diff --git a/htdocs/install/mysql/migration/3.7.0-3.8.0.sql b/htdocs/install/mysql/migration/3.7.0-3.8.0.sql
new file mode 100755
index 00000000000..e324ac23c87
--- /dev/null
+++ b/htdocs/install/mysql/migration/3.7.0-3.8.0.sql
@@ -0,0 +1,29 @@
+--
+-- Be carefull to requests order.
+-- This file must be loaded by calling /install/index.php page
+-- when current version is 3.8.0 or higher.
+--
+-- To rename a table:       ALTER TABLE llx_table RENAME TO llx_table_new;
+-- To add a column:         ALTER TABLE llx_table ADD COLUMN newcol varchar(60) NOT NULL DEFAULT '0' AFTER existingcol;
+-- To rename a column:      ALTER TABLE llx_table CHANGE COLUMN oldname newname varchar(60);
+-- To drop a column:        ALTER TABLE llx_table DROP COLUMN oldname;
+-- To change type of field: ALTER TABLE llx_table MODIFY COLUMN name varchar(60);
+-- To drop a foreign key:   ALTER TABLE llx_table DROP FOREIGN KEY fk_name;
+-- To restrict request to Mysql version x.y use -- VMYSQLx.y
+-- To restrict request to Pgsql version x.y use -- VPGSQLx.y
+-- To make pk to be auto increment (mysql):    VMYSQL4.3 ALTER TABLE llx_c_shipment_mode CHANGE COLUMN rowid rowid INTEGER NOT NULL AUTO_INCREMENT;
+-- To make pk to be auto increment (postgres): VPGSQL8.2 NOT POSSIBLE. MUST DELETE/CREATE TABLE
+-- To set a field as NULL:                     VPGSQL8.2 ALTER TABLE llx_table ALTER COLUMN name DROP NOT NULL;
+-- To set a field as default NULL:             VPGSQL8.2 ALTER TABLE llx_table ALTER COLUMN name SET DEFAULT NULL;
+-- -- VPGSQL8.2 DELETE FROM llx_usergroup_user      WHERE fk_user      NOT IN (SELECT rowid from llx_user);
+-- -- VMYSQL4.1 DELETE FROM llx_usergroup_user      WHERE fk_usergroup NOT IN (SELECT rowid from llx_usergroup);
+
+--create table for price expressions and add column in product supplier
+create table llx_price_expression
+(
+  rowid     integer AUTO_INCREMENT PRIMARY KEY,
+  title     varchar(20) NOT NULL,
+  expression    varchar(80) NOT NULL
+)ENGINE=innodb;
+
+ALTER TABLE llx_product_fournisseur_price ADD fk_price_expression integer DEFAULT NULL;
\ No newline at end of file
diff --git a/htdocs/install/mysql/tables/llx_price_expression.sql b/htdocs/install/mysql/tables/llx_price_expression.sql
new file mode 100755
index 00000000000..2180302a0d5
--- /dev/null
+++ b/htdocs/install/mysql/tables/llx_price_expression.sql
@@ -0,0 +1,24 @@
+-- ============================================================================
+-- Copyright (C) 2014		Ion agorria			<ion@agorria.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 3 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/>.
+--
+-- ============================================================================
+
+create table llx_price_expression
+(
+	rowid			integer AUTO_INCREMENT PRIMARY KEY,
+	title			varchar(20) NOT NULL,
+	expression		varchar(80) NOT NULL
+)ENGINE=innodb;
diff --git a/htdocs/install/mysql/tables/llx_product_fournisseur_price.sql b/htdocs/install/mysql/tables/llx_product_fournisseur_price.sql
old mode 100644
new mode 100755
index e48c3ce6f82..a31ac762fee
--- a/htdocs/install/mysql/tables/llx_product_fournisseur_price.sql
+++ b/htdocs/install/mysql/tables/llx_product_fournisseur_price.sql
@@ -39,5 +39,6 @@ create table llx_product_fournisseur_price
   tva_tx				double(6,3) NOT NULL,
   info_bits				integer NOT NULL DEFAULT 0,
   fk_user				integer,
+  fk_price_expression				integer,
   import_key			varchar(14)                  -- Import key
 )ENGINE=innodb;