<?php
/* Copyright (C) 2002-2007 Rodolphe Quiedeville <rodolphe@quiedeville.org>
 * Copyright (C) 2004-2008 Laurent Destailleur  <eldy@users.sourceforge.net>
 * Copyright (C) 2005-2007 Regis Houssin        <regis@dolibarr.fr>
 * Copyright (C) 2007      Simon Desee          <simon@dedisoft.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

/**
 *	\file       	htdocs/core/db/mssql.class.php
 *	\brief			Fichier de la classe permettant de gerer une base mssql
 */


/**
 *	\class      DoliDBMssql
 *	\brief      Classe de gestion de la database de dolibarr
 *	\remarks	Works with PHP5 Only
 */
class DoliDBMssql
{
	//! Database handler
	var $db;
	//! Database type
	var $type='mssql';
	//! Database label
	var $label='MSSQL';
	//! Charset used to force charset when creating database
	var $forcecharset='latin1';
	//! Collate used to force collate when creating database
	var $forcecollate='latin1_swedish_ci';
	//! Version min database
	var $versionmin=array(2000);
	//! Resultset de la derniere requete
	var $results;
	//! 1 si connecte, 0 sinon
	var $connected;
	//! 1 si base selectionne, 0 sinon
	var $database_selected;
	//! Nom base selectionnee
	var $database_name;
	//! Nom user base
	var $database_user;
	//! 1 si une transaction est en cours, 0 sinon
	var $transaction_opened;
	//! Derniere requete executee
	var $lastquery;
	//! Derniere requete executee avec echec
	var $lastqueryerror;
	//! Message erreur mysql
	var $lasterror;
	//! Message erreur mysql
	var $lasterrno;

	var $ok;
	var $error;


    /**
	 *	Constructor.
	 *	This create an opened connexion to a database server and eventually to a database
	 *
	 *	@param      string	$type		Type of database (mysql, pgsql...)
	 *	@param	    string	$host		Address of database server
	 *	@param	    string	$user		Nom de l'utilisateur autorise
	 *	@param	    string	$pass		Mot de passe
	 *	@param	    string	$name		Nom de la database
	 *	@param	    int		$port		Port of database server
	 *	@return	    int					1 if OK, 0 if not
     */
	function DoliDBMssql($type, $host, $user, $pass, $name='', $port=0)
	{
		global $conf,$langs;

		$this->database_user=$user;
		$this->transaction_opened=0;

		if (! function_exists("mssql_connect"))
		{
			$this->connected = 0;
			$this->ok = 0;
			$this->error="Mssql PHP functions for using MSSql driver are not available in this version of PHP";
			dol_syslog("DoliDB::DoliDB : MSsql PHP functions for using MSsql driver are not available in this version of PHP",LOG_ERR);
			return $this->ok;
		}

		if (! $host)
		{
			$this->connected = 0;
			$this->ok = 0;
			$this->error=$langs->trans("ErrorWrongHostParameter");
			dol_syslog("DoliDB::DoliDB : Erreur Connect, wrong host parameters",LOG_ERR);
			return $this->ok;
		}

		// Essai connexion serveur
		$this->db = $this->connect($host, $user, $pass, $name, $port);
		if ($this->db)
		{
			// Si client connecte avec charset different de celui de la base Dolibarr
			// (La base Dolibarr a ete forcee en this->forcecharset a l'install)
			$this->connected = 1;
			$this->ok = 1;
		}
		else
		{
			// host, login ou password incorrect
			$this->connected = 0;
			$this->ok = 0;
			$this->error=mssql_get_last_message();
			dol_syslog("DoliDB::DoliDB : Erreur Connect mssql_get_last_message=".$this->error,LOG_ERR);
		}

		// Si connexion serveur ok et si connexion base demandee, on essaie connexion base
		if ($this->connected && $name)
		{
			if ($this->select_db($name))
			{
				$this->database_selected = 1;
				$this->database_name = $name;
				$this->ok = 1;
			}
			else
			{
				$this->database_selected = 0;
				$this->database_name = '';
				$this->ok = 0;
				$this->error=$this->error();
				dol_syslog("DoliDB::DoliDB : Erreur Select_db ".$this->error,LOG_ERR);
			}
		}
		else
		{
			// Pas de selection de base demandee, ok ou ko
			$this->database_selected = 0;
		}

		return $this->ok;
	}

    /**
     *  Convert a SQL request in Mysql syntax to native syntax
     *
     *  @param     string	$line   SQL request line to convert
     *  @param     string	$type	Type of SQL order ('ddl' for insert, update, select, delete or 'dml' for create, alter...)
     *  @return    string   		SQL request line converted
     */
	function convertSQLFromMysql($line,$type='ddl')
	{
		return $line;
	}

