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wqy
2022-09-03 10:33:27 +08:00
parent 0832e557fe
commit f16a16991e
1 changed files with 4 additions and 4 deletions
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8
api/operation.py
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@@ -177,10 +177,10 @@ def pick_snapshot(name: str, tag: str) -> None:
cur.execute(f"update operation set redo_child = '{target}' where id = '{target_parents[1]}'") cur.execute(f"update operation set redo_child = '{target}' where id = '{target_parents[1]}'")
execute_redo(name) execute_redo(name)
# transaction is volatile, commit/rollback will destroy transaction. # transaction is volatile, commit/abort will destroy transaction.
# can not redo a rollback transaction. # can not redo an aborted transaction.
# but can undo a committed transaction... inconsistent... # but can undo a committed transaction... inconsistent...
# it may remove snapshot tag if snapshot in a rollback transaction # it may remove snapshot if it is in aborted transaction
def have_transaction(name: str) -> bool: def have_transaction(name: str) -> bool:
with conn[name].cursor(row_factory=dict_row) as cur: with conn[name].cursor(row_factory=dict_row) as cur:
@@ -189,7 +189,7 @@ def have_transaction(name: str) -> bool:
def start_transaction(name: str, strict: bool = False) -> None: def start_transaction(name: str, strict: bool = False) -> None:
if have_transaction(name): if have_transaction(name):
print("Only support single transaction now, please commit/rollback current transaction!") print("Only support single transaction now, please commit/abort current transaction!")
return return
curr = _get_current_operation(name) curr = _get_current_operation(name)