3 /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
6 * The PEAR DB driver for PHP's sybase extension
7 * for interacting with Sybase databases
11 * LICENSE: This source file is subject to version 3.0 of the PHP license
12 * that is available through the world-wide-web at the following URI:
13 * http://www.php.net/license/3_0.txt. If you did not receive a copy of
14 * the PHP License and are unable to obtain it through the web, please
15 * send a note to license@php.net so we can mail you a copy immediately.
19 * @author Sterling Hughes <sterling@php.net>
20 * @author Antônio Carlos Venâncio Júnior <floripa@php.net>
21 * @author Daniel Convissor <danielc@php.net>
22 * @copyright 1997-2005 The PHP Group
23 * @license http://www.php.net/license/3_0.txt PHP License 3.0
24 * @version CVS: $Id: sybase.php 12 2005-10-02 11:36:35Z sparc $
25 * @link http://pear.php.net/package/DB
29 * Obtain the DB_common class so it can be extended from
31 require_once 'DB/common.php';
34 * The methods PEAR DB uses to interact with PHP's sybase extension
35 * for interacting with Sybase databases
37 * These methods overload the ones declared in DB_common.
39 * WARNING: This driver may fail with multiple connections under the
40 * same user/pass/host and different databases.
44 * @author Sterling Hughes <sterling@php.net>
45 * @author Antônio Carlos Venâncio Júnior <floripa@php.net>
46 * @author Daniel Convissor <danielc@php.net>
47 * @copyright 1997-2005 The PHP Group
48 * @license http://www.php.net/license/3_0.txt PHP License 3.0
49 * @version Release: @package_version@
50 * @link http://pear.php.net/package/DB
52 class DB_sybase extends DB_common
57 * The DB driver type (mysql, oci8, odbc, etc.)
60 var $phptype = 'sybase';
63 * The database syntax variant to be used (db2, access, etc.), if any
66 var $dbsyntax = 'sybase';
69 * The capabilities of this DB implementation
71 * The 'new_link' element contains the PHP version that first provided
72 * new_link support for this DBMS. Contains false if it's unsupported.
74 * Meaning of the 'limit' element:
75 * + 'emulate' = emulate with fetch row by number
76 * + 'alter' = alter the query
81 var $features = array(
88 'transactions' => true,
92 * A mapping of native error codes to DB error codes
95 var $errorcode_map = array(
99 * The raw database connection created by PHP
105 * The DSN information for connecting to a database
112 * Should data manipulation queries be committed automatically?
116 var $autocommit = true;
119 * The quantity of transactions begun
121 * {@internal While this is private, it can't actually be designated
122 * private in PHP 5 because it is directly accessed in the test suite.}}
127 var $transaction_opcount = 0;
130 * The database specified in the DSN
132 * It's a fix to allow calls to different databases in the same script.
144 * This constructor calls <kbd>$this->DB_common()</kbd>
157 * Connect to the database server, log in and open the database
159 * Don't call this method directly. Use DB::connect() instead.
161 * PEAR DB's sybase driver supports the following extra DSN options:
162 * + appname The application name to use on this connection.
163 * Available since PEAR DB 1.7.0.
164 * + charset The character set to use on this connection.
165 * Available since PEAR DB 1.7.0.
167 * @param array $dsn the data source name
168 * @param bool $persistent should the connection be persistent?
170 * @return int DB_OK on success. A DB_Error object on failure.
