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https://gitlab.com/harald.mueller/aktuelle.kurse.git
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618 lines
17 KiB
PHP
618 lines
17 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: Frank M. Kromann <frank@frontbase.com> |
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// +----------------------------------------------------------------------+
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//
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// $Id: fbsql.php,v 1.14 2002/02/28 08:27:08 sebastian Exp $
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//
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// Database independent query interface definition for PHP's FrontBase
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// extension.
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//
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//
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// XXX legend:
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//
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// XXX ERRORMSG: The error message from the fbsql 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_fbsql 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 $prepare_tokens = array();
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var $prepare_types = array();
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var $num_rows = array();
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var $fetchmode = DB_FETCHMODE_ORDERED; /* Default fetch mode */
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// }}}
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// {{{ constructor
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/**
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* DB_fbsql constructor.
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*
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* @access public
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*/
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function DB_fbsql()
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{
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$this->DB_common();
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$this->phptype = 'fbsql';
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$this->dbsyntax = 'fbsql';
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$this->features = array(
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'prepare' => false,
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'pconnect' => true,
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'transactions' => true,
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'limit' => 'emulate'
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);
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$this->errorcode_map = array(
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1004 => DB_ERROR_CANNOT_CREATE,
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1005 => DB_ERROR_CANNOT_CREATE,
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1006 => DB_ERROR_CANNOT_CREATE,
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1007 => DB_ERROR_ALREADY_EXISTS,
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1008 => DB_ERROR_CANNOT_DROP,
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1046 => DB_ERROR_NODBSELECTED,
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1050 => DB_ERROR_ALREADY_EXISTS,
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1051 => DB_ERROR_NOSUCHTABLE,
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1054 => DB_ERROR_NOSUCHFIELD,
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1062 => DB_ERROR_ALREADY_EXISTS,
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1064 => DB_ERROR_SYNTAX,
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1100 => DB_ERROR_NOT_LOCKED,
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1136 => DB_ERROR_VALUE_COUNT_ON_ROW,
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1146 => DB_ERROR_NOSUCHTABLE,
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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 $persistent (optional) whether the connection should
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* be persistent
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* @access public
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* @return int DB_OK on success, a DB error on failure
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*/
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function connect($dsninfo, $persistent = false)
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{
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if (!DB::assertExtension('fbsql'))
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return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
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$this->dsn = $dsninfo;
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$dbhost = $dsninfo['hostspec'] ? $dsninfo['hostspec'] : 'localhost';
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$user = $dsninfo['username'];
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$pw = $dsninfo['password'];
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$connect_function = $persistent ? 'fbsql_pconnect' : 'fbsql_connect';
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ini_set('track_errors', true);
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if ($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($dbhost);
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} else {
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$conn = false;
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}
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ini_restore("track_errors");
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if (empty($conn)) {
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if (empty($php_errormsg)) {
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return $this->raiseError(DB_ERROR_CONNECT_FAILED);
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} else {
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return $this->raiseError(DB_ERROR_CONNECT_FAILED, null, null,
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null, $php_errormsg);
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}
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}
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if ($dsninfo['database']) {
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if (!fbsql_select_db($dsninfo['database'], $conn)) {
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return $this->fbsqlRaiseError();
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}
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}
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$this->connection = $conn;
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return DB_OK;
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}
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// }}}
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// {{{ disconnect()
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/**
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* Log out and disconnect from the database.
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*
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* @access public
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*
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* @return bool TRUE on success, FALSE if not connected.
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*/
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function disconnect()
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{
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$ret = fbsql_close($this->connection);
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$this->connection = null;
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return $ret;
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}
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// }}}
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// {{{ simpleQuery()
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/**
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* Send a query to fbsql and return the results as a fbsql resource
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* identifier.
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*
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* @param the SQL query
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*
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* @access public
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*
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* @return mixed returns a valid fbsql result for successful SELECT
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* queries, DB_OK for other successful queries. A DB error is
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* returned on failure.
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*/
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function simpleQuery($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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$result = @fbsql_query("$query;", $this->connection);
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if (!$result) {
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return $this->fbsqlRaiseError();
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}
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// Determine which queries that should return data, and which
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// should return an error code only.
