Rev 443 | Blame | Compare with Previous | Last modification | View Log | RSS feed
<?php/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: *//*** The PEAR DB driver for PHP's ifx extension* for interacting with Informix 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 Tomas V.V.Cox <cox@idecnet.com>* @author Daniel Convissor <danielc@php.net>* @copyright 1997-2005 The PHP Group* @license http://www.php.net/license/3_0.txt PHP License 3.0* @version CVS: $Id: ifx.php,v 1.3 2006-12-14 15:04:28 jp_milcent 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 ifx extension* for interacting with Informix databases** These methods overload the ones declared in DB_common.** More info on Informix errors can be found at:* http://www.informix.com/answers/english/ierrors.htm** TODO:* - set needed env Informix vars on connect* - implement native prepare/execute** @category Database* @package DB* @author Tomas V.V.Cox <cox@idecnet.com>* @author Daniel Convissor <danielc@php.net>* @copyright 1997-2005 The PHP Group* @license http://www.php.net/license/3_0.txt PHP License 3.0* @version Release: 1.7.6* @link http://pear.php.net/package/DB*/class DB_ifx extends DB_common{// {{{ properties/*** The DB driver type (mysql, oci8, odbc, etc.)* @var string*/var $phptype = 'ifx';/*** The database syntax variant to be used (db2, access, etc.), if any* @var string*/var $dbsyntax = 'ifx';/*** 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' => 'emulate','pconnect' => true,'prepare' => false,'ssl' => false,'transactions' => true,);/*** A mapping of native error codes to DB error codes* @var array*/var $errorcode_map = array('-201' => DB_ERROR_SYNTAX,'-206' => DB_ERROR_NOSUCHTABLE,'-217' => DB_ERROR_NOSUCHFIELD,'-236' => DB_ERROR_VALUE_COUNT_ON_ROW,'-239' => DB_ERROR_CONSTRAINT,'-253' => DB_ERROR_SYNTAX,'-292' => DB_ERROR_CONSTRAINT_NOT_NULL,'-310' => DB_ERROR_ALREADY_EXISTS,'-316' => DB_ERROR_ALREADY_EXISTS,'-319' => DB_ERROR_NOT_FOUND,'-329' => DB_ERROR_NODBSELECTED,'-346' => DB_ERROR_CONSTRAINT,'-386' => DB_ERROR_CONSTRAINT_NOT_NULL,'-391' => DB_ERROR_CONSTRAINT_NOT_NULL,'-554' => DB_ERROR_SYNTAX,'-691' => DB_ERROR_CONSTRAINT,'-692' => DB_ERROR_CONSTRAINT,'-703' => DB_ERROR_CONSTRAINT_NOT_NULL,'-1204' => DB_ERROR_INVALID_DATE,'-1205' => DB_ERROR_INVALID_DATE,'-1206' => DB_ERROR_INVALID_DATE,'-1209' => DB_ERROR_INVALID_DATE,'-1210' => DB_ERROR_INVALID_DATE,'-1212' => DB_ERROR_INVALID_DATE,'-1213' => DB_ERROR_INVALID_NUMBER,);/*** 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 number of rows affected by a data manipulation query* @var integer* @access private*/var $affected = 0;// }}}// {{{ constructor/*** This constructor calls <kbd>$this->DB_common()</kbd>** @return void*/function DB_ifx(){$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.** @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('informix') &&!PEAR::loadExtension('Informix')){return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);}$this->dsn = $dsn;if ($dsn['dbsyntax']) {$this->dbsyntax = $dsn['dbsyntax'];}$dbhost = $dsn['hostspec'] ? '@' . $dsn['hostspec'] : '';$dbname = $dsn['database'] ? $dsn['database'] . $dbhost : '';$user = $dsn['username'] ? $dsn['username'] : '';$pw = $dsn['password'] ? $dsn['password'] : '';$connect_function = $persistent ? 'ifx_pconnect' : 'ifx_connect';$this->connection = @$connect_function($dbname, $user, $pw);if (!is_resource($this->connection)) {return $this->ifxRaiseError(DB_ERROR_CONNECT_FAILED);}return DB_OK;}// }}}// {{{ disconnect()/*** Disconnects from the database server** @return bool TRUE on success, FALSE on failure*/function disconnect(){$ret = @ifx_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){$ismanip = DB::isManip($query);$this->last_query = $query;$this->affected = null;if (preg_match('/(SELECT)/i', $query)) { //TESTME: Use !DB::isManip()?// the scroll is needed for fetching absolute row numbers// in a select query result$result = @ifx_query($query, $this->connection, IFX_SCROLL);} else {if (!$this->autocommit && $ismanip) {if ($this->transaction_opcount == 0) {$result = @ifx_query('BEGIN WORK', $this->connection);if (!$result) {return $this->ifxRaiseError();}}$this->transaction_opcount++;}$result = @ifx_query($query, $this->connection);}if (!$result) {return $this->ifxRaiseError();}$this->affected = @ifx_affected_rows($result);// Determine which queries should return data, and which// should return an error code only.if (preg_match('/(SELECT)/i', $query)) {return $result;}// XXX Testme: free results inside a transaction// may cause to stop it and commit the work?// Result has to be freed even with a insert or update@ifx_free_result($result);return DB_OK;}// }}}// {{{ nextResult()/*** Move the internal ifx result pointer to the next available result** @param a valid fbsql result resource** @access public** @return true if a result is available otherwise return false*/function nextResult($result){return false;}// }}}// {{{ affectedRows()/*** Determines the number of rows affected by a data maniuplation query** 0 is returned for queries that don't manipulate data.