172 function connect($dsn, $persistent = false)
174 if (!PEAR::loadExtension('sybase') &&
175 !PEAR::loadExtension('sybase_ct'))
177 return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
181 if ($dsn['dbsyntax']) {
182 $this->dbsyntax = $dsn['dbsyntax'];
185 $dsn['hostspec'] = $dsn['hostspec'] ? $dsn['hostspec'] : 'localhost';
186 $dsn['password'] = !empty($dsn['password']) ? $dsn['password'] : false;
187 $dsn['charset'] = isset($dsn['charset']) ? $dsn['charset'] : false;
188 $dsn['appname'] = isset($dsn['appname']) ? $dsn['appname'] : false;
190 $connect_function = $persistent ? 'sybase_pconnect' : 'sybase_connect';
192 if ($dsn['username']) {
193 $this->connection = @$connect_function($dsn['hostspec'],
199 return $this->raiseError(DB_ERROR_CONNECT_FAILED,
201 'The DSN did not contain a username.');
204 if (!$this->connection) {
205 return $this->raiseError(DB_ERROR_CONNECT_FAILED,
207 @sybase_get_last_message());
210 if ($dsn['database']) {
211 if (!@sybase_select_db($dsn['database'], $this->connection)) {
212 return $this->raiseError(DB_ERROR_NODBSELECTED,
214 @sybase_get_last_message());
216 $this->_db = $dsn['database'];
226 * Disconnects from the database server
228 * @return bool TRUE on success, FALSE on failure
230 function disconnect()
232 $ret = @sybase_close($this->connection);
233 $this->connection = null;
241 * Sends a query to the database server
243 * @param string the SQL query string
245 * @return mixed + a PHP result resrouce for successful SELECT queries
246 * + the DB_OK constant for other successful queries
247 * + a DB_Error object on failure
249 function simpleQuery($query)
251 $ismanip = DB::isManip($query);
252 $this->last_query = $query;
253 if (!@sybase_select_db($this->_db, $this->connection)) {
254 return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED);
256 $query = $this->modifyQuery($query);
257 if (!$this->autocommit && $ismanip) {
258 if ($this->transaction_opcount == 0) {
259 $result = @sybase_query('BEGIN TRANSACTION', $this->connection);
261 return $this->sybaseRaiseError();
264 $this->transaction_opcount++;
266 $result = @sybase_query($query, $this->connection);
268 return $this->sybaseRaiseError();
270 if (is_resource($result)) {
273 // Determine which queries that should return data, and which
274 // should return an error code only.
275 return $ismanip ? DB_OK : $result;
282 * Move the internal sybase result pointer to the next available result
284 * @param a valid sybase result resource
288 * @return true if a result is available otherwise return false
290 function nextResult($result)
299 * Places a row from the result set into the given array
301 * Formating of the array and the data therein are configurable.
302 * See DB_result::fetchInto() for more information.
304 * This method is not meant to be called directly. Use
305 * DB_result::fetchInto() instead. It can't be declared "protected"
306 * because DB_result is a separate object.
308 * @param resource $result the query result resource
309 * @param array $arr the referenced array to put the data in
310 * @param int $fetchmode how the resulting array should be indexed
311 * @param int $rownum the row number to fetch (0 = first row)
313 * @return mixed DB_OK on success, NULL when the end of a result set is
314 * reached or on failure
316 * @see DB_result::fetchInto()
318 function fetchInto($result, &$arr, $fetchmode, $rownum = null)
320 if ($rownum !== null) {
321 if (!@sybase_data_seek($result, $rownum)) {
325 if ($fetchmode & DB_FETCHMODE_ASSOC) {
326 if (function_exists('sybase_fetch_assoc')) {
327 $arr = @sybase_fetch_assoc($result);
329 if ($arr = @sybase_fetch_array($result)) {
330 foreach ($arr as $key => $value) {
337 if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {
338 $arr = array_change_key_case($arr, CASE_LOWER);
341 $arr = @sybase_fetch_row($result);
346 if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {
347 $this->_rtrimArrayValues($arr);
349 if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) {
350 $this->_convertNullArrayValuesToEmpty($arr);
359 * Deletes the result set and frees the memory occupied by the result set
361 * This method is not meant to be called directly. Use
362 * DB_result::free() instead. It can't be declared "protected"
363 * because DB_result is a separate object.
