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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: James L. Pine <jlp@valinux.com> | |
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// +----------------------------------------------------------------------+ |
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// |
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// $Id: oci8.php,v 1.47.2.1 2002/04/09 19:04:15 ssb Exp $ |
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// |
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// Database independent query interface definition for PHP's Oracle 8 |
| 22 |
// call-interface extension. |
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// |
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|
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// |
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// be aware... OCIError() only appears to return anything when given a |
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// statement, so functions return the generic DB_ERROR instead of more |
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// useful errors that have to do with feedback from the database. |
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// |
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|
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|
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require_once 'DB/common.php'; |
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|
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class DB_oci8 extends DB_common |
| 35 |
{ |
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// {{{ properties |
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|
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var $connection; |
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var $phptype, $dbsyntax; |
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var $manip_query = array(); |
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var $prepare_types = array(); |
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var $autoCommit = 1; |
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var $last_stmt = false; |
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|
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// }}} |
| 46 |
// {{{ constructor |
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|
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function DB_oci8() |
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{ |
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$this->DB_common(); |
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$this->phptype = 'oci8'; |
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$this->dbsyntax = 'oci8'; |
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$this->features = array( |
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'prepare' => false, |
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'pconnect' => true, |
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'transactions' => true, |
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'limit' => 'alter' |
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); |
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$this->errorcode_map = array( |
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900 => DB_ERROR_SYNTAX, |
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904 => DB_ERROR_NOSUCHFIELD, |
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923 => DB_ERROR_SYNTAX, |
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942 => DB_ERROR_NOSUCHTABLE, |
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955 => DB_ERROR_ALREADY_EXISTS, |
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1476 => DB_ERROR_DIVZERO, |
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1722 => DB_ERROR_INVALID_NUMBER, |
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2289 => DB_ERROR_NOSUCHTABLE, |
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2291 => DB_ERROR_CONSTRAINT, |
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2449 => DB_ERROR_CONSTRAINT, |
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); |
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} |
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|
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// }}} |
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// {{{ connect() |
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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('oci8')) { |
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return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND); |
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} |
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$this->dsn = $dsninfo; |
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$user = $dsninfo['username']; |
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$pw = $dsninfo['password']; |
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$hostspec = $dsninfo['hostspec']; |
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|
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$connect_function = $persistent ? 'OCIPLogon' : 'OCILogon'; |
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|
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if ($hostspec) { |
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$conn = @$connect_function($user,$pw,$hostspec); |
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} elseif ($user || $pw) { |
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$conn = @$connect_function($user,$pw); |
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} else { |
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$conn = false; |
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} |
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if ($conn == false) { |
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$error = OCIError(); |
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$error = (is_array($error)) ? $error['message'] : null; |
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return $this->raiseError(DB_ERROR_CONNECT_FAILED, null, null, |
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null, $error); |
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} |