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if (DB::isManip($query)) {
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return DB_OK;
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}
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$numrows = $this->numrows($result);
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if (is_object($numrows)) {
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return $numrows;
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}
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$this->num_rows[$result] = $numrows;
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return $result;
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}
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// }}}
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// {{{ nextResult()
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/**
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* Move the internal fbsql result pointer to the next available result
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*
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* @param a valid fbsql result resource
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*
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* @access public
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*
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* @return true if a result is available otherwise return false
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*/
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function nextResult($result)
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{
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return @fbsql_next_result($result);
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}
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// }}}
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// {{{ fetchRow()
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/**
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* Fetch and return a row of data (it uses fetchInto for that)
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* @param $result fbsql result identifier
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* @param $fetchmode format of fetched row array
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* @param $rownum the absolute row number to fetch
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*
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* @return array a row of data, or false on error
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*/
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function fetchRow($result, $fetchmode = DB_FETCHMODE_DEFAULT, $rownum=null)
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{
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if ($fetchmode == DB_FETCHMODE_DEFAULT) {
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$fetchmode = $this->fetchmode;
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}
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$res = $this->fetchInto ($result, $arr, $fetchmode, $rownum);
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if ($res !== DB_OK) {
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return $res;
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}
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return $arr;
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}
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// }}}
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// {{{ 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 fbsql 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 $rownum the row number to fetch
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* @access public
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*
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* @return int DB_OK on success, a DB error on failure
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*/
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function fetchInto($result, &$arr, $fetchmode, $rownum=null)
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{
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if ($rownum !== null) {
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if (!@fbsql_data_seek($result, $rownum)) {
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return null;
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}
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}
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if ($fetchmode & DB_FETCHMODE_ASSOC) {
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$arr = @fbsql_fetch_array($result, FBSQL_ASSOC);
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} else {
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$arr = @fbsql_fetch_row($result);
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}
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if (!$arr) {
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$errno = @fbsql_errno($this->connection);
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if (!$errno) {
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return NULL;
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}
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return $this->fbsqlRaiseError($errno);
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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 fbsql result identifier or DB statement identifier
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*
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* @access public
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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($result)) {
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return fbsql_free_result($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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// {{{ autoCommit()
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function autoCommit($onoff=false)
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{
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if ($onoff) {
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$this->query("SET COMMIT TRUE");
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} else {
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$this->query("SET COMMIT FALSE");
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}
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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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fbsql_commit();
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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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fbsql_rollback();
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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 fbsql result identifier
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*
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* @access public
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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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$cols = @fbsql_num_fields($result);
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if (!$cols) {
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return $this->fbsqlRaiseError();
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}
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return $cols;
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}
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// }}}
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// {{{ numRows()
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/**
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* Get the number of rows in a result set.
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*
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* @param $result fbsql result identifier
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*
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* @access public
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*
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* @return int the number of rows in $result
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*/
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function numRows($result)
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{
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$rows = @fbsql_num_rows($result);
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if ($rows === null) {
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return $this->fbsqlRaiseError();
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}
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return $rows;
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}
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// }}}
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// {{{ affectedRows()
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/**
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* Gets the number of rows affected by the data manipulation
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* query. For other queries, this function returns 0.
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*
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* @return number of rows affected by the last query
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*/
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function affectedRows()
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{
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if (DB::isManip($this->last_query)) {
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$result = @fbsql_affected_rows($this->connection);
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} else {
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$result = 0;
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}
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return $result;
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}
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// }}}
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// {{{ errorNative()
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/**
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* Get the native error code of the last error (if any) that
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* occured on the current connection.
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*
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* @access public
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*
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* @return int native fbsql error code
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*/
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function errorNative()
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{
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return fbsql_errno($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 fbsql. 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, $ondemand = true)
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{
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$sqn = preg_replace('/[^a-z0-9_]/i', '_', $seq_name);
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$repeat = 0;
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do {
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$seqname = sprintf($this->getOption("seqname_format"), $sqn);
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$result = $this->query("INSERT INTO ${seqname} VALUES(NULL)");
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if ($ondemand && DB::isError($result) &&
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$result->getCode() == DB_ERROR_NOSUCHTABLE) {
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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 $result;
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}
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return fbsql_insert_id($this->connection);
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}
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// }}}
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||
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// {{{ createSequence()
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function createSequence($seq_name)
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{
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$sqn = preg_replace('/[^a-z0-9_]/i', '_', $seq_name);
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$seqname = sprintf($this->getOption("seqname_format"), $sqn);
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return $this->query("CREATE TABLE ${seqname} ".
