| commit | author | age | ||
| c9462d | 1 | <?php |
| S | 2 | // vim: set et ts=4 sw=4 fdm=marker: |
| 3 | // +----------------------------------------------------------------------+ | |
| 4 | // | PHP versions 4 and 5 | | |
| 5 | // +----------------------------------------------------------------------+ | |
| 6 | // | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, | | |
| 7 | // | Stig. S. Bakken, Lukas Smith | | |
| 8 | // | All rights reserved. | | |
| 9 | // +----------------------------------------------------------------------+ | |
| 10 | // | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB | | |
| 11 | // | API as well as database abstraction for PHP applications. | | |
| 12 | // | This LICENSE is in the BSD license style. | | |
| 13 | // | | | |
| 14 | // | Redistribution and use in source and binary forms, with or without | | |
| 15 | // | modification, are permitted provided that the following conditions | | |
| 16 | // | are met: | | |
| 17 | // | | | |
| 18 | // | Redistributions of source code must retain the above copyright | | |
| 19 | // | notice, this list of conditions and the following disclaimer. | | |
| 20 | // | | | |
| 21 | // | Redistributions in binary form must reproduce the above copyright | | |
| 22 | // | notice, this list of conditions and the following disclaimer in the | | |
| 23 | // | documentation and/or other materials provided with the distribution. | | |
| 24 | // | | | |
| 25 | // | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, | | |
| 26 | // | Lukas Smith nor the names of his contributors may be used to endorse | | |
| 27 | // | or promote products derived from this software without specific prior| | |
| 28 | // | written permission. | | |
| 29 | // | | | |
| 30 | // | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | | |
| 31 | // | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | | |
| 32 | // | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | | |
| 33 | // | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | | |
| 34 | // | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | | |
| 35 | // | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | | |
| 36 | // | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS| | |
| 37 | // | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED | | |
| 38 | // | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | | |
| 39 | // | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY| | |
| 40 | // | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | | |
| 41 | // | POSSIBILITY OF SUCH DAMAGE. | | |
| 42 | // +----------------------------------------------------------------------+ | |
| 43 | // | Author: Lukas Smith <smith@backendmedia.com> | | |
| 44 | // +----------------------------------------------------------------------+ | |
| 45 | // | |
| 46 | // $Id$ | |
| 47 | // | |
| 48 | ||
| 49 | /** | |
| 50 | * MDB2 SQLite driver | |
| 51 | * | |
| 52 | * @package MDB2 | |
| 53 | * @category Database | |
| 54 | * @author Lukas Smith <smith@backendmedia.com> | |
| 55 | */ | |
| 56 | class MDB2_Driver_sqlite extends MDB2_Driver_Common | |
| 57 | { | |
| 58 | // {{{ properties | |
| 59 | var $escape_quotes = "'"; | |
| 60 | ||
| 61 | var $_lasterror = ''; | |
| 62 | ||
| 63 | // }}} | |
| 64 | // {{{ constructor | |
| 65 | ||
| 66 | /** | |
| 67 | * Constructor | |
| 68 | */ | |
| 69 | function __construct() | |
| 70 | { | |
| 71 | parent::__construct(); | |
| 72 | ||
| 73 | $this->phptype = 'sqlite'; | |
| 74 | $this->dbsyntax = 'sqlite'; | |
| 75 | ||
| 76 | $this->supported['sequences'] = true; | |
| 77 | $this->supported['indexes'] = true; | |
| 78 | $this->supported['affected_rows'] = true; | |
| 79 | $this->supported['summary_functions'] = true; | |
| 80 | $this->supported['order_by_text'] = true; | |
| 81 | $this->supported['current_id'] = true; | |