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$this->connection = $conn; |
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return DB_OK; |
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} |
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|
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// }}} |
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// {{{ disconnect() |
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|
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/** |
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* Log out and disconnect from the database. |
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* |
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* @return bool TRUE on success, FALSE if not connected. |
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*/ |
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function disconnect() |
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{ |
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$ret = @OCILogOff($this->connection); |
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$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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// {{{ simpleQuery() |
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|
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/** |
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* Send a query to oracle and return the results as an oci8 resource |
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* identifier. |
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* |
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* @param $query the SQL query |
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* |
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* @return int returns a valid oci8 result for successful SELECT |
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* queries, DB_OK for other successful queries. A DB error code |
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* is returned on failure. |
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*/ |
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function simpleQuery($query) |
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{ |
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$this->last_query = $query; |
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$query = $this->modifyQuery($query); |
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$result = @OCIParse($this->connection, $query); |
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if (!$result) { |
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return $this->oci8RaiseError(); |
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} |
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if ($this->autoCommit) { |
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$success = @OCIExecute($result,OCI_COMMIT_ON_SUCCESS); |
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} else { |
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$success = @OCIExecute($result,OCI_DEFAULT); |
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} |
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if (!$success) { |
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return $this->oci8RaiseError($result); |
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} |
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$this->last_stmt=$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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return DB::isManip($query) ? DB_OK : $result; |
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} |
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|
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// }}} |
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// {{{ nextResult() |
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|
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/** |
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* Move the internal oracle result pointer to the next available result |
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* |
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* @param a valid oci8 result resource |
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* |
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* @access public |
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* |
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* @return true if a result is available otherwise return false |
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*/ |
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function nextResult($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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// {{{ fetchRow() |
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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 oci8 result identifier |
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* @param $fetchmode how the resulting array should be indexed |
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* |
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* @return int an array on success, a DB error code on failure, NULL |
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* if there is no more data |
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*/ |
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function &fetchRow($result, $fetchmode = DB_FETCHMODE_DEFAULT) |
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{ |
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if ($fetchmode == DB_FETCHMODE_DEFAULT) { |
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$fetchmode = $this->fetchmode; |
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} |
| 198 |
if ($fetchmode & DB_FETCHMODE_ASSOC) { |
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$moredata = @OCIFetchInto($result, $row, OCI_ASSOC + OCI_RETURN_NULLS + OCI_RETURN_LOBS); |
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} else { |
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$moredata = @OCIFetchInto($result, $row, OCI_RETURN_NULLS + OCI_RETURN_LOBS); |
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} |
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if (!$moredata) { |
