#24675: Skip "SET SQL_AUTO_IS_NULL = 0" on versions of MySQL that don't need it
-------------------------------------+-------------------------------------
Reporter: ssjunior | Owner: ssjunior
Type: | Status: new
Cleanup/optimization |
Component: Database layer | Version: 1.8
(models, ORM) |
Severity: Normal | Resolution:
Keywords: mysql | Triage Stage: Accepted
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 1
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Comment (by ssjunior):
I think that I have a better solution. Check in the features for the
status on the server and issue the command only if it is True on the
server. Tell me what do you think and if it is ok I will submitt a new PR.
https://github.com/ssjunior/django/commit/52bf6c7630ab6b17a3a3ff64213e1ad36d6fe270
{{{
@cached_property
def sql_auto_is_null(self):
"Return if server global variable sql_auto_is_null is set to True"
with self.connection.cursor() as cursor:
cursor.execute("SHOW GLOBAL VARIABLES LIKE
'sql_auto_is_null'")
return cursor.fetchone()[1] == 'ON'
def init_connection_state(self):
# SQL_AUTO_IS_NULL in MySQL controls whether an AUTO_INCREMENT
column
# on a recently-inserted row will return when the field is tested
for
# NULL. Disabling this value brings this aspect of MySQL in line
with
# SQL standards.
# Check the sql_auto_is_null status on the MySQL server and if
necessary
# set it to False.
if self.features.sql_auto_is_null:
with self.cursor() as cursor:
cursor.execute('SET SQL_AUTO_IS_NULL = 0')
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/24675#comment:6>
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