mirror of
https://gitlab.com/harald.mueller/aktuelle.kurse.git
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592 lines
19 KiB
PHP
592 lines
19 KiB
PHP
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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: Sterling Hughes <sterling@php.net> |
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// +----------------------------------------------------------------------+
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//
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// $Id: ibase.php,v 1.36.2.2 2002/04/09 19:04:13 ssb Exp $
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//
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// Database independent query interface definition for PHP's Interbase
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// extension.
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//
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require_once 'DB/common.php';
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class DB_ibase extends DB_common
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{
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var $connection;
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var $phptype, $dbsyntax;
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var $autocommit = 1;
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var $manip_query = array();
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function DB_ibase()
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{
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$this->DB_common();
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$this->phptype = 'ibase';
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$this->dbsyntax = 'ibase';
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$this->features = array(
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'prepare' => true,
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'pconnect' => true,
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'transactions' => true,
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'limit' => false
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);
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// just a few of the tons of Interbase error codes listed in the
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// Language Reference section of the Interbase manual
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$this->errorcode_map = array(
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-104 => DB_ERROR_SYNTAX,
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-150 => DB_ERROR_ACCESS_VIOLATION,
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-151 => DB_ERROR_ACCESS_VIOLATION,
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-155 => DB_ERROR_NOSUCHTABLE,
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-157 => DB_ERROR_NOSUCHFIELD,
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-158 => DB_ERROR_VALUE_COUNT_ON_ROW,
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-170 => DB_ERROR_MISMATCH,
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-171 => DB_ERROR_MISMATCH,
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-172 => DB_ERROR_INVALID,
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-204 => DB_ERROR_INVALID,
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-205 => DB_ERROR_NOSUCHFIELD,
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-206 => DB_ERROR_NOSUCHFIELD,
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-208 => DB_ERROR_INVALID,
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-219 => DB_ERROR_NOSUCHTABLE,
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-297 => DB_ERROR_CONSTRAINT,
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-530 => DB_ERROR_CONSTRAINT,
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-803 => DB_ERROR_CONSTRAINT,
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-551 => DB_ERROR_ACCESS_VIOLATION,
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-552 => DB_ERROR_ACCESS_VIOLATION,
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-922 => DB_ERROR_NOSUCHDB,
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-923 => DB_ERROR_CONNECT_FAILED,
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-924 => DB_ERROR_CONNECT_FAILED
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);
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}
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function connect($dsninfo, $persistent = false)
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{
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if (!DB::assertExtension('interbase')) {
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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 = $dsninfo['password'];
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$dbhost = $dsninfo['hostspec'] ?
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($dsninfo['hostspec'] . ':/' . $dsninfo['database']) :
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$dsninfo['database'];
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$connect_function = $persistent ? 'ibase_pconnect' : 'ibase_connect';
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$params = array();
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$params[] = $dbhost;
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$params[] = !empty($user) ? $user : null;
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$params[] = !empty($pw) ? $pw : null;
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$params[] = isset($dsninfo['charset']) ? $dsninfo['charset'] : null;
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$params[] = isset($dsninfo['buffers']) ? $dsninfo['buffers'] : null;
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$params[] = isset($dsninfo['dialect']) ? $dsninfo['dialect'] : null;
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$params[] = isset($dsninfo['role']) ? $dsninfo['role'] : null;
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/*
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if ($dbhost && $user && $pw) {
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$conn = $connect_function($dbhost, $user, $pw);
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} elseif ($dbhost && $user) {
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$conn = $connect_function($dbhost, $user);
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} elseif ($dbhost) {
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$conn = $connect_function($dbhost);
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} else {
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return $this->raiseError("no host, user or password");
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}
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*/
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$conn = @call_user_func_array($connect_function, $params);
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if (!$conn) {
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return $this->ibaseRaiseError(DB_ERROR_CONNECT_FAILED);
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}
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$this->connection = $conn;
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return DB_OK;
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}
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function disconnect()
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{
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$ret = @ibase_close($this->connection);
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$this->connection = null;
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return $ret;
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}
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function simpleQuery($query)
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{
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$ismanip = DB::isManip($query);
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$this->last_query = $query;
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$query = $this->modifyQuery($query);
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$result = @ibase_query($this->connection, $query);
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if (!$result) {
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return $this->ibaseRaiseError();
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}
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if ($this->autocommit && $ismanip) {
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ibase_commit($this->connection);
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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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return DB::isManip($query) ? DB_OK : $result;
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}
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// {{{ modifyLimitQuery()
