Go to most recent revision | Blame | Last modification | View Log | RSS feed
<?php/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: *//*** The PEAR DB driver for PHP's sybase extension* for interacting with Sybase databases** PHP versions 4 and 5** LICENSE: This source file is subject to version 3.0 of the PHP license* that is available through the world-wide-web at the following URI:* http://www.php.net/license/3_0.txt. If you did not receive a copy of* the PHP License and are unable to obtain it through the web, please* send a note to license@php.net so we can mail you a copy immediately.** @category Database* @package DB* @author Sterling Hughes <sterling@php.net>* @author Antônio Carlos Venâncio Júnior <floripa@php.net>* @author Daniel Convissor <danielc@php.net>* @copyright 1997-2007 The PHP Group* @license http://www.php.net/license/3_0.txt PHP License 3.0* @version CVS: $Id: sybase.php,v 1.1 2008/07/07 18:00:39 mrflos Exp $* @link http://pear.php.net/package/DB*//*** Obtain the DB_common class so it can be extended from*/require_once 'DB/common.php';/*** The methods PEAR DB uses to interact with PHP's sybase extension* for interacting with Sybase databases** These methods overload the ones declared in DB_common.** WARNING: This driver may fail with multiple connections under the* same user/pass/host and different databases.** @category Database* @package DB* @author Sterling Hughes <sterling@php.net>* @author Antônio Carlos Venâncio Júnior <floripa@php.net>* @author Daniel Convissor <danielc@php.net>* @copyright 1997-2007 The PHP Group* @license http://www.php.net/license/3_0.txt PHP License 3.0* @version Release: 1.7.14RC1* @link http://pear.php.net/package/DB*/class DB_sybase extends DB_common{// {{{ properties/*** The DB driver type (mysql, oci8, odbc, etc.)* @var string*/var $phptype = 'sybase';/*** The database syntax variant to be used (db2, access, etc.), if any* @var string*/var $dbsyntax = 'sybase';/*** The capabilities of this DB implementation** The 'new_link' element contains the PHP version that first provided* new_link support for this DBMS. Contains false if it's unsupported.** Meaning of the 'limit' element:* + 'emulate' = emulate with fetch row by number* + 'alter' = alter the query* + false = skip rows** @var array*/var $features = array('limit' => 'emulate','new_link' => false,'numrows' => true,'pconnect' => true,'prepare' => false,'ssl' => false,'transactions' => true,);/*** A mapping of native error codes to DB error codes* @var array*/var $errorcode_map = array();/*** The raw database connection created by PHP* @var resource*/var $connection;/*** The DSN information for connecting to a database* @var array*/var $dsn = array();/*** Should data manipulation queries be committed automatically?* @var bool* @access private*/var $autocommit = true;/*** The quantity of transactions begun** {@internal While this is private, it can't actually be designated* private in PHP 5 because it is directly accessed in the test suite.}}** @var integer* @access private*/var $transaction_opcount = 0;/*** The database specified in the DSN** It's a fix to allow calls to different databases in the same script.** @var string* @access private*/var $_db = '';// }}}// {{{ constructor/*** This constructor calls <kbd>$this->DB_common()</kbd>** @return void*/function DB_sybase(){$this->DB_common();}// }}}// {{{ connect()/*** Connect to the database server, log in and open the database** Don't call this method directly. Use DB::connect() instead.** PEAR DB's sybase driver supports the following extra DSN options:* + appname The application name to use on this connection.* Available since PEAR DB 1.7.0.* + charset The character set to use on this connection.* Available since PEAR DB 1.7.0.** @param array $dsn the data source name* @param bool $persistent should the connection be persistent?** @return int DB_OK on success. A DB_Error object on failure.*/function connect($dsn, $persistent = false){if (!PEAR::loadExtension('sybase') &&!PEAR::loadExtension('sybase_ct')){return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);}$this->dsn = $dsn;if ($dsn['dbsyntax']) {$this->dbsyntax = $dsn['dbsyntax'];}$dsn['hostspec'] = $dsn['hostspec'] ? $dsn['hostspec'] : 'localhost';$dsn['password'] = !empty($dsn['password']) ? $dsn['password'] : false;$dsn['charset'] = isset($dsn['charset']) ? $dsn['charset'] : false;$dsn['appname'] = isset($dsn['appname']) ? $dsn['appname'] : false;$connect_function = $persistent ? 