[IMP] bi_sql_editor : Allow to use sum / avg operator on tree view

bi_sql_editor/migrations/16.0.2.0.0/post-migration.py

@@ -8,4 +8,7 @@ from openupgradelib import openupgrade
 @openupgrade.migrate()
 def migrate(env, version):
     for view in env["bi.sql.view"].search([("state", "=", "ui_valid")]):
+        # create new Form view
         view.form_view_id = env["ir.ui.view"].create(view._prepare_form_view()).id
+        # Update tree view, to add sum / avg option
+        view.tree_view_id.write(view._prepare_tree_view())