| 82 | $this->supported['limit_queries'] = true; | |
| 83 | $this->supported['LOBs'] = true; | |
| 84 | $this->supported['replace'] = true; | |
| 85 | $this->supported['transactions'] = true; | |
| 86 | $this->supported['sub_selects'] = true; | |
| 87 | $this->supported['auto_increment'] = true; | |
| 88 | ||
| 89 | $this->options['base_transaction_name'] = '___php_MDB2_sqlite_auto_commit_off'; | |
| 90 | $this->options['fixed_float'] = 0; | |
| 91 | $this->options['database_path'] = ''; | |
| 92 | $this->options['database_extension'] = ''; | |
| 93 | } | |
| 94 | ||
| 95 | // }}} | |
| 96 | // {{{ errorInfo() | |
| 97 | ||
| 98 | /** | |
| 99 | * This method is used to collect information about an error | |
| 100 | * | |
| 101 | * @param integer $error | |
| 102 | * @return array | |
| 103 | * @access public | |
| 104 | */ | |
| 105 | function errorInfo($error = null) | |
| 106 | { | |
| 107 | $native_code = null; | |
| 108 | if ($this->connection) { | |
| 109 | $native_code = @sqlite_last_error($this->connection); | |
| 110 | } | |
| 111 | $native_msg = @sqlite_error_string($native_code); | |
| 112 | ||
| 113 | if (is_null($error)) { | |
| 114 | static $error_regexps; | |
| 115 | if (empty($error_regexps)) { | |
| 116 | $error_regexps = array( | |
| 117 | '/^no such table:/' => MDB2_ERROR_NOSUCHTABLE, | |
| 118 | '/^no such index:/' => MDB2_ERROR_NOT_FOUND, | |
| 119 | '/^(table|index) .* already exists$/' => MDB2_ERROR_ALREADY_EXISTS, | |
| 120 | '/PRIMARY KEY must be unique/i' => MDB2_ERROR_CONSTRAINT, | |
| 121 | '/is not unique/' => MDB2_ERROR_CONSTRAINT, | |
| 122 | '/columns .* are not unique/i' => MDB2_ERROR_CONSTRAINT, | |
| 123 | '/uniqueness constraint failed/' => MDB2_ERROR_CONSTRAINT, | |
| 124 | '/may not be NULL/' => MDB2_ERROR_CONSTRAINT_NOT_NULL, | |
| 125 | '/^no such column:/' => MDB2_ERROR_NOSUCHFIELD, | |
| 126 | '/column not present in both tables/i' => MDB2_ERROR_NOSUCHFIELD, | |
| 127 | '/^near ".*": syntax error$/' => MDB2_ERROR_SYNTAX, | |
| 128 | '/[0-9]+ values for [0-9]+ columns/i' => MDB2_ERROR_VALUE_COUNT_ON_ROW, | |
| 129 | ); | |
| 130 | } | |
| 131 | foreach ($error_regexps as $regexp => $code) { | |
| 132 | if (preg_match($regexp, $this->_lasterror)) { | |
| 133 | $error = $code; | |
| 134 | break; | |
| 135 | } | |
| 136 | } | |
| 137 | } | |
| 138 | return array($error, $native_code, $native_msg); | |
| 139 | } | |
| 140 | ||
| 141 | // }}} | |
| 142 | // {{{ escape() | |
| 143 | ||
| 144 | /** | |
| 145 | * Quotes a string so it can be safely used in a query. It will quote | |
| 146 | * the text so it can safely be used within a query. | |
| 147 | * | |
| 148 | * @param string $text the input string to quote | |
| 149 | * @return string quoted string | |
| 150 | * @access public | |
| 151 | */ | |
| 152 | function escape($text) | |
| 153 | { | |
| 154 | return @sqlite_escape_string($text); | |
| 155 | } | |
| 156 | ||
| 157 | // }}} | |
| 158 | // {{{ beginTransaction() | |
| 159 | ||
| 160 | /** | |
| 161 | * Start a transaction. | |
| 162 | * | |
| 163 | * @return mixed MDB2_OK on success, a MDB2 error on failure | |
| 164 | * @access public | |
| 165 | */ | |
| 166 | function beginTransaction() | |
| 167 | { | |
| 168 | $this->debug('starting transaction', 'beginTransaction'); | |
| 169 | if ($this->in_transaction) { | |
| 170 | return MDB2_OK; //nothing to do | |
| 171 | } | |
| 172 | if (!$this->destructor_registered && $this->opened_persistent) { | |
| 173 | $this->destructor_registered = true; | |
| 174 | register_shutdown_function('MDB2_closeOpenTransactions'); | |
| 175 | } | |
| 176 | $query = 'BEGIN TRANSACTION '.$this->options['base_transaction_name']; | |
| 177 | $result = $this->_doQuery($query, true); | |
| 178 | if (PEAR::isError($result)) { | |
| 179 | return $result; | |
| 180 | } | |
| 181 | $this->in_transaction = true; | |
