diff --git a/sql_export/demo/sql_export.xml b/sql_export/demo/sql_export.xml
index 70499c9f8..4e168a505 100644
--- a/sql_export/demo/sql_export.xml
+++ b/sql_export/demo/sql_export.xml
@@ -12,6 +12,6 @@ License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
         <field name="query">SELECT name, street FROM res_partner;</field>
     </record>
 
-    <function model="sql.export" name="button_clean_check_request" eval="([ref('sql_export.sql_export_partner')])"/>
+    <function model="sql.export" name="button_validate_sql_expression" eval="([ref('sql_export.sql_export_partner')])"/>
 
 </data></openerp>
diff --git a/sql_export/tests/test_sql_query.py b/sql_export/tests/test_sql_query.py
index f1e516dc4..ffcd4d2ad 100644
--- a/sql_export/tests/test_sql_query.py
+++ b/sql_export/tests/test_sql_query.py
@@ -1,23 +1,8 @@
 # -*- coding: utf-8 -*-
-##############################################################################
-#
-#    Author: Florian da Costa
-#    Copyright 2015 Akretion
-#
-#    This program is free software: you can redistribute it and/or modify
-#    it under the terms of the GNU Affero 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 distnaributed 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 Affero General Public License for more details.
-#
-#    You should have received a copy of the GNU Affero General Public License
-#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-##############################################################################
+# Copyright (C) 2015 Akretion (<http://www.akretion.com>)
+# @author: Florian da Costa
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
 import base64
 from openerp.tests.common import TransactionCase
 from openerp.exceptions import Warning as UserError
@@ -56,7 +41,7 @@ class TestExportSqlQuery(TransactionCase):
                 sql_export = self.sql_export_obj.create({
                     'name': 'test_prohibited',
                     'query': query})
-                sql_export.button_clean_check_request()
+                sql_export.button_validate_sql_expression()
 
     def test_authorized_queries(self):
         authorized_queries = [
@@ -67,7 +52,7 @@ class TestExportSqlQuery(TransactionCase):
             sql_export = self.sql_export_obj.create({
                 'name': 'test_authorized',
                 'query': query})
-            sql_export.button_clean_check_request()
+            sql_export.button_validate_sql_expression()
             self.assertEqual(
                 sql_export.state, 'sql_valid',
                 "%s is a valid request" % (query))
diff --git a/sql_export/views/sql_export_view.xml b/sql_export/views/sql_export_view.xml
index 2df21f33e..3fb33f9fb 100644
--- a/sql_export/views/sql_export_view.xml
+++ b/sql_export/views/sql_export_view.xml
@@ -10,8 +10,8 @@
             <form string="SQL export">
                 <sheet>
                     <header>
-                        <button name="button_clean_check_request" type="object" states="draft"
-                                string="Clean and Check Request" class="oe_highlight"/>
+                        <button name="button_validate_sql_expression" type="object" states="draft"
+                                string="Validate SQL Expression" class="oe_highlight"/>
                         <button name="button_set_draft" type="object" states="sql_valid"
                                 string="Set to Draft" groups="sql_request_abstract.group_sql_request_manager"/>
                         <button name="export_sql_query" string="Execute Query" states="sql_valid" type="object" class="oe_highlight"
diff --git a/sql_request_abstract/models/sql_request_mixin.py b/sql_request_abstract/models/sql_request_mixin.py
index bd6ad4085..d7df1f85c 100644
--- a/sql_request_abstract/models/sql_request_mixin.py
+++ b/sql_request_abstract/models/sql_request_mixin.py
@@ -14,7 +14,7 @@ from openerp import _, api, fields, models
 from openerp.exceptions import Warning as UserError
 
 
-class SQLRequestMixin(models.Model):
+class SQLRequestMixin(models.AbstractModel):
     _name = 'sql.request.mixin'
 
     _clean_query_enabled = True
@@ -60,7 +60,7 @@ class SQLRequestMixin(models.Model):
 
     query = fields.Text(
         string='Query', required=True, help="You can't use the following words"
-        ": DELETE, DROP, CREATE, INSERT, ALTER, TRUNCATE, EXECUTE, UPDATE")
+        ": DELETE, DROP, CREATE, INSERT, ALTER, TRUNCATE, EXECUTE, UPDATE.")
 
     state = fields.Selection(
         string='State', selection=STATE_SELECTION, default='draft',
@@ -82,7 +82,7 @@ class SQLRequestMixin(models.Model):
 
     # Action Section
     @api.multi
-    def button_clean_check_request(self):
+    def button_validate_sql_expression(self):
         for item in self:
             if item._clean_query_enabled:
                 item._clean_query()
@@ -198,7 +198,10 @@ class SQLRequestMixin(models.Model):
         self.env.cr.execute("SHOW server_version;")
         res = self.env.cr.fetchone()[0].split('.')
         minor_version = float('.'.join(res[:2]))
-        return minor_version >= 9.3
+        if minor_version < 9.3:
+            raise UserError(_(
+                "Materialized View requires PostgreSQL 9.3 or greater but"
+                " PostgreSQL %s is currently installed.") % (minor_version))
 
     @api.multi
     def _clean_query(self):
diff --git a/sql_request_abstract/security/ir_module_category.xml b/sql_request_abstract/security/ir_module_category.xml
index 2c7663336..0928edeeb 100644
--- a/sql_request_abstract/security/ir_module_category.xml
+++ b/sql_request_abstract/security/ir_module_category.xml
@@ -3,7 +3,7 @@
 <openerp><data>
 
     <record model="ir.module.category" id="category_sql_abstract">
-        <field name="name">Sql Request</field>
+        <field name="name">SQL Request</field>
     </record>
 
 </data></openerp>