diff --git a/pgsql/drop-constraints.sql b/pgsql/drop-constraints.sql
new file mode 100644
index 00000000000..2bf0773b995
--- /dev/null
+++ b/pgsql/drop-constraints.sql
@@ -0,0 +1,36 @@
+-- ============================================================================
+-- Copyright (C) 2004 Benoit Mortier <benoit.mortier@opensides.be>
+--
+-- 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.
+--
+-- $Id$
+-- $Source$
+-- ============================================================================
+--
+-- Ce fichier sert a effacer les contraintes sur les tables de la database
+--
+-- ============================================================================
+
+ALTER TABLE llx_fichinter	DROP CONSTRAINT "fichinter_fk_soc_idp";
+
+ALTER TABLE llx_propal		DROP CONSTRAINT "propal_fk_soc_idp";
+
+ALTER TABLE llx_facture		DROP CONSTRAINT "facture_fk_soc_idp";
+
+ALTER TABLE llx_facturedet	DROP CONSTRAINT "facturedet_fk_facture_rowid";
+
+ALTER TABLE llx_facture_tva_sum	DROP CONSTRAINT "facture_tva_sum_fk_facture_rowid";
+
+ALTER TABLE llx_socpeople	DROP CONSTRAINT "socpeople_fk_soc_idp";