diff --git a/htdocs/core/db/DoliDB.class.php b/htdocs/core/db/DoliDB.class.php
index f85aa4ca78a..aa0792c5970 100644
--- a/htdocs/core/db/DoliDB.class.php
+++ b/htdocs/core/db/DoliDB.class.php
@@ -125,6 +125,71 @@ abstract class DoliDB implements Database
 		}
 	}
 
+	/**
+	 * Validate a database transaction
+	 *
+	 * @param	string	$log		Add more log to default log line
+	 * @return	int         		1 if validation is OK or transaction level no started, 0 if ERROR
+	 */
+	function commit($log='')
+	{
+		dol_syslog('',0,-1);
+		if ($this->transaction_opened<=1)
+		{
+			$ret=$this->query("COMMIT");
+			if ($ret)
+			{
+				$this->transaction_opened=0;
+				dol_syslog("COMMIT Transaction".($log?' '.$log:''),LOG_DEBUG);
+			}
+			return $ret;
+		}
+		else
+		{
+			$this->transaction_opened--;
+			return 1;
+		}
+	}
+
+	/**
+	 *	Annulation d'une transaction et retour aux anciennes valeurs
+	 *
+	 * 	@param	string	$log		Add more log to default log line
+	 * 	@return	int         		1 si annulation ok ou transaction non ouverte, 0 en cas d'erreur
+	 */
+	function rollback($log='')
+	{
+		dol_syslog('',0,-1);
+		if ($this->transaction_opened<=1)
+		{
+			$ret=$this->query("ROLLBACK");
+			$this->transaction_opened=0;
+			dol_syslog("ROLLBACK Transaction".($log?' '.$log:''),LOG_DEBUG);
+			return $ret;
+		}
+		else
+		{
+			$this->transaction_opened--;
+			return 1;
+		}
+	}
+
+	/**
+	 *	Define limits and offset of request
+	 *
+	 *	@param	int		$limit      Maximum number of lines returned (-1=conf->liste_limit, 0=no limit)
+	 *	@param	int		$offset     Numero of line from where starting fetch
+	 *	@return	string      		String with SQL syntax to add a limit and offset
+	 */
+	function plimit($limit=0,$offset=0)
+	{
+		global $conf;
+		if (empty($limit)) return "";
+		if ($limit < 0) $limit=$conf->liste_limit;
+		if ($offset > 0) return " LIMIT $offset,$limit ";
+		else return " LIMIT $limit ";
+	}
+
 	/**
 	 *	Return version of database server into an array
 	 *
diff --git a/htdocs/core/db/mssql.class.php b/htdocs/core/db/mssql.class.php
index 239582a6595..855b7a71026 100644
--- a/htdocs/core/db/mssql.class.php
+++ b/htdocs/core/db/mssql.class.php
@@ -466,24 +466,6 @@ class DoliDBMssql extends DoliDB
 		if (is_resource($resultset)) mssql_free_result($resultset);
 	}
 
-
-	/**
-     *	Define limits and offset of request
-     *
-     *	@param	int		$limit      Maximum number of lines returned (-1=conf->liste_limit, 0=no limit)
-     *	@param	int		$offset     Numero of line from where starting fetch
-     *	@return	string      		String with SQL syntax to add a limit and offset
-	 */
-	function plimit($limit=0,$offset=0)
-	{
-		global $conf;
-        if (empty($limit)) return "";
-		if ($limit < 0) $limit=$conf->liste_limit;
-		if ($offset > 0) return " LIMIT $offset,$limit ";
-		else return " LIMIT $limit ";
-	}
-
-
 	/**
 	 *	Escape a string to insert data
 	 *
diff --git a/htdocs/core/db/mysql.class.php b/htdocs/core/db/mysql.class.php
index 582adbb343a..efe942caed5 100644
--- a/htdocs/core/db/mysql.class.php
+++ b/htdocs/core/db/mysql.class.php
@@ -239,55 +239,6 @@ class DoliDBMysql extends DoliDB
         return false;
     }
 