| 182 | return MDB2_OK; | |
| 183 | } | |
| 184 | ||
| 185 | // }}} | |
| 186 | // {{{ commit() | |
| 187 | ||
| 188 | /** | |
| 189 | * Commit the database changes done during a transaction that is in | |
| 190 | * progress. | |
| 191 | * | |
| 192 | * @return mixed MDB2_OK on success, a MDB2 error on failure | |
| 193 | * @access public | |
| 194 | */ | |
| 195 | function commit() | |
| 196 | { | |
| 197 | $this->debug('commit transaction', 'commit'); | |
| 198 | if (!$this->in_transaction) { | |
| 199 | return $this->raiseError(MDB2_ERROR, null, null, | |
| 200 | 'commit: transaction changes are being auto committed'); | |
| 201 | } | |
| 202 | $query = 'COMMIT TRANSACTION '.$this->options['base_transaction_name']; | |
| 203 | $result = $this->_doQuery($query, true); | |
| 204 | if (PEAR::isError($result)) { | |
| 205 | return $result; | |
| 206 | } | |
| 207 | $this->in_transaction = false; | |
| 208 | return MDB2_OK; | |
| 209 | } | |
| 210 | ||
| 211 | // }}} | |
| 212 | // {{{ rollback() | |
| 213 | ||
| 214 | /** | |
| 215 | * Cancel any database changes done during a transaction that is in | |
| 216 | * progress. | |
| 217 | * | |
| 218 | * @return mixed MDB2_OK on success, a MDB2 error on failure | |
| 219 | * @access public | |
| 220 | */ | |
| 221 | function rollback() | |
| 222 | { | |
| 223 | $this->debug('rolling back transaction', 'rollback'); | |
| 224 | if (!$this->in_transaction) { | |
| 225 | return $this->raiseError(MDB2_ERROR, null, null, | |
| 226 | 'rollback: transactions can not be rolled back when changes are auto committed'); | |
| 227 | } | |
| 228 | $query = 'ROLLBACK TRANSACTION '.$this->options['base_transaction_name']; | |
| 229 | $result = $this->_doQuery($query, true); | |
| 230 | if (PEAR::isError($result)) { | |
| 231 | return $result; | |
| 232 | } | |
| 233 | $this->in_transaction = false; | |
| 234 | return MDB2_OK; | |
| 235 | } | |
| 236 | ||
| 237 | // }}} | |
| 238 | // {{{ getDatabaseFile() | |
| 239 | ||
| 240 | /** | |
| 241 | * Builds the string with path+dbname+extension | |
| 242 | * | |
| 243 | * @return string full database path+file | |
| 244 | * @access protected | |
| 245 | */ | |
| 246 | function _getDatabaseFile($database_name) | |
| 247 | { | |
| 248 | if ($database_name == '') { | |
| 249 | return $database_name; | |
| 250 | } | |
| 251 | return $this->options['database_path'].$database_name.$this->options['database_extension']; | |
| 252 | } | |
| 253 | ||
| 254 | // }}} | |
| 255 | // {{{ connect() | |
| 256 | ||
| 257 | /** | |
| 258 | * Connect to the database | |
| 259 | * | |
| 260 | * @return true on success, MDB2 Error Object on failure | |
| 261 | **/ | |
| 262 | function connect() | |
| 263 | { | |
| 264 | $database_file = $this->_getDatabaseFile($this->database_name); | |
| 265 | if (is_resource($this->connection)) { | |
| 266 | if (count(array_diff($this->connected_dsn, $this->dsn)) == 0 | |
| 267 | && $this->connected_database_name == $database_file | |
| 268 | && $this->opened_persistent == $this->options['persistent'] | |
| 269 | ) { | |
| 270 | return MDB2_OK; | |
| 271 | } | |
| 272 | $this->disconnect(false); | |
| 273 | } | |
| 274 | ||
| 275 | if (!PEAR::loadExtension($this->phptype)) { | |
| 276 | return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null, | |
| 277 | 'connect: extension '.$this->phptype.' is not compiled into PHP'); | |
| 278 | } | |
| 279 | ||
| 280 | if (!empty($this->database_name)) { | |
| 281 | if (!file_exists($database_file)) { | |
| 282 | if (!touch($database_file)) { | |
| 283 | return $this->raiseError(MDB2_ERROR_NOT_FOUND); | |
| 284 | } | |
| 285 | if (!isset($this->dsn['mode']) | |
| 286 | || !is_numeric($this->dsn['mode']) | |
| 287 | ) { | |
| 288 | $mode = 0644; | |
| 289 | } else { | |
| 290 | $mode = octdec($this->dsn['mode']); | |
