From 779cd28acb1f7eb06f629c0ea4ded99b5ebb670a Mon Sep 17 00:00:00 2001
From: Mariusz Felisiak <felisiak.mariusz@gmail.com>
Date: Fri, 22 Sep 2023 06:01:11 +0200
Subject: Fixed #34840 -- Avoided casting string base fields on PostgreSQL.

Thanks Alex Vandiver for the report.

Regression in 09ffc5c1212d4ced58b708cbbf3dfbfb77b782ca.
---
 django/db/backends/postgresql/operations.py | 8 --------
 1 file changed, 8 deletions(-)

(limited to 'django/db/backends/postgresql')

diff --git a/django/db/backends/postgresql/operations.py b/django/db/backends/postgresql/operations.py
index 93eb982f4b..4a42126e81 100644
--- a/django/db/backends/postgresql/operations.py
+++ b/django/db/backends/postgresql/operations.py
@@ -154,14 +154,6 @@ class DatabaseOperations(BaseDatabaseOperations):
 
     def lookup_cast(self, lookup_type, internal_type=None):
         lookup = "%s"
-
-        if lookup_type == "isnull" and internal_type in (
-            "CharField",
-            "EmailField",
-            "TextField",
-        ):
-            return "%s::text"
-
         # Cast text lookups to text to allow things like filter(x__contains=4)
         if lookup_type in (
             "iexact",
-- 
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