mirror of
https://github.com/ClickHouse/ClickHouse.git
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60b7ad819d
* add system table marked_dropped_tables * add test * add test * fix * fix test * fix style * fix test * Update 25400_marked_dropped_tables.sql * Update 25400_marked_dropped_tables.sql * Update 25400_marked_dropped_tables.sql * Update 25400_marked_dropped_tables.sql * Update 25400_marked_dropped_tables.sql * fix * fix test * Update StorageSystemMarkedDroppedTables.cpp * fix * if table_mark_dropped.table is nullptr, engine set empty
1393 lines
52 KiB
C++
1393 lines
52 KiB
C++
#include <Interpreters/DatabaseCatalog.h>
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#include <Interpreters/Context.h>
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#include <Interpreters/loadMetadata.h>
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#include <Storages/IStorage.h>
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#include <Databases/IDatabase.h>
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#include <Databases/DatabaseMemory.h>
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#include <Databases/DatabaseOnDisk.h>
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#include <Disks/IDisk.h>
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#include <Common/quoteString.h>
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#include <Storages/StorageMemory.h>
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#include <Core/BackgroundSchedulePool.h>
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#include <Parsers/formatAST.h>
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#include <IO/ReadHelpers.h>
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#include <Poco/DirectoryIterator.h>
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#include <Common/atomicRename.h>
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#include <Common/CurrentMetrics.h>
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#include <Common/logger_useful.h>
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#include <Poco/Util/AbstractConfiguration.h>
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#include <Common/filesystemHelpers.h>
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#include <Common/noexcept_scope.h>
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#include <Common/checkStackSize.h>
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#include "config.h"
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#if USE_MYSQL
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# include <Databases/MySQL/MaterializedMySQLSyncThread.h>
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# include <Storages/StorageMaterializedMySQL.h>
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#endif
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#if USE_LIBPQXX
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# include <Databases/PostgreSQL/DatabaseMaterializedPostgreSQL.h>
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# include <Storages/PostgreSQL/StorageMaterializedPostgreSQL.h>
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#endif
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namespace CurrentMetrics
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{
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extern const Metric TablesToDropQueueSize;
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}
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int UNKNOWN_DATABASE;
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extern const int UNKNOWN_TABLE;
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extern const int TABLE_ALREADY_EXISTS;
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extern const int DATABASE_ALREADY_EXISTS;
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extern const int DATABASE_NOT_EMPTY;
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extern const int DATABASE_ACCESS_DENIED;
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extern const int LOGICAL_ERROR;
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extern const int HAVE_DEPENDENT_OBJECTS;
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}
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TemporaryTableHolder::TemporaryTableHolder(ContextPtr context_, const TemporaryTableHolder::Creator & creator, const ASTPtr & query)
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: WithContext(context_->getGlobalContext())
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, temporary_tables(DatabaseCatalog::instance().getDatabaseForTemporaryTables().get())
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{
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ASTPtr original_create;
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ASTCreateQuery * create = dynamic_cast<ASTCreateQuery *>(query.get());
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String global_name;
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if (create)
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{
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original_create = create->clone();
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if (create->uuid == UUIDHelpers::Nil)
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create->uuid = UUIDHelpers::generateV4();
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id = create->uuid;
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create->setTable("_tmp_" + toString(id));
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global_name = create->getTable();
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create->setDatabase(DatabaseCatalog::TEMPORARY_DATABASE);
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}
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else
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{
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id = UUIDHelpers::generateV4();
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global_name = "_tmp_" + toString(id);
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}
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auto table_id = StorageID(DatabaseCatalog::TEMPORARY_DATABASE, global_name, id);
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auto table = creator(table_id);
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DatabaseCatalog::instance().addUUIDMapping(id);
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temporary_tables->createTable(getContext(), global_name, table, original_create);
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table->startup();
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}
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TemporaryTableHolder::TemporaryTableHolder(
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ContextPtr context_,
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const ColumnsDescription & columns,
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const ConstraintsDescription & constraints,
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const ASTPtr & query,
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bool create_for_global_subquery)
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: TemporaryTableHolder(
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context_,
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[&](const StorageID & table_id)
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{
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auto storage = std::make_shared<StorageMemory>(table_id, ColumnsDescription{columns}, ConstraintsDescription{constraints}, String{});
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if (create_for_global_subquery)
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storage->delayReadForGlobalSubqueries();
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return storage;
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},
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query)
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{
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}
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TemporaryTableHolder::TemporaryTableHolder(TemporaryTableHolder && rhs) noexcept
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: WithContext(rhs.context), temporary_tables(rhs.temporary_tables), id(rhs.id)
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{
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rhs.id = UUIDHelpers::Nil;
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}
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TemporaryTableHolder & TemporaryTableHolder::operator=(TemporaryTableHolder && rhs) noexcept
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{
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id = rhs.id;
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rhs.id = UUIDHelpers::Nil;
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return *this;
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}
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TemporaryTableHolder::~TemporaryTableHolder()
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{
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if (id != UUIDHelpers::Nil)
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{
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try
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{
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auto table = getTable();
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table->flushAndShutdown();
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temporary_tables->dropTable(getContext(), "_tmp_" + toString(id));
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}
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catch (...)
