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Merge pull request #69670 from ClickHouse/sync-executeToDatabaseImpl-with-private-fork

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sync changes to `InterpreterDropQuery::executeToDatabaseImpl` from the private fork
This commit is contained in:
Miсhael Stetsyuk 2024-09-17 16:54:15 +00:00 committed by GitHub
commit 9eba103c5e
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1 changed files with 82 additions and 83 deletions
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165
src/Interpreters/InterpreterDropQuery.cpp
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@ -380,100 +380,99 @@ BlockIO InterpreterDropQuery::executeToDatabase(const ASTDropQuery & query)
BlockIO InterpreterDropQuery::executeToDatabaseImpl(const ASTDropQuery & query, DatabasePtr & database, std::vector<UUID> & uuids_to_wait)
{
if (query.kind != ASTDropQuery::Kind::Detach && query.kind != ASTDropQuery::Kind::Drop && query.kind != ASTDropQuery::Kind::Truncate)
return {};
const auto & database_name = query.getDatabase();
auto ddl_guard = DatabaseCatalog::instance().getDDLGuard(database_name, "");
database = tryGetDatabase(database_name, query.if_exists);
if (database)
if (!database)
return {};
bool drop = query.kind == ASTDropQuery::Kind::Drop;
bool truncate = query.kind == ASTDropQuery::Kind::Truncate;
getContext()->checkAccess(AccessType::DROP_DATABASE, database_name);
if (query.kind == ASTDropQuery::Kind::Detach && query.permanently)
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "DETACH PERMANENTLY is not implemented for databases");
if (query.if_empty)
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "DROP IF EMPTY is not implemented for databases");
if (!truncate && database->hasReplicationThread())
database->stopReplication();
if (database->shouldBeEmptyOnDetach())
{
if (query.kind == ASTDropQuery::Kind::Detach || query.kind == ASTDropQuery::Kind::Drop
|| query.kind == ASTDropQuery::Kind::Truncate)
/// Cancel restarting replicas in that database, wait for remaining RESTART queries to finish.
/// So it will not startup tables concurrently with the flushAndPrepareForShutdown call below.
auto restart_replica_lock = DatabaseCatalog::instance().getLockForDropDatabase(database_name);
ASTDropQuery query_for_table;
query_for_table.kind = query.kind;
// For truncate operation on database, drop the tables
if (truncate)
query_for_table.kind = query.has_all_tables ? ASTDropQuery::Kind::Truncate : ASTDropQuery::Kind::Drop;
query_for_table.if_exists = true;
query_for_table.if_empty = false;
query_for_table.setDatabase(database_name);
query_for_table.sync = query.sync;
/// Flush should not be done if shouldBeEmptyOnDetach() == false,
/// since in this case getTablesIterator() may do some additional work,
/// see DatabaseMaterializedMySQL::getTablesIterator()
auto table_context = Context::createCopy(getContext());
table_context->setInternalQuery(true);
/// Do not hold extra shared pointers to tables
std::vector<std::pair<StorageID, bool>> tables_to_drop;
// NOTE: This means we wait for all tables to be loaded inside getTablesIterator() call in case of `async_load_databases = true`.
for (auto iterator = database->getTablesIterator(table_context); iterator->isValid(); iterator->next())
{
bool drop = query.kind == ASTDropQuery::Kind::Drop;
bool truncate = query.kind == ASTDropQuery::Kind::Truncate;
auto table_ptr = iterator->table();
tables_to_drop.push_back({table_ptr->getStorageID(), table_ptr->isDictionary()});
}
getContext()->checkAccess(AccessType::DROP_DATABASE, database_name);
if (query.kind == ASTDropQuery::Kind::Detach && query.permanently)
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "DETACH PERMANENTLY is not implemented for databases");
if (query.if_empty)
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "DROP IF EMPTY is not implemented for databases");
if (!truncate && database->hasReplicationThread())
database->stopReplication();
if (database->shouldBeEmptyOnDetach())
/// Prepare tables for shutdown in parallel.
ThreadPoolCallbackRunnerLocal<void> runner(getDatabaseCatalogDropTablesThreadPool().get(), "DropTables");
for (const auto & [name, _] : tables_to_drop)
{
auto table_ptr = DatabaseCatalog::instance().getTable(name, table_context);
runner([my_table_ptr = std::move(table_ptr)]()
{
/// Cancel restarting replicas in that database, wait for remaining RESTART queries to finish.