| 291 | } | |
| 292 | if (!chmod($database_file, $mode)) { | |
| 293 | return $this->raiseError(MDB2_ERROR_NOT_FOUND); | |
| 294 | } | |
| 295 | if (!file_exists($database_file)) { | |
| 296 | return $this->raiseError(MDB2_ERROR_NOT_FOUND); | |
| 297 | } | |
| 298 | } | |
| 299 | if (!is_file($database_file)) { | |
| 300 | return $this->raiseError(MDB2_ERROR_INVALID); | |
| 301 | } | |
| 302 | if (!is_readable($database_file)) { | |
| 303 | return $this->raiseError(MDB2_ERROR_ACCESS_VIOLATION); | |
| 304 | } | |
| 305 | ||
| 306 | $connect_function = ($this->options['persistent'] ? 'sqlite_popen' : 'sqlite_open'); | |
| 307 | $php_errormsg = ''; | |
| 308 | @ini_set('track_errors', true); | |
| 309 | $connection = @$connect_function($database_file); | |
| 310 | @ini_restore('track_errors'); | |
| 311 | $this->_lasterror = isset($php_errormsg) ? $php_errormsg : ''; | |
| 312 | if (!$connection) { | |
| 313 | return $this->raiseError(MDB2_ERROR_CONNECT_FAILED); | |
| 314 | } | |
| 315 | $this->connection = $connection; | |
| 316 | $this->connected_dsn = $this->dsn; | |
| 317 | $this->connected_database_name = $database_file; | |
| 318 | $this->opened_persistent = $this->getoption('persistent'); | |
| 319 | $this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype; | |
| 320 | } | |
| 321 | return MDB2_OK; | |
| 322 | } | |
| 323 | ||
| 324 | // }}} | |
| 325 | // {{{ disconnect() | |
| 326 | ||
| 327 | /** | |
| 328 | * Log out and disconnect from the database. | |
| 329 | * | |
| 330 | * @return mixed true on success, false if not connected and error | |
| 331 | * object on error | |
| 332 | * @access public | |
| 333 | */ | |
| 334 | function disconnect($force = true) | |
| 335 | { | |
| 336 | if (is_resource($this->connection)) { | |
| 337 | if (!$this->opened_persistent || $force) { | |
| 338 | @sqlite_close($this->connection); | |
| 339 | } | |
| 340 | $this->connection = 0; | |
| 341 | } | |
| 342 | return MDB2_OK; | |
| 343 | } | |
| 344 | ||
| 345 | // }}} | |
| 346 | // {{{ _doQuery() | |
| 347 | ||
| 348 | /** | |
| 349 | * Execute a query | |
| 350 | * @param string $query query | |
| 351 | * @param boolean $isManip if the query is a manipulation query | |
| 352 | * @param resource $connection | |
| 353 | * @param string $database_name | |
| 354 | * @return result or error object | |
| 355 | * @access protected | |
| 356 | */ | |
| 357 | function _doQuery($query, $isManip = false, $connection = null, $database_name = null) | |
| 358 | { | |
| 359 | $this->last_query = $query; | |
| 360 | $this->debug($query, 'query'); | |
| 361 | if ($this->options['disable_query']) { | |
| 362 | if ($isManip) { | |
| 363 | return MDB2_OK; | |
| 364 | } | |
| 365 | return null; | |
| 366 | } | |
| 367 | ||
| 368 | if (is_null($connection)) { | |
| 369 | $error = $this->connect(); | |
| 370 | if (PEAR::isError($error)) { | |
| 371 | return $error; | |
| 372 | } | |
| 373 | $connection = $this->connection; | |
| 374 | } | |
| 375 | ||
| 376 | $function = $this->options['result_buffering'] | |
| 377 | ? 'sqlite_query' : 'sqlite_unbuffered_query'; | |
| 378 | $php_errormsg = ''; | |
| 379 | ini_set('track_errors', true); | |
| 380 | $result = @$function($query.';', $connection); | |
| 381 | ini_restore('track_errors'); | |
| 382 | $this->_lasterror = isset($php_errormsg) ? $php_errormsg : ''; | |
| 383 | ||
| 384 | if (!$result) { | |
| 385 | return $this->raiseError(); | |
| 386 | } | |
| 387 | ||
| 388 | if ($isManip) { | |
| 389 | return @sqlite_changes($connection); | |
| 390 | } | |
| 391 | return $result; | |
| 392 | } | |
| 393 | ||
| 394 | // }}} | |
| 395 | // {{{ _modifyQuery() | |
| 396 | ||
| 397 | /** | |
| 398 | * Changes a query string for various DBMS specific reasons | |
| 399 | * | |
| 400 | * @param string $query query to modify | |
| 401 | * @return the new (modified) query | |
