Fixed #34105 -- Fixed crash of ordering by nested selected expression.

This stops ordering by nested selected references. It's not supported on
PostgreSQL and not required to support psycopg3.

Regression in 04518e310d.

Thanks Matt Westcott for the report.

django/db/models/sql/compiler.py

@@ -445,11 +445,6 @@ class SQLCompiler:
         """
         result = []
         seen = set()
-        replacements = {
-            expr: Ref(alias, expr)
-            for alias, expr in self.query.annotation_select.items()
-        }
-
         for expr, is_ref in self._order_by_pairs():
             resolved = expr.resolve_expression(self.query, allow_joins=True, reuse=None)
             if not is_ref and self.query.combinator and self.select:
@@ -478,7 +473,7 @@ class SQLCompiler:
                         q.add_annotation(expr_src, col_name)
                     self.query.add_select_col(resolved, col_name)
                     resolved.set_source_expressions([RawSQL(f"{order_by_idx}", ())])
-            sql, params = self.compile(resolved.replace_expressions(replacements))
+            sql, params = self.compile(resolved)
             # Don't add the same column twice, but the order direction is
             # not taken into account so we strip it. When this entire method
             # is refactored into expressions, then we can check each part as we

tests/ordering/tests.py

@@ -12,7 +12,7 @@ from django.db.models import (
     Subquery,
     Value,
 )
-from django.db.models.functions import Upper
+from django.db.models.functions import Length, Upper
 from django.test import TestCase
 
 from .models import (
@@ -599,3 +599,11 @@ class OrderingTests(TestCase):
             OrderedByExpressionGrandChild.objects.order_by("parent"),
             [g1, g2, g3],
         )
+
+    def test_order_by_expression_ref(self):
+        self.assertQuerySetEqual(
+            Author.objects.annotate(upper_name=Upper("name")).order_by(
+                Length("upper_name")
+            ),
+            Author.objects.order_by(Length(Upper("name"))),
+        )