[PATCH 10/10] ddl: don't use txn_last_stmt on _cluster commit/rollback
Vladimir Davydov
vdavydov.dev at gmail.com
Wed Jul 3 22:30:12 MSK 2019
When we implement transactional DDL, txn_last_stmt won't necessarily
point to the right statement on commit or rollback so we must avoid
using it.
Note, replicas are still registered/unregisterd in the on_commit
trigger, but that's okay, as we don't really need _cluster space to
be in sync with the replica set.
---
src/box/alter.cc | 46 +++++++++++++++++++++++++---------------------
1 file changed, 25 insertions(+), 21 deletions(-)
diff --git a/src/box/alter.cc b/src/box/alter.cc
index dd66e46f..b470b763 100644
--- a/src/box/alter.cc
+++ b/src/box/alter.cc
@@ -3189,24 +3189,9 @@ on_replace_dd_schema(struct trigger * /* trigger */, void *event)
* with it.
*/
static void
-on_commit_dd_cluster(struct trigger *trigger, void *event)
+register_replica(struct trigger *trigger, void * /* event */)
{
- (void) trigger;
- struct txn_stmt *stmt = txn_last_stmt((struct txn *) event);
- struct tuple *new_tuple = stmt->new_tuple;
- struct tuple *old_tuple = stmt->old_tuple;
-
- if (new_tuple == NULL) {
- struct tt_uuid old_uuid;
- tuple_field_uuid_xc(stmt->old_tuple, BOX_CLUSTER_FIELD_UUID,
- &old_uuid);
- struct replica *replica = replica_by_uuid(&old_uuid);
- assert(replica != NULL);
- replica_clear_id(replica);
- return;
- } else if (old_tuple != NULL) {
- return; /* nothing to change */
- }
+ struct tuple *new_tuple = (struct tuple *)trigger->data;
uint32_t id = tuple_field_u32_xc(new_tuple, BOX_CLUSTER_FIELD_ID);
tt_uuid uuid;
@@ -3224,6 +3209,19 @@ on_commit_dd_cluster(struct trigger *trigger, void *event)
}
}
+static void
+unregister_replica(struct trigger *trigger, void * /* event */)
+{
+ struct tuple *old_tuple = (struct tuple *)trigger->data;
+
+ struct tt_uuid old_uuid;
+ tuple_field_uuid_xc(old_tuple, BOX_CLUSTER_FIELD_UUID, &old_uuid);
+
+ struct replica *replica = replica_by_uuid(&old_uuid);
+ assert(replica != NULL);
+ replica_clear_id(replica);
+}
+
/**
* A trigger invoked on replace in the space _cluster,
* which contains cluster configuration.
@@ -3276,6 +3274,11 @@ on_replace_dd_cluster(struct trigger *trigger, void *event)
"Space _cluster",
"updates of instance uuid");
}
+ } else {
+ struct trigger *on_commit;
+ on_commit = txn_alter_trigger_new(register_replica,
+ new_tuple);
+ txn_on_commit(txn, on_commit);
}
} else {
/*
@@ -3286,11 +3289,12 @@ on_replace_dd_cluster(struct trigger *trigger, void *event)
uint32_t replica_id =
tuple_field_u32_xc(old_tuple, BOX_CLUSTER_FIELD_ID);
replica_check_id(replica_id);
- }
- struct trigger *on_commit =
- txn_alter_trigger_new(on_commit_dd_cluster, NULL);
- txn_on_commit(txn, on_commit);
+ struct trigger *on_commit;
+ on_commit = txn_alter_trigger_new(unregister_replica,
+ old_tuple);
+ txn_on_commit(txn, on_commit);
+ }
}
/* }}} cluster configuration */
--
2.11.0
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