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<?php |
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// |
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// +----------------------------------------------------------------------+ |
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// | PHP Version 4 | |
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// +----------------------------------------------------------------------+ |
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// | Copyright (c) 1997-2002 The PHP Group | |
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// +----------------------------------------------------------------------+ |
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// | This source file is subject to version 2.02 of the PHP license, | |
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// | that is bundled with this package in the file LICENSE, and is | |
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// | available at through the world-wide-web at | |
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// | http://www.php.net/license/2_02.txt. | |
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// | If you did not receive a copy of the PHP license and are unable to | |
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// | obtain it through the world-wide-web, please send a note to | |
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// | license@php.net so we can mail you a copy immediately. | |
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// +----------------------------------------------------------------------+ |
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// | Author: Tomas V.V.Cox <cox@idecnet.com> | |
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// +----------------------------------------------------------------------+ |
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// |
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// $Id: ifx.php,v 1.18 2002/02/28 08:27:09 sebastian Exp $ |
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// |
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// Database independent query interface definition for PHP's Informix |
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// extension. |
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// |
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|
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// Legend: |
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// For more info on Informix errors see: |
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// http://www.informix.com/answers/english/ierrors.htm |
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// |
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// TODO: |
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// - set needed env Informix vars on connect |
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// - implement native prepare/execute |
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|
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require_once 'DB/common.php'; |
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|
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class DB_ifx extends DB_common |
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{ |
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var $connection; |
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var $affected = 0; |
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var $dsn = array(); |
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var $fetchmode = DB_FETCHMODE_ORDERED; /* Default fetch mode */ |
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|
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function DB_ifx() |
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{ |
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$this->phptype = 'ifx'; |
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$this->dbsyntax = 'ifx'; |
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$this->features = array( |
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'prepare' => false, |
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'pconnect' => true, |
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'transactions' => false, |
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'limit' => 'emulate' |
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); |
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$this->errorcode_map = array( |
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'-201' => DB_ERROR_SYNTAX, |
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'-206' => DB_ERROR_NOSUCHTABLE, |
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'-217' => DB_ERROR_NOSUCHFIELD, |
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'-329' => DB_ERROR_NODBSELECTED, |
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'-1204' => DB_ERROR_INVALID_DATE, |
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'-1205' => DB_ERROR_INVALID_DATE, |
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'-1206' => DB_ERROR_INVALID_DATE, |
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'-1209' => DB_ERROR_INVALID_DATE, |
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'-1210' => DB_ERROR_INVALID_DATE, |
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'-1212' => DB_ERROR_INVALID_DATE |
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); |
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} |
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|
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/** |
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* Connect to a database and log in as the specified user. |
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* |
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* @param $dsn the data source name (see DB::parseDSN for syntax) |
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* @param $persistent (optional) whether the connection should |
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* be persistent |
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* |
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* @return int DB_OK on success, a DB error code on failure |
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*/ |
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function connect(&$dsninfo, $persistent = false) |
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{ |
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if (!DB::assertExtension('informix')) |
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return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND); |
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|
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$this->dsn = $dsninfo; |
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$dbhost = $dsninfo['hostspec'] ? '@' . $dsninfo['hostspec'] : ''; |
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$dbname = $dsninfo['database'] ? $dsninfo['database'] . $dbhost : ''; |
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$user = $dsninfo['username'] ? $dsninfo['username'] : ''; |
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$pw = $dsninfo['password'] ? $dsninfo['password'] : ''; |
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|
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$connect_function = $persistent ? 'ifx_pconnect' : 'ifx_connect'; |
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|
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$this->connection = @$connect_function($dbname, $user, $pw); |
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if (!is_resource($this->connection)) { |
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return $this->ifxraiseError(DB_ERROR_CONNECT_FAILED); |
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} |
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return DB_OK; |
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} |
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|
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/** |
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* Log out and disconnect from the database. |
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* |
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* @return bool TRUE on success, FALSE if not connected. |
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*/ |
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function disconnect() |
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{ |
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$ret = @ifx_close($this->connection); |
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$this->connection = null; |
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return $ret; |
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} |
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|
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/** |
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* Send a query to Informix and return the results as a |
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* Informix resource identifier. |
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* |
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* @param $query the SQL query |
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* |
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* @return int returns a valid Informix result for successful SELECT |
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* queries, DB_OK for other successful queries. A DB error code |
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* is returned on failure. |
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*/ |
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function simpleQuery($query) |
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{ |
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$this->last_query = $query; |
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if (preg_match('/(SELECT)/i', $query)) { //TESTME: Use !DB::isManip()? |
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// the scroll is needed for fetching absolute row numbers |
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// in a select query result |
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$result = @ifx_query($query, $this->connection, IFX_SCROLL); |
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} else { |
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$result = @ifx_query($query, $this->connection); |
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} |
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if (!$result) { |
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return $this->ifxraiseError(); |
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} |
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$this->affected = ifx_affected_rows ($result); |
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// Determine which queries that should return data, and which |
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// should return an error code only. |
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if (preg_match('/(SELECT)/i', $query)) { |
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return $result; |
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} |
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return DB_OK; |
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} |
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|
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// {{{ nextResult() |
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|
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/** |
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* Move the internal ifx result pointer to the next available result |
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* |
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* @param a valid fbsql result resource |
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* |
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* @access public |
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* |
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* @return true if a result is available otherwise return false |
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*/ |
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function nextResult($result) |
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{ |
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return false; |
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} |
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|
