mirror of
https://gitlab.com/harald.mueller/aktuelle.kurse.git
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664 lines
19 KiB
PHP
664 lines
19 KiB
PHP
<?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
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// call-interface extension.
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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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require_once 'DB/common.php';
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class DB_oci8 extends DB_common
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{
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// {{{ properties
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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 $last_stmt = false;
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// }}}
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// {{{ constructor
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function DB_oci8()
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{
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$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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// {{{ connect()
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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 = $dsninfo['hostspec'];
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$connect_function = $persistent ? 'OCIPLogon' : 'OCILogon';
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if ($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 = $conn;
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return DB_OK;
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}
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// }}}
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// {{{ disconnect()
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/**
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* Log out and disconnect from the database.
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*
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* @return bool TRUE on success, FALSE if not connected.
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*/
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function disconnect()
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{
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$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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// {{{ simpleQuery()
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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 : $result;
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}
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// }}}
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// {{{ nextResult()
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/**
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* Move the internal oracle result pointer to the next available result
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*
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* @param a valid oci8 result resource
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*
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* @access public
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*
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* @return true if a result is available otherwise return false
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*/
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function nextResult($result)
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{
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return false;
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}
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// }}}
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// {{{ fetchRow()
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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 = $this->fetchmode;
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}
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if ($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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// {{{ fetchInto()
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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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// {{{ freeResult()
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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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// {{{ numRows()
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function numRows($result)
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{
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// emulate numRows for Oracle. yuck.
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if ($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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// {{{ numCols()
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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 $cols;
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}
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// }}}
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// {{{ errorNative()
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/**
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* Get the native error code of the last error (if any) that occured
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* on the current connection. This does not work, as OCIError does
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* not work unless given a statement. If OCIError does return
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* something, so will this.
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*
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* @return int native oci8 error code
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*/
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function errorNative()
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{
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if (is_resource($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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}
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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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// {{{ prepare()
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/**
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* Prepares a query for multiple execution with execute(). With
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* oci8, this is emulated.
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* @param $query query to be prepared
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*
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* @return DB statement resource
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*/
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function prepare($query)
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{
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$tokens = split('[\&\?]', $query);
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$token = 0;
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$types = array();
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for ($i = 0; $i < strlen($query); $i++) {
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switch ($query[$i]) {
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case '?':
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$types[$token++] = DB_PARAM_SCALAR;
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break;
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case '&':
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$types[$token++] = DB_PARAM_OPAQUE;
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break;
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}
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}
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$binds = sizeof($tokens) - 1;
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$newquery = '';
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for ($i = 0; $i < $binds; $i++) {
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$newquery .= $tokens[$i] . ":bind" . $i;
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}
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$newquery .= $tokens[$i];
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$this->last_query = $query;
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$newquery = $this->modifyQuery($newquery);
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$stmt = @OCIParse($this->connection, $newquery);
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$this->prepare_types[$stmt] = $types;
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$this->manip_query[(int)$stmt] = DB::isManip($query);
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return $stmt;
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}
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// }}}
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// {{{ execute()
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/**
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* Executes a DB statement prepared with prepare().
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*
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* @param $stmt a DB statement resource (returned from prepare())
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* @param $data data to be used in execution of the statement
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*
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* @return int returns an oci8 result resource for successful
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* SELECT queries, DB_OK for other successful queries. A DB error
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* code is returned on failure.
