<?php
/* Copyright (C) 2001      Fabien Seisen        <seisen@linuxfr.org>
 * Copyright (C) 2002-2005 Rodolphe Quiedeville <rodolphe@quiedeville.org>
 * Copyright (C) 2004-2010 Laurent Destailleur  <eldy@users.sourceforge.net>
 * Copyright (C) 2004      Sebastien Di Cintio  <sdicintio@ressource-toi.org>
 * Copyright (C) 2004      Benoit Mortier		<benoit.mortier@opensides.be>
 * Copyright (C) 2005-2009 Regis Houssin        <regis@dolibarr.fr>
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/**
 *	\file       htdocs/lib/databases/pgsql.lib.php
 *	\brief      Fichier de la classe permettant de gerer une base pgsql
 *	\version	$Id: pgsql.lib.php,v 1.109 2011/07/04 07:36:30 eldy Exp $
 */
// For compatibility during upgrade
if (! defined('DOL_DOCUMENT_ROOT'))	 define('DOL_DOCUMENT_ROOT', '../..');
if (! defined('ADODB_DATE_VERSION')) include_once(DOL_DOCUMENT_ROOT."/includes/adodbtime/adodb-time.inc.php");


/**
 *	\class      DoliDb
 *	\brief      Class to drive a Postgresql database for Dolibarr
 */
class DoliDb
{
	var $db;                      // Database handler
	var $type='pgsql';            // Name of manager
	var $label='PostgreSQL';      // Label of manager
	//! Charset
	var $forcecharset='latin1';
	var $versionmin=array(8,4,0);	// Version min database

	var $results;                 // Resultset de la derniere requete

	var $connected;               // 1 si connecte, 0 sinon
	var $database_selected;       // 1 si base selectionne, 0 sinon
	var $database_name;			//! Nom base selectionnee
	var $database_user;	   		//! Nom user base
	var $transaction_opened;      // 1 si une transaction est en cours, 0 sinon
	var $lastquery;
	var $lastqueryerror;		// Ajout d'une variable en cas d'erreur

	var $unescapeslashquot=0;              // By default we do not force the unescape of \'. This is used only to process sql with mysql escaped data.
	var $standard_conforming_strings=1;    // Database has option standard_conforming_strings to on

	var $ok;
	var $error;
	var $lasterror;


	/**
	 * \brief      Ouverture d'une connexion vers le serveur et une database.
	 * \param		type		type de base de donnees (mysql ou pgsql)
	 * \param		host		addresse de la base de donnees
	 * \param	    user		nom de l'utilisateur autorise
	 * \param		pass		mot de passe
	 * \param		name		nom de la database
	 * \param	    port		Port of database server
	 * \return		int			1 en cas de succes, 0 sinon
	 */
	function DoliDb($type='pgsql', $host, $user, $pass, $name='', $port=0)
	{
		global $conf,$langs;

		$this->forcecharset=$conf->file->character_set_client;
		$this->forcecollate=$conf->db->dolibarr_main_db_collation;
		$this->database_user=$user;

		$this->transaction_opened=0;

		//print "Name DB: $host,$user,$pass,$name<br>";

		if (! function_exists("pg_connect"))
		{
			$this->connected = 0;
			$this->ok = 0;
			$this->error="Pgsql PHP functions are not available in this version of PHP";
			dol_syslog("DoliDB::DoliDB : Pgsql PHP functions 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
		//print "$host, $user, $pass, $name, $port";
		$this->db = $this->connect($host, $user, $pass, $name, $port);
		if ($this->db)
		{
			$this->connected = 1;
			$this->ok = 1;
		}
		else
		{
			// host, login ou password incorrect
			$this->connected = 0;
			$this->ok = 0;
			$this->error='Host, login or password incorrect';
			dol_syslog("DoliDB::DoliDB : Erreur Connect ".$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 PostgreSQL syntax
	 * 	@param     line		SQL request line to convert
	 *  @param     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='auto')
	{
		# Removed empty line if this is a comment line for SVN tagging
		if (preg_match('/^--\s\$Id/i',$line)) {
			return '';
		}
		# Return line if this is a comment
		if (preg_match('/^#/i',$line) || preg_match('/^$/i',$line) || preg_match('/^--/i',$line))
		{
			return $line;
		}
		if ($line != "")
		{
		    if ($type == 'auto')
		    {
              if (preg_match('/ALTER TABLE/i',$line)) $type='dml';
              else if (preg_match('/CREATE TABLE/i',$line)) $type='dml';
              else if (preg_match('/DROP TABLE/i',$line)) $type='dml';
		    }

