<?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 1.87 2007/09/21 13:40:42 aharvey 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']] = $i; } } // free the result only if we were called on a table if ($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: */ ?>