id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
31797	MariaDB 10.4 SchemaTests failures	Tom Forbes	Mariusz Felisiak	"Running the master test suite on MariaDB 10.4 currently results in two errors:


{{{
======================================================================
ERROR [0.051s]: test_alter_not_unique_field_to_primary_key (schema.tests.SchemaTests)
----------------------------------------------------------------------

Traceback (most recent call last):
  File ""/tests/django/tests/schema/tests.py"", line 720, in test_alter_not_unique_field_to_primary_key
    editor.alter_field(Author, old_field, new_field, strict=True)
  File ""/tests/django/django/db/backends/base/schema.py"", line 572, in alter_field
    old_db_params, new_db_params, strict)
  File ""/tests/django/django/db/backends/base/schema.py"", line 776, in _alter_field
    self.execute(self._create_primary_key_sql(model, new_field))
  File ""/tests/django/django/db/backends/base/schema.py"", line 142, in execute
    cursor.execute(sql, params)
  File ""/tests/django/django/db/backends/utils.py"", line 66, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File ""/tests/django/django/db/backends/utils.py"", line 75, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File ""/tests/django/django/db/backends/utils.py"", line 84, in _execute
    return self.cursor.execute(sql, params)
  File ""/tests/django/django/db/utils.py"", line 90, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File ""/tests/django/django/db/backends/utils.py"", line 84, in _execute
    return self.cursor.execute(sql, params)
  File ""/tests/django/django/db/backends/mysql/base.py"", line 73, in execute
    return self.cursor.execute(query, args)
  File ""/usr/local/lib/python3.7/site-packages/MySQLdb/cursors.py"", line 206, in execute
    res = self._query(query)
  File ""/usr/local/lib/python3.7/site-packages/MySQLdb/cursors.py"", line 319, in _query
    db.query(q)
  File ""/usr/local/lib/python3.7/site-packages/MySQLdb/connections.py"", line 259, in query
    _mysql.connection.query(self, query)
django.db.utils.OperationalError: (1280, ""Incorrect index name 'schema_author_uuid_a01c5261_uniq'"")

======================================================================
ERROR [0.028s]: test_alter_pk_with_self_referential_field (schema.tests.SchemaTests)
----------------------------------------------------------------------

Traceback (most recent call last):
  File ""/tests/django/tests/schema/tests.py"", line 2954, in test_alter_pk_with_self_referential_field
    editor.alter_field(Node, old_field, new_field, strict=True)
  File ""/tests/django/django/db/backends/base/schema.py"", line 572, in alter_field
    old_db_params, new_db_params, strict)
  File ""/tests/django/django/db/backends/base/schema.py"", line 668, in _alter_field
    self.execute(self._rename_field_sql(model._meta.db_table, old_field, new_field, new_type))
  File ""/tests/django/django/db/backends/base/schema.py"", line 142, in execute
    cursor.execute(sql, params)
  File ""/tests/django/django/db/backends/utils.py"", line 66, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File ""/tests/django/django/db/backends/utils.py"", line 75, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File ""/tests/django/django/db/backends/utils.py"", line 84, in _execute
    return self.cursor.execute(sql, params)
  File ""/tests/django/django/db/utils.py"", line 90, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File ""/tests/django/django/db/backends/utils.py"", line 84, in _execute
    return self.cursor.execute(sql, params)
  File ""/tests/django/django/db/backends/mysql/base.py"", line 73, in execute
    return self.cursor.execute(query, args)
  File ""/usr/local/lib/python3.7/site-packages/MySQLdb/cursors.py"", line 206, in execute
    res = self._query(query)
  File ""/usr/local/lib/python3.7/site-packages/MySQLdb/cursors.py"", line 319, in _query
    db.query(q)
  File ""/usr/local/lib/python3.7/site-packages/MySQLdb/connections.py"", line 259, in query
    _mysql.connection.query(self, query)
django.db.utils.OperationalError: (1553, ""Cannot drop index 'PRIMARY': needed in a foreign key constraint"")

----------------------------------------------------------------------
}}}


I tested this with django-docker-box with the following command:

{{{
DJANGO_PATH=path PYTHON_VERSION=3.7 MARIADB_VERSION=10.4 docker-compose run mariadb schema.tests.SchemaTests
}}}
"	Bug	closed	Database layer (models, ORM)	dev	Normal	fixed	MariaDB		Accepted	1	0	0	0	1	0