		    if ($type == 'dml')
		    {
                $line=preg_replace('/\s/',' ',$line);   // Replace tabulation with space

		        # we are inside create table statement so lets process datatypes
    			if (preg_match('/(ISAM|innodb)/i',$line)) { # end of create table sequence
    				$line=preg_replace('/\)[\s\t]*type[\s\t]*=[\s\t]*(MyISAM|innodb);/i',');',$line);
    				$line=preg_replace('/\)[\s\t]*engine[\s\t]*=[\s\t]*(MyISAM|innodb);/i',');',$line);
    				$line=preg_replace('/,$/','',$line);
    			}

    			// Process case: "CREATE TABLE llx_mytable(rowid integer NOT NULL AUTO_INCREMENT PRIMARY KEY,code..."
    			if (preg_match('/[\s\t\(]*(\w*)[\s\t]+int.*auto_increment/i',$line,$reg)) {
    				$newline=preg_replace('/([\s\t\(]*)([a-zA-Z_0-9]*)[\s\t]+int.*auto_increment[^,]*/i','\\1 \\2 SERIAL PRIMARY KEY',$line);
                    //$line = "-- ".$line." replaced by --\n".$newline;
                    $line=$newline;
    			}

    			# tinyint type conversion
    			$line=str_replace('tinyint','smallint',$line);

    			# nuke unsigned
    			$line=preg_replace('/(int\w+|smallint)\s+unsigned/i','\\1',$line);

    			# blob -> text
    			$line=preg_replace('/\w*blob/i','text',$line);

    			# tinytext/mediumtext -> text
    			$line=preg_replace('/tinytext/i','text',$line);
    			$line=preg_replace('/mediumtext/i','text',$line);

    			# change not null datetime field to null valid ones
    			# (to support remapping of "zero time" to null
    			$line=preg_replace('/datetime not null/i','datetime',$line);
    			$line=preg_replace('/datetime/i','timestamp',$line);

    			# double -> numeric
    			$line=preg_replace('/^double/i','numeric',$line);
    			$line=preg_replace('/(\s*)double/i','\\1numeric',$line);
    			# float -> numeric
    			$line=preg_replace('/^float/i','numeric',$line);
    			$line=preg_replace('/(\s*)float/i','\\1numeric',$line);

    			# unique index(field1,field2)
    			if (preg_match('/unique index\s*\((\w+\s*,\s*\w+)\)/i',$line))
    			{
    				$line=preg_replace('/unique index\s*\((\w+\s*,\s*\w+)\)/i','UNIQUE\(\\1\)',$line);
    			}

    			# We remove end of requests "AFTER fieldxxx"
    			$line=preg_replace('/AFTER [a-z0-9_]+/i','',$line);

    			# We remove start of requests "ALTER TABLE tablexxx" if this is a DROP INDEX
    			$line=preg_replace('/ALTER TABLE [a-z0-9_]+ DROP INDEX/i','DROP INDEX',$line);

                # Translate order to rename fields
                if (preg_match('/ALTER TABLE ([a-z0-9_]+) CHANGE(?: COLUMN)? ([a-z0-9_]+) ([a-z0-9_]+)(.*)$/i',$line,$reg))
                {
                	$line = "-- ".$line." replaced by --\n";
                    $line.= "ALTER TABLE ".$reg[1]." RENAME COLUMN ".$reg[2]." TO ".$reg[3];
                }