365 * @param resource $result PHP's query result resource
367 * @return bool TRUE on success, FALSE if $result is invalid
369 * @see DB_result::free()
371 function freeResult($result)
373 return @sybase_free_result($result);
380 * Gets the number of columns in a result set
382 * This method is not meant to be called directly. Use
383 * DB_result::numCols() instead. It can't be declared "protected"
384 * because DB_result is a separate object.
386 * @param resource $result PHP's query result resource
388 * @return int the number of columns. A DB_Error object on failure.
390 * @see DB_result::numCols()
392 function numCols($result)
394 $cols = @sybase_num_fields($result);
396 return $this->sybaseRaiseError();
405 * Gets the number of rows in a result set
407 * This method is not meant to be called directly. Use
408 * DB_result::numRows() instead. It can't be declared "protected"
409 * because DB_result is a separate object.
411 * @param resource $result PHP's query result resource
413 * @return int the number of rows. A DB_Error object on failure.
415 * @see DB_result::numRows()
417 function numRows($result)
419 $rows = @sybase_num_rows($result);
420 if ($rows === false) {
421 return $this->sybaseRaiseError();
427 // {{{ affectedRows()
430 * Determines the number of rows affected by a data maniuplation query
432 * 0 is returned for queries that don't manipulate data.
434 * @return int the number of rows. A DB_Error object on failure.
436 function affectedRows()
438 if (DB::isManip($this->last_query)) {
439 $result = @sybase_affected_rows($this->connection);
450 * Returns the next free id in a sequence
452 * @param string $seq_name name of the sequence
453 * @param boolean $ondemand when true, the seqence is automatically
454 * created if it does not exist
456 * @return int the next id number in the sequence.
457 * A DB_Error object on failure.
459 * @see DB_common::nextID(), DB_common::getSequenceName(),
460 * DB_sybase::createSequence(), DB_sybase::dropSequence()
462 function nextId($seq_name, $ondemand = true)
464 $seqname = $this->getSequenceName($seq_name);
465 if (!@sybase_select_db($this->_db, $this->connection)) {
466 return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED);
470 $this->pushErrorHandling(PEAR_ERROR_RETURN);
471 $result = $this->query("INSERT INTO $seqname (vapor) VALUES (0)");
472 $this->popErrorHandling();
473 if ($ondemand && DB::isError($result) &&
474 ($result->getCode() == DB_ERROR || $result->getCode() == DB_ERROR_NOSUCHTABLE))
477 $result = $this->createSequence($seq_name);
478 if (DB::isError($result)) {
479 return $this->raiseError($result);
481 } elseif (!DB::isError($result)) {
482 $result =& $this->query("SELECT @@IDENTITY FROM $seqname");
488 if (DB::isError($result)) {
489 return $this->raiseError($result);
491 $result = $result->fetchRow(DB_FETCHMODE_ORDERED);
496 * Creates a new sequence
498 * @param string $seq_name name of the new sequence
500 * @return int DB_OK on success. A DB_Error object on failure.
502 * @see DB_common::createSequence(), DB_common::getSequenceName(),
503 * DB_sybase::nextID(), DB_sybase::dropSequence()
505 function createSequence($seq_name)
507 return $this->query('CREATE TABLE '
508 . $this->getSequenceName($seq_name)
509 . ' (id numeric(10, 0) IDENTITY NOT NULL,'
510 . ' vapor int NULL)');
514 // {{{ dropSequence()
519 * @param string $seq_name name of the sequence to be deleted
521 * @return int DB_OK on success. A DB_Error object on failure.
523 * @see DB_common::dropSequence(), DB_common::getSequenceName(),
524 * DB_sybase::nextID(), DB_sybase::createSequence()
526 function dropSequence($seq_name)
528 return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name));
535 * Enables or disables automatic commits
537 * @param bool $onoff true turns it on, false turns it off
539 * @return int DB_OK on success. A DB_Error object if the driver
540 * doesn't support auto-committing transactions.
542 function autoCommit($onoff = false)
544 // XXX if $this->transaction_opcount > 0, we should probably
545 // issue a warning here.