'sybase_pconnect' : 'sybase_connect';if ($dsn['username']) {$this->connection = @$connect_function($dsn['hostspec'],$dsn['username'],$dsn['password'],$dsn['charset'],$dsn['appname']);} else {return $this->raiseError(DB_ERROR_CONNECT_FAILED,null, null, null,'The DSN did not contain a username.');}if (!$this->connection) {return $this->raiseError(DB_ERROR_CONNECT_FAILED,null, null, null,@sybase_get_last_message());}if ($dsn['database']) {if (!@sybase_select_db($dsn['database'], $this->connection)) {return $this->raiseError(DB_ERROR_NODBSELECTED,null, null, null,@sybase_get_last_message());}$this->_db = $dsn['database'];}return DB_OK;}// }}}// {{{ disconnect()/*** Disconnects from the database server** @return bool TRUE on success, FALSE on failure*/function disconnect(){$ret = @sybase_close($this->connection);$this->connection = null;return $ret;}// }}}// {{{ simpleQuery()/*** Sends a query to the database server** @param string the SQL query string** @return mixed + a PHP result resrouce for successful SELECT queries* + the DB_OK constant for other successful queries* + a DB_Error object on failure*/function simpleQuery($query){$ismanip = $this->_checkManip($query);$this->last_query = $query;if ($this->_db && !@sybase_select_db($this->_db, $this->connection)) {return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED);}$query = $this->modifyQuery($query);if (!$this->autocommit && $ismanip) {if ($this->transaction_opcount == 0) {$result = @sybase_query('BEGIN TRANSACTION', $this->connection);if (!$result) {return $this->sybaseRaiseError();}}$this->transaction_opcount++;}$result = @sybase_query($query, $this->connection);if (!$result) {return $this->sybaseRaiseError();}if (is_resource($result)) {return $result;}// Determine which queries that should return data, and which// should return an error code only.return $ismanip ? DB_OK : $result;}// }}}// {{{ nextResult()/*** Move the internal sybase result pointer to the next available result** @param a valid sybase result resource** @access public** @return true if a result is available otherwise return false*/function nextResult($result){return false;}// }}}// {{{ fetchInto()/*** Places a row from the result set into the given array** Formating of the array and the data therein are configurable.* See DB_result::fetchInto() for more information.** This method is not meant to be called directly. Use* DB_result::fetchInto() instead. It can't be declared "protected"* because DB_result is a separate object.** @param resource $result the query result resource* @param array $arr the referenced array to put the data in* @param int $fetchmode how the resulting array should be indexed* @param int $rownum the row number to fetch (0 = first row)** @return mixed DB_OK on success, NULL when the end of a result set is* reached or on failure** @see DB_result::fetchInto()*/function fetchInto($result, &$arr, $fetchmode, $rownum = null){if ($rownum !== null) {if (!@sybase_data_seek($result, $rownum)) {return null;}}if ($fetchmode & DB_FETCHMODE_ASSOC) {if (function_exists('sybase_fetch_assoc')) {$arr = @sybase_fetch_assoc($result);} else {if ($arr = @sybase_fetch_array($result)) {foreach ($arr as $key => $value) {if (is_int($key)) {unset($arr[$key]);}}}}if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {$arr = array_change_key_case($arr, CASE_LOWER);}} else {$arr = @sybase_fetch_row($result);}if (!$arr) {return null;}if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {$this->_rtrimArrayValues($arr);}if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) {$this->_convertNullArrayValuesToEmpty($arr);}return DB_OK;}// }}}// {{{ freeResult()/*** Deletes the result set and frees the memory occupied by the result set** This method is not meant to be called directly. Use* DB_result::free() instead. It can't be declared "protected"* because DB_result is a separate object.