                # Translate order to modify field format
                if (preg_match('/ALTER TABLE ([a-z0-9_]+) MODIFY(?: COLUMN)? ([a-z0-9_]+) (.*)$/i',$line,$reg))
                {
                    $line = "-- ".$line." replaced by --\n";
                    $newreg3=$reg[3];
                    $newreg3=preg_replace('/ DEFAULT NULL/i','',$newreg3);
                    $newreg3=preg_replace('/ NOT NULL/i','',$newreg3);
                    $newreg3=preg_replace('/ NULL/i','',$newreg3);
                    $newreg3=preg_replace('/ DEFAULT 0/i','',$newreg3);
                    $newreg3=preg_replace('/ DEFAULT \'[0-9a-zA-Z_@]*\'/i','',$newreg3);
                    $line.= "ALTER TABLE ".$reg[1]." ALTER COLUMN ".$reg[2]." TYPE ".$newreg3;
                    // TODO Add alter to set default value or null/not null if there is this in $reg[3]
                }

                # alter table add primary key (field1, field2 ...) -> We remove the primary key name not accepted by PostGreSQL
    			# ALTER TABLE llx_dolibarr_modules ADD PRIMARY KEY pk_dolibarr_modules (numero, entity);
    			if (preg_match('/ALTER\s+TABLE\s*(.*)\s*ADD\s+PRIMARY\s+KEY\s*(.*)\s*\((.*)$/i',$line,$reg))
    			{
    				$line = "-- ".$line." replaced by --\n";
    				$line.= "ALTER TABLE ".$reg[1]." ADD PRIMARY KEY (".$reg[3];
    			}

                # Translate order to drop foreign keys
                # ALTER TABLE llx_dolibarr_modules DROP FOREIGN KEY fk_xxx;
                if (preg_match('/ALTER\s+TABLE\s*(.*)\s*DROP\s+FOREIGN\s+KEY\s*(.*)$/i',$line,$reg))
                {
                    $line = "-- ".$line." replaced by --\n";
                    $line.= "ALTER TABLE ".$reg[1]." DROP CONSTRAINT ".$reg[2];
                }

    			# alter table add [unique] [index] (field1, field2 ...)
    			# ALTER TABLE llx_accountingaccount ADD INDEX idx_accountingaccount_fk_pcg_version (fk_pcg_version)
    			if (preg_match('/ALTER\s+TABLE\s*(.*)\s*ADD\s+(UNIQUE INDEX|INDEX|UNIQUE)\s+(.*)\s*\(([\w,\s]+)\)/i',$line,$reg))
    			{
    				$fieldlist=$reg[4];
    				$idxname=$reg[3];
    				$tablename=$reg[1];
    				$line = "-- ".$line." replaced by --\n";
    				$line.= "CREATE ".(preg_match('/UNIQUE/',$reg[2])?'UNIQUE ':'')."INDEX ".$idxname." ON ".$tablename." (".$fieldlist.")";
    			}
            }

            // To have postgresql case sensitive
            $line=str_replace(' LIKE \'',' ILIKE \'',$line);

			// Delete using criteria on other table must not declare twice the deleted table
			// DELETE FROM tabletodelete USING tabletodelete, othertable -> DELETE FROM tabletodelete USING othertable
			if (preg_match('/DELETE FROM ([a-z_]+) USING ([a-z_]+), ([a-z_]+)/i',$line,$reg))
			{
				if ($reg[1] == $reg[2])	// If same table, we remove second one
				{
					$line=preg_replace('/DELETE FROM ([a-z_]+) USING ([a-z_]+), ([a-z_]+)/i','DELETE FROM \\1 USING \\3', $line);
				}
			}

			// Remove () in the tables in FROM if one table
			$line=preg_replace('/FROM\s*\((([a-z_]+)\s+as\s+([a-z_]+)\s*)\)/i','FROM \\1',$line);
			//print $line."\n";

			// Remove () in the tables in FROM if two table
			$line=preg_replace('/FROM\s*\(([a-z_]+\s+as\s+[a-z_]+)\s*,\s*([a-z_]+\s+as\s+[a-z_]+\s*)\)/i','FROM \\1, \\2',$line);
			//print $line."\n";

