[REF] expression: use and return a Query object

The management of the join contexts now relies on the `Query` object,
that has all the necessary logic to do so.  The refactoring also removes
the class `ExtendedLeaf`, which is no longer necessary: the join
contexts are all managed by a single `Query` object, and the parsing
stack now only contains triples like (leaf, model, table_alias).

Also inline directly the SQL translation made in `_to_sql`, which
overall simplifies the management of SQL parameters in the domain
compilation.  The algorithm is illustrated in the code itself.

1 files changed, 2 insertions, 7 deletions

diff --git a/odoo/models.py b/odoo/models.py
index bbdb91b0369..e9a5f9ff636 100644
--- a/odoo/models.py
+++ b/odoo/models.py
@@ -4112,14 +4112,9 @@ Record ids: %(records)s
                 domain = [(self._active_name, '=', 1)] + domain
 
         if domain:
-            e = expression.expression(domain, self)
-            tables = e.get_tables()
-            where_clause, where_params = e.to_sql()
-            where_clause = [where_clause] if where_clause else []
+            return expression.expression(domain, self).query
         else:
-            where_clause, where_params, tables = [], [], ['"%s"' % self._table]
-
-        return Query(tables, where_clause, where_params)
+            return Query(['"%s"' % self._table])
 
     def _check_qorder(self, word):
         if not regex_order.match(word):