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'(id INTEGER UNSIGNED AUTO_INCREMENT NOT NULL,'.
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' PRIMARY KEY(id))');
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}
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// }}}
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||
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// {{{ dropSequence()
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||
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function dropSequence($seq_name)
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{
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$sqn = preg_replace('/[^a-z0-9_]/i', '_', $seq_name);
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$seqname = sprintf($this->getOption("seqname_format"), $sqn);
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return $this->query("DROP TABLE ${seqname} RESTRICT");
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}
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||
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// }}}
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||
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// {{{ modifyQuery()
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||
|
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||
|
function modifyQuery($query)
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||
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{
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||
|
if ($this->options['optimize'] == 'portability') {
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||
|
// "DELETE FROM table" gives 0 affected rows in fbsql.
|
||
|
// This little hack lets you know how many rows were deleted.
|
||
|
if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {
|
||
|
$query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/',
|
||
|
'DELETE FROM \1 WHERE 1=1', $query);
|
||
|
}
|
||
|
}
|
||
|
return $query;
|
||
|
}
|
||
|
|
||
|
// }}}
|
||
|
// {{{ fbsqlRaiseError()
|
||
|
|
||
|
function fbsqlRaiseError($errno = null)
|
||
|
{
|
||
|
if ($errno === null) {
|
||
|
$errno = $this->errorCode(fbsql_errno($this->connection));
|
||
|
}
|
||
|
return $this->raiseError($errno, null, null, null,
|
||
|
fbsql_error($this->connection));
|
||
|
}
|
||
|
|
||
|
// }}}
|
||
|
// {{{ tableInfo()
|
||
|
|
||
|
function tableInfo($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)) {
|
||
|
$id = @fbsql_list_fields($this->dsn['database'],
|
||
|
$result, $this->connection);
|
||
|
if (empty($id)) {
|
||
|
return $this->fbsqlRaiseError();
|
||
|
}
|
||
|
} else { // else we want information about a resultset
|
||
|
$id = $result;
|
||
|
if (empty($id)) {
|
||
|
return $this->fbsqlRaiseError();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
$count = @fbsql_num_fields($id);
|
||
|
|
||
|
// made this IF due to performance (one if is faster than $count if's)
|
||
|
if (empty($mode)) {
|
||
|
for ($i=0; $i<$count; $i++) {
|
||
|
$res[$i]['table'] = @fbsql_field_table ($id, $i);
|
||
|
$res[$i]['name'] = @fbsql_field_name ($id, $i);
|
||
|
$res[$i]['type'] = @fbsql_field_type ($id, $i);
|
||
|
$res[$i]['len'] = @fbsql_field_len ($id, $i);
|
||
|
$res[$i]['flags'] = @fbsql_field_flags ($id, $i);
|
||
|
}
|
||
|
} else { // full
|
||
|
$res["num_fields"]= $count;
|
||
|
|
||
|
for ($i=0; $i<$count; $i++) {
|
||
|
$res[$i]['table'] = @fbsql_field_table ($id, $i);
|
||
|
$res[$i]['name'] = @fbsql_field_name ($id, $i);
|
||
|
$res[$i]['type'] = @fbsql_field_type ($id, $i);
|
||
|
$res[$i]['len'] = @fbsql_field_len ($id, $i);
|
||
|
$res[$i]['flags'] = @fbsql_field_flags ($id, $i);
|
||
|
if ($mode & DB_TABLEINFO_ORDER) {
|
||
|
$res['order'][$res[$i]['name']] = $i;
|
||
|
}
|
||
|
if ($mode & DB_TABLEINFO_ORDERTABLE) {
|
||
|
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// free the result only if we were called on a table
|
||
|
if (is_string($result)) {
|
||
|
@fbsql_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':
|
||
|
$sql = 'select "table_name" from information_schema.tables';
|
||
|
break;
|
||
|
default:
|
||
|
return null;
|
||
|
}
|
||
|
return $sql;
|
||
|
}
|
||
|
|
||
|
// }}}
|
||
|
}
|
||
|
|
||
|
// TODO/wishlist:
|
||
|
// longReadlen
|
||
|
// binmode
|
||
|
|
||
|
?>
|