			// Remove () in the tables in FROM if two table
			$line=preg_replace('/FROM\s*\(([a-z_]+\s+as\s+[a-z_]+)\s*,\s*([a-z_]+\s+as\s+[a-z_]+\s*),\s*([a-z_]+\s+as\s+[a-z_]+\s*)\)/i','FROM \\1, \\2, \\3',$line);
			//print $line."\n";

			// Replace espacing \' by ''.
			// By default we do not (should be already done by db->escape function if required)
			if (! empty($this->unescapeslashquot))
			{
                // Except for sql insert in data file that
                // are mysql escaped so we removed them to be compatible with standard_conforming_strings=on
                // that considers \ as ordinary character).
                if ($this->standard_conforming_strings)
                {
				    $line=preg_replace("/\\\'/","''",$line);
                }
			}

			//print "type=".$type." newline=".$line."<br>\n";
		}

		return $line;
	}

	/**
	 * Select a database.
     * Ici postgresql n'a aucune fonction equivalente de mysql_select_db
     * On compare juste manuellement si la database choisie est bien celle activee par la connexion
	 * @param		database		nom de la database
	 * @return		boolean         true si ok, false si ko
	 */
	function select_db($database)
	{
		if ($database == $this->database_name) return true;
		else return false;
	}

	/**
	 * Connection vers le serveur
	 * @param		host		addresse de la base de donnees
	 * @param		login		nom de l'utilisateur autorise
	 * @param		passwd		mot de passe
	 * @param		name		nom de la database (ne sert pas sous mysql, sert sous pgsql)
	 * @param		port		Port of database server
	 * @return		resource	handler d'acces a la base
	 */
	function connect($host, $login, $passwd, $name, $port=0)
	{
		if (!$name){
			$name="postgres";
		}
		if (!$port){
			$port=5432;
		}
		$con_string = "host=$host port=$port dbname=$name user=$login password=$passwd";
        //print 'xxx'.$con_string;
        //$this->db = pg_pconnect($con_string);   // To us persistent connection because this one cost 1ms, non ersisten cost 30ms
        $this->db = pg_connect($con_string);
		if ($this->db)
		{
			$this->database_name = $name;
			pg_set_error_verbosity($this->db, PGSQL_ERRORS_VERBOSE);	// Set verbosity to max

		}
		return $this->db;
	}

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

	/**
	 * \brief          Return version of server
	 * \return	       string      String with version
	 */
	function getVersion()
	{
		$resql=$this->query('SHOW server_version');
		if ($resql)
		{
		  $liste=$this->fetch_array($resql);
		  return $liste['server_version'];
		}
		return '';
	}

	/**
	 * \brief		Renvoie la version du serveur sous forme de nombre
	 * \return		string      Chaine version
	 */
	function getIntVersion()
	{
		$version = $this->getVersion();
		$vlist = preg_split('/[.-]/',$version);
		if (dol_strlen($vlist[1])==1){
			$vlist[1]="0".$vlist[1];
		}
		if (dol_strlen($vlist[2])==1){
			$vlist[2]="0".$vlist[2];
		}
		return $vlist[0].$vlist[1].$vlist[2];
	}

	/**
	 * \brief		Renvoie la version du serveur dans un tableau
	 * \return		array  		Tableau de chaque niveau de version
	 */
	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);
          $this->connected=0;
          return pg_close($this->db);
        }
        return false;
    }

	/**
	 * \brief      Debut d'une transaction.
	 * \return	    int         1 si ouverture transaction ok ou deja ouverte, 0 en cas d'erreur
	 */
	function begin()
	{
		if (! $this->transaction_opened)
		{
			$ret=$this->query("BEGIN;");
			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;");
			if ($ret)
			{
				$this->transaction_opened=0;
				dol_syslog("COMMIT Transaction",LOG_DEBUG);
			}
			return $ret;
		}
		else
		{
			$this->transaction_opened--;
			return 1;
		}
	}

