From 9bd3c9ba7daefac1ecec424f61df5952b80e4cdf Mon Sep 17 00:00:00 2001
From: Enric Tobella <enric.tobella@dixmit.com>
Date: Wed, 4 Dec 2024 10:20:20 +0100
Subject: [PATCH] [IMP] copy_columns: Only copy not null values

---
 openupgradelib/openupgrade.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/openupgradelib/openupgrade.py b/openupgradelib/openupgrade.py
index 80e6939c..9fdf9ed1 100644
--- a/openupgradelib/openupgrade.py
+++ b/openupgradelib/openupgrade.py
@@ -444,7 +444,8 @@ def copy_columns(cr, column_spec):
                 """
                 ALTER TABLE %(table_name)s
                 ADD COLUMN %(new)s %(field_type)s;
-                UPDATE %(table_name)s SET %(new)s=%(old)s;
+                UPDATE %(table_name)s SET %(new)s=%(old)s
+                WHERE %(old)s IS NOT NULL;
                 """
                 % {
                     "table_name": table_name,