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revert some changes around DDLGuard

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This commit is contained in:
Alexander Tokmakov 2020-03-30 17:53:05 +03:00
parent d012266440
commit 0eb351044c
4 changed files with 10 additions and 49 deletions
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30
dbms/src/Interpreters/DatabaseCatalog.cpp
View File

@ -139,13 +139,6 @@ void DatabaseCatalog::shutdown()
for (auto & database : current_databases)
database.second->shutdown();
{
std::lock_guard lock(tables_marked_droped_mutex);
for (auto & elem : tables_marked_droped)
if (elem.need_shutdown)
elem.table->shutdown();
}
std::lock_guard lock(databases_mutex);
assert(std::find_if_not(uuid_map.begin(), uuid_map.end(), [](const auto & elem) { return elem.map.empty(); }) == uuid_map.end());
databases.clear();
@ -482,7 +475,7 @@ void DatabaseCatalog::loadMarkedAsDroppedTables()
String full_path = path + it.name();
Strings name_parts;
boost::split(name_parts, it.name(), boost::is_any_of("."));
boost::split(name_parts, it.name(), boost::is_any_of(".")); // NOLINT: LLVM Bug 41141
if (name_parts.size() != 4) /// Unexpected file
continue;
@ -520,7 +513,6 @@ void DatabaseCatalog::enqueueDroppedTableCleanup(StorageID table_id, StoragePtr
assert(dropped_metadata_path == getPathForDroppedMetadata(table_id));
time_t drop_time;
bool need_shutdown = true;
if (table)
drop_time = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
else
@ -557,14 +549,13 @@ void DatabaseCatalog::enqueueDroppedTableCleanup(StorageID table_id, StoragePtr
}
drop_time = Poco::File(dropped_metadata_path).getLastModified().epochTime();
need_shutdown = false;
}
std::lock_guard lock(tables_marked_droped_mutex);
if (ignore_delay)
tables_marked_droped.push_front({table_id, table, dropped_metadata_path, 0, need_shutdown});
tables_marked_droped.push_front({table_id, table, dropped_metadata_path, 0});
else
tables_marked_droped.push_back({table_id, table, dropped_metadata_path, drop_time, need_shutdown});
tables_marked_droped.push_back({table_id, table, dropped_metadata_path, drop_time});
}
void DatabaseCatalog::dropTableDataTask()
@ -583,19 +574,14 @@ void DatabaseCatalog::dropTableDataTask()
// "time elapsed = " + std::to_string(current_time - elem.drop_time));
bool not_in_use = !elem.table || elem.table.unique();
bool old_enough = elem.drop_time + drop_delay_s < current_time;
return (not_in_use && old_enough) || elem.need_shutdown;
return not_in_use && old_enough;
});
if (it != tables_marked_droped.end() && !it->need_shutdown)
if (it != tables_marked_droped.end())
{
table = std::move(*it);
LOG_INFO(log, "Will try drop " + table.table_id.getNameForLogs());
tables_marked_droped.erase(it);
}
else if (it->need_shutdown)
{
table = *it;
it->need_shutdown = false;
}
}
catch (...)
{
@ -604,12 +590,6 @@ void DatabaseCatalog::dropTableDataTask()
if (table.table_id)
{
if (table.need_shutdown)
{
table.table->shutdown();
(*drop_task)->scheduleAfter(0);
return;
}
try
{

1
dbms/src/Interpreters/DatabaseCatalog.h
View File

@ -185,7 +185,6 @@ private:
StoragePtr table;
String metadata_path;
time_t drop_time;
bool need_shutdown{true};
};
using TablesMarkedAsDropped = std::list<TableMarkedAsDropped>;

16
dbms/src/Interpreters/InterpreterCreateQuery.cpp
View File

@ -539,26 +539,13 @@ BlockIO InterpreterCreateQuery::createTable(ASTCreateQuery & create)
String current_database = context.getCurrentDatabase();
String metadata_path_tmp;
bool created_tmp = false;
SCOPE_EXIT({ if (created_tmp) Poco::File(metadata_path_tmp).remove(); });
// If this is a stub ATTACH query, read the query definition from the database
if (create.attach && !create.storage && !create.columns_list)
{
auto database_name = create.database.empty() ? current_database : create.database;
auto database = DatabaseCatalog::instance().getDatabase(database_name);
//TODO do we really need it? refactor it if we do
if (database->getEngineName() == "Atomic")
{
metadata_path_tmp = database->getObjectMetadataPath(create.table) + ".tmp";
if (!Poco::File(metadata_path_tmp).createFile())
throw Exception("Cannot attach table because of concurrent query.", ErrorCodes::TABLE_ALREADY_EXISTS);
created_tmp = true;
}
bool if_not_exists = create.if_not_exists;
// Table SQL definition is available even if the table is detached
auto query = database->getCreateTableQuery(context, create.table);
create = query->as<ASTCreateQuery &>(); // Copy the saved create query, but use ATTACH instead of CREATE
@ -622,7 +609,6 @@ bool InterpreterCreateQuery::doCreateTable(/*const*/ ASTCreateQuery & create,
/** If the request specifies IF NOT EXISTS, we allow concurrent CREATE queries (which do nothing).
* If table doesnt exist, one thread is creating table, while others wait in DDLGuard.
*/
if (database->getEngineName() != "Atomic")
guard = DatabaseCatalog::instance().getDDLGuard(create.database, table_name);
/// Table can be created before or it can be created concurrently in another thread, while we were waiting in DDLGuard.

10
dbms/src/Interpreters/InterpreterDropQuery.cpp
View File

@ -75,10 +75,7 @@ BlockIO InterpreterDropQuery::executeToTable(
auto table_id = context.resolveStorageID(table_id_, Context::ResolveOrdinary);
std::unique_ptr<DDLGuard> ddl_guard;
if (auto db = DatabaseCatalog::instance().tryGetDatabase(table_id.database_name)) //FIXME
if (db->getEngineName() != "Atomic")
ddl_guard = (!query.no_ddl_lock ? DatabaseCatalog::instance().getDDLGuard(table_id.database_name, table_id.table_name) : nullptr);
auto ddl_guard = (!query.no_ddl_lock ? DatabaseCatalog::instance().getDDLGuard(table_id.database_name, table_id.table_name) : nullptr);
auto [database, table] = tryGetDatabaseAndTable(table_id.database_name, table_id.table_name, query.if_exists);
@ -115,12 +112,11 @@ BlockIO InterpreterDropQuery::executeToTable(
context.checkAccess(table->isView() ? AccessType::DROP_VIEW : AccessType::DROP_TABLE, table_id);
table->checkTableCanBeDropped();
table->shutdown();
TableStructureWriteLockHolder table_lock;
if (database->getEngineName() != "Atomic")
{
table->shutdown();
table_lock = table->lockExclusively(context.getCurrentQueryId());
}
database->dropTable(context, table_id.table_name, query.no_delay);
}