From f4fb494f322c378bac5b606deeb168e00e7246fd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Tue, 13 Jan 2026 16:50:08 +0100
Subject: [PATCH] Ensure to always surround USING expression with parenthesis
 in CREATE INDEX

Closes #14487
(grafted from b45a29b26853324f65adc8c49b59a62d6f591529)

--HG--
branch : 7.0
---
 trytond/trytond/backend/postgresql/table.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/trytond/trytond/backend/postgresql/table.py b/trytond/trytond/backend/postgresql/table.py
index b11dad6bec..c51d437bfa 100644
--- a/trytond/trytond/backend/postgresql/table.py
+++ b/trytond/trytond/backend/postgresql/table.py
@@ -4,6 +4,7 @@ import logging
 import re
 
 from psycopg2.sql import SQL, Identifier
+from sql import Column
 
 from trytond.backend.table import (
     IndexTranslatorInterface, TableHandlerInterface)
@@ -581,11 +582,18 @@ class IndexMixin:
     @classmethod
     def _get_expression_variables(cls, expression, usage):
         variables = {
-            'expression': SQL(str(expression)),
             'collate': SQL(''),
             'opclass': SQL(''),
             'order': SQL(''),
             }
+        if isinstance(expression, Column):
+            variables['expression'] = SQL(str(expression))
+        else:
+            expression_str = str(expression)
+            if expression_str.startswith('(') and expression_str.endswith(')'):
+                variables['expression'] = SQL(expression)
+            else:
+                variables['expression'] = SQL(f'({expression})')
         if usage.options.get('collation'):
             variables['collate'] = SQL('COLLATE {}').format(
                 usage.options['collation'])