| 402 | * @access protected | |
| 403 | */ | |
| 404 | function _modifyQuery($query, $isManip, $limit, $offset) | |
| 405 | { | |
| 406 | if ($this->options['portability'] & MDB2_PORTABILITY_DELETE_COUNT) { | |
| 407 | if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) { | |
| 408 | $query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/', | |
| 409 | 'DELETE FROM \1 WHERE 1=1', $query); | |
| 410 | } | |
| 411 | } | |
| 412 | if ($limit > 0 | |
| 413 | && !preg_match('/LIMIT\s*\d(\s*(,|OFFSET)\s*\d+)?/i', $query) | |
| 414 | ) { | |
| 415 | $query = rtrim($query); | |
| 416 | if (substr($query, -1) == ';') { | |
| 417 | $query = substr($query, 0, -1); | |
| 418 | } | |
| 419 | if ($isManip) { | |
| 420 | $query .= " LIMIT $limit"; | |
| 421 | } else { | |
| 422 | $query .= " LIMIT $offset,$limit"; | |
| 423 | } | |
| 424 | } | |
| 425 | return $query; | |
| 426 | } | |
| 427 | ||
| 428 | ||
| 429 | // }}} | |
| 430 | // {{{ replace() | |
| 431 | ||
| 432 | /** | |
| 433 | * Execute a SQL REPLACE query. A REPLACE query is identical to a INSERT | |
| 434 | * query, except that if there is already a row in the table with the same | |
| 435 | * key field values, the REPLACE query just updates its values instead of | |
| 436 | * inserting a new row. | |
| 437 | * | |
| 438 | * The REPLACE type of query does not make part of the SQL standards. Since | |
| 439 | * practically only SQLite implements it natively, this type of query is | |
| 440 | * emulated through this method for other DBMS using standard types of | |
| 441 | * queries inside a transaction to assure the atomicity of the operation. | |
| 442 | * | |
| 443 | * @access public | |
| 444 | * | |
| 445 | * @param string $table name of the table on which the REPLACE query will | |
| 446 | * be executed. | |
| 447 | * @param array $fields associative array that describes the fields and the | |
| 448 | * values that will be inserted or updated in the specified table. The | |
| 449 | * indexes of the array are the names of all the fields of the table. The | |
| 450 | * values of the array are also associative arrays that describe the | |
| 451 | * values and other properties of the table fields. | |
| 452 | * | |
| 453 | * Here follows a list of field properties that need to be specified: | |
| 454 | * | |
| 455 | * value: | |
| 456 | * Value to be assigned to the specified field. This value may be | |
| 457 | * of specified in database independent type format as this | |
| 458 | * function can perform the necessary datatype conversions. | |
| 459 | * | |
| 460 | * Default: | |
| 461 | * this property is required unless the Null property | |
| 462 | * is set to 1. | |
| 463 | * | |
| 464 | * type | |
| 465 | * Name of the type of the field. Currently, all types Metabase | |
| 466 | * are supported except for clob and blob. | |
| 467 | * | |
| 468 | * Default: no type conversion | |
| 469 | * | |
| 470 | * null | |
| 471 | * Boolean property that indicates that the value for this field | |
| 472 | * should be set to null. | |
| 473 | * | |
| 474 | * The default value for fields missing in INSERT queries may be | |
| 475 | * specified the definition of a table. Often, the default value | |
| 476 | * is already null, but since the REPLACE may be emulated using | |
| 477 | * an UPDATE query, make sure that all fields of the table are | |
| 478 | * listed in this function argument array. | |
| 479 | * | |
| 480 | * Default: 0 | |
| 481 | * | |
| 482 | * key | |
| 483 | * Boolean property that indicates that this field should be | |
| 484 | * handled as a primary key or at least as part of the compound | |
| 485 | * unique index of the table that will determine the row that will | |
| 486 | * updated if it exists or inserted a new row otherwise. | |
| 487 | * | |