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return NULL; |
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} |
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return $row; |
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} |
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|
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// }}} |
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// {{{ fetchInto() |
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|
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/** |
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* Fetch a row and insert the data into an existing array. |
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* |
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* @param $result oci8 result identifier |
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* @param $arr (reference) array where data from the row is stored |
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* @param $fetchmode how the array data should be indexed |
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* @param $rownum the row number to fetch (not yet supported) |
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* |
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* @return int DB_OK on success, a DB error code on failure |
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*/ |
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function fetchInto($result, &$arr, $fetchmode = DB_FETCHMODE_DEFAULT, $rownum=NULL) |
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{ |
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if ($rownum !== NULL) { |
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return $this->raiseError(DB_ERROR_NOT_CAPABLE); |
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} |
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if ($fetchmode & DB_FETCHMODE_ASSOC) { |
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$moredata = @OCIFetchInto($result,$arr,OCI_ASSOC+OCI_RETURN_NULLS+OCI_RETURN_LOBS); |
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if ($moredata && $this->options['optimize'] == 'portability') { |
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$arr = array_change_key_case($arr, CASE_LOWER); |
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} |
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} else { |
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$moredata = @OCIFetchInto($result,$arr,OCI_RETURN_NULLS+OCI_RETURN_LOBS); |
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} |
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if (!$moredata) { |
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return NULL; |
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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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// {{{ freeResult() |
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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 oci8 result identifier or DB statement identifier |
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* |
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* @return bool TRUE on success, FALSE if $result is invalid |
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*/ |
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function freeResult($result) |
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{ |
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if (is_resource($result)) { |
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return @OCIFreeStatement($result); |
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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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unset($this->manip_query[(int)$result]); |
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return true; |
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} |
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|
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// }}} |
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// {{{ numRows() |
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|
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function numRows($result) |
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{ |
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// emulate numRows for Oracle. yuck. |
| 271 |
if ($this->options['optimize'] == 'portability' && |
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$result === $this->last_stmt) { |
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$countquery = preg_replace('/^\s*SELECT\s+(.*?)\s+FROM\s+/is', |
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'SELECT COUNT(*) FROM ', |
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$this->last_query); |
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$save_query = $this->last_query; |
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$save_stmt = $this->last_stmt; |
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$count = $this->query($countquery); |
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if (DB::isError($count) || |
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DB::isError($row = $count->fetchRow(DB_FETCHMODE_ORDERED))) |
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{ |
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$this->last_query = $save_query; |
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$this->last_stmt = $save_stmt; |
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return $this->raiseError(DB_ERROR_NOT_CAPABLE); |
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} |
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return $row[0]; |
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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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// {{{ numCols() |
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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 oci8 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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$cols = @OCINumCols($result); |
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if (!$cols) { |
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return $this->oci8RaiseError($result); |
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} |