	/**
	 * \brief      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;");
			$this->transaction_opened=0;
			dol_syslog("ROLLBACK Transaction",LOG_DEBUG);
			return $ret;
		}
		else
		{
			$this->transaction_opened--;
			return 1;
		}
	}


	/**
	 * Convert request to PostgreSQL syntax, execute it and return the resultset.
	 * @param		query			SQL query string
	 * @param		usesavepoint	0=Default mode, 1=Run a savepoint before and a rollback to savepoint if error (this allow to have some request with errors inside global transactions).
     * @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);

		// Convert MySQL syntax to PostgresSQL syntax
		$query=$this->convertSQLFromMysql($query,$type);
		//print "FF\n".$query."<br>\n";

		// Fix bad formed requests. If request contains a date without quotes, we fix this but this should not occurs.
		$loop=true;
		while ($loop)
		{
			if (preg_match('/([^\'])([0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9] [0-9][0-9]:[0-9][0-9]:[0-9][0-9])/',$query))
			{
				$query=preg_replace('/([^\'])([0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9] [0-9][0-9]:[0-9][0-9]:[0-9][0-9])/','\\1\'\\2\'',$query);
				dol_syslog("Warning: Bad formed request converted into ".$query,LOG_WARNING);
			}
			else $loop=false;
		}

		if ($usesavepoint && $this->transaction_opened)
		{
			@pg_query($this->db, 'SAVEPOINT mysavepoint');
		}

		$ret = @pg_query($this->db, $query);
		//print $query;
		if (! preg_match("/^COMMIT/i",$query) && ! preg_match("/^ROLLBACK/i",$query)) // Si requete utilisateur, on la sauvegarde ainsi que son resultset
		{
			if (! $ret)
			{
				$this->lastqueryerror = $query;
				$this->lasterror = $this->error();
				$this->lasterrno = $this->errno();
				dol_syslog("Pgsql.lib::query SQL error: ".$query." ".$this->lasterrno, LOG_WARNING);
				//print "\n>> ".$query."<br>\n";
				//print '>> '.$this->lasterrno.' - '.$this->lasterror.' - '.$this->lastqueryerror."<br>\n";

				if ($usesavepoint && $this->transaction_opened)
				{
					@pg_query($this->db, 'ROLLBACK TO SAVEPOINT mysavepoint');
				}
			}
			$this->lastquery=$query;
			$this->results = $ret;
		}

		return $ret;
	}

	/**
	 *	\brief      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($resultset)
	{
        // If resultset not provided, we take the last used by connexion
		if (! is_resource($resultset)) { $resultset=$this->results; }
		return pg_fetch_object($resultset);
	}

	/**
	 * \brief      Renvoie les donnees dans un tableau.
	 * \param      resultset   Curseur de la requete voulue
	 * \return		array
	 */
	function fetch_array($resultset)
	{
        // If resultset not provided, we take the last used by connexion
		if (! is_resource($resultset)) { $resultset=$this->results; }
		return pg_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 pg_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($resultset)
	{
        // If resultset not provided, we take the last used by connexion
		if (! is_resource($resultset)) { $resultset=$this->results; }
		return pg_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($resultset)
	{
        // If resultset not provided, we take the last used by connexion
		if (! is_resource($resultset)) { $resultset=$this->results; }
		// pgsql necessite un resultset pour cette fonction contrairement
		// a mysql qui prend un link de base
		return pg_affected_rows($resultset);
	}


	/**
	 * \brief      Libere le dernier resultset utilise sur cette connexion.
	 * \param      resultset   Curseur de la requete voulue
	 */
	function free($resultset=0)
	{
        // If resultset not provided, we take the last used by connexion
		if (! is_resource($resultset)) { $resultset=$this->results; }
		// Si resultset en est un, on libere la memoire
		if (is_resource($resultset)) pg_free_result($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 lignes
	 * \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 ($offset > 0) return " LIMIT ".$limit." OFFSET ".$offset." ";
		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.=',';

