potiuk commented on a change in pull request #16311:
URL: https://github.com/apache/airflow/pull/16311#discussion_r661017746
##########
File path: airflow/utils/session.py
##########
@@ -70,3 +70,29 @@ def wrapper(*args, **kwargs) -> RT:
return func(*args, session=session, **kwargs)
return wrapper
+
+
+@provide_session
[email protected]
+def create_global_lock(session=None, pg_lock_id=1, mysql_lock_name='init',
mysql_lock_timeout=1800):
+ """Contextmanager that will create and teardown a global db lock."""
+ dialect = session.connection().dialect
+ if dialect.name == 'postgresql':
+ session.connection().execute(f'select PG_ADVISORY_LOCK({pg_lock_id});')
+
+ if dialect.name == 'mysql' and dialect.server_version_info >= (
+ 5,
+ 6,
+ ):
+ session.connection().execute(f"select
GET_LOCK('{mysql_lock_name}',{mysql_lock_timeout});")
Review comment:
One more comment. We have - as of recently - `mssql` support. In order
to make it complete, we should support it too.
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