| 488 | * This function will fail if no key field is specified or if the | |
| 489 | * value of a key field is set to null because fields that are | |
| 490 | * part of unique index they may not be null. | |
| 491 | * | |
| 492 | * Default: 0 | |
| 493 | * | |
| 494 | * @return mixed MDB2_OK on success, a MDB2 error on failure | |
| 495 | */ | |
| 496 | function replace($table, $fields) | |
| 497 | { | |
| 498 | $count = count($fields); | |
| 499 | $query = $values = ''; | |
| 500 | $keys = $colnum = 0; | |
| 501 | for (reset($fields); $colnum < $count; next($fields), $colnum++) { | |
| 502 | $name = key($fields); | |
| 503 | if ($colnum > 0) { | |
| 504 | $query .= ','; | |
| 505 | $values .= ','; | |
| 506 | } | |
| 507 | $query .= $name; | |
| 508 | if (isset($fields[$name]['null']) && $fields[$name]['null']) { | |
| 509 | $value = 'NULL'; | |
| 510 | } else { | |
| 511 | $value = $this->quote($fields[$name]['value'], $fields[$name]['type']); | |
| 512 | } | |
| 513 | $values .= $value; | |
| 514 | if (isset($fields[$name]['key']) && $fields[$name]['key']) { | |
| 515 | if ($value === 'NULL') { | |
| 516 | return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null, | |
| 517 | 'replace: key value '.$name.' may not be NULL'); | |
| 518 | } | |
| 519 | $keys++; | |
| 520 | } | |
| 521 | } | |
| 522 | if ($keys == 0) { | |
| 523 | return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null, | |
| 524 | 'replace: not specified which fields are keys'); | |
| 525 | } | |
| 526 | $query = "REPLACE INTO $table ($query) VALUES ($values)"; | |
| 527 | $this->last_query = $query; | |
| 528 | $this->debug($query, 'query'); | |
| 529 | return $this->_doQuery($query, true); | |
| 530 | } | |
| 531 | ||
| 532 | // }}} | |
| 533 | // {{{ nextID() | |
| 534 | ||
| 535 | /** | |
| 536 | * returns the next free id of a sequence | |
| 537 | * | |
| 538 | * @param string $seq_name name of the sequence | |
| 539 | * @param boolean $ondemand when true the seqence is | |
| 540 | * automatic created, if it | |
| 541 | * not exists | |
| 542 | * | |
| 543 | * @return mixed MDB2 Error Object or id | |
| 544 | * @access public | |
| 545 | */ | |
| 546 | function nextID($seq_name, $ondemand = true) | |
| 547 | { | |
| 548 | $sequence_name = $this->getSequenceName($seq_name); | |
| 549 | $query = "INSERT INTO $sequence_name (".$this->options['seqcol_name'].") VALUES (NULL)"; | |
| 550 | $this->expectError(MDB2_ERROR_NOSUCHTABLE); | |
| 551 | $result = $this->_doQuery($query, true); | |
| 552 | $this->popExpect(); | |
| 553 | if (PEAR::isError($result)) { | |
| 554 | if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) { | |
| 555 | $this->loadModule('Manager'); | |
| 556 | // Since we are creating the sequence on demand | |
| 557 | // we know the first id = 1 so initialize the | |
| 558 | // sequence at 2 | |
| 559 | $result = $this->manager->createSequence($seq_name, 2); | |
| 560 | if (PEAR::isError($result)) { | |
| 561 | return $this->raiseError(MDB2_ERROR, null, null, | |
| 562 | 'nextID: on demand sequence '.$seq_name.' could not be created'); | |
| 563 | } else { | |
| 564 | // First ID of a newly created sequence is 1 | |
| 565 | return 1; | |
| 566 | } | |
| 567 | } | |
| 568 | return $result; | |
| 569 | } | |
| 570 | $value = @sqlite_last_insert_rowid($this->connection); | |
| 571 | if (is_numeric($value) | |
| 572 | && PEAR::isError($this->_doQuery("DELETE FROM $sequence_name WHERE ".$this->options['seqcol_name']." < $value", true)) | |
| 573 | ) { | |
| 574 | $this->warnings[] = 'nextID: could not delete previous sequence table values from '.$seq_name; | |
| 575 | } | |
| 576 | return $value; | |
| 577 | } | |
| 578 | ||
| 579 | // }}} | |
| 580 | // {{{ getAfterID() | |
| 581 | ||
| 582 | /** | |
| 583 | * returns the autoincrement ID if supported or $id | |
| 584 | * | |
| 585 | * @param mixed $id value as returned by getBeforeId() | |
