mirror of
https://gitlab.com/harald.mueller/aktuelle.kurse.git
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485 lines
13 KiB
PHP
485 lines
13 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: Stig Bakken <ssb@fast.no> |
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// +----------------------------------------------------------------------+
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//
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// $Id: odbc.php,v 1.54 2002/02/28 08:27:11 sebastian Exp $
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//
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// Database independent query interface definition for PHP's ODBC
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// extension.
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//
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//
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// XXX legend:
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// More info on ODBC errors could be found here:
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// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/trblsql/tr_err_odbc_5stz.asp
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//
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// XXX ERRORMSG: The error message from the odbc function should
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// be registered here.
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//
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require_once 'DB/common.php';
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class DB_odbc 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 $row = array();
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// }}}
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// {{{ constructor
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function DB_odbc()
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{
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$this->DB_common();
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$this->phptype = 'odbc';
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$this->dbsyntax = 'sql92';
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$this->features = array(
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'prepare' => true,
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'pconnect' => true,
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'transactions' => false,
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'limit' => 'emulate'
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);
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$this->errorcode_map = array(
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'01004' => DB_ERROR_TRUNCATED,
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'07001' => DB_ERROR_MISMATCH,
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'21S01' => DB_ERROR_MISMATCH,
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'21S02' => DB_ERROR_MISMATCH,
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'22003' => DB_ERROR_INVALID_NUMBER,
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'22008' => DB_ERROR_INVALID_DATE,
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'22012' => DB_ERROR_DIVZERO,
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'23000' => DB_ERROR_CONSTRAINT,
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'24000' => DB_ERROR_INVALID,
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'34000' => DB_ERROR_INVALID,
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'37000' => DB_ERROR_SYNTAX,
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'42000' => DB_ERROR_SYNTAX,
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'IM001' => DB_ERROR_UNSUPPORTED,
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'S0000' => DB_ERROR_NOSUCHTABLE,
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'S0001' => DB_ERROR_NOT_FOUND,
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'S0002' => DB_ERROR_NOT_FOUND,
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'S0011' => DB_ERROR_ALREADY_EXISTS,
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'S0012' => DB_ERROR_NOT_FOUND,
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'S0021' => DB_ERROR_ALREADY_EXISTS,
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'S0022' => DB_ERROR_NOT_FOUND,
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'S1009' => DB_ERROR_INVALID,
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'S1090' => DB_ERROR_INVALID,
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'S1C00' => DB_ERROR_NOT_CAPABLE
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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('odbc'))
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return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
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$this->dsn = $dsninfo;
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if (!empty($dsninfo['dbsyntax'])) {
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$this->dbsyntax = $dsninfo['dbsyntax'];
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}
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switch ($this->dbsyntax) {
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case 'solid':
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$this->features = array(
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'prepare' => true,
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'pconnect' => true,
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'transactions' => true
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);
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$default_dsn = 'localhost';
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break;
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case 'navision':
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// the Navision driver doesn't support fetch row by number
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$this->features['limit'] = false;
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break;
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default:
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break;
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}
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$dbhost = $dsninfo['hostspec'] ? $dsninfo['hostspec'] : 'localhost';
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$user = $dsninfo['username'];
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$pw = $dsninfo['password'];
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if ($this->provides('pconnect')) {
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$connect_function = $persistent ? 'odbc_pconnect' : 'odbc_connect';
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} else {
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$connect_function = 'odbc_connect';
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}
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$conn = @$connect_function($dbhost, $user, $pw);
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if (!is_resource($conn)) {
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return $this->raiseError(DB_ERROR_CONNECT_FAILED, null, null,
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null, $this->errorNative());
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}
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$this->connection = $conn;
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return DB_OK;
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}
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// }}}
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// {{{ disconnect()
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function disconnect()
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{
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$err = @odbc_close($this->connection);
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$this->connection = null;
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return $err;
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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 ODBC and return the results as a ODBC resource
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* identifier.
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*
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* @param $query the SQL query
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*
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* @return int returns a valid ODBC result for successful SELECT
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* queries, DB_OK for other successful queries. A DB error code
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* is returned on failure.
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*/
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function simpleQuery($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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$result = @odbc_exec($this->connection, $query);
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if (!$result) {
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return $this->odbcRaiseError(); // XXX ERRORMSG
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}
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// Determine which queries that should return data, and which
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// should return an error code only.