** @return int the number of rows. A DB_Error object on failure.*/function affectedRows(){if (DB::isManip($this->last_query)) {return $this->affected;} else {return 0;}}// }}}// {{{ 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) && ($rownum < 0)) {return null;}if ($rownum === null) {/** Even though fetch_row() should return the next row if* $rownum is null, it doesn't in all cases. Bug 598.*/$rownum = 'NEXT';} else {// Index starts at row 1, unlike most DBMS's starting at 0.$rownum++;}if (!$arr = @ifx_fetch_row($result, $rownum)) {return null;}if ($fetchmode !== DB_FETCHMODE_ASSOC) {$i=0;$order = array();foreach ($arr as $val) {$order[$i++] = $val;}$arr = $order;} elseif ($fetchmode == DB_FETCHMODE_ASSOC &&$this->options['portability'] & DB_PORTABILITY_LOWERCASE){$arr = array_change_key_case($arr, CASE_LOWER);}if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {$this->_rtrimArrayValues($arr);}if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) {$this->_convertNullArrayValuesToEmpty($arr);}return DB_OK;}// }}}// {{{ 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){if (!$cols = @ifx_num_fields($result)) {return $this->ifxRaiseError();}return $cols;}// }}}// {{{ 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 @ifx_free_result($result);}// }}}// {{{ 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 = true){// 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) {$result = @ifx_query('COMMIT WORK', $this->connection);$this->transaction_opcount = 0;if (!$result) {return $this->ifxRaiseError();}}return DB_OK;}// }}}// {{{ rollback()/*** Reverts the current transaction** @return int DB_OK on success. A DB_Error object on failure.*/function rollback(){if ($this->transaction_opcount > 0) {$result = @ifx_query('ROLLBACK WORK', $this->connection);$this->transaction_opcount = 0;if (!$result) {return $this->ifxRaiseError();}}return DB_OK;}// }}}// {{{ ifxRaiseError()/*** Produces a DB_Error object regarding the current problem** @param int $errno if the error is being manually raised pass a* DB_ERROR* constant here. If this isn't passed* the error information gathered from the DBMS.** @return object the DB_Error object** @see DB_common::raiseError(),* DB_ifx::errorNative(), DB_ifx::errorCode()*/function ifxRaiseError($errno = null){if ($errno === null) {$errno = $this->errorCode(ifx_error());}return $this->raiseError($errno, null, null, null,$this->errorNative());}// }}}// {{{ errorNative()/*** Gets the DBMS' native error code and message produced by the last query** @return string the DBMS' error code and message*/function errorNative(){return @ifx_error() . ' ' . @ifx_errormsg();}// }}}// {{{ errorCode()/*** Maps native error codes to DB's portable ones.** Requires that the DB implementation's constructor fills* in the <var>$errorcode_map</var> property.** @param string $nativecode error code returned by the database* @return int a portable DB error code, or DB_ERROR if this DB* implementation has no mapping for the given error code.*/function errorCode($nativecode){if (ereg('SQLCODE=(.*)]', $nativecode, $match)) {$code = $match[1];if (isset($this->errorcode_map[$code])) {return $this->errorcode_map[$code];}}return DB_ERROR;}// }}}// {{{ tableInfo()/*** Returns information about a table or a result set** NOTE: only supports 'table' if <var>$result</var> is a table name.** If analyzing a query result and the result has duplicate field names,* an error will be raised saying* <samp>can't distinguish duplicate field names</samp>.** @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.*/$id = @ifx_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.*/$id = $result;$got_string = false;}if (!is_resource($id)) {return $this->ifxRaiseError(DB_ERROR_NEED_MORE_DATA);}$flds = @ifx_fieldproperties($id);$count = @ifx_num_fields($id);if (count($flds) != $count) {return $this->raiseError("can't distinguish duplicate field names");}if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {$case_func = 'strtolower';} else {$case_func = 'strval';}$i = 0;$res = array();if ($mode) {$res['num_fields'] = $count;}foreach ($flds as $key => $value) {$props = explode(';', $value);$res[$i] = array('table' => $got_string ? $case_func($result) : '','name' => $case_func($key),'type' => $props[0],'len' => $props[1],'flags' => $props[4] == 'N' ? 'not_null' : '',);if ($mode & DB_TABLEINFO_ORDER) {$res['order'][$res[$i]['name']] = $i;}if ($mode & DB_TABLEINFO_ORDERTABLE) {$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;}$i++;}// free the result only if we were called on a tableif ($got_string) {@ifx_free_result($id);}return $res;}// }}}// {{{ 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 tabname FROM systables WHERE tabid >= 100';default:return null;}}// }}}}/** Local variables:* tab-width: 4* c-basic-offset: 4* End:*/?>