-	/**
-     * Validate a database transaction
-     *
-     * @param	string	$log        Add more log to default log line
-     * @return  int         		1 if validation is OK or transaction level no started, 0 if ERROR
-	 */
-	function commit($log='')
-	{
-		dol_syslog('',0,-1);
-		if ($this->transaction_opened<=1)
-		{
-			$ret=$this->query("COMMIT");
-			if ($ret)
-			{
-				$this->transaction_opened=0;
-				dol_syslog("COMMIT Transaction".($log?' '.$log:''),LOG_DEBUG);
-			}
-			return $ret;
-		}
-		else
-		{
-			$this->transaction_opened--;
-			return 1;
-		}
-	}
-
-	/**
-	 *	Annulation d'une transaction et retour aux anciennes valeurs
-	 *
-	 * 	@param	string	$log		Add more log to default log line
-	 * 	@return	int         		1 si annulation ok ou transaction non ouverte, 0 en cas d'erreur
-	 */
-	function rollback($log='')
-	{
-		dol_syslog('',0,-1);
-		if ($this->transaction_opened<=1)
-		{
-			$ret=$this->query("ROLLBACK");
-			$this->transaction_opened=0;
-			dol_syslog("ROLLBACK Transaction".($log?' '.$log:''),LOG_DEBUG);
-			return $ret;
-		}
-		else
-		{
-			$this->transaction_opened--;
-			return 1;
-		}
-	}
-
 	/**
 	 * Execute a SQL request and return the resultset
 	 *
@@ -414,24 +365,6 @@ class DoliDBMysql extends DoliDB
 		if (is_resource($resultset)) mysql_free_result($resultset);
 	}
 
-
-	/**
-     *	Define limits and offset of request
-     *
-     *	@param	int		$limit      Maximum number of lines returned (-1=conf->liste_limit, 0=no limit)
-     *	@param	int		$offset     Numero of line from where starting fetch
-     *	@return	string      		String with SQL syntax to add a limit and offset
-	 */
-	function plimit($limit=0,$offset=0)
-	{
-		global $conf;
-        if (empty($limit)) return "";
-		if ($limit < 0) $limit=$conf->liste_limit;
-		if ($offset > 0) return " LIMIT $offset,$limit ";
-		else return " LIMIT $limit ";
-	}
-
-
 	/**
 	 *	Escape a string to insert data
 	 *
diff --git a/htdocs/core/db/mysqli.class.php b/htdocs/core/db/mysqli.class.php
index 66fa531bf09..f2dd2e80359 100644
--- a/htdocs/core/db/mysqli.class.php
+++ b/htdocs/core/db/mysqli.class.php
@@ -243,55 +243,6 @@ class DoliDBMysqli extends DoliDB
         return false;
     }
 
-    /**
-     * Validate a database transaction
-     *
-     * @param	string	$log		Add more log to default log line
-     * @return	int         		1 if validation is OK or transaction level no started, 0 if ERROR
-     */
-    function commit($log='')
-    {
-		dol_syslog('',0,-1);
-    	if ($this->transaction_opened<=1)
-        {
-            $ret=$this->query("COMMIT");
-            if ($ret)
-            {
-                $this->transaction_opened=0;
-                dol_syslog("COMMIT Transaction".($log?' '.$log:''),LOG_DEBUG);
-            }
-            return $ret;
-        }
-        else
-        {
-            $this->transaction_opened--;
-            return 1;
-        }
-    }
-
-    /**
-     *	Annulation d'une transaction et retour aux anciennes valeurs
-     *
-     * 	@param	string	$log		Add more log to default log line
-     * 	@return	int         		1 si annulation ok ou transaction non ouverte, 0 en cas d'erreur
-     */
-    function rollback($log='')
-    {
-		dol_syslog('',0,-1);
-    	if ($this->transaction_opened<=1)
-        {
-            $ret=$this->query("ROLLBACK");
-            $this->transaction_opened=0;
-            dol_syslog("ROLLBACK Transaction".($log?' '.$log:''),LOG_DEBUG);
-            return $ret;
-        }
-        else
-        {
-            $this->transaction_opened--;
-            return 1;
-        }
-    }
-
     /**
      * 	Execute a SQL request and return the resultset
      *
@@ -425,24 +376,6 @@ class DoliDBMysqli extends DoliDB
         if (is_object($resultset)) mysqli_free_result($resultset);
     }
 