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if (DB::isManip($query)) {
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$this->manip_result = $result; // For affectedRows()
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return DB_OK;
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}
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$this->row[$result] = 0;
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$this->manip_result = 0;
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return $result;
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}
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// }}}
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// {{{ nextResult()
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/**
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* Move the internal odbc result pointer to the next available result
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*
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* @param a valid fbsql result resource
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*
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* @access public
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*
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* @return true if a result is available otherwise return false
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*/
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function nextResult($result)
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{
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return odbc_next_result($result);
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}
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// }}}
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// {{{ fetchRow()
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function fetchRow($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 $arr;
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}
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// }}}
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// {{{ fetchInto()
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function fetchInto($result, &$row, $fetchmode, $rownum=null)
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{
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$row = array();
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if ($rownum !== null) {
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$rownum++; // ODBC first row is 1
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if (!function_exists('version_compare') || version_compare(phpversion(), "4.0.5", "lt")) {
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$cols = odbc_fetch_into($result, $rownum, &$row);
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} else {
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$cols = odbc_fetch_into($result, $rownum, $row);
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}
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} else {
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if (!function_exists('version_compare') || version_compare(phpversion(), "4.0.5", "lt")) {
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$cols = odbc_fetch_into($result, &$row);
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} else {
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$cols = odbc_fetch_into($result, $row);
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}
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}
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if (!$cols) {
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/* XXX FIXME: doesn't work with unixODBC and easysoft
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(get corrupted $errno values)
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if ($errno = odbc_error($this->connection)) {
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return $this->RaiseError($errno);
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}*/
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return null;
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}
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if ($fetchmode !== DB_FETCHMODE_ORDERED) {
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for ($i = 0; $i < count($row); $i++) {
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$colName = odbc_field_name($result, $i+1);
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$a[$colName] = $row[$i];
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}
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$row = $a;
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}
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return DB_OK;
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}
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// }}}
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// {{{ freeResult()
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function freeResult($result)
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{
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if (is_resource($result)) {
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// Always return true
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return odbc_free_result($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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return true;
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}
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// }}}
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// {{{ numCols()
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function numCols($result)
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{
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$cols = @odbc_num_fields($result);
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if (!$cols) {
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return $this->odbcRaiseError();
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}
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return $cols;
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}
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// }}}
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// {{{ affectedRows()
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/**
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* Returns the number of rows affected by a manipulative query
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* (INSERT, DELETE, UPDATE)
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* @return mixed int affected rows, 0 when non manip queries or
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* DB error on error
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*/
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function affectedRows()
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{
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if (empty($this->manip_result)) { // In case of SELECT stms
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return 0;
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}
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$nrows = odbc_num_rows($this->manip_result);
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if ($nrows == -1) {
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return $this->odbcRaiseError();
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}
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return $nrows;
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}
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// }}}
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// {{{ numRows()
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/**
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* ODBC may or may not support counting rows in the result set of
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* SELECTs.
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*
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* @param $result the odbc result resource
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* @return the number of rows, or 0
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*/
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function numRows($result)
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{
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$nrows = odbc_num_rows($result);
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if ($nrows == -1) {
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return $this->odbcRaiseError(DB_ERROR_UNSUPPORTED);
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}
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return $nrows;
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}
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// }}}
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// {{{ errorNative()
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/**
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* Get the native error code of the last error (if any) that
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* occured on the current connection.
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*
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* @access public
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*
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* @return int ODBC error code
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*/
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function errorNative()
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{
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if (!isset($this->connection) || !is_resource($this->connection)) {
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return odbc_error() . ' ' . odbc_errormsg();
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}
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return odbc_error($this->connection) . ' ' . odbc_errormsg($this->connection);
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}
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// }}}
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// {{{ nextId()
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/**
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* Get the next value in a sequence. We emulate sequences
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* for odbc. Will create the sequence if it does not exist.
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*
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* @access public
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*
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* @param $seq_name the name of the sequence
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*
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* @param $ondemand whether to create the sequence table on demand
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* (default is true)
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*
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* @return a sequence integer, or a DB error
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*/
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function nextId($seq_name, $ondemand = true)
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{
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$seqname = $this->getSequenceName($seq_name);
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$repeat = 0;
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do {
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$result = $this->query("update ${seqname} set id = id + 1");
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if ($ondemand && DB::isError($result) &&
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$result->getCode() == DB_ERROR_NOT_FOUND) {
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$repeat = 1;
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$result = $this->createSequence($seq_name);
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if (DB::isError($result)) {
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return $result;
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}
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$result = $this->query("insert into ${seqname} (id) values(0)");
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} else {
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$repeat = 0;
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}
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} while ($repeat);
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if (DB::isError($result)) {
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return $result;
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}
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$result = $this->query("select id from ${seqname}");
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if (DB::isError($result)) {
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return $result;
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}
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$row = $result->fetchRow(DB_FETCHMODE_ASSOC);
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if (DB::isError($row || !$row)) {
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return $row;
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}
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return $row['id'];
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}
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// }}}
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// {{{ createSequence()
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function createSequence($seq_name)
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{
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$seqname = $this->getSequenceName($seq_name);
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return $this->query("CREATE TABLE ${seqname} ".
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'(id bigint NOT NULL,'.
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' PRIMARY KEY(id))');
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}
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// }}}
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// {{{ dropSequence()
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function dropSequence($seq_name)
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{
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$seqname = $this->getSequenceName($seq_name);
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return $this->query("DROP TABLE ${seqname}");
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}
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// }}}
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// {{{ autoCommit()
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function autoCommit($onoff = false)
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{
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if (!@odbc_autocommit($this->connection, $onoff)) {
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return $this->odbcRaiseError();
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}
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return DB_OK;
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}
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// }}}
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// {{{ commit()
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function commit()
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{
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if (!@odbc_commit($this->connection)) {
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return $this->odbcRaiseError();
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}
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return DB_OK;
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}
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// }}}
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// {{{ rollback()
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function rollback()
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{
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if (!@odbc_rollback($this->connection)) {
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return $this->odbcRaiseError();
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}
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return DB_OK;
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}
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// }}}
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// {{{ odbcRaiseError()
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function odbcRaiseError($errno = null)
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{
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if ($errno === null) {
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$errno = $this->errorCode(odbc_error($this->connection));
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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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// {{{ getSpecialQuery()
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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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// Local variables:
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// tab-width: 4
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// c-basic-offset: 4
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// End:
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?>
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