mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-30 05:30:51 +00:00
26dd6140b2
* "lock_acquire_timeout" controls for how long a query will continue to acquire each lock on its argument tables * "lock_acquire_timeout_for_background_operations" is a per-table setting for storages of *MergeTree family
107 lines
3.3 KiB
C++
107 lines
3.3 KiB
C++
#include <Parsers/ASTRenameQuery.h>
|
|
#include <Databases/IDatabase.h>
|
|
#include <Interpreters/Context.h>
|
|
#include <Interpreters/InterpreterRenameQuery.h>
|
|
#include <Storages/IStorage.h>
|
|
#include <Interpreters/DDLWorker.h>
|
|
#include <Access/AccessRightsElement.h>
|
|
#include <Common/typeid_cast.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
|
|
InterpreterRenameQuery::InterpreterRenameQuery(const ASTPtr & query_ptr_, Context & context_)
|
|
: query_ptr(query_ptr_), context(context_)
|
|
{
|
|
}
|
|
|
|
|
|
struct RenameDescription
|
|
{
|
|
RenameDescription(const ASTRenameQuery::Element & elem, const String & current_database) :
|
|
from_database_name(elem.from.database.empty() ? current_database : elem.from.database),
|
|
from_table_name(elem.from.table),
|
|
to_database_name(elem.to.database.empty() ? current_database : elem.to.database),
|
|
to_table_name(elem.to.table)
|
|
{}
|
|
|
|
String from_database_name;
|
|
String from_table_name;
|
|
|
|
String to_database_name;
|
|
String to_table_name;
|
|
};
|
|
|
|
|
|
BlockIO InterpreterRenameQuery::execute()
|
|
{
|
|
const auto & rename = query_ptr->as<const ASTRenameQuery &>();
|
|
|
|
if (!rename.cluster.empty())
|
|
return executeDDLQueryOnCluster(query_ptr, context, getRequiredAccess());
|
|
|
|
context.checkAccess(getRequiredAccess());
|
|
|
|
String path = context.getPath();
|
|
String current_database = context.getCurrentDatabase();
|
|
|
|
/** In case of error while renaming, it is possible that only part of tables was renamed
|
|
* or we will be in inconsistent state. (It is worth to be fixed.)
|
|
*/
|
|
|
|
std::vector<RenameDescription> descriptions;
|
|
descriptions.reserve(rename.elements.size());
|
|
|
|
/// Don't allow to drop tables (that we are renaming); don't allow to create tables in places where tables will be renamed.
|
|
TableGuards table_guards;
|
|
|
|
for (const auto & elem : rename.elements)
|
|
{
|
|
descriptions.emplace_back(elem, current_database);
|
|
const auto & description = descriptions.back();
|
|
|
|
UniqueTableName from(description.from_database_name, description.from_table_name);
|
|
UniqueTableName to(description.to_database_name, description.to_table_name);
|
|
|
|
table_guards[from];
|
|
table_guards[to];
|
|
}
|
|
|
|
auto & database_catalog = DatabaseCatalog::instance();
|
|
|
|
/// Must do it in consistent order.
|
|
for (auto & table_guard : table_guards)
|
|
table_guard.second = database_catalog.getDDLGuard(table_guard.first.database_name, table_guard.first.table_name);
|
|
|
|
for (auto & elem : descriptions)
|
|
{
|
|
if (!rename.exchange)
|
|
database_catalog.assertTableDoesntExist(StorageID(elem.to_database_name, elem.to_table_name));
|
|
|
|
database_catalog.getDatabase(elem.from_database_name)->renameTable(
|
|
context,
|
|
elem.from_table_name,
|
|
*database_catalog.getDatabase(elem.to_database_name),
|
|
elem.to_table_name,
|
|
rename.exchange);
|
|
}
|
|
|
|
return {};
|
|
}
|
|
|
|
AccessRightsElements InterpreterRenameQuery::getRequiredAccess() const
|
|
{
|
|
AccessRightsElements required_access;
|
|
const auto & rename = query_ptr->as<const ASTRenameQuery &>();
|
|
for (const auto & elem : rename.elements)
|
|
{
|
|
required_access.emplace_back(AccessType::SELECT | AccessType::DROP_TABLE, elem.from.database, elem.from.table);
|
|
required_access.emplace_back(AccessType::CREATE_TABLE | AccessType::INSERT, elem.to.database, elem.to.table);
|
|
}
|
|
return required_access;
|
|
}
|
|
|
|
}
|