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/**
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* This method is used by backends to alter limited queries
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* Uses the new FIRST n SKIP n Firebird 1.0 syntax, so it is
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* only compatible with Firebird 1.x
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*
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* @param string $query query to modify
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* @param integer $from the row to start to fetching
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* @param integer $count the numbers of rows to fetch
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*
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* @return the new (modified) query
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* @author Ludovico Magnocavallo <ludo@sumatrasolutions.com>
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* @access private
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*/
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function modifyLimitQuery($query, $from, $count)
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{
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if ($this->dsn['dbsyntax'] == 'firebird') {
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$from++; // SKIP starts from 1, ie SKIP 1 starts from the first record
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$query = preg_replace('/^\s*select\s(.*)$/is',
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"SELECT FIRST $count SKIP $from $1", $query);
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}
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return $query;
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}
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// }}}
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// {{{ nextResult()
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/**
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* Move the internal ibase result pointer to the next available result
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*
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* @param a valid fbsql result resource
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*
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* @access public
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*
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* @return true if a result is available otherwise return false
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*/
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function nextResult($result)
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{
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return false;
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}
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// }}}
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function fetchInto($result, &$ar, $fetchmode, $rownum = null)
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{
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if ($rownum !== NULL) {
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return $this->ibaseRaiseError(DB_ERROR_NOT_CAPABLE);
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}
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if ($fetchmode & DB_FETCHMODE_ASSOC) {
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$ar = get_object_vars(ibase_fetch_object($result));
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if ($ar && $this->options['optimize'] == 'portability') {
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$ar = array_change_key_case($ar, CASE_LOWER);
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}
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} else {
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$ar = ibase_fetch_row($result);
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}
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if (!$ar) {
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if ($errmsg = ibase_errmsg()) {
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return $this->ibaseRaiseError(null, $errmsg);
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} else {
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return null;
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}
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}
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return DB_OK;
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}
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function freeResult()
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{
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if (is_resource($result)) {
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return ibase_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)$result]);
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return true;
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}
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function freeQuery($query)
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{
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ibase_free_query($query);
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return true;
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}
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function numCols($result)
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{
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$cols = ibase_num_fields($result);
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if (!$cols) {
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return $this->ibaseRaiseError();
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}
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return $cols;
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}
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function prepare($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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$stmt = ibase_prepare($query);
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$this->manip_query[(int)$stmt] = DB::isManip($query);
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return $stmt;
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}
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function execute($stmt, $data = false)
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{
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$result = ibase_execute($stmt, $data);
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if (!$result) {
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return $this->ibaseRaiseError();
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}
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if ($this->autocommit) {
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ibase_commit($this->connection);
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}
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return DB::isManip($this->manip_query[(int)$stmt]) ? DB_OK : new DB_result($this, $result);
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}
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function autoCommit($onoff = false)
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{
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$this->autocommit = $onoff ? 1 : 0;
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return DB_OK;
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}
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function commit()
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{
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return ibase_commit($this->connection);
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}
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function rollback($trans_number)
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{
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return ibase_rollback($this->connection, $trans_number);
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}
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function transactionInit($trans_args = 0)
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{
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return $trans_args ? ibase_trans($trans_args, $this->connection) : ibase_trans();
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}
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// {{{ nextId()
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/**
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* Get the next value in a sequence.
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*
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* If the sequence does not exist, it will be created,
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* unless $ondemand is false.