	/**
	 *	Select a database
	 *
	 *	@param	    string	$database	Name of database
	 *	@return	    boolean  		    true if OK, false if KO
	 */
	function select_db($database)
	{
		return mssql_select_db($database, $this->db);
	}

	/**
	 *	Connexion to server
	 *
	 *	@param	    string	$host		database server host
	 *	@param	    string	$login		login
	 *	@param	    string	$passwd		password
	 *	@param		string	$name		name of database (not used for mysql, used for pgsql)
	 *	@param		string	$port		Port of database server
	 *	@return		resource			Database access handler
	 *	@see		close
	 */
	function connect($host, $login, $passwd, $name, $port=0)
	{
		dol_syslog("DoliDB::connect host=$host, port=$port, login=$login, passwd=--hidden--, name=$name");
		$newhost=$host;
		if ($port) $newhost.=':'.$port;
		$this->db  = @mssql_connect($newhost, $login, $passwd);
		//force les enregistrement en latin1 si la base est en utf8 par defaut
		// Supprime car plante sur mon PHP-Mysql. De plus, la base est forcement en latin1 avec
		// les nouvelles version de Dolibarr car force par l'install Dolibarr.
		//$this->query('SET NAMES '.$this->forcecharset);
		//print "Resultat fonction connect: ".$this->db;
		return $this->db;
	}

	/**
	 * Return label of manager
	 *
	 * @return			string      Label
	 */
	function getLabel()
	{
		return $this->label;
	}

	/**
	 *	Return version of database server
	 *
	 *	@return	        string      Version string
	 */
	function getVersion()
	{
		$resql=$this->query("SELECT @@VERSION");
		$version=$this->fetch_array($resql);
		return $version['computed'];
	}


	/**
	 *	Return version of database server into an array
	 *
	 *	@return	        array  		Version array
	 */
	function getVersionArray()
	{
		return explode('.',$this->getVersion());
	}


    /**
     *  Close database connexion
     *
     *  @return     boolean     True if disconnect successfull, false otherwise
     *  @see        connect
     */
    function close()
    {
        if ($this->db)
        {
          //dol_syslog("DoliDB::disconnect",LOG_DEBUG);
          $this->connected=0;
          return mssql_close($this->db);
        }
        return false;
    }


	/**
	 * Start transaction
	 *
	 * @return	    int         1 if transaction successfuly opened or already opened, 0 if error
	 */
	function begin()
	{
		if (! $this->transaction_opened)
		{
			$ret=$this->query("BEGIN TRANSACTION");
			if ($ret)
			{
				$this->transaction_opened++;
				dol_syslog("BEGIN Transaction",LOG_DEBUG);
			}
			return $ret;
		}
		else
		{
			$this->transaction_opened++;
			return 1;
		}
	}

	/**
     * Validate a database transaction
     *
     * @param       $log        Add more log to default log line
     * @return      int         1 if validation is OK or transaction level no started, 0 if ERROR
	 */
	function commit($log='')
	{
		if ($this->transaction_opened <= 1)
		{
			$ret=$this->query("COMMIT TRANSACTION");
			if ($ret)
			{
				$this->transaction_opened=0;
				dol_syslog("COMMIT Transaction",LOG_DEBUG);
			}
			return $ret;
		}
		else
		{
			$this->transaction_opened--;
			return 1;
		}
	}

	/**
	 * Annulation d'une transaction et retour aux anciennes valeurs
	 *
	 * @return	    int         1 si annulation ok ou transaction non ouverte, 0 en cas d'erreur
	 */
	function rollback()
	{
		if ($this->transaction_opened<=1)
		{
			$ret=$this->query("ROLLBACK TRANSACTION");
			$this->transaction_opened=0;
			dol_syslog("ROLLBACK Transaction",LOG_DEBUG);
			return $ret;
		}
		else
		{
			$this->transaction_opened--;
			return 1;
		}
	}