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return $cols; |
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} |
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|
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// }}} |
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// {{{ errorNative() |
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|
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/** |
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* Get the native error code of the last error (if any) that occured |
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* on the current connection. This does not work, as OCIError does |
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* not work unless given a statement. If OCIError does return |
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* something, so will this. |
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* |
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* @return int native oci8 error code |
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*/ |
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function errorNative() |
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{ |
| 323 |
if (is_resource($this->last_stmt)) { |
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$error = @OCIError($this->last_stmt); |
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} else { |
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$error = @OCIError($this->connection); |
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} |
| 328 |
if (is_array($error)) { |
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return $error['code']; |
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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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// {{{ prepare() |
| 336 |
|
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/** |
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* Prepares a query for multiple execution with execute(). With |
| 339 |
* oci8, this is emulated. |
| 340 |
* @param $query query to be prepared |
| 341 |
* |
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* @return DB statement resource |
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*/ |
| 344 |
function prepare($query) |
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{ |
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$tokens = split('[\&\?]', $query); |
| 347 |
$token = 0; |
| 348 |
$types = array(); |
| 349 |
for ($i = 0; $i < strlen($query); $i++) { |
| 350 |
switch ($query[$i]) { |
| 351 |
case '?': |
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$types[$token++] = DB_PARAM_SCALAR; |
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break; |
| 354 |
case '&': |
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$types[$token++] = DB_PARAM_OPAQUE; |
| 356 |
break; |
| 357 |
} |
| 358 |
} |
| 359 |
$binds = sizeof($tokens) - 1; |
| 360 |
$newquery = ''; |
| 361 |
for ($i = 0; $i < $binds; $i++) { |
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$newquery .= $tokens[$i] . ":bind" . $i; |
| 363 |
} |
| 364 |
$newquery .= $tokens[$i]; |
| 365 |
$this->last_query = $query; |
| 366 |
$newquery = $this->modifyQuery($newquery); |
| 367 |
$stmt = @OCIParse($this->connection, $newquery); |
| 368 |
$this->prepare_types[$stmt] = $types; |
| 369 |
$this->manip_query[(int)$stmt] = DB::isManip($query); |
| 370 |
return $stmt; |
| 371 |
} |
| 372 |
|
| 373 |
// }}} |
| 374 |
// {{{ execute() |
| 375 |
|
| 376 |
/** |
| 377 |
* Executes a DB statement prepared with prepare(). |
| 378 |
* |
| 379 |
* @param $stmt a DB statement resource (returned from prepare()) |
| 380 |
* @param $data data to be used in execution of the statement |
| 381 |
* |
| 382 |
* @return int returns an oci8 result resource for successful |
| 383 |
* SELECT queries, DB_OK for other successful queries. A DB error |
| 384 |
* code is returned on failure. |
| 385 |
*/ |
| 386 |
function execute($stmt, $data = false) |
| 387 |
{ |
| 388 |
$types=&$this->prepare_types[$stmt]; |
| 389 |
if (($size = sizeof($types)) != sizeof($data)) { |
| 390 |
return $this->raiseError(DB_ERROR_MISMATCH); |
| 391 |
} |
| 392 |
for ($i = 0; $i < $size; $i++) { |
| 393 |
if (is_array($data)) { |
| 394 |
$pdata[$i] = &$data[$i]; |
| 395 |
} |
| 396 |
else { |
| 397 |
$pdata[$i] = &$data; |
| 398 |
} |
| 399 |
if ($types[$i] == DB_PARAM_OPAQUE) { |
| 400 |
$fp = fopen($pdata[$i], "r"); |
| 401 |
$pdata[$i] = ''; |
| 402 |
if ($fp) { |
| 403 |
while (($buf = fread($fp, 4096)) != false) { |
| 404 |
$pdata[$i] .= $buf; |
| 405 |
} |
| 406 |
} |
| 407 |
} |
| 408 |
if (!@OCIBindByName($stmt, ":bind" . $i, $pdata[$i], -1)) { |
| 409 |
return $this->oci8RaiseError($stmt); |
| 410 |
} |
| 411 |
} |
| 412 |
if ($this->autoCommit) { |
| 413 |
$success = @OCIExecute($stmt, OCI_COMMIT_ON_SUCCESS); |
| 414 |
} |
| 415 |
else { |
| 416 |
$success = @OCIExecute($stmt, OCI_DEFAULT); |
| 417 |
} |
| 418 |
if (!$success) { |
| 419 |
return $this->oci8RaiseError($stmt); |
| 420 |
} |
| 421 |
$this->last_stmt = $stmt; |
| 422 |
if ($this->manip_query[(int)$stmt]) { |
| 423 |
return DB_OK; |
| 424 |
} else { |
| 425 |
return new DB_result($this, $stmt); |
| 426 |
} |
| 427 |
} |
| 428 |
|
| 429 |
// }}} |
| 430 |
// {{{ autoCommit() |
| 431 |
|
| 432 |
/** |
| 433 |
* Enable/disable automatic commits |
| 434 |
* |
| 435 |
* @param $onoff true/false whether to autocommit |
| 436 |
*/ |
| 437 |
function autoCommit($onoff = false) |
| 438 |
{ |
| 439 |
$this->autoCommit = (bool)$onoff;; |
| 440 |
return DB_OK; |
| 441 |
} |
| 442 |
|
| 443 |
// }}} |
| 444 |
// {{{ commit() |
| 445 |
|
| 446 |
/** |
| 447 |
* Commit transactions on the current connection |
| 448 |
* |
| 449 |
* @return DB_ERROR or DB_OK |
| 450 |
*/ |
| 451 |
function commit() |
| 452 |
{ |
| 453 |
$result = @OCICommit($this->connection); |
| 454 |
if (!$result) { |
| 455 |
return $this->oci8RaiseError(); |
| 456 |
} |
| 457 |
return DB_OK; |
| 458 |
} |
| 459 |
|
| 460 |
// }}} |
| 461 |
// {{{ rollback() |
| 462 |
|
| 463 |
/** |
| 464 |
* Roll back all uncommitted transactions on the current connection. |
| 465 |
* |
| 466 |
* @return DB_ERROR or DB_OK |
| 467 |
*/ |
| 468 |
function rollback() |
| 469 |
{ |
| 470 |
$result = @OCIRollback($this->connection); |