546 $this->autocommit = $onoff ? true : false;
554 * Commits the current transaction
556 * @return int DB_OK on success. A DB_Error object on failure.
560 if ($this->transaction_opcount > 0) {
561 if (!@sybase_select_db($this->_db, $this->connection)) {
562 return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED);
564 $result = @sybase_query('COMMIT', $this->connection);
565 $this->transaction_opcount = 0;
567 return $this->sybaseRaiseError();
577 * Reverts the current transaction
579 * @return int DB_OK on success. A DB_Error object on failure.
583 if ($this->transaction_opcount > 0) {
584 if (!@sybase_select_db($this->_db, $this->connection)) {
585 return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED);
587 $result = @sybase_query('ROLLBACK', $this->connection);
588 $this->transaction_opcount = 0;
590 return $this->sybaseRaiseError();
597 // {{{ sybaseRaiseError()
600 * Produces a DB_Error object regarding the current problem
602 * @param int $errno if the error is being manually raised pass a
603 * DB_ERROR* constant here. If this isn't passed
604 * the error information gathered from the DBMS.
606 * @return object the DB_Error object
608 * @see DB_common::raiseError(),
609 * DB_sybase::errorNative(), DB_sybase::errorCode()
611 function sybaseRaiseError($errno = null)
613 $native = $this->errorNative();
614 if ($errno === null) {
615 $errno = $this->errorCode($native);
617 return $this->raiseError($errno, null, null, null, $native);
624 * Gets the DBMS' native error message produced by the last query
626 * @return string the DBMS' error message
628 function errorNative()
630 return @sybase_get_last_message();
637 * Determines PEAR::DB error code from the database's text error message.
639 * @param string $errormsg error message returned from the database
640 * @return integer an error number from a DB error constant
642 function errorCode($errormsg)
644 static $error_regexps;
645 if (!isset($error_regexps)) {
646 $error_regexps = array(
647 '/Incorrect syntax near/'
649 '/^Unclosed quote before the character string [\"\'].*[\"\']\./'
651 '/Implicit conversion (from datatype|of NUMERIC value)/i'
652 => DB_ERROR_INVALID_NUMBER,
653 '/Cannot drop the table [\"\'].+[\"\'], because it doesn\'t exist in the system catalogs\./'
654 => DB_ERROR_NOSUCHTABLE,
655 '/Only the owner of object [\"\'].+[\"\'] or a user with System Administrator \(SA\) role can run this command\./'
656 => DB_ERROR_ACCESS_VIOLATION,
657 '/^.+ permission denied on object .+, database .+, owner .+/'
658 => DB_ERROR_ACCESS_VIOLATION,
659 '/^.* permission denied, database .+, owner .+/'
660 => DB_ERROR_ACCESS_VIOLATION,
661 '/[^.*] not found\./'
662 => DB_ERROR_NOSUCHTABLE,
663 '/There is already an object named/'
664 => DB_ERROR_ALREADY_EXISTS,
665 '/Invalid column name/'
666 => DB_ERROR_NOSUCHFIELD,
667 '/does not allow null values/'
668 => DB_ERROR_CONSTRAINT_NOT_NULL,
669 '/Command has been aborted/'
670 => DB_ERROR_CONSTRAINT,
671 '/^Cannot drop the index .* because it doesn\'t exist/i'
672 => DB_ERROR_NOT_FOUND,
673 '/^There is already an index/i'
674 => DB_ERROR_ALREADY_EXISTS,
675 '/^There are fewer columns in the INSERT statement than values specified/i'
676 => DB_ERROR_VALUE_COUNT_ON_ROW,
680 foreach ($error_regexps as $regexp => $code) {
681 if (preg_match($regexp, $errormsg)) {
692 * Returns information about a table or a result set
694 * NOTE: only supports 'table' and 'flags' if <var>$result</var>
697 * @param object|string $result DB_result object from a query or a
698 * string containing the name of a table.