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// }}} |
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|
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/** |
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* Gets the number of rows affected by the last query. |
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* if the last query was a select, returns an _estimate_ value. |
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* |
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* @return number of rows affected by the last query |
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*/ |
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function affectedRows() |
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{ |
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return $this->affected; |
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} |
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|
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/** |
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* Fetch and return a row of data (it uses fetchInto for that) |
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* @param $result Informix result identifier |
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* @param $fetchmode format of fetched row array |
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* @param $rownum the absolute row number to fetch |
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* |
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* @return array a row of data, or false on error |
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*/ |
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function fetchRow($result, $fetchmode = DB_FETCHMODE_DEFAULT, $rownum=null) |
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{ |
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if ($fetchmode == DB_FETCHMODE_DEFAULT) { |
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$fetchmode = $this->fetchmode; |
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} |
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$res = $this->fetchInto ($result, $arr, $fetchmode, $rownum); |
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if ($res !== DB_OK) { |
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return $res; |
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} |
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return $arr; |
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} |
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|
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/** |
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* Fetch a row and return as array. |
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* |
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* @param $result Informix result identifier |
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* @param $row (reference) array where data from the row is stored |
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* @param $fetchmode how the resulting array should be indexed |
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* @param $rownum the row number to fetch |
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* |
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* @return int an array on success, a DB error code on failure, NULL |
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* if there is no more data |
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*/ |
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function fetchInto($result, &$row, $fetchmode, $rownum=null) |
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{ |
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if (($rownum !== null) && ($rownum < 0)) { |
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return null; |
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} |
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// if $rownum is null, fetch row will return the next row |
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if (!$row = @ifx_fetch_row($result, $rownum)) { |
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return null; |
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} |
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if ($fetchmode !== DB_FETCHMODE_ASSOC) { |
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$i=0; |
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$order = array(); |
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foreach ($row as $key => $val) { |
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$order[$i++] = $val; |
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} |
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$row = $order; |
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} |
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return DB_OK; |
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} |
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|
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function numRows($result) |
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{ |
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return $this->raiseError(DB_ERROR_NOT_CAPABLE); |
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} |
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|
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/** |
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* Get the number of columns in a result set. |
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* |
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* @param $result Informix result identifier |
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* |
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* @return int the number of columns per row in $result |
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*/ |
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function numCols($result) |
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{ |
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if (!$cols = @ifx_num_fields($result)) { |
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return $this->ifxraiseError(); |
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} |
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return $cols; |
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} |
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|
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/** |
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* Free the internal resources associated with $result. |
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* |
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* @param $result Informix result identifier |
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* |
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* @return bool TRUE on success, DB_error on error |
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*/ |
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function freeResult($result) |
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{ |
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if (is_resource($result)) { |
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if (!@ifx_free_result($result)) { |
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return $this->ifxraiseError(); |
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} |
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return true; |
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} |
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if (!isset($this->prepare_tokens[(int)$result])) { |
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return false; |
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} |
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unset($this->prepare_tokens[(int)$result]); |
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unset($this->prepare_types[(int)$result]); |
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return true; |
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} |
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|
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function ifxraiseError($errno = null) |
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{ |
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if ($errno === null) { |
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$errno = $this->errorCode(ifx_error()); |
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} |
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|
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return $this->raiseError($errno, null, null, null, |
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$this->errorNative()); |
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} |
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|
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/** |
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* Map native error codes to DB's portable ones. Requires that |
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* the DB implementation's constructor fills in the $errorcode_map |
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* property. |
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* |
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* @return int a portable DB error code, or DB_ERROR if this DB |
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* implementation has no mapping for the given error code. |
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*/ |
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|
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function errorCode($nativecode) |
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{ |
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if (ereg('SQLCODE=(.*)]', $nativecode, $match)) { |
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$code = $match[1]; |
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if (isset($this->errorcode_map[$code])) { |
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return $this->errorcode_map[$code]; |
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} |
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} |
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return DB_ERROR; |
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} |
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|
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/** |
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* Get the native error message of the last error (if any) that |
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* occured on the current connection. |
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* |
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* @return int native Informix error code |
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*/ |
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function errorNative() |
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{ |
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return ifx_error() . ' ' . ifx_errormsg(); |
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} |
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|
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// {{{ getSpecialQuery() |
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|
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/** |
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* Returns the query needed to get some backend info |
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* @param string $type What kind of info you want to retrieve |
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* @return string The SQL query string |
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*/ |
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function getSpecialQuery($type) |
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{ |
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switch ($type) { |
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case 'tables': |
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default: |
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return null; |
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} |
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return $sql; |
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} |
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|
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// }}} |
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} |
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|
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?> |