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*
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* @access public
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* @param string $seq_name the name of the sequence
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* @param bool $ondemand whether to create the sequence on demand
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* @return a sequence integer, or a DB error
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*/
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function nextId($seq_name, $ondemand = true)
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{
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$sqn = strtoupper(preg_replace('/[^a-z0-9_]/i', '_', $seq_name));
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$repeat = 0;
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do {
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$this->pushErrorHandling(PEAR_ERROR_RETURN);
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$result = $this->query("SELECT GEN_ID(${sqn}_SEQ, 1) FROM RDB\$GENERATORS"
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." WHERE RDB\$GENERATOR_NAME='${sqn}_SEQ'");
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$this->popErrorHandling();
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if ($ondemand && DB::isError($result)) {
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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 $result;
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}
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} else {
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$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 $result;
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}
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$arr = $result->fetchRow(DB_FETCHMODE_ORDERED);
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$result->free();
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return $arr[0];
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}
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// }}}
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// {{{ createSequence()
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/**
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* Create the sequence
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*
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* @param string $seq_name the name of the sequence
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* @return mixed DB_OK on success or DB error on error
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* @access public
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*/
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function createSequence($seq_name)
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{
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$sqn = strtoupper(preg_replace('/[^a-z0-9_]/i', '_', $seq_name));
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$this->pushErrorHandling(PEAR_ERROR_RETURN);
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$result = $this->query("CREATE GENERATOR ${sqn}_SEQ");
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$this->popErrorHandling();
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return $result;
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}
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// }}}
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// {{{ dropSequence()
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/**
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* Drop a sequence
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*
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* @param string $seq_name the name of the sequence
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* @return mixed DB_OK on success or DB error on error
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* @access public
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*/
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function dropSequence($seq_name)
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{
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$sqn = strtoupper(preg_replace('/[^a-z0-9_]/i', '_', $seq_name));
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return $this->query("DELETE FROM RDB\$GENERATORS WHERE RDB\$GENERATOR_NAME='${sqn}_SEQ'");
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}
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// }}}
