ClickHouse/src/Storages/System/StorageSystemDatabases.cpp
2021-10-08 20:25:37 +08:00

55 lines
1.9 KiB
C++

#include <Databases/IDatabase.h>
#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypeUUID.h>
#include <Interpreters/Context.h>
#include <Access/ContextAccess.h>
#include <Storages/System/StorageSystemDatabases.h>
namespace DB
{
NamesAndTypesList StorageSystemDatabases::getNamesAndTypes()
{
return {
{"name", std::make_shared<DataTypeString>()},
{"engine", std::make_shared<DataTypeString>()},
{"data_path", std::make_shared<DataTypeString>()},
{"metadata_path", std::make_shared<DataTypeString>()},
{"uuid", std::make_shared<DataTypeUUID>()},
{"comment", std::make_shared<DataTypeString>()}
};
}
NamesAndAliases StorageSystemDatabases::getNamesAndAliases()
{
return {
{"database", std::make_shared<DataTypeString>(), "name"}
};
}
void StorageSystemDatabases::fillData(MutableColumns & res_columns, ContextPtr context, const SelectQueryInfo &) const
{
const auto access = context->getAccess();
const bool check_access_for_databases = !access->isGranted(AccessType::SHOW_DATABASES);
const auto databases = DatabaseCatalog::instance().getDatabases();
for (const auto & [database_name, database] : databases)
{
if (check_access_for_databases && !access->isGranted(AccessType::SHOW_DATABASES, database_name))
continue;
if (database_name == DatabaseCatalog::TEMPORARY_DATABASE)
continue; /// We don't want to show the internal database for temporary tables in system.databases
res_columns[0]->insert(database_name);
res_columns[1]->insert(database->getEngineName());
res_columns[2]->insert(context->getPath() + database->getDataPath());
res_columns[3]->insert(database->getMetadataPath());
res_columns[4]->insert(database->getUUID());
res_columns[5]->insert(database->getDatabaseComment());
}
}
}