	/**
     *  Execute a SQL request and return the resultset
     *
     *  @param      query           SQL query string
     *  @param      usesavepoint    0=Default mode, 1=Run a savepoint before and a rollbock to savepoint if error (this allow to have some request with errors inside global transactions).
     *                              Note that with Mysql, this parameter is not used as Myssql can already commit a transaction even if one request is in error, without using savepoints.
     *  @param      type            Type of SQL order ('ddl' for insert, update, select, delete or 'dml' for create, alter...)
     *  @return     resource        Resultset of answer
	 */
	function query($query,$usesavepoint=0,$type='auto')
	{
		$query = trim($query);

		// Conversion syntaxe MySql vers MSDE.
		$query = str_ireplace("now()", "getdate()", $query);
		// Erreur SQL: cannot update timestamp field
		$query = str_ireplace(", tms = tms", "", $query);
		// Voir si l'on peut directement utiliser $query = str_ireplace("file", "[file]", $query);
		// au lieu des 3 lignes ci-dessous
		$query = str_ireplace(".file", ".[file]", $query);
		$query = str_ireplace(" file ", " [file] ", $query);
		$query = str_ireplace(" file,", " [file],", $query);
		// Idem file
		$query = str_ireplace(".percent", ".[percent]", $query);
		$query = str_ireplace(" percent ", " [percent] ", $query);
		$query = str_ireplace("percent,", "[percent],", $query);
		$query = str_ireplace("percent=", "[percent]=", $query);
		$query = str_ireplace("\'", "''", $query);


		$itemfound = stripos($query, " limit ");
		if ($itemfound !== false) {
			// Extraire le nombre limite
			$number = stristr($query, " limit ");
			$number = substr($number, 7);
			// Inserer l'instruction TOP et le nombre limite
			$query = str_ireplace("select ", "select top ".$number." ", $query);
			// Supprimer l'instruction MySql
			$query = str_ireplace(" limit ".$number, "", $query);
		}

		$itemfound = stripos($query, " week(");
		if ($itemfound !== false) {
			// Recreer une requete sans instruction Mysql
			$positionMySql = stripos($query, " week(");
			$newquery = substr($query, 0, $positionMySql);

			// Recuperer la date passee en parametre
			$extractvalue = stristr($query, " week(");
			$extractvalue = substr($extractvalue, 6);
			$positionMySql = stripos($extractvalue, ")");
			// Conserver la fin de la requete
			$endofquery = substr($extractvalue, $positionMySql);
			$extractvalue = substr($extractvalue, 0, $positionMySql);

			// Remplacer l'instruction MySql en Sql Server
			// Inserer la date en parametre et le reste de la requete
			$query = $newquery." DATEPART(week, ".$extractvalue.$endofquery;
		}

		//print "<!--".$query."-->";

		if (! $this->database_name)
		{
			// Ordre SQL ne necessitant pas de connexion a une base (exemple: CREATE DATABASE)
			$ret = mssql_query($query, $this->db);
		}
		else
		{
			$ret = mssql_query($query, $this->db);
		}

		if (! preg_match("/^COMMIT/i",$query) && ! preg_match("/^ROLLBACK/i",$query))
		{
			// Si requete utilisateur, on la sauvegarde ainsi que son resultset
			if (! $ret)
			{
				$result = mssql_query("SELECT @@ERROR as code", $this->db);
				$row = mssql_fetch_array($result);

                $this->lastqueryerror = $query;
				$this->lasterror = $this->error();
				$this->lasterrno = $row["code"];
                dol_syslog("Mssql.lib::query SQL error: ".$query, LOG_WARNING);
			}
			$this->lastquery=$query;
			$this->results = $ret;
		}

		return $ret;
	}

	/**
	 *	Renvoie la ligne courante (comme un objet) pour le curseur resultset
	 *
	 *	@param      resultset   Curseur de la requete voulue
	 *	@return	    object		Object result line or false if KO or end of cursor
	 */
	function fetch_object($resultset)
	{
		// Si le resultset n'est pas fourni, on prend le dernier utilise sur cette connexion
		if (! is_resource($resultset)) { $resultset=$this->results; }
		return mssql_fetch_object($resultset);
	}