| 471 |
if (!$result) { |
| 472 |
return $this->oci8RaiseError(); |
| 473 |
} |
| 474 |
return DB_OK; |
| 475 |
} |
| 476 |
|
| 477 |
// }}} |
| 478 |
// {{{ affectedRows() |
| 479 |
|
| 480 |
/** |
| 481 |
* Gets the number of rows affected by the last query. |
| 482 |
* if the last query was a select, returns 0. |
| 483 |
* |
| 484 |
* @return number of rows affected by the last query or DB_ERROR |
| 485 |
*/ |
| 486 |
function affectedRows() |
| 487 |
{ |
| 488 |
if ($this->last_stmt === false) { |
| 489 |
return $this->oci8RaiseError(); |
| 490 |
} |
| 491 |
$result = @OCIRowCount($this->last_stmt); |
| 492 |
if ($result === false) { |
| 493 |
return $this->oci8RaiseError($this->last_stmt); |
| 494 |
} |
| 495 |
return $result; |
| 496 |
} |
| 497 |
|
| 498 |
// }}} |
| 499 |
// {{{ modifyQuery() |
| 500 |
|
| 501 |
function modifyQuery($query) |
| 502 |
{ |
| 503 |
// "SELECT 2+2" must be "SELECT 2+2 FROM dual" in Oracle |
| 504 |
if (preg_match('/^\s*SELECT/i', $query) && |
| 505 |
!preg_match('/\sFROM\s/i', $query)) { |
| 506 |
$query .= " FROM dual"; |
| 507 |
} |
| 508 |
return $query; |
| 509 |
} |
| 510 |
|
| 511 |
// }}} |
| 512 |
// {{{ modifyLimitQuery() |
| 513 |
|
| 514 |
/** |
| 515 |
* Emulate the row limit support altering the query |
| 516 |
* |
| 517 |
* @param string $query The query to treat |
| 518 |
* @param int $from The row to start to fetch from |
| 519 |
* @param int $count The offset |
| 520 |
* @return string The modified query |
| 521 |
* |
| 522 |
* @author Tomas V.V.Cox <cox@idecnet.com> |
| 523 |
*/ |
| 524 |
function modifyLimitQuery($query, $from, $count) |
| 525 |
{ |
| 526 |
// Let Oracle return the name of the columns instead of |
| 527 |
// coding a "home" SQL parser |
| 528 |
$q_fields = "SELECT * FROM ($query) WHERE NULL = NULL"; |
| 529 |
if (!$result = OCIParse($this->connection, $q_fields)) { |
| 530 |
return $this->oci8RaiseError(); |
| 531 |
} |
| 532 |
if (!OCIExecute($result, OCI_DEFAULT)) { |
| 533 |
return $this->oci8RaiseError($result); |
| 534 |
} |
| 535 |
$ncols = OCINumCols($result); |
| 536 |
$cols = array(); |
| 537 |
for ( $i = 1; $i <= $ncols; $i++ ) { |
| 538 |
$cols[] = OCIColumnName($result, $i); |
| 539 |
} |
| 540 |
$fields = implode(', ', $cols); |
| 541 |
// XXX Test that (tip by John Lim) |
| 542 |
//if(preg_match('/^\s*SELECT\s+/is', $query, $match)) { |
| 543 |
// // Introduce the FIRST_ROWS Oracle query optimizer |
| 544 |
// $query = substr($query, strlen($match[0]), strlen($query)); |
| 545 |
// $query = "SELECT /* +FIRST_ROWS */ " . $query; |
| 546 |
//} |
| 547 |
|
| 548 |
// Construct the query |
| 549 |
// more at: http://marc.theaimsgroup.com/?l=php-db&m=99831958101212&w=2 |
| 550 |
// Perhaps this could be optimized with the use of Unions |
| 551 |
$from += 1; // in Oracle rownum starts at 1 |
| 552 |
$query = "SELECT $fields FROM". |
| 553 |
" (SELECT rownum as linenum, $fields FROM". |
| 554 |
" ($query)". |
| 555 |
" WHERE rownum <= ". ($from + $count) . |
| 556 |
") WHERE linenum >= $from"; |
| 557 |
return $query; |
| 558 |
} |
| 559 |
|
| 560 |
// }}} |
| 561 |
// {{{ nextId() |
| 562 |
|
| 563 |
/** |
| 564 |
* Get the next value in a sequence. We emulate sequences |
| 565 |
* for MySQL. Will create the sequence if it does not exist. |
| 566 |
* |
| 567 |
* @access public |
| 568 |
* |
| 569 |
* @param $seq_name the name of the sequence |
| 570 |
* |
| 571 |
* @param $ondemand whether to create the sequence table on demand |
| 572 |
* (default is true) |
| 573 |
* |
| 574 |
* @return a sequence integer, or a DB error |
| 575 |
*/ |
| 576 |
function nextId($seq_name, $ondemand = true) |
| 577 |
{ |
| 578 |
$seqname = $this->getSequenceName($seq_name); |
| 579 |
$repeat = 0; |
| 580 |
do { |
| 581 |
$this->expectError(DB_ERROR_NOSUCHTABLE); |
| 582 |
$result = $this->query("SELECT ${seqname}.nextval FROM dual"); |
| 583 |
$this->popExpect(); |
| 584 |
if ($ondemand && DB::isError($result) && |
| 585 |
$result->getCode() == DB_ERROR_NOSUCHTABLE) { |
| 586 |
$repeat = 1; |
| 587 |
$result = $this->createSequence($seq_name); |
| 588 |
if (DB::isError($result)) { |
| 589 |
return $this->raiseError($result); |
| 590 |
} |
| 591 |
} else { |
| 592 |
$repeat = 0; |
| 593 |
} |
| 594 |
} while ($repeat); |
| 595 |
if (DB::isError($result)) { |
| 596 |
return $this->raiseError($result); |
| 597 |
} |
| 598 |
$arr = $result->fetchRow(DB_FETCHMODE_ORDERED); |
| 599 |
return $arr[0]; |
| 600 |
} |
| 601 |
|
| 602 |
// }}} |
| 603 |
// {{{ createSequence() |
| 604 |
|
| 605 |
function createSequence($seq_name) |
| 606 |
{ |
| 607 |
$seqname = $this->getSequenceName($seq_name); |
| 608 |
return $this->query("CREATE SEQUENCE ${seqname}"); |
| 609 |
} |
| 610 |
|
| 611 |
// }}} |
| 612 |
// {{{ dropSequence() |
| 613 |
|
| 614 |
function dropSequence($seq_name) |
| 615 |
{ |
| 616 |
$seqname = $this->getSequenceName($seq_name); |
| 617 |
return $this->query("DROP SEQUENCE ${seqname}"); |
| 618 |
} |
| 619 |
|
| 620 |
// }}} |
| 621 |
// {{{ oci8RaiseError() |
| 622 |
|
| 623 |
function oci8RaiseError($errno = null) |
| 624 |
{ |
| 625 |
if ($errno === null) { |
| 626 |
$error = @OCIError($this->connection); |
| 627 |
return $this->raiseError($this->errorCode($error['code']), |
| 628 |
null, null, null, $error['message']); |
| 629 |
} elseif (is_resource($errno)) { |
| 630 |
$error = @OCIError($errno); |
| 631 |
return $this->raiseError($this->errorCode($error['code']), |
| 632 |
null, null, null, $error['message']); |
| 633 |
} |
| 634 |
return $this->raiseError($this->errorCode($errno)); |
| 635 |
} |
| 636 |
|
| 637 |
// }}} |
| 638 |
// {{{ getSpecialQuery() |
| 639 |
|
| 640 |
/** |
| 641 |
* Returns the query needed to get some backend info |
| 642 |
* @param string $type What kind of info you want to retrieve |
| 643 |
* @return string The SQL query string |
| 644 |
*/ |
| 645 |
function getSpecialQuery($type) |
| 646 |
{ |
| 647 |
switch ($type) { |
| 648 |
case 'tables': |
| 649 |
$sql = "SELECT table_name FROM user_tables"; |
| 650 |
break; |
| 651 |
default: |
| 652 |
return null; |
| 653 |
} |
| 654 |
return $sql; |
| 655 |
} |
| 656 |
|
| 657 |
// }}} |
| 658 |
|
| 659 |
} |
| 660 |
// Local variables: |
| 661 |
// tab-width: 4 |
| 662 |
// c-basic-offset: 4 |
| 663 |
// End: |
| 664 |
?> |
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