				$return.=$val;
				if ($sortorder) $return.=' '.$sortorder;
			}
			return $return;
		}
		else
		{
			return '';
		}
	}


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

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

	/**
	 *	Convert (by PHP) a PHP server TZ string date into a GM Timestamps date
	 * 	19700101020000 -> 3600 with TZ+1
	 * 	@param		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,$resko)
	{
		return '(CASE WHEN '.$test.' THEN '.$resok.' ELSE '.$resko.' END)';
	}


	/**
	 *   \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 MySql 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',
			1044 => 'DB_ERROR_ACCESSDENIED',
			1046 => 'DB_ERROR_NODBSELECTED',
			1048 => 'DB_ERROR_CONSTRAINT',
			'42P07' => 'DB_ERROR_TABLE_OR_KEY_ALREADY_EXISTS',
			'42703' => 'DB_ERROR_NOSUCHFIELD',
			1060 => 'DB_ERROR_COLUMN_ALREADY_EXISTS',
			42701=> 'DB_ERROR_COLUMN_ALREADY_EXISTS',
			'42710' => 'DB_ERROR_KEY_NAME_ALREADY_EXISTS',
			'23505' => 'DB_ERROR_RECORD_ALREADY_EXISTS',
			'42704' => 'DB_ERROR_NO_INDEX_TO_DROP',
			'42601' => 'DB_ERROR_SYNTAX',
			'42P16' => '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',
			'42P01' => 'DB_ERROR_NOSUCHTABLE',
			'23503' => 'DB_ERROR_NO_PARENT',
			1217 => 'DB_ERROR_CHILD_EXISTS',
			1451 => 'DB_ERROR_CHILD_EXISTS',
			'42P04' => 'DB_DATABASE_ALREADY_EXISTS'
			);

			$errorlabel=pg_last_error($this->db);
			$errorcode='';
			if (preg_match('/: *([0-9P]+):/',$errorlabel,$reg))
			{
				$errorcode=$reg[1];
				if (isset($errorcode_map[$errorcode]))
				{
					return $errorcode_map[$errorcode];
				}
			}
			$errno=$errorcode?$errorcode:$errorlabel;
			return ($errno?'DB_ERROR_'.$errno:'0');
		}
		//                '/(Table does not exist\.|Relation [\"\'].*[\"\'] does not exist|sequence does not exist|class ".+" not found)$/' => 'DB_ERROR_NOSUCHTABLE',
		//                '/table [\"\'].*[\"\'] does not exist/' => 'DB_ERROR_NOSUCHTABLE',
		//                '/Relation [\"\'].*[\"\'] already exists|Cannot insert a duplicate key into (a )?unique index.*/'      => 'DB_ERROR_RECORD_ALREADY_EXISTS',
		//                '/divide by zero$/'                     => 'DB_ERROR_DIVZERO',
		//                '/pg_atoi: error in .*: can\'t parse /' => 'DB_ERROR_INVALID_NUMBER',
		//                '/ttribute [\"\'].*[\"\'] not found$|Relation [\"\'].*[\"\'] does not have attribute [\"\'].*[\"\']/' => 'DB_ERROR_NOSUCHFIELD',
		//                '/parser: parse error at or near \"/'   => 'DB_ERROR_SYNTAX',
		//                '/referential integrity violation/'     => 'DB_ERROR_CONSTRAINT'
	}

	/**
	 * \brief 		Renvoie le texte de l'erreur pgsql de l'operation precedente.
	 * \return		error_text
	 */
	function error()
	{
		return pg_last_error($this->db);
	}

	/**
	 * \brief		Get last ID after an insert INSERT.
	 * \param     	tab     Table name concerned by insert. Ne sert pas sous MySql mais requis pour compatibilite avec Postgresql
	 * \return     	int     id
	 */
	function last_insert_id($tab,$fieldid='rowid')
	{
		//$result = pg_query($this->db,"SELECT MAX(".$fieldid.") FROM ".$tab);
		$result = pg_query($this->db,"SELECT currval('".$tab."_".$fieldid."_seq')");
		if (! $result)
		{
			print pg_last_error($this->db);
			exit;
		}
		//$nbre = pg_num_rows($result);
		$row = pg_fetch_result($result,0,0);
		return $row;
	}