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*/
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function execute($stmt, $data = false)
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{
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$types=&$this->prepare_types[$stmt];
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if (($size = sizeof($types)) != sizeof($data)) {
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return $this->raiseError(DB_ERROR_MISMATCH);
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}
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for ($i = 0; $i < $size; $i++) {
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if (is_array($data)) {
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$pdata[$i] = &$data[$i];
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}
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else {
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$pdata[$i] = &$data;
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}
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if ($types[$i] == DB_PARAM_OPAQUE) {
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$fp = fopen($pdata[$i], "r");
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$pdata[$i] = '';
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if ($fp) {
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while (($buf = fread($fp, 4096)) != false) {
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$pdata[$i] .= $buf;
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}
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}
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}
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if (!@OCIBindByName($stmt, ":bind" . $i, $pdata[$i], -1)) {
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return $this->oci8RaiseError($stmt);
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}
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}
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if ($this->autoCommit) {
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$success = @OCIExecute($stmt, OCI_COMMIT_ON_SUCCESS);
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}
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else {
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$success = @OCIExecute($stmt, OCI_DEFAULT);
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}
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if (!$success) {
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return $this->oci8RaiseError($stmt);
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}
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$this->last_stmt = $stmt;
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if ($this->manip_query[(int)$stmt]) {
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return DB_OK;
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} else {
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return new DB_result($this, $stmt);
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}
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}
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// }}}
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// {{{ autoCommit()
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/**
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* Enable/disable automatic commits
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*
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* @param $onoff true/false whether to autocommit
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*/
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function autoCommit($onoff = false)
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{
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$this->autoCommit = (bool)$onoff;;
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return DB_OK;
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}
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// }}}
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// {{{ commit()
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/**
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* Commit transactions on the current connection
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*
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* @return DB_ERROR or DB_OK
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*/
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function commit()
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{
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$result = @OCICommit($this->connection);
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if (!$result) {
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return $this->oci8RaiseError();
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}
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return DB_OK;
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}
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// }}}
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// {{{ rollback()
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/**
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* Roll back all uncommitted transactions on the current connection.
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*
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* @return DB_ERROR or DB_OK
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*/
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function rollback()
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{
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$result = @OCIRollback($this->connection);
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if (!$result) {
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return $this->oci8RaiseError();
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}
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return DB_OK;
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}
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|
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// }}}
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// {{{ affectedRows()
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/**
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|
* Gets the number of rows affected by the last query.
|
|
* if the last query was a select, returns 0.
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|
*
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|
* @return number of rows affected by the last query or DB_ERROR
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*/
|
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function affectedRows()
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{
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if ($this->last_stmt === false) {
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return $this->oci8RaiseError();
|
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}
|
|
$result = @OCIRowCount($this->last_stmt);
|
|
if ($result === false) {
|
|
return $this->oci8RaiseError($this->last_stmt);
|
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}
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return $result;
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}
|
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|
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// }}}
|
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// {{{ modifyQuery()
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|
|
|
function modifyQuery($query)
|
|
{
|
|
// "SELECT 2+2" must be "SELECT 2+2 FROM dual" in Oracle
|
|
if (preg_match('/^\s*SELECT/i', $query) &&
|
|
!preg_match('/\sFROM\s/i', $query)) {
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|
$query .= " FROM dual";
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|
}
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|
return $query;
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|
}
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|
|
// }}}
|
|
// {{{ modifyLimitQuery()
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|
|
|
/**
|
|
* Emulate the row limit support altering the query
|
|
*
|
|
* @param string $query The query to treat
|
|
* @param int $from The row to start to fetch from
|
|
* @param int $count The offset
|
|
* @return string The modified query
|
|
*
|
|
* @author Tomas V.V.Cox <cox@idecnet.com>
|
|
*/
|
|
function modifyLimitQuery($query, $from, $count)
|
|
{
|
|
// Let Oracle return the name of the columns instead of
|
|
// coding a "home" SQL parser
|
|
$q_fields = "SELECT * FROM ($query) WHERE NULL = NULL";
|
|
if (!$result = OCIParse($this->connection, $q_fields)) {
|
|
return $this->oci8RaiseError();
|
|
}
|
|
if (!OCIExecute($result, OCI_DEFAULT)) {
|
|
return $this->oci8RaiseError($result);
|
|
}
|
|
$ncols = OCINumCols($result);
|
|
$cols = array();
|
|
for ( $i = 1; $i <= $ncols; $i++ ) {
|
|
$cols[] = OCIColumnName($result, $i);
|
|
}
|
|
$fields = implode(', ', $cols);
|
|
// XXX Test that (tip by John Lim)
|
|
//if(preg_match('/^\s*SELECT\s+/is', $query, $match)) {
|
|
// // Introduce the FIRST_ROWS Oracle query optimizer
|
|
// $query = substr($query, strlen($match[0]), strlen($query));
|
|
// $query = "SELECT /* +FIRST_ROWS */ " . $query;
|
|
//}
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|
|
// Construct the query
|
|
// more at: http://marc.theaimsgroup.com/?l=php-db&m=99831958101212&w=2
|
|
// Perhaps this could be optimized with the use of Unions
|
|
$from += 1; // in Oracle rownum starts at 1
|
|
$query = "SELECT $fields FROM".