** @param resource $result PHP's query result resource** @return bool TRUE on success, FALSE if $result is invalid** @see DB_result::free()*/function freeResult($result){return is_resource($result) ? sybase_free_result($result) : false;}// }}}// {{{ numCols()/*** Gets the number of columns in a result set** This method is not meant to be called directly. Use* DB_result::numCols() instead. It can't be declared "protected"* because DB_result is a separate object.** @param resource $result PHP's query result resource** @return int the number of columns. A DB_Error object on failure.** @see DB_result::numCols()*/function numCols($result){$cols = @sybase_num_fields($result);if (!$cols) {return $this->sybaseRaiseError();}return $cols;}// }}}// {{{ numRows()/*** Gets the number of rows in a result set** This method is not meant to be called directly. Use* DB_result::numRows() instead. It can't be declared "protected"* because DB_result is a separate object.** @param resource $result PHP's query result resource** @return int the number of rows. A DB_Error object on failure.** @see DB_result::numRows()*/function numRows($result){$rows = @sybase_num_rows($result);if ($rows === false) {return $this->sybaseRaiseError();}return $rows;}// }}}// {{{ affectedRows()/*** Determines the number of rows affected by a data maniuplation query** 0 is returned for queries that don't manipulate data.** @return int the number of rows. A DB_Error object on failure.*/function affectedRows(){if ($this->_last_query_manip) {$result = @sybase_affected_rows($this->connection);} else {$result = 0;}return $result;}// }}}// {{{ nextId()/*** Returns the next free id in a sequence** @param string $seq_name name of the sequence* @param boolean $ondemand when true, the seqence is automatically* created if it does not exist** @return int the next id number in the sequence.* A DB_Error object on failure.** @see DB_common::nextID(), DB_common::getSequenceName(),* DB_sybase::createSequence(), DB_sybase::dropSequence()*/function nextId($seq_name, $ondemand = true){$seqname = $this->getSequenceName($seq_name);if ($this->_db && !@sybase_select_db($this->_db, $this->connection)) {return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED);}$repeat = 0;do {$this->pushErrorHandling(PEAR_ERROR_RETURN);$result = $this->query("INSERT INTO $seqname (vapor) VALUES (0)");$this->popErrorHandling();if ($ondemand && DB::isError($result) &&($result->getCode() == DB_ERROR || $result->getCode() == DB_ERROR_NOSUCHTABLE)){$repeat = 1;$result = $this->createSequence($seq_name);if (DB::isError($result)) {return $this->raiseError($result);}} elseif (!DB::isError($result)) {$result = $this->query("SELECT @@IDENTITY FROM $seqname");$repeat = 0;} else {$repeat = false;}} while ($repeat);if (DB::isError($result)) {return $this->raiseError($result);}$result = $result->fetchRow(DB_FETCHMODE_ORDERED);return $result[0];}/*** Creates a new sequence** @param string $seq_name name of the new sequence** @return int DB_OK on success. A DB_Error object on failure.** @see DB_common::createSequence(), DB_common::getSequenceName(),* DB_sybase::nextID(), DB_sybase::dropSequence()*/function createSequence($seq_name){return $this->query('CREATE TABLE '. $this->getSequenceName($seq_name). ' (id numeric(10, 0) IDENTITY NOT NULL,'. ' vapor int NULL)');}// }}}// {{{ dropSequence()/*** Deletes a sequence** @param string $seq_name name of the sequence to be deleted** @return int DB_OK on success. A DB_Error object on failure.** @see DB_common::dropSequence(), DB_common::getSequenceName(),* DB_sybase::nextID(), DB_sybase::createSequence()*/function dropSequence($seq_name){return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name));}// }}}// {{{ quoteFloat()/*** Formats a float value for use within a query in a locale-independent* manner.** @param float the float value to be quoted.* @return string the quoted string.* @see DB_common::quoteSmart()* @since Method available since release 1.7.8.*/function quoteFloat($float) {return $this->escapeSimple(str_replace(',', '.', strval(floatval($float))));}// }}}// {{{ autoCommit()/*** Enables or disables automatic commits** @param bool $onoff true turns it on, false turns it off** @return int DB_OK on success. A DB_Error object if the driver* doesn't support auto-committing transactions.