| 586 | * @param string $table name of the table into which a new row was inserted | |
| 587 | * @return mixed MDB2 Error Object or id | |
| 588 | * @access public | |
| 589 | */ | |
| 590 | function getAfterID($id, $table) | |
| 591 | { | |
| 592 | $this->loadModule('Native'); | |
| 593 | return $this->native->getInsertID(); | |
| 594 | } | |
| 595 | ||
| 596 | // }}} | |
| 597 | // {{{ currID() | |
| 598 | ||
| 599 | /** | |
| 600 | * returns the current id of a sequence | |
| 601 | * | |
| 602 | * @param string $seq_name name of the sequence | |
| 603 | * @return mixed MDB2 Error Object or id | |
| 604 | * @access public | |
| 605 | */ | |
| 606 | function currID($seq_name) | |
| 607 | { | |
| 608 | $sequence_name = $this->getSequenceName($seq_name); | |
| 609 | return $this->queryOne("SELECT MAX(".$this->options['seqcol_name'].") FROM $sequence_name", 'integer'); | |
| 610 | } | |
| 611 | } | |
| 612 | ||
| 613 | class MDB2_Result_sqlite extends MDB2_Result_Common | |
| 614 | { | |
| 615 | // }}} | |
| 616 | // {{{ fetchRow() | |
| 617 | ||
| 618 | /** | |
| 619 | * Fetch a row and insert the data into an existing array. | |
| 620 | * | |
| 621 | * @param int $fetchmode how the array data should be indexed | |
| 622 | * @param int $rownum number of the row where the data can be found | |
| 623 | * @return int data array on success, a MDB2 error on failure | |
| 624 | * @access public | |
| 625 | */ | |
| 626 | function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null) | |
| 627 | { | |
| 628 | if (!is_null($rownum)) { | |
| 629 | $seek = $this->seek($rownum); | |
| 630 | if (PEAR::isError($seek)) { | |
| 631 | return $seek; | |
| 632 | } | |
| 633 | } | |
| 634 | if ($fetchmode == MDB2_FETCHMODE_DEFAULT) { | |
| 635 | $fetchmode = $this->db->fetchmode; | |
| 636 | } | |
| 637 | if ($fetchmode & MDB2_FETCHMODE_ASSOC) { | |
| 638 | $row = @sqlite_fetch_array($this->result, SQLITE_ASSOC); | |
| 639 | if (is_array($row) | |
| 640 | && $this->db->options['portability'] & MDB2_PORTABILITY_LOWERCASE | |
| 641 | ) { | |
| 642 | $row = array_change_key_case($row, CASE_LOWER); | |
| 643 | } | |
| 644 | } else { | |
| 645 | $row = @sqlite_fetch_array($this->result, SQLITE_NUM); | |
| 646 | } | |
| 647 | if (!$row) { | |
| 648 | if (is_null($this->result)) { | |
| 649 | return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null, | |
| 650 | 'fetchRow: resultset has already been freed'); | |
| 651 | } | |
| 652 | return null; | |
| 653 | } | |
| 654 | if ($this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL) { | |
| 655 | $this->db->_convertEmptyArrayValuesToNull($row); | |
| 656 | } | |
| 657 | if (isset($this->values)) { | |
| 658 | $this->_assignBindColumns($row); | |
| 659 | } | |
| 660 | if (isset($this->types)) { | |
| 661 | $row = $this->db->datatype->convertResultRow($this->types, $row); | |
| 662 | } | |
| 663 | if ($fetchmode === MDB2_FETCHMODE_OBJECT) { | |
| 664 | $object_class = $this->db->options['fetch_class']; | |
| 665 | if ($object_class == 'stdClass') { | |
| 666 | $row = (object) $row; | |
| 667 | } else { | |
| 668 | $row = &new $object_class($row); | |
| 669 | } | |
| 670 | } | |
| 671 | ++$this->rownum; | |
| 672 | return $row; | |
| 673 | } | |
| 674 | ||
| 675 | // }}} | |
| 676 | // {{{ _getColumnNames() | |
| 677 | ||
| 678 | /** | |
| 679 | * Retrieve the names of columns returned by the DBMS in a query result. | |
| 680 | * | |
| 681 | * @return mixed an associative array variable | |
| 682 | * that will hold the names of columns. The | |
| 683 | * indexes of the array are the column names | |
| 684 | * mapped to lower case and the values are the | |
| 685 | * respective numbers of the columns starting | |
| 686 | * from 0. Some DBMS may not return any | |
| 687 | * columns when the result set does not | |