	/**
	 * 	Renvoie les donnees dans un tableau
	 *
	 * 	@param      resultset           Curseur de la requete voulue
	 * 	@return	   array
	 */
	function fetch_array($resultset)
	{
		// Si le resultset n'est pas fourni, on prend le dernier utilise sur cette connexion
		if (! is_resource($resultset)) { $resultset=$this->results; }
		return mssql_fetch_array($resultset);
	}


	/**
	 * \brief      Renvoie les donnees comme un tableau.
	 * \param      resultset           Curseur de la requete voulue
	 * \return	   array
	 */
	function fetch_row($resultset)
	{
		// Si le resultset n'est pas fourni, on prend le dernier utilise sur cette connexion
		if (! is_resource($resultset)) { $resultset=$this->results; }
		return @mssql_fetch_row($resultset);
	}

	/**
	 * \brief      Renvoie le nombre de lignes dans le resultat d'une requete SELECT
	 * \see    	   affected_rows
	 * \param      resultset           Curseur de la requete voulue
	 * \return     int		           Nombre de lignes
	 */
	function num_rows($resultset)
	{
		// Si le resultset n'est pas fourni, on prend le dernier utilise sur cette connexion
		if (! is_resource($resultset)) { $resultset=$this->results; }
		return mssql_num_rows($resultset);
	}

	/**
	 \brief      Renvoie le nombre de lignes dans le resultat d'une requete INSERT, DELETE ou UPDATE
	 \see    	num_rows
	 \param      resultset   Curseur de la requete voulue
	 \return     int		    Nombre de lignes
	 */
	function affected_rows($resultset)
	{
		// Si le resultset n'est pas fourni, on prend le dernier utilise sur cette connexion
		if (! is_resource($resultset)) { $resultset=$this->results; }
		// mssql necessite un link de base pour cette fonction contrairement
		// a pqsql qui prend un resultset
		$rsRows = mssql_query("select @@rowcount as rows", $this->db);
		return mssql_result($rsRows, 0, "rows");
		//return mssql_affected_rows($this->db);
	}


	/**
	 * \brief      Libere le dernier resultset utilise sur cette connexion.
	 * \param      resultset   Curseur de la requete voulue
	 */
	function free($resultset=0)
	{
		// Si le resultset n'est pas fourni, on prend le dernier utilise sur cette connexion
		if (! is_resource($resultset)) { $resultset=$this->results; }
		// Si resultset en est un, on libere la memoire
		if (is_resource($resultset)) mssql_free_result($resultset);
	}


	/**
	 * \brief      Defini les limites de la requete.
	 * \param	    limit       nombre maximum de lignes retournees
	 * \param	    offset      numero de la ligne a partir de laquelle recuperer les ligne
	 * \return	    string      chaine exprimant la syntax sql de la limite
	 */
	function plimit($limit=0,$offset=0)
	{
		global $conf;
		if (! $limit) $limit=$conf->liste_limit;
		if ($offset > 0) return " LIMIT $offset,$limit ";
		else return " LIMIT $limit ";
	}


	/**
	 * Define sort criteria of request
	 * @param	    sortfield   List of sort fields
	 * @param	    sortorder   Sort order
	 * @return	    string      String to provide syntax of a sort sql string
	 * TODO			Mutualized this into a mother class
	 */
	function order($sortfield=0,$sortorder=0)
	{
		if ($sortfield)
		{
			$return='';
			$fields=explode(',',$sortfield);
			foreach($fields as $val)
			{
				if (! $return) $return.=' ORDER BY ';
				else $return.=',';

				$return.=preg_replace('/[^0-9a-z_\.]/i','',$val);
				if ($sortorder) $return.=' '.preg_replace('/[^0-9a-z]/i','',$sortorder);
			}
			return $return;
		}
		else
		{
			return '';
		}
	}


	/**
	 *     Escape a string to insert data.
	 *
	 *     @param	    stringtoencode		String to escape
	 *     @return	    string				String escaped
	 */
	function escape($stringtoencode)
	{
		return addslashes($stringtoencode);
	}


	/**
	 *   Convert (by PHP) a GM Timestamp date into a PHP server TZ to insert into a date field.
	 *   Function to use to build INSERT, UPDATE or WHERE predica
	 *
	 *   @param	    string	$param      Date TMS to convert
	 *   @return	string      		Date in a string YYYYMMDDHHMMSS
	 */
	function idate($param)
	{
		return dol_print_date($param,"%Y-%m-%d %H:%M:%S");
	}