	/**
     *  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()
	{
		return '?';
	}


	/**
	 *	\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
	 * 	\param			owner			Username of database owner
	 * 	\return	        resource		resource defined if OK, null if KO
	 *  \remarks        Ne pas utiliser les fonctions xxx_create_db (xxx=mysql, ...) car elles sont deprecated
	 */
	function DDLCreateDb($database,$charset='',$collation='',$owner='')
	{
		if (empty($charset))   $charset=$this->forcecharset;
		if (empty($collation)) $collation=$this->collation;

		$ret=$this->query('CREATE DATABASE '.$database.' OWNER '.$owner.' ENCODING \''.$charset.'\'');
		return $ret;
	}

	/**
	 * \brief      Liste des tables dans une database.
	 * \param	    database	Nom de la database
	 * \return	    resource
	 */
	function DDLListTables($database, $table='')
	{
		$listtables=array();

		$like = '';
		if ($table) $like = " AND table_name LIKE '".$table."'";
		$result = pg_query($this->db, "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public'".$like." ORDER BY table_name");
		while($row = $this->fetch_row($result))
		{
			$listtables[] = $row[0];
		}
		return  $listtables;
	}

	/**
	 *	\brief     	Liste les informations des champs d'une table.
	 *	\param	    table			Nom de la table
	 *	\return	    array			Tableau des informations des champs de la table
	 *	TODO modifier pour postgresql
	 */
	function DDLInfoTable($table)
	{
		/*
		 $infotables=array();

		 $sql="SHOW FULL COLUMNS FROM ".$table.";";

		 dol_syslog($sql,LOG_DEBUG);
		 $result = $this->pg_query($this->db,$sql);
		 while($row = $this->fetch_row($result))
		 {
			$infotables[] = $row;
			}
			return $infotables;
			*/
	}


	/**
	 *	\brief      Cree une table
	 *	\param	    table 			Nom de la table
	 *	\param	    fields 			Tableau associatif [nom champ][tableau des descriptions]
	 *	\param	    primary_key 	Nom du champ qui sera la clef primaire
	 *	\param	    unique_keys 	Tableau associatifs Nom de champs qui seront clef unique => valeur
	 *	\param	    fulltext 		Tableau des Nom de champs qui seront indexes en fulltext
	 *	\param	    key 			Tableau des champs cles noms => valeur
	 *	\param	    type 			Type de la table
	 *	\return	    int				<0 si KO, >=0 si OK
	 * TODO
	 */
	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,LOG_DEBUG);
		if(! $this -> query($sql))
		return -1;
		else
		return 1;
	}

	/**
	 * 	\brief      Create a user
	 *	\param	    dolibarr_main_db_host 		Ip serveur
	 *	\param	    dolibarr_main_db_user 		Nom user a creer
	 *	\param	    dolibarr_main_db_pass 		Mot de passe user a creer
	 *	\param		dolibarr_main_db_name		Database name where user must be granted
	 *	\return	    int							<0 si KO, >=0 si OK
	 */
	function DDLCreateUser($dolibarr_main_db_host,$dolibarr_main_db_user,$dolibarr_main_db_pass,$dolibarr_main_db_name)
	{
		$sql = "create user \"".addslashes($dolibarr_main_db_user)."\" with password '".addslashes($dolibarr_main_db_pass)."'";

		dol_syslog("pgsql.lib::DDLCreateUser", LOG_DEBUG);	// No sql to avoid password in log
		$resql=$this->query($sql);
		if (! $resql)
		{
			return -1;
		}

		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="")
	{
		$sql ="SELECT attname FROM pg_attribute, pg_type WHERE typname = '".$table."' AND attrelid = typrelid";
		$sql.=" AND attname NOT IN ('cmin', 'cmax', 'ctid', 'oid', 'tableoid', 'xmin', 'xmax')";
		if ($field) $sql.= " AND attname = '".$field."'";

		dol_syslog($sql,LOG_DEBUG);
		$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 .= $field_desc['type'];
		if ($field_desc['type'] != 'int' && 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;

		dol_syslog($sql,LOG_DEBUG);
		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;
	}

