def isolation_level(fn):
return _chain_decorators_on(
fn,
only_on(('postgresql', 'sqlite', 'mysql'),
"DBAPI has no isolation level support"),
fails_on('postgresql+pypostgresql',
'pypostgresql bombs on multiple isolation level calls')
)
def update_from(fn):
"""Target must support UPDATE..FROM syntax"""
return only_on(['postgresql', 'mssql', 'mysql'],
"Backend does not support UPDATE..FROM")(fn)