| 688 | * contain any rows. | |
| 689 | * | |
| 690 | * a MDB2 error on failure | |
| 691 | * @access private | |
| 692 | */ | |
| 693 | function _getColumnNames() | |
| 694 | { | |
| 695 | $columns = array(); | |
| 696 | $numcols = $this->numCols(); | |
| 697 | if (PEAR::isError($numcols)) { | |
| 698 | return $numcols; | |
| 699 | } | |
| 700 | for ($column = 0; $column < $numcols; $column++) { | |
| 701 | $column_name = @sqlite_field_name($this->result, $column); | |
| 702 | $columns[$column_name] = $column; | |
| 703 | } | |
| 704 | if ($this->db->options['portability'] & MDB2_PORTABILITY_LOWERCASE) { | |
| 705 | $columns = array_change_key_case($columns, CASE_LOWER); | |
| 706 | } | |
| 707 | return $columns; | |
| 708 | } | |
| 709 | ||
| 710 | // }}} | |
| 711 | // {{{ numCols() | |
| 712 | ||
| 713 | /** | |
| 714 | * Count the number of columns returned by the DBMS in a query result. | |
| 715 | * | |
| 716 | * @access public | |
| 717 | * @return mixed integer value with the number of columns, a MDB2 error | |
| 718 | * on failure | |
| 719 | */ | |
| 720 | function numCols() | |
| 721 | { | |
| 722 | $cols = @sqlite_num_fields($this->result); | |
| 723 | if (is_null($cols)) { | |
| 724 | if (is_null($this->result)) { | |
| 725 | return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null, | |
| 726 | 'numCols: resultset has already been freed'); | |
| 727 | } | |
| 728 | return $this->db->raiseError(); | |
| 729 | } | |
| 730 | return $cols; | |
| 731 | } | |
| 732 | } | |
| 733 | ||
| 734 | class MDB2_BufferedResult_sqlite extends MDB2_Result_sqlite | |
| 735 | { | |
| 736 | // {{{ seek() | |
| 737 | ||
| 738 | /** | |
| 739 | * seek to a specific row in a result set | |
| 740 | * | |
| 741 | * @param int $rownum number of the row where the data can be found | |
| 742 | * @return mixed MDB2_OK on success, a MDB2 error on failure | |
| 743 | * @access public | |
| 744 | */ | |
| 745 | function seek($rownum = 0) | |
| 746 | { | |
| 747 | if (!@sqlite_seek($this->result, $rownum)) { | |
| 748 | if (is_null($this->result)) { | |
| 749 | return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null, | |
| 750 | 'seek: resultset has already been freed'); | |
| 751 | } | |
| 752 | return $this->db->raiseError(MDB2_ERROR_INVALID, null, null, | |
| 753 | 'seek: tried to seek to an invalid row number ('.$rownum.')'); | |
| 754 | } | |
| 755 | $this->rownum = $rownum - 1; | |
| 756 | return MDB2_OK; | |
| 757 | } | |
| 758 | ||
| 759 | // }}} | |
| 760 | // {{{ valid() | |
| 761 | ||
| 762 | /** | |
| 763 | * check if the end of the result set has been reached | |
| 764 | * | |
| 765 | * @return mixed true or false on sucess, a MDB2 error on failure | |
| 766 | * @access public | |
| 767 | */ | |
| 768 | function valid() | |
| 769 | { | |
| 770 | $numrows = $this->numRows(); | |
| 771 | if (PEAR::isError($numrows)) { | |
| 772 | return $numrows; | |
| 773 | } | |
| 774 | return $this->rownum < ($numrows - 1); | |
| 775 | } | |
| 776 | ||
| 777 | // }}} | |
| 778 | // {{{ numRows() | |
| 779 | ||
| 780 | /** | |
| 781 | * returns the number of rows in a result object | |
| 782 | * | |
| 783 | * @return mixed MDB2 Error Object or the number of rows | |
| 784 | * @access public | |
| 785 | */ | |
| 786 | function numRows() | |
| 787 | { | |
| 788 | $rows = @sqlite_num_rows($this->result); | |
| 789 | if (is_null($rows)) { | |
| 790 | if (is_null($this->result)) { | |
| 791 | return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null, | |
| 792 | 'numRows: resultset has already been freed'); | |
| 793 | } | |
| 794 | return $this->raiseError(); | |
| 795 | } | |
| 796 | return $rows; | |
| 797 | } | |
| 798 | } | |
| 799 | ||
| 800 | class MDB2_Statement_sqlite extends MDB2_Statement_Common | |
| 801 | { | |
| 802 | ||
| 803 | } | |
| 804 | ||
| 805 | ?> | |