*/function autoCommit($onoff = false){// XXX if $this->transaction_opcount > 0, we should probably// issue a warning here.$this->autocommit = $onoff ? true : false;return DB_OK;}// }}}// {{{ commit()/*** Commits the current transaction** @return int DB_OK on success. A DB_Error object on failure.*/function commit(){if ($this->transaction_opcount > 0) {if ($this->_db && !@sybase_select_db($this->_db, $this->connection)) {return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED);}$result = @sybase_query('COMMIT', $this->connection);$this->transaction_opcount = 0;if (!$result) {return $this->sybaseRaiseError();}}return DB_OK;}// }}}// {{{ rollback()/*** Reverts the current transaction** @return int DB_OK on success. A DB_Error object on failure.*/function rollback(){if ($this->transaction_opcount > 0) {if ($this->_db && !@sybase_select_db($this->_db, $this->connection)) {return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED);}$result = @sybase_query('ROLLBACK', $this->connection);$this->transaction_opcount = 0;if (!$result) {return $this->sybaseRaiseError();}}return DB_OK;}// }}}// {{{ sybaseRaiseError()/*** Produces a DB_Error object regarding the current problem** @param int $errno if the error is being manually raised pass a* DB_ERROR* constant here. If this isn't passed* the error information gathered from the DBMS.** @return object the DB_Error object** @see DB_common::raiseError(),* DB_sybase::errorNative(), DB_sybase::errorCode()*/function sybaseRaiseError($errno = null){$native = $this->errorNative();if ($errno === null) {$errno = $this->errorCode($native);}return $this->raiseError($errno, null, null, null, $native);}// }}}// {{{ errorNative()/*** Gets the DBMS' native error message produced by the last query** @return string the DBMS' error message*/function errorNative(){return @sybase_get_last_message();}// }}}// {{{ errorCode()/*** Determines PEAR::DB error code from the database's text error message.** @param string $errormsg error message returned from the database* @return integer an error number from a DB error constant*/function errorCode($errormsg){static $error_regexps;// PHP 5.2+ prepends the function name to $php_errormsg, so we need// this hack to work around it, per bug #9599.$errormsg = preg_replace('/^sybase[a-z_]+\(\): /', '', $errormsg);if (!isset($error_regexps)) {$error_regexps = array('/Incorrect syntax near/'=> DB_ERROR_SYNTAX,'/^Unclosed quote before the character string [\"\'].*[\"\']\./'=> DB_ERROR_SYNTAX,'/Implicit conversion (from datatype|of NUMERIC value)/i'=> DB_ERROR_INVALID_NUMBER,'/Cannot drop the table [\"\'].+[\"\'], because it doesn\'t exist in the system catalogs\./'=> DB_ERROR_NOSUCHTABLE,'/Only the owner of object [\"\'].+[\"\'] or a user with System Administrator \(SA\) role can run this command\./'=> DB_ERROR_ACCESS_VIOLATION,'/^.+ permission denied on object .+, database .+, owner .+/'=> DB_ERROR_ACCESS_VIOLATION,'/^.* permission denied, database .+, owner .+/'=> DB_ERROR_ACCESS_VIOLATION,'/[^.*] not found\./'=> DB_ERROR_NOSUCHTABLE,'/There is already an object named/'=> DB_ERROR_ALREADY_EXISTS,'/Invalid column name/'=> DB_ERROR_NOSUCHFIELD,'/does not allow null values/'=> DB_ERROR_CONSTRAINT_NOT_NULL,'/Command has been aborted/'=> DB_ERROR_CONSTRAINT,'/^Cannot drop the index .* because it doesn\'t exist/i'=> DB_ERROR_NOT_FOUND,'/^There is already an index/i'=> DB_ERROR_ALREADY_EXISTS,'/^There are fewer columns in the INSERT statement than values specified/i'=> DB_ERROR_VALUE_COUNT_ON_ROW,'/Divide by zero/i'=> DB_ERROR_DIVZERO,);}foreach ($error_regexps as $regexp => $code) {if (preg_match($regexp, $errormsg)) {return $code;}}return DB_ERROR;}// }}}// {{{ tableInfo()/*** Returns information about a table or a result set** NOTE: only supports 'table' and 'flags' if <var>$result</var>* is a table name.** @param object|string $result DB_result object from a query or a* string containing the name of a table.* While this also accepts a query result* resource identifier, this behavior is* deprecated.* @param int $mode a valid tableInfo mode** @return array an associative array with the information requested.* A DB_Error object on failure.