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// {{{ _ibaseFieldFlags()
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/**
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* get the Flags of a Field
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*
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* @param string $field_name the name of the field
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* @param string $table_name the name of the table
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*
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* @return string The flags of the field ("primary_key", "unique_key", "not_null"
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* "default", "computed" and "blob" are supported)
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* @access private
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*/
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function _ibaseFieldFlags($field_name, $table_name)
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||
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{
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||
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$sql = 'SELECT R.RDB$CONSTRAINT_TYPE CTYPE'
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||
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.' FROM RDB$INDEX_SEGMENTS I'
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.' JOIN RDB$RELATION_CONSTRAINTS R ON I.RDB$INDEX_NAME=R.RDB$INDEX_NAME'
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.' WHERE I.RDB$FIELD_NAME=\''.$field_name.'\''
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.' AND R.RDB$RELATION_NAME=\''.$table_name.'\'';
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||
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$result = ibase_query($this->connection, $sql);
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||
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if (empty($result)) {
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||
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return $this->ibaseRaiseError();
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}
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||
|
|
if ($obj = @ibase_fetch_object($result)) {
|
||
|
|
ibase_free_result($result);
|
||
|
|
if (isset($obj->CTYPE) && trim($obj->CTYPE) == 'PRIMARY KEY') {
|
||
|
|
$flags = 'primary_key ';
|
||
|
|
}
|
||
|
|
if (isset($obj->CTYPE) && trim($obj->CTYPE) == 'UNIQUE') {
|
||
|
|
$flags .= 'unique_key ';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$sql = 'SELECT R.RDB$NULL_FLAG AS NFLAG,'
|
||
|
|
.' R.RDB$DEFAULT_SOURCE AS DSOURCE,'
|
||
|
|
.' F.RDB$FIELD_TYPE AS FTYPE,'
|
||
|
|
.' F.RDB$COMPUTED_SOURCE AS CSOURCE'
|
||
|
|
.' FROM RDB$RELATION_FIELDS R '
|
||
|
|
.' JOIN RDB$FIELDS F ON R.RDB$FIELD_SOURCE=F.RDB$FIELD_NAME'
|
||
|
|
.' WHERE R.RDB$RELATION_NAME=\''.$table_name.'\''
|
||
|
|
.' AND R.RDB$FIELD_NAME=\''.$field_name.'\'';
|
||
|
|
$result = ibase_query($this->connection, $sql);
|
||
|
|
if (empty($result)) {
|
||
|
|
return $this->ibaseRaiseError();
|
||
|
|
}
|
||
|
|
if ($obj = @ibase_fetch_object($result)) {
|
||
|
|
ibase_free_result($result);
|
||
|
|
if (isset($obj->NFLAG)) {
|
||
|
|
$flags .= 'not_null ';
|
||
|
|
}
|
||
|
|
if (isset($obj->DSOURCE)) {
|
||
|
|
$flags .= 'default ';
|
||
|
|
}
|
||
|
|
if (isset($obj->CSOURCE)) {
|
||
|
|
$flags .= 'computed ';
|
||
|
|
}
|
||
|
|
if (isset($obj->FTYPE) && $obj->FTYPE == 261) {
|
||
|
|
$flags .= 'blob ';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return trim($flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
// }}}
|
||
|
|
// {{{ tableInfo()
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns information about a table or a result set
|
||
|
|
*
|
||
|
|
* NOTE: doesn't support 'flags'and 'table' if called from a db_result
|
||
|
|
*
|
||
|
|
* @param mixed $resource Interbase result identifier or table name
|
||
|
|
* @param int $mode A valid tableInfo mode (DB_TABLEINFO_ORDERTABLE or
|
||
|
|
* DB_TABLEINFO_ORDER)
|
||
|
|
*
|
||
|
|
* @return array An array with all the information
|
||
|
|
*/
|
||
|
|
function tableInfo($result, $mode = null)
|
||
|
|
{
|
||
|
|
$count = 0;
|
||
|
|
$id = 0;
|
||
|
|
$res = array();
|
||
|
|
|
||
|
|
/*
|
||
|
|
* depending on $mode, metadata returns the following values:
|
||
|
|
*
|
||
|
|
* - mode is false (default):
|
||
|
|
* $result[]:
|
||
|
|
* [0]["table"] table name
|
||
|
|
* [0]["name"] field name
|
||
|
|