	/**
	 *	Convert (by PHP) a PHP server TZ string date into a GM Timestamps date
	 * 	19700101020000 -> 3600 with TZ+1
	 *
	 * 	@param		string	$string		Date in a string (YYYYMMDDHHMMSS, YYYYMMDD, YYYY-MM-DD HH:MM:SS)
	 *	@return		date				Date TMS
	 */
	function jdate($string)
	{
		$string=preg_replace('/([^0-9])/i','',$string);
		$tmp=$string.'000000';
		$date=dol_mktime(substr($tmp,8,2),substr($tmp,10,2),substr($tmp,12,2),substr($tmp,4,2),substr($tmp,6,2),substr($tmp,0,4));
		return $date;
	}

	/**
     *  Formate a SQL IF
	 *	@param		test            chaine test
	 *	@param		resok           resultat si test egal
	 *	@param		resko           resultat si test non egal
	 *	@return		string          chaine formate SQL
	 */
	function ifsql($test,$resok,$resko)
	{
		return 'IF('.$test.','.$resok.','.$resko.')';
	}


	/**
	 *	\brief      Renvoie la derniere requete soumise par la methode query()
	 *	\return	    lastquery
	 */
	function lastquery()
	{
		return $this->lastquery;
	}

	/**
	 \brief      Renvoie la derniere requete en erreur
	 \return	    string	lastqueryerror
	 */
	function lastqueryerror()
	{
		return $this->lastqueryerror;
	}

	/**
	 \brief      Renvoie le libelle derniere erreur
	 \return	    string	lasterror
	 */
	function lasterror()
	{
		return $this->lasterror;
	}

	/**
	 \brief      Renvoie le code derniere erreur
	 \return	    string	lasterrno
	 */
	function lasterrno()
	{
		return $this->lasterrno;
	}

	/**
	 \brief     Renvoie le code erreur generique de l'operation precedente.
	 \return    error_num       (Exemples: DB_ERROR_TABLE_ALREADY_EXISTS, DB_ERROR_RECORD_ALREADY_EXISTS...)
	 */
	function errno()
	{
		if (! $this->connected) {
			// Si il y a eu echec de connexion, $this->db n'est pas valide.
			return 'DB_ERROR_FAILED_TO_CONNECT';
		}
		else {
			// Constants to convert a MSSql error code to a generic Dolibarr error code
			$errorcode_map = array(
			1004 => 'DB_ERROR_CANNOT_CREATE',
			1005 => 'DB_ERROR_CANNOT_CREATE',
			1006 => 'DB_ERROR_CANNOT_CREATE',
			1007 => 'DB_ERROR_ALREADY_EXISTS',
			1008 => 'DB_ERROR_CANNOT_DROP',
			1025 => 'DB_ERROR_NO_FOREIGN_KEY_TO_DROP',
			1046 => 'DB_ERROR_NODBSELECTED',
			1048 => 'DB_ERROR_CONSTRAINT',
			2714 => 'DB_ERROR_TABLE_ALREADY_EXISTS',
			1051 => 'DB_ERROR_NOSUCHTABLE',
			1054 => 'DB_ERROR_NOSUCHFIELD',
			1060 => 'DB_ERROR_COLUMN_ALREADY_EXISTS',
			1061 => 'DB_ERROR_KEY_NAME_ALREADY_EXISTS',
			2627 => 'DB_ERROR_RECORD_ALREADY_EXISTS',
			102  => 'DB_ERROR_SYNTAX',
			8120 => 'DB_ERROR_GROUP_BY_SYNTAX',
			1068 => 'DB_ERROR_PRIMARY_KEY_ALREADY_EXISTS',
			1075 => 'DB_ERROR_CANT_DROP_PRIMARY_KEY',
			1091 => 'DB_ERROR_NOSUCHFIELD',
			1100 => 'DB_ERROR_NOT_LOCKED',
			1136 => 'DB_ERROR_VALUE_COUNT_ON_ROW',
			1146 => 'DB_ERROR_NOSUCHTABLE',
			1216 => 'DB_ERROR_NO_PARENT',
			1217 => 'DB_ERROR_CHILD_EXISTS',
			1451 => 'DB_ERROR_CHILD_EXISTS'
			);

			if (isset($errorcode_map[$this->lasterrno]))
			{
				return $errorcode_map[$this->lasterrno];
			}
			$errno=$this->lasterrno;
			return ($errno?'DB_ERROR_'.$errno:'0');
		}
	}