** @see DB_common::tableInfo()* @since Method available since Release 1.6.0*/function tableInfo($result, $mode = null){if (is_string($result)) {/** Probably received a table name.* Create a result resource identifier.*/if ($this->_db && !@sybase_select_db($this->_db, $this->connection)) {return $this->sybaseRaiseError(DB_ERROR_NODBSELECTED);}$id = @sybase_query("SELECT * FROM $result WHERE 1=0",$this->connection);$got_string = true;} elseif (isset($result->result)) {/** Probably received a result object.* Extract the result resource identifier.*/$id = $result->result;$got_string = false;} else {/** Probably received a result resource identifier.* Copy it.* Deprecated. Here for compatibility only.*/$id = $result;$got_string = false;}if (!is_resource($id)) {return $this->sybaseRaiseError(DB_ERROR_NEED_MORE_DATA);}if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {$case_func = 'strtolower';} else {$case_func = 'strval';}$count = @sybase_num_fields($id);$res = array();if ($mode) {$res['num_fields'] = $count;}for ($i = 0; $i < $count; $i++) {$f = @sybase_fetch_field($id, $i);// column_source is often blank$res[$i] = array('table' => $got_string? $case_func($result): $case_func($f->column_source),'name' => $case_func($f->name),'type' => $f->type,'len' => $f->max_length,'flags' => '',);if ($res[$i]['table']) {$res[$i]['flags'] = $this->_sybase_field_flags($res[$i]['table'], $res[$i]['name']);}if ($mode & DB_TABLEINFO_ORDER) {$res['order'][$res[$i]['name']] = $i;}if ($mode & DB_TABLEINFO_ORDERTABLE) {$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;}}// free the result only if we were called on a tableif ($got_string) {@sybase_free_result($id);}return $res;}// }}}// {{{ _sybase_field_flags()/*** Get the flags for a field** Currently supports:* + <samp>unique_key</samp> (unique index, unique check or primary_key)* + <samp>multiple_key</samp> (multi-key index)** @param string $table the table name* @param string $column the field name** @return string space delimited string of flags. Empty string if none.** @access private*/function _sybase_field_flags($table, $column){static $tableName = null;static $flags = array();if ($table != $tableName) {$flags = array();$tableName = $table;/* We're running sp_helpindex directly because it doesn't exist in* older versions of ASE -- unfortunately, we can't just use* DB::isError() because the user may be using callback error* handling. */$res = @sybase_query("sp_helpindex $table", $this->connection);if ($res === false || $res === true) {// Fake a valid response for BC reasons.return '';}while (($val = sybase_fetch_assoc($res)) !== false) {if (!isset($val['index_keys'])) {/* No useful information returned. Break and be done with* it, which preserves the pre-1.7.9 behaviour. */break;}$keys = explode(', ', trim($val['index_keys']));if (sizeof($keys) > 1) {foreach ($keys as $key) {$this->_add_flag($flags[$key], 'multiple_key');}}if (strpos($val['index_description'], 'unique')) {foreach ($keys as $key) {$this->_add_flag($flags[$key], 'unique_key');}}}sybase_free_result($res);}if (array_key_exists($column, $flags)) {return(implode(' ', $flags[$column]));}return '';}// }}}// {{{ _add_flag()/*** Adds a string to the flags array if the flag is not yet in there* - if there is no flag present the array is created** @param array $array reference of flags array to add a value to* @param mixed $value value to add to the flag array** @return void** @access private*/function _add_flag(&$array, $value){if (!is_array($array)) {$array = array($value);} elseif (!in_array($value, $array)) {array_push($array, $value);}}// }}}// {{{ getSpecialQuery()/*** Obtains the query string needed for listing a given type of objects** @param string $type the kind of objects you want to retrieve** @return string the SQL query string or null if the driver doesn't* support the object type requested** @access protected* @see DB_common::getListOf()*/function getSpecialQuery($type){switch ($type) {case 'tables':return "SELECT name FROM sysobjects WHERE type = 'U'". ' ORDER BY name';case 'views':return "SELECT name FROM sysobjects WHERE type = 'V'";default:return null;}}// }}}}/** Local variables:* tab-width: 4* c-basic-offset: 4* End:*/?>