/// So it will not startup tables concurrently with the flushAndPrepareForShutdown call below.
auto restart_replica_lock = DatabaseCatalog::instance().getLockForDropDatabase(database_name);
my_table_ptr->flushAndPrepareForShutdown();
});
}
runner.waitForAllToFinishAndRethrowFirstError();
ASTDropQuery query_for_table;
query_for_table.kind = query.kind;
// For truncate operation on database, drop the tables
if (truncate)
query_for_table.kind = query.has_all_tables ? ASTDropQuery::Kind::Truncate : ASTDropQuery::Kind::Drop;
query_for_table.if_exists = true;
query_for_table.if_empty = false;
query_for_table.setDatabase(database_name);
query_for_table.sync = query.sync;
/// Flush should not be done if shouldBeEmptyOnDetach() == false,
/// since in this case getTablesIterator() may do some additional work,
/// see DatabaseMaterializedMySQL::getTablesIterator()
auto table_context = Context::createCopy(getContext());
table_context->setInternalQuery(true);
/// Do not hold extra shared pointers to tables
std::vector<std::pair<StorageID, bool>> tables_to_drop;
// NOTE: This means we wait for all tables to be loaded inside getTablesIterator() call in case of `async_load_databases = true`.
for (auto iterator = database->getTablesIterator(table_context); iterator->isValid(); iterator->next())
{
auto table_ptr = iterator->table();
tables_to_drop.push_back({table_ptr->getStorageID(), table_ptr->isDictionary()});
}
/// Prepare tables for shutdown in parallel.
ThreadPoolCallbackRunnerLocal<void> runner(getDatabaseCatalogDropTablesThreadPool().get(), "DropTables");
for (const auto & [name, _] : tables_to_drop)
{
auto table_ptr = DatabaseCatalog::instance().getTable(name, table_context);
runner([my_table_ptr = std::move(table_ptr)]()
{
my_table_ptr->flushAndPrepareForShutdown();
});
}
runner.waitForAllToFinishAndRethrowFirstError();
for (const auto & table : tables_to_drop)
{
query_for_table.setTable(table.first.getTableName());
query_for_table.is_dictionary = table.second;
DatabasePtr db;
UUID table_to_wait = UUIDHelpers::Nil;
executeToTableImpl(table_context, query_for_table, db, table_to_wait);
uuids_to_wait.push_back(table_to_wait);
}
}
// only if operation is DETACH
if ((!drop || !truncate) && query.sync)
{
/// Avoid "some tables are still in use" when sync mode is enabled
for (const auto & table_uuid : uuids_to_wait)
database->waitDetachedTableNotInUse(table_uuid);
}
/// Protects from concurrent CREATE TABLE queries
auto db_guard = DatabaseCatalog::instance().getExclusiveDDLGuardForDatabase(database_name);
// only if operation is DETACH
if (!drop || !truncate)
database->assertCanBeDetached(true);
/// DETACH or DROP database itself. If TRUNCATE skip dropping/erasing the database.
if (!truncate)
DatabaseCatalog::instance().detachDatabase(getContext(), database_name, drop, database->shouldBeEmptyOnDetach());
for (const auto & table : tables_to_drop)
{
query_for_table.setTable(table.first.getTableName());
query_for_table.is_dictionary = table.second;
DatabasePtr db;
UUID table_to_wait = UUIDHelpers::Nil;
executeToTableImpl(table_context, query_for_table, db, table_to_wait);
uuids_to_wait.push_back(table_to_wait);
}
}
// only if operation is DETACH
if ((!drop || !truncate) && query.sync)
{
/// Avoid "some tables are still in use" when sync mode is enabled
for (const auto & table_uuid : uuids_to_wait)
database->waitDetachedTableNotInUse(table_uuid);
}
/// Protects from concurrent CREATE TABLE queries
auto db_guard = DatabaseCatalog::instance().getExclusiveDDLGuardForDatabase(database_name);
// only if operation is DETACH
if (!drop || !truncate)
database->assertCanBeDetached(true);
/// DETACH or DROP database itself. If TRUNCATE skip dropping/erasing the database.
if (!truncate)
DatabaseCatalog::instance().detachDatabase(getContext(), database_name, drop, database->shouldBeEmptyOnDetach());
return {};
}