	/**
	 \brief     Renvoie le texte de l'erreur mssql de l'operation precedente.
	 \return    error_text
	 */
	function error()
	{
		if (! $this->connected) {
			// Si il y a eu echec de connexion, $this->db n'est pas valide pour mssql_get_last_message.
			return 'Not connected. Check setup parameters in conf/conf.php file and your mssql client and server versions';
		}
		else {
			return mssql_get_last_message($this->db);
		}
	}

	/**
	 \brief     Recupere l'id genere par le dernier INSERT.
	 \param     tab     Nom de la table concernee par l'insert. Ne sert pas sous mssql mais requis pour compatibilite avec Postgresql
	 \return    int     id
	 */
	function last_insert_id($tab)
	{
		$res = $this->query("SELECT @@IDENTITY as id");
		if ($data = $this->fetch_array($res))
		{
			return $data["id"];
		}
		else
		{
			return -1;
		}
	}

	/**
     *  Encrypt sensitive data in database
     *  Warning: This function includes the escape, so it must use direct value
     *  @param          fieldorvalue    Field name or value to encrypt
     *  @param          withQuotes      Return string with quotes
     *  @return         return          XXX(field) or XXX('value') or field or 'value'
	 */
	function encrypt($fieldorvalue, $withQuotes=0)
	{
		global $conf;

		// Type of encryption (2: AES (recommended), 1: DES , 0: no encryption)
		$cryptType = ($conf->db->dolibarr_main_db_encryption?$conf->db->dolibarr_main_db_encryption:0);

		//Encryption key
		$cryptKey = (!empty($conf->db->dolibarr_main_db_cryptkey)?$conf->db->dolibarr_main_db_cryptkey:'');

		$return = $fieldorvalue;
		return ($withQuotes?"'":"").$this->escape($return).($withQuotes?"'":"");
	}

	/**
	 *	\brief          Decrypt sensitive data in database
	 *	\param	        value			Value to decrypt
	 * 	\return	        return			Decrypted value if used
	 */
	function decrypt($value)
	{
		global $conf;

		// Type of encryption (2: AES (recommended), 1: DES , 0: no encryption)
		$cryptType = ($conf->db->dolibarr_main_db_encryption?$conf->db->dolibarr_main_db_encryption:0);

		//Encryption key
		$cryptKey = (!empty($conf->db->dolibarr_main_db_cryptkey)?$conf->db->dolibarr_main_db_cryptkey:'');

		$return = $value;
		return $return;
	}


	// Next function are not required. Only minor features use them.
	//--------------------------------------------------------------

	/**
	 *	\brief          Renvoie l'id de la connexion
	 *	\return	        string      Id connexion
	 */
	function DDLGetConnectId()
	{
		$resql=$this->query('SELECT CONNECTION_ID()');
		$row=$this->fetch_row($resql);
		return $row[0];
	}

	/**
	 *	\brief          Create a new database
	 *	\param	        database		Database name to create
	 * 	\param			charset			Charset used to store data
	 * 	\param			collation		Charset used to sort data
	 * 	\return	        resource		resource defined if OK, null if KO
	 * 	\remarks        Ne pas utiliser les fonctions xxx_create_db (xxx=mssql, ...) car elles sont deprecated
	 *					On force creation de la base avec le charset forcecharset
	 */
	function DDLCreateDb($database,$charset='',$collation='')
	{
		// ALTER DATABASE dolibarr_db DEFAULT CHARACTER SET latin DEFAULT COLLATE latin1_swedish_ci
		$sql = 'CREATE DATABASE '.$database;
		$sql.= ' DEFAULT CHARACTER SET '.$this->forcecharset.' DEFAULT COLLATE '.$this->forcecollate;
		$ret=$this->query($sql);
		if (! $ret)
		{
			// On reessaie pour compatibilite avec mssql < 5.0
			$sql = 'CREATE DATABASE '.$database;
			$ret=$this->query($sql);
		}

		return $ret;
	}

	/**
	 *	\brief     	List tables into a database.
	 *	\param	    database		Name of database
	 *	\param	    table   		Filter on some tables
	 *	\return	    array			Array list of tables
	 */
	function DDLListTables($database,$table='')
	{
		$this->results = mssql_list_tables($database, $this->db);
		return $this->results;
	}