|
|
" (SELECT rownum as linenum, $fields FROM".
|
|
" ($query)".
|
|
" WHERE rownum <= ". ($from + $count) .
|
|
") WHERE linenum >= $from";
|
|
return $query;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ nextId()
|
|
|
|
/**
|
|
* Get the next value in a sequence. We emulate sequences
|
|
* for MySQL. Will create the sequence if it does not exist.
|
|
*
|
|
* @access public
|
|
*
|
|
* @param $seq_name the name of the sequence
|
|
*
|
|
* @param $ondemand whether to create the sequence table on demand
|
|
* (default is true)
|
|
*
|
|
* @return a sequence integer, or a DB error
|
|
*/
|
|
function nextId($seq_name, $ondemand = true)
|
|
{
|
|
$seqname = $this->getSequenceName($seq_name);
|
|
$repeat = 0;
|
|
do {
|
|
$this->expectError(DB_ERROR_NOSUCHTABLE);
|
|
$result = $this->query("SELECT ${seqname}.nextval FROM dual");
|
|
$this->popExpect();
|
|
if ($ondemand && DB::isError($result) &&
|
|
$result->getCode() == DB_ERROR_NOSUCHTABLE) {
|
|
$repeat = 1;
|
|
$result = $this->createSequence($seq_name);
|
|
if (DB::isError($result)) {
|
|
return $this->raiseError($result);
|
|
}
|
|
} else {
|
|
$repeat = 0;
|
|
}
|
|
} while ($repeat);
|
|
if (DB::isError($result)) {
|
|
return $this->raiseError($result);
|
|
}
|
|
$arr = $result->fetchRow(DB_FETCHMODE_ORDERED);
|
|
return $arr[0];
|
|
}
|
|
|
|
// }}}
|
|
// {{{ createSequence()
|
|
|
|
function createSequence($seq_name)
|
|
{
|
|
$seqname = $this->getSequenceName($seq_name);
|
|
return $this->query("CREATE SEQUENCE ${seqname}");
|
|
}
|
|
|
|
// }}}
|
|
// {{{ dropSequence()
|
|
|
|
function dropSequence($seq_name)
|
|
{
|
|
$seqname = $this->getSequenceName($seq_name);
|
|
return $this->query("DROP SEQUENCE ${seqname}");
|
|
}
|
|
|
|
// }}}
|
|
// {{{ oci8RaiseError()
|
|
|
|
function oci8RaiseError($errno = null)
|
|
{
|
|
if ($errno === null) {
|
|
$error = @OCIError($this->connection);
|
|
return $this->raiseError($this->errorCode($error['code']),
|
|
null, null, null, $error['message']);
|
|
} elseif (is_resource($errno)) {
|
|
$error = @OCIError($errno);
|
|
return $this->raiseError($this->errorCode($error['code']),
|
|
null, null, null, $error['message']);
|
|
}
|
|
return $this->raiseError($this->errorCode($errno));
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getSpecialQuery()
|
|
|
|
/**
|
|
* Returns the query needed to get some backend info
|
|
* @param string $type What kind of info you want to retrieve
|
|
* @return string The SQL query string
|
|
*/
|
|
function getSpecialQuery($type)
|
|
{
|
|
switch ($type) {
|
|
case 'tables':
|
|
$sql = "SELECT table_name FROM user_tables";
|
|
break;
|
|
default:
|
|
return null;
|
|
}
|
|
return $sql;
|
|
}
|
|
|
|
// }}}
|
|
|
|
}
|
|
// Local variables:
|
|
// tab-width: 4
|
|
// c-basic-offset: 4
|
|
// End:
|
|
?>
|