	/**
	 *	\brief		Return charset used to store data in database
	 *	\return		string		Charset
	 */
	function getDefaultCharacterSetDatabase()
	{
		$resql=$this->query('SHOW SERVER_ENCODING');
		$liste=$this->fetch_array($resql);
		return $liste['server_encoding'];
	}

	/**
	 *	\brief		Return list of available charset that can be used to store data in database
	 *	\return		array		List of Charset
	 */
	function getListOfCharacterSet()
	{
		$resql=$this->query('SHOW SERVER_ENCODING');
		$liste = array();
		if ($resql)
		{
			$i = 0;
			while ($obj = $this->fetch_object($resql) )
			{
				$liste[$i]['charset'] = $obj->server_encoding;
				$liste[$i]['description'] = 'Default database charset';
				$i++;
			}
			$this->free($resql);
		} else {
			return null;
		}
		return $liste;
	}

	/**
	 *	\brief		Return collation used in database
	 *	\return		string		Collation value
	 */
	function getDefaultCollationDatabase()
	{
		$resql=$this->query('SHOW LC_COLLATE');
		$liste=$this->fetch_array($resql);
		return $liste['lc_collate'];
	}

	/**
	 *	\brief		Return list of available collation that can be used for database
	 *	\return		array		Liste of Collation
	 */
	function getListOfCollation()
	{
		$resql=$this->query('SHOW LC_COLLATE');
		$liste = array();
		if ($resql)
		{
			$i = 0;
			while ($obj = $this->fetch_object($resql) )
			{
				$liste[$i]['collation'] = $obj->lc_collate;
				$i++;
			}
			$this->free($resql);
		} else {
			return null;
		}
		return $liste;
	}

	/**
	 *	\brief		Return full path of dump program
	 *	\return		string		Full path of dump program
	 */
	function getPathOfDump()
	{
		$fullpathofdump='/pathtopgdump/pg_dump';

		if (file_exists('/usr/bin/pg_dump'))
		{
		    $fullpathofdump='/usr/bin/pg_dump';
		}
		else
		{
            // TODO L'utilisateur de la base doit etre un superadmin pour lancer cette commande
		    $resql=$this->query('SHOW data_directory');
    		if ($resql)
    		{
    			$liste=$this->fetch_array($resql);
    			$basedir=$liste['data_directory'];
    			$fullpathofdump=preg_replace('/data$/','bin',$basedir).'/pg_dump';
    		}
		}

		return $fullpathofdump;
	}

	/**
	 *	\brief		Return full path of restore program
	 *	\return		string		Full path of restore program
	 */
	function getPathOfRestore()
	{
		$fullpathofdump='/pathtopgrestore/pg_restore';

        if (file_exists('/usr/bin/pg_restore'))
        {
            $fullpathofdump='/usr/bin/pg_restore';
        }
        else
        {
            // TODO L'utilisateur de la base doit etre un superadmin pour lancer cette commande
            $resql=$this->query('SHOW data_directory');
            if ($resql)
            {
                $liste=$this->fetch_array($resql);
                $basedir=$liste['data_directory'];
                $fullpathofdump=preg_replace('/data$/','bin',$basedir).'/pg_restore';
            }
        }

		return $fullpathofdump;
	}

	/**
	 *	\brief		Return value of server parameters
	 * 	\param		filter		Filter list on a particular value
	 *	\return		string		Value for parameter
	 */
	function getServerParametersValues($filter='')
	{
		$result=array();

		$resql='select name,setting from pg_settings';
		if ($filter) $resql.=" WHERE name = '".addslashes($filter)."'";
		$resql=$this->query($resql);
		if ($resql)
		{
			$obj=$this->fetch_object($resql);
			$result[$obj->name]=$obj->setting;
		}

		return $result;
	}
}
?>