	/**
	 *	Create a table into database
	 *
	 *	@param	    string	$table 			Nom de la table
	 *	@param	    array	$fields 		Tableau associatif [nom champ][tableau des descriptions]
	 *	@param	    string	$primary_key 	Nom du champ qui sera la clef primaire
	 *	@param	    string	$type 			Type de la table
	 *	@param	    array	$unique_keys 	Tableau associatifs Nom de champs qui seront clef unique => valeur
	 *	@param	    array	$fulltext_keys	Tableau des Nom de champs qui seront indexes en fulltext
	 *	@param	    string	$keys 			Tableau des champs cles noms => valeur
	 *	@return	    int						<0 if KO, >=0 if OK
	 */
	function DDLCreateTable($table,$fields,$primary_key,$type,$unique_keys="",$fulltext_keys="",$keys="")
	{
		// cles recherchees dans le tableau des descriptions (fields) : type,value,attribute,null,default,extra
		// ex. : $fields['rowid'] = array('type'=>'int','value'=>'11','null'=>'not null','extra'=> 'auto_increment');
		$sql = "create table ".$table."(";
		$i=0;
		foreach($fields as $field_name => $field_desc)
		{
			$sqlfields[$i] = $field_name." ";
			$sqlfields[$i]  .= $field_desc['type'];
			if( preg_match("/^[^\s]/i",$field_desc['value']))
			$sqlfields[$i]  .= "(".$field_desc['value'].")";
			else if( preg_match("/^[^\s]/i",$field_desc['attribute']))
			$sqlfields[$i]  .= " ".$field_desc['attribute'];
			else if( preg_match("/^[^\s]/i",$field_desc['default']))
			{
				if(preg_match("/null/i",$field_desc['default']))
				$sqlfields[$i]  .= " default ".$field_desc['default'];
				else
				$sqlfields[$i]  .= " default '".$field_desc['default']."'";
			}
			else if( preg_match("/^[^\s]/i",$field_desc['null']))
			$sqlfields[$i]  .= " ".$field_desc['null'];

			else if( preg_match("/^[^\s]/i",$field_desc['extra']))
			$sqlfields[$i]  .= " ".$field_desc['extra'];
			$i++;
		}
		if($primary_key != "")
		$pk = "primary key(".$primary_key.")";

		if($unique_keys != "")
		{
			$i = 0;
			foreach($unique_keys as $key => $value)
			{
				$sqluq[$i] = "UNIQUE KEY '".$key."' ('".$value."')";
				$i++;
			}
		}
		if($keys != "")
		{
			$i = 0;
			foreach($keys as $key => $value)
			{
				$sqlk[$i] = "KEY ".$key." (".$value.")";
				$i++;
			}
		}
		$sql .= implode(',',$sqlfields);
		if($primary_key != "")
		$sql .= ",".$pk;
		if($unique_keys != "")
		$sql .= ",".implode(',',$sqluq);
		if($keys != "")
		$sql .= ",".implode(',',$sqlk);
		$sql .=") type=".$type;

		dol_syslog($sql);
		if(! $this -> query($sql))
		return -1;
		else
		return 1;
	}

	/**
	 \brief      decrit une table dans une database.
		\param	    table	Nom de la table
		\param	    field	Optionnel : Nom du champ si l'on veut la desc d'un champ
		\return	    resource
		*/
	function DDLDescTable($table,$field="")
	{
		$sql="DESC ".$table." ".$field;

		dol_syslog($sql);
		$this->results = $this->query($sql);
		return $this->results;
	}