699 * While this also accepts a query result
700 * resource identifier, this behavior is
702 * @param int $mode a valid tableInfo mode
704 * @return array an associative array with the information requested.
705 * A DB_Error object on failure.
707 * @see DB_common::tableInfo()
708 * @since Method available since Release 1.6.0
710 function tableInfo($result, $mode = null)
712 if (is_string($result)) {
714 * Probably received a table name.
715 * Create a result resource identifier.
717 if (!@sybase_select_db($this->_db, $this->connection)) {
718 return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED);
720 $id = @sybase_query("SELECT * FROM $result WHERE 1=0",
723 } elseif (isset($result->result)) {
725 * Probably received a result object.
726 * Extract the result resource identifier.
728 $id = $result->result;
732 * Probably received a result resource identifier.
734 * Deprecated. Here for compatibility only.
740 if (!is_resource($id)) {
741 return $this->sybaseRaiseError(DB_ERROR_NEED_MORE_DATA);
744 if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
745 $case_func = 'strtolower';
747 $case_func = 'strval';
750 $count = @sybase_num_fields($id);
754 $res['num_fields'] = $count;
757 for ($i = 0; $i < $count; $i++) {
758 $f = @sybase_fetch_field($id, $i);
759 // column_source is often blank
761 'table' => $got_string
762 ? $case_func($result)
763 : $case_func($f->column_source),
764 'name' => $case_func($f->name),
766 'len' => $f->max_length,
769 if ($res[$i]['table']) {
770 $res[$i]['flags'] = $this->_sybase_field_flags(
771 $res[$i]['table'], $res[$i]['name']);
773 if ($mode & DB_TABLEINFO_ORDER) {
774 $res['order'][$res[$i]['name']] = $i;
776 if ($mode & DB_TABLEINFO_ORDERTABLE) {
777 $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
781 // free the result only if we were called on a table
783 @sybase_free_result($id);
789 // {{{ _sybase_field_flags()
792 * Get the flags for a field
794 * Currently supports:
795 * + <samp>unique_key</samp> (unique index, unique check or primary_key)
796 * + <samp>multiple_key</samp> (multi-key index)
798 * @param string $table the table name
799 * @param string $column the field name
801 * @return string space delimited string of flags. Empty string if none.
805 function _sybase_field_flags($table, $column)
807 static $tableName = null;
808 static $flags = array();
810 if ($table != $tableName) {
814 // get unique/primary keys
815 $res = $this->getAll("sp_helpindex $table", DB_FETCHMODE_ASSOC);
817 if (!isset($res[0]['index_description'])) {
821 foreach ($res as $val) {
822 $keys = explode(', ', trim($val['index_keys']));
824 if (sizeof($keys) > 1) {
825 foreach ($keys as $key) {
826 $this->_add_flag($flags[$key], 'multiple_key');
830 if (strpos($val['index_description'], 'unique')) {
831 foreach ($keys as $key) {
832 $this->_add_flag($flags[$key], 'unique_key');
839 if (array_key_exists($column, $flags)) {
840 return(implode(' ', $flags[$column]));
850 * Adds a string to the flags array if the flag is not yet in there
851 * - if there is no flag present the array is created
853 * @param array $array reference of flags array to add a value to
854 * @param mixed $value value to add to the flag array
860 function _add_flag(&$array, $value)
862 if (!is_array($array)) {
863 $array = array($value);
864 } elseif (!in_array($value, $array)) {
865 array_push($array, $value);
870 // {{{ getSpecialQuery()
873 * Obtains the query string needed for listing a given type of objects
875 * @param string $type the kind of objects you want to retrieve
877 * @return string the SQL query string or null if the driver doesn't
878 * support the object type requested
881 * @see DB_common::getListOf()
883 function getSpecialQuery($type)
887 return "SELECT name FROM sysobjects WHERE type = 'U'"
890 return "SELECT name FROM sysobjects WHERE type = 'V'";