
|---|
| 999 | * Obtains the query string needed for listing a given type of objects
|
|---|
| 1000 | *
|
|---|
| 1001 | * @param string $type the kind of objects you want to retrieve
|
|---|
| 1002 | *
|
|---|
| 1003 | * @return string the SQL query string or null if the driver doesn't
|
|---|
| 1004 | * support the object type requested
|
|---|
| 1005 | *
|
|---|
| 1006 | * @access protected
|
|---|
| 1007 | * @see DB_common::getListOf()
|
|---|
| 1008 | */
|
|---|
| 1009 | function getSpecialQuery($type)
|
|---|
| 1010 | {
|
|---|
| 1011 | switch ($type) {
|
|---|
| 1012 | case 'tables':
|
|---|
| 1013 | return 'SHOW TABLES';
|
|---|
| 1014 | case 'users':
|
|---|
| 1015 | return 'SELECT DISTINCT User FROM mysql.user';
|
|---|
| 1016 | case 'databases':
|
|---|
| 1017 | return 'SHOW DATABASES';
|
|---|
| 1018 | default:
|
|---|
| 1019 | return null;
|
|---|
| 1020 | }
|
|---|
| 1021 | }
|
|---|
| 1022 |
|
|---|
| 1023 | // }}}
|
|---|
| 1024 |
|
|---|
| 1025 | }
|
|---|
| 1026 |
|
|---|
| 1027 | /*
|
|---|
| 1028 | * Local variables:
|
|---|
| 1029 | * tab-width: 4
|
|---|
| 1030 | * c-basic-offset: 4
|
|---|
| 1031 | * End:
|
|---|
| 1032 | */
|
|---|
| 1033 |
|
|---|
| 1034 | ?> |
|---|