	/**
	 *	\brief      Insert a new field in table
	 *	\param	    table 			Nom de la table
	 *	\param		field_name 		Nom du champ a inserer
	 *	\param	    field_desc 		Tableau associatif de description du champ a inserer[nom du parametre][valeur du parametre]
	 *	\param	    field_position 	Optionnel ex.: "after champtruc"
	 *	\return	    int				<0 si KO, >0 si OK
	 */
	function DDLAddField($table,$field_name,$field_desc,$field_position="")
	{
		// cles recherchees dans le tableau des descriptions (field_desc) : type,value,attribute,null,default,extra
		// ex. : $field_desc = array('type'=>'int','value'=>'11','null'=>'not null','extra'=> 'auto_increment');
		$sql= "ALTER TABLE ".$table." ADD ".$field_name." ";
		$sql .= $field_desc['type'];
		if( preg_match("/^[^\s]/i",$field_desc['value']))
		$sql  .= "(".$field_desc['value'].")";
		if( preg_match("/^[^\s]/i",$field_desc['attribute']))
		$sql  .= " ".$field_desc['attribute'];
		if( preg_match("/^[^\s]/i",$field_desc['null']))
		$sql  .= " ".$field_desc['null'];
		if( preg_match("/^[^\s]/i",$field_desc['default']))
		if(preg_match("/null/i",$field_desc['default']))
		$sql  .= " default ".$field_desc['default'];
		else
		$sql  .= " default '".$field_desc['default']."'";
		if( preg_match("/^[^\s]/i",$field_desc['extra']))
		$sql  .= " ".$field_desc['extra'];
		$sql .= " ".$field_position;

		if(! $this -> query($sql))
		return -1;
		else
		return 1;
	}

	/**
	 *	Update format of a field into a table
	 *	@param	    table 			Name of table
	 *	@param		field_name 		Name of field to modify
	 *	@param	    field_desc 		Array with description of field format
	 *	@return	    int				<0 if KO, >0 if OK
	 */
	function DDLUpdateField($table,$field_name,$field_desc)
	{
		$sql = "ALTER TABLE ".$table;
		$sql .= " MODIFY COLUMN ".$field_name." ".$field_desc['type'];
		if ($field_desc['type'] == 'int' || $field_desc['type'] == 'varchar') $sql.="(".$field_desc['value'].")";

		dol_syslog($sql,LOG_DEBUG);
		if (! $this->query($sql))
		return -1;
		else
		return 1;
	}

	/**
	 *	\brief      Drop a field in table
	 *	\param	    table 			Nom de la table
	 *	\param		field_name 		Nom du champ a inserer
	 *	\return	    int				<0 si KO, >0 si OK
	 */
	function DDLDropField($table,$field_name)
	{
		$sql= "ALTER TABLE ".$table." DROP COLUMN `".$field_name."`";
		dol_syslog($sql,LOG_DEBUG);
		if (! $this->query($sql))
		{
			$this->error=$this->lasterror();
			return -1;
		}
		else return 1;
	}


	function getDefaultCharacterSetDatabase(){
		/*
		 $resql=$this->query('SHOW VARIABLES LIKE \'character_set_database\'');
		 if (!$resql)
		 {
		 return $this->forcecharset;
		 }
		 $liste=$this->fetch_array($resql);
		 return $liste['Value'];
		 */
		return '';
	}

	function getListOfCharacterSet(){
		/*
		 $resql=$this->query('SHOW CHARSET');
		 $liste = array();
		 if ($resql)
		 {
			$i = 0;
			while ($obj = $this->fetch_object($resql) )
			{
			$liste[$i]['charset'] = $obj->Charset;
			$liste[$i]['description'] = $obj->Description;
			$i++;
			}
			$this->free($resql);
	  } else {
	  return null;
	  }
	  return $liste;
	  */
		return ''; // attente debuggage
	}

	function getDefaultCollationDatabase()
	{
		$resql=$this->query("SELECT SERVERPROPERTY('collation')");
		if (!$resql)
		{
			return $this->forcecollate;
		}
		$liste=$this->fetch_array($resql);
		return $liste['computed'];
	}

	function getListOfCollation()
	{
		/*
		 $resql=$this->query('SHOW COLLATION');
		 $liste = array();
		 if ($resql)
			{
			$i = 0;
			while ($obj = $this->fetch_object($resql) )
			{
			$liste[$i]['collation'] = $obj->Collation;
			$i++;
			}
			$this->free($resql);
			} else {
			return null;
			}
			return $liste;
			*/
		return ''; // attente debugage
	}

	/*
	 *  Return full path of dump program
	 *	@return		string		Full path of dump program
	 */
	function getPathOfDump()
	{

	    return '';
	}

    /**
     *	Return full path of restore program
     *	@return		string		Full path of restore program
     */
	function getPathOfRestore()
	{

	    return '';
	}
}

?>