diff --git a/django/db/backends/base/operations.py b/django/db/backends/base/operations.py
index dba9fcbba8..60de2d6c79 100644
--- a/django/db/backends/base/operations.py
+++ b/django/db/backends/base/operations.py
@@ -8,7 +8,6 @@ import sqlparse
 
 from django.conf import settings
 from django.db import NotSupportedError, transaction
-from django.db.backends import utils
 from django.db.models.expressions import Col
 from django.utils import timezone
 from django.utils.deprecation import RemovedInDjango60Warning
@@ -586,7 +585,7 @@ class BaseDatabaseOperations:
         Transform a decimal.Decimal value to an object compatible with what is
         expected by the backend driver for decimal (numeric) columns.
         """
-        return utils.format_number(value, max_digits, decimal_places)
+        return value
 
     def adapt_ipaddressfield_value(self, value):
         """
diff --git a/django/db/backends/mysql/operations.py b/django/db/backends/mysql/operations.py
index 9741e6a985..9806303539 100644
--- a/django/db/backends/mysql/operations.py
+++ b/django/db/backends/mysql/operations.py
@@ -166,9 +166,6 @@ class DatabaseOperations(BaseDatabaseOperations):
         """
         return [(None, ("NULL", [], False))]
 
-    def adapt_decimalfield_value(self, value, max_digits=None, decimal_places=None):
-        return value
-
     def last_executed_query(self, cursor, sql, params):
         # With MySQLdb, cursor objects have an (undocumented) "_executed"
         # attribute where the exact query sent to the database is saved.
diff --git a/django/db/backends/oracle/operations.py b/django/db/backends/oracle/operations.py
index 86340bbf4a..79c6da994e 100644
--- a/django/db/backends/oracle/operations.py
+++ b/django/db/backends/oracle/operations.py
@@ -629,9 +629,6 @@ END;
             1900, 1, 1, value.hour, value.minute, value.second, value.microsecond
         )
 
-    def adapt_decimalfield_value(self, value, max_digits=None, decimal_places=None):
-        return value
-
     def combine_expression(self, connector, sub_expressions):
         lhs, rhs = sub_expressions
         if connector == "%%":
diff --git a/django/db/backends/postgresql/operations.py b/django/db/backends/postgresql/operations.py
index d89f81bf7e..8a0ca36a29 100644
--- a/django/db/backends/postgresql/operations.py
+++ b/django/db/backends/postgresql/operations.py
@@ -346,9 +346,6 @@ class DatabaseOperations(BaseDatabaseOperations):
     def adapt_timefield_value(self, value):
         return value
 
-    def adapt_decimalfield_value(self, value, max_digits=None, decimal_places=None):
-        return value
-
     def adapt_ipaddressfield_value(self, value):
         if value:
             return Inet(value)
diff --git a/docs/releases/5.2.txt b/docs/releases/5.2.txt
index b6c44c43f8..907159e36d 100644
--- a/docs/releases/5.2.txt
+++ b/docs/releases/5.2.txt
@@ -399,6 +399,8 @@ backends.
 * The new :meth:`Model._is_pk_set() <django.db.models.Model._is_pk_set>` method
   allows checking if a Model instance's primary key is defined.
 
+* ``BaseDatabaseOperations.adapt_decimalfield_value()`` is now a no-op, simply
+  returning the given value.
 
 :mod:`django.contrib.gis`
 -------------------------