diff options
Diffstat (limited to 'lib/sqlalchemy/sql/selectable.py')
| -rw-r--r-- | lib/sqlalchemy/sql/selectable.py | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/lib/sqlalchemy/sql/selectable.py b/lib/sqlalchemy/sql/selectable.py index bd1d04e57..6ef327b95 100644 --- a/lib/sqlalchemy/sql/selectable.py +++ b/lib/sqlalchemy/sql/selectable.py @@ -1673,7 +1673,7 @@ class ForUpdateArg(ClauseElement): @classmethod def parse_legacy_select(self, arg): - """Parse the for_update arugment of :func:`.select`. + """Parse the for_update argument of :func:`.select`. :param mode: Defines the lockmode to use. @@ -1723,7 +1723,9 @@ class ForUpdateArg(ClauseElement): if self.of is not None: self.of = [clone(col, **kw) for col in self.of] - def __init__(self, nowait=False, read=False, of=None, skip_locked=False): + def __init__( + self, nowait=False, read=False, of=None, + skip_locked=False, key_share=False): """Represents arguments specified to :meth:`.Select.for_update`. .. versionadded:: 0.9.0 @@ -1733,6 +1735,7 @@ class ForUpdateArg(ClauseElement): self.nowait = nowait self.read = read self.skip_locked = skip_locked + self.key_share = key_share if of is not None: self.of = [_interpret_as_column_or_from(elem) for elem in util.to_list(of)] @@ -1876,7 +1879,7 @@ class GenerativeSelect(SelectBase): @_generative def with_for_update(self, nowait=False, read=False, of=None, - skip_locked=False): + skip_locked=False, key_share=False): """Specify a ``FOR UPDATE`` clause for this :class:`.GenerativeSelect`. E.g.:: @@ -1917,12 +1920,16 @@ class GenerativeSelect(SelectBase): .. versionadded:: 1.1.0 - .. versionadded:: 0.9.0 + :param key_share: boolean, will render ``FOR NO KEY UPDATE``, + or if combined with ``read=True`` will render ``FOR KEY SHARE``, + on the Postgresql dialect. + .. versionadded:: 1.1.0 """ self._for_update_arg = ForUpdateArg(nowait=nowait, read=read, of=of, - skip_locked=skip_locked) + skip_locked=skip_locked, + key_share=key_share) @_generative def apply_labels(self): |