* [0]["type"] field type
|
||
|
|
* [0]["len"] field length
|
||
|
|
* [0]["flags"] field flags
|
||
|
|
*
|
||
|
|
* - mode is DB_TABLEINFO_ORDER
|
||
|
|
* $result[]:
|
||
|
|
* ["num_fields"] number of metadata records
|
||
|
|
* [0]["table"] table name
|
||
|
|
* [0]["name"] field name
|
||
|
|
* [0]["type"] field type
|
||
|
|
* [0]["len"] field length
|
||
|
|
* [0]["flags"] field flags
|
||
|
|
* ["order"][field name] index of field named "field name"
|
||
|
|
* The last one is used, if you have a field name, but no index.
|
||
|
|
* Test: if (isset($result['meta']['myfield'])) { ...
|
||
|
|
*
|
||
|
|
* - mode is DB_TABLEINFO_ORDERTABLE
|
||
|
|
* the same as above. but additionally
|
||
|
|
* ["ordertable"][table name][field name] index of field
|
||
|
|
* named "field name"
|
||
|
|
*
|
||
|
|
* this is, because if you have fields from different
|
||
|
|
* tables with the same field name * they override each
|
||
|
|
* other with DB_TABLEINFO_ORDER
|
||
|
|
*
|
||
|
|
* you can combine DB_TABLEINFO_ORDER and
|
||
|
|
* DB_TABLEINFO_ORDERTABLE with DB_TABLEINFO_ORDER |
|
||
|
|
* DB_TABLEINFO_ORDERTABLE * or with DB_TABLEINFO_FULL
|
||
|
|
*/
|
||
|
|
|
||
|
|
// if $result is a string, then we want information about a
|
||
|
|
// table without a resultset
|
||
|
|
|
||
|
|
if (is_string($result)) {
|
||
|
|
$id = ibase_query($this->connection,"SELECT * FROM $result");
|
||
|
|
if (empty($id)) {
|
||
|
|
return $this->ibaseRaiseError();
|
||
|
|
}
|
||
|
|
} else { // else we want information about a resultset
|
||
|
|
$id = $result;
|
||
|
|
if (empty($id)) {
|
||
|
|
return $this->ibaseRaiseError();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$count = @ibase_num_fields($id);
|
||
|
|
|
||
|
|
// made this IF due to performance (one if is faster than $count if's)
|
||
|
|
if (empty($mode)) {
|
||
|
|
|
||
|
|
for ($i=0; $i<$count; $i++) {
|
||
|
|
$info = @ibase_field_info($id, $i);
|
||
|
|
$res[$i]['table'] = (is_string($result)) ? $result : '';
|
||
|
|
$res[$i]['name'] = $info['name'];
|
||
|
|
$res[$i]['type'] = $info['type'];
|
||
|
|
$res[$i]['len'] = $info['length'];
|
||
|
|
$res[$i]['flags'] = (is_string($result)) ? $this->_ibaseFieldFlags($info['name'], $result) : '';
|
||
|
|
}
|
||
|
|
|
||
|
|
} else { // full
|
||
|
|
$res["num_fields"]= $count;
|
||
|
|
|
||
|
|
for ($i=0; $i<$count; $i++) {
|
||
|
|
$info = @ibase_field_info($id, $i);
|
||
|
|
$res[$i]['table'] = (is_string($result)) ? $result : '';
|
||
|
|
$res[$i]['name'] = $info['name'];
|
||
|
|
$res[$i]['type'] = $info['type'];
|
||
|
|
$res[$i]['len'] = $info['length'];
|
||
|
|
$res[$i]['flags'] = (is_string($result)) ? $this->_ibaseFieldFlags($info['name'], $result) : '';
|
||
|
|
if ($mode & DB_TABLEINFO_ORDER) {
|
||
|
|
$res['order'][$res[$i]['name']] = $i;
|
||
|
|
}
|
||
|
|
if ($mode & DB_TABLEINFO_ORDERTABLE) {
|
||
|
|
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// free the result only if we were called on a table
|
||
|
|
if (is_resource($id)) {
|
||
|
|
ibase_free_result($id);
|
||
|
|
}
|
||
|
|
return $res;
|
||
|
|
}
|
||
|
|
|
||
|
|
// }}}
|
||
|
|
// {{{ 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':
|
||
|
|
default:
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
return $sql;
|
||
|
|
}
|
||
|
|
|
||
|
|
// }}}
|
||
|
|
// {{{ ibaseRaiseError()
|
||
|
|
|
||
|
|
function ibaseRaiseError($errno = null, $errmsg = null)
|
||
|
|
{
|
||
|
|
if ($errmsg === null)
|
||
|
|
$errmsg = ibase_errmsg();
|
||
|
|
// memo for the interbase php module hackers: we need something similar
|
||
|
|
// to mysql_errno() to retrieve error codes instead of this ugly hack
|
||
|
|
if (preg_match('/^([^0-9\-]+)([0-9\-]+)\s+(.*)$/', $errmsg, $m)) {
|
||
|
|
if ($errno === null) {
|
||
|
|
$ibase_errno = (int)$m[2];
|
||
|
|
// try to interpret Interbase error code (that's why we need ibase_errno()
|
||
|
|
// in the interbase module to return the real error code)
|
||
|
|
switch ($ibase_errno) {
|
||
|
|
case -204:
|
||
|
|
if (is_int(strpos($m[3], 'Table unknown'))) {
|
||
|
|
$errno = DB_ERROR_NOSUCHTABLE;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
$errno = $this->errorCode($ibase_errno);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$errmsg = $m[2] . ' ' . $m[3];
|
||
|
|
}
|
||
|
|
|
||
|
|
return $this->raiseError($errno, null, null, $errmsg,
|
||
|
|
$this->last_query);
|
||
|
|
}
|
||
|
|
|
||
|
|
// }}}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Local variables:
|
||
|
|
* tab-width: 4
|
||
|
|
* c-basic-offset: 4
|
||
|
|
* End:
|
||
|
|
*/
|
||
|
|
|
||
|
|
?>
|