-
-    /**
-     *	Define limits and offset of request
-     *
-     *	@param	int		$limit      Maximum number of lines returned (-1=conf->liste_limit, 0=no limit)
-     *	@param	int		$offset     Numero of line from where starting fetch
-     *	@return	string      		String with SQL syntax to add a limit and offset
-     */
-    function plimit($limit=0,$offset=0)
-    {
-        global $conf;
-        if (empty($limit)) return "";
-        if ($limit < 0) $limit=$conf->liste_limit;
-        if ($offset > 0) return " LIMIT $offset,$limit ";
-        else return " LIMIT $limit ";
-    }
-
-
     /**
      *	Escape a string to insert data
      *
diff --git a/htdocs/core/db/pgsql.class.php b/htdocs/core/db/pgsql.class.php
index f8cb36e4044..9ed44faf548 100644
--- a/htdocs/core/db/pgsql.class.php
+++ b/htdocs/core/db/pgsql.class.php
@@ -448,82 +448,6 @@ class DoliDBPgsql extends DoliDB
         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;");
-			if ($ret)
-			{
-				$this->transaction_opened++;
-				dol_syslog("BEGIN Transaction",LOG_DEBUG);
-				dol_syslog('',0,1);
-			}
-			return $ret;
-		}
-		else
-		{
-			$this->transaction_opened++;
-			dol_syslog('',0,1);
-			return 1;
-		}
-	}
-
-	/**
-     * Validate a database transaction
-     *
-     * @param	string	$log        Add more log to default log line
-     * @return  int         		1 if validation is OK or transaction level no started, 0 if ERROR
-	 */
-	function commit($log='')
-	{
-		dol_syslog('',0,-1);
-		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;
-		}
-	}
-
-	/**
-	 * 	Annulation d'une transaction et retour aux anciennes valeurs
-	 *
-	 * 	@param	    string	$log	Add more log to default log line
-	 * 	@return	    int             1 si annulation ok ou transaction non ouverte, 0 en cas d'erreur
-	 */
-	function rollback($log='')
-	{
-		dol_syslog('',0,-1);
-		if ($this->transaction_opened<=1)
-		{
-			$ret=$this->query("ROLLBACK;");
-			$this->transaction_opened=0;
-			dol_syslog("ROLLBACK Transaction".($log?' '.$log:''),LOG_DEBUG);
-			return $ret;
-		}
-		else
-		{
-			$this->transaction_opened--;
-			return 1;
-		}
-	}
-
-
 	/**
 	 * Convert request to PostgreSQL syntax, execute it and return the resultset
 	 *
diff --git a/htdocs/core/db/sqlite.class.php b/htdocs/core/db/sqlite.class.php
index fe3ac4718a9..8c3e9fa9df3 100644
--- a/htdocs/core/db/sqlite.class.php
+++ b/htdocs/core/db/sqlite.class.php
@@ -368,55 +368,6 @@ class DoliDBSqlite extends DoliDB
         return false;
     }
 
-    /**
-     * Validate a database transaction
-     *
-     * @param	string	$log		Add more log to default log line
-     * @return	int         		1 if validation is OK or transaction level no started, 0 if ERROR
-     */
-    function commit($log='')
-    {
-		dol_syslog('',0,-1);
-    	if ($this->transaction_opened<=1)
-        {
-            $ret=$this->query("COMMIT");
-            if ($ret)
-            {
-                $this->transaction_opened=0;
-                dol_syslog("COMMIT Transaction".($log?' '.$log:''),LOG_DEBUG);
-            }
-            return $ret;
-        }
-        else
-       {
-       		$this->transaction_opened--;
-            return 1;
-        }
-    }
-
-    /**
-     *	Annulation d'une transaction et retour aux anciennes valeurs
-     *
-     * 	@param	string	$log		Add more log to default log line
-     * 	@return	int         		1 si annulation ok ou transaction non ouverte, 0 en cas d'erreur
-     */
-    function rollback($log='')
-    {
-		dol_syslog('',0,-1);
-    	if ($this->transaction_opened<=1)
-        {
-            $ret=$this->query("ROLLBACK");
-            $this->transaction_opened=0;
-            dol_syslog("ROLLBACK Transaction".($log?' '.$log:''),LOG_DEBUG);
-            return $ret;
-        }
-        else
-        {
-            $this->transaction_opened--;
-            return 1;
-        }
-    }
-
     /**
      * 	Execute a SQL request and return the resultset
      *
@@ -559,24 +510,6 @@ class DoliDBSqlite extends DoliDB
         if (is_object($resultset)) $resultset->closeCursor();
     }
 
-
-	/**
-     *	Define limits and offset of request
-     *
-     *	@param	int		$limit      Maximum number of lines returned (-1=conf->liste_limit, 0=no limit)
-     *	@param	int		$offset     Numero of line from where starting fetch
-     *	@return	string      		String with SQL syntax to add a limit and offset
-	 */
-    function plimit($limit=0,$offset=0)
-    {
-        global $conf;
-        if (empty($limit)) return "";
-        if ($limit < 0) $limit=$conf->liste_limit;
-        if ($offset > 0) return " LIMIT $offset,$limit ";
-        else return " LIMIT $limit ";
-    }
-
-
 	/**
 	 *	Escape a string to insert data
 	 *