Refs #35149 -- Made equivalent db_default alterations noops.

This allows for an easier transition of preserving the literal nature of
non-compilable db_default.

1 files changed, 8 insertions, 0 deletions

diff --git a/django/db/backends/base/schema.py b/django/db/backends/base/schema.py
index dad3f8d916..ed91c6ab1b 100644
--- a/django/db/backends/base/schema.py
+++ b/django/db/backends/base/schema.py
@@ -1640,6 +1640,14 @@ class BaseDatabaseSchemaEditor:
         ):
             old_kwargs.pop("to", None)
             new_kwargs.pop("to", None)
+        # db_default can take many form but result in the same SQL.
+        if (
+            old_kwargs.get("db_default")
+            and new_kwargs.get("db_default")
+            and self.db_default_sql(old_field) == self.db_default_sql(new_field)
+        ):
+            old_kwargs.pop("db_default")
+            new_kwargs.pop("db_default")
         return self.quote_name(old_field.column) != self.quote_name(
             new_field.column
         ) or (old_path, old_args, old_kwargs) != (new_path, new_args, new_kwargs)