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{
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tryLogCurrentException("TemporaryTableHolder");
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}
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}
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}
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StorageID TemporaryTableHolder::getGlobalTableID() const
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{
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return StorageID{DatabaseCatalog::TEMPORARY_DATABASE, "_tmp_" + toString(id), id};
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}
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StoragePtr TemporaryTableHolder::getTable() const
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{
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auto table = temporary_tables->tryGetTable("_tmp_" + toString(id), getContext());
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if (!table)
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throw Exception(ErrorCodes::LOGICAL_ERROR, "Temporary table {} not found", getGlobalTableID().getNameForLogs());
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return table;
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}
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void DatabaseCatalog::initializeAndLoadTemporaryDatabase()
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{
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drop_delay_sec = getContext()->getConfigRef().getInt("database_atomic_delay_before_drop_table_sec", default_drop_delay_sec);
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unused_dir_hide_timeout_sec = getContext()->getConfigRef().getInt64("database_catalog_unused_dir_hide_timeout_sec", unused_dir_hide_timeout_sec);
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unused_dir_rm_timeout_sec = getContext()->getConfigRef().getInt64("database_catalog_unused_dir_rm_timeout_sec", unused_dir_rm_timeout_sec);
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unused_dir_cleanup_period_sec = getContext()->getConfigRef().getInt64("database_catalog_unused_dir_cleanup_period_sec", unused_dir_cleanup_period_sec);
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drop_error_cooldown_sec = getContext()->getConfigRef().getInt64("database_catalog_drop_error_cooldown_sec", drop_error_cooldown_sec);
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auto db_for_temporary_and_external_tables = std::make_shared<DatabaseMemory>(TEMPORARY_DATABASE, getContext());
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attachDatabase(TEMPORARY_DATABASE, db_for_temporary_and_external_tables);
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}
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void DatabaseCatalog::createBackgroundTasks()
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{
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/// It has to be done before databases are loaded (to avoid a race condition on initialization)
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if (Context::getGlobalContextInstance()->getApplicationType() == Context::ApplicationType::SERVER && unused_dir_cleanup_period_sec)
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{
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auto cleanup_task_holder
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= getContext()->getSchedulePool().createTask("DatabaseCatalog", [this]() { this->cleanupStoreDirectoryTask(); });
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cleanup_task = std::make_unique<BackgroundSchedulePoolTaskHolder>(std::move(cleanup_task_holder));
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}
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auto task_holder = getContext()->getSchedulePool().createTask("DatabaseCatalog", [this](){ this->dropTableDataTask(); });
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drop_task = std::make_unique<BackgroundSchedulePoolTaskHolder>(std::move(task_holder));
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}
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void DatabaseCatalog::startupBackgroundCleanup()
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{
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/// And it has to be done after all databases are loaded, otherwise cleanup_task may remove something that should not be removed
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if (cleanup_task)
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{
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(*cleanup_task)->activate();
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/// Do not start task immediately on server startup, it's not urgent.
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(*cleanup_task)->scheduleAfter(unused_dir_hide_timeout_sec * 1000);
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}
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(*drop_task)->activate();
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std::lock_guard lock{tables_marked_dropped_mutex};
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if (!tables_marked_dropped.empty())
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(*drop_task)->schedule();
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}
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void DatabaseCatalog::shutdownImpl()
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{
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if (cleanup_task)
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(*cleanup_task)->deactivate();
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if (drop_task)
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(*drop_task)->deactivate();
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/** At this point, some tables may have threads that block our mutex.
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* To shutdown them correctly, we will copy the current list of tables,
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* and ask them all to finish their work.
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* Then delete all objects with tables.
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*/
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Databases current_databases;
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{
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std::lock_guard lock(databases_mutex);
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current_databases = databases;
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}
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/// We still hold "databases" (instead of std::move) for Buffer tables to flush data correctly.
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for (auto & database : current_databases)
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database.second->shutdown();
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{
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std::lock_guard lock(tables_marked_dropped_mutex);
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tables_marked_dropped.clear();
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}
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std::lock_guard lock(databases_mutex);
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for (const auto & db : databases)
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{
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UUID db_uuid = db.second->getUUID();
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if (db_uuid != UUIDHelpers::Nil)
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removeUUIDMapping(db_uuid);
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}
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assert(std::find_if(uuid_map.begin(), uuid_map.end(), [](const auto & elem)
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{
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/// Ensure that all UUID mappings are empty (i.e. all mappings contain nullptr instead of a pointer to storage)
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const auto & not_empty_mapping = [] (const auto & mapping)
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{
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auto & db = mapping.second.first;
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auto & table = mapping.second.second;
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return db || table;
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};
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std::lock_guard map_lock{elem.mutex};
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auto it = std::find_if(elem.map.begin(), elem.map.end(), not_empty_mapping);
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return it != elem.map.end();
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}) == uuid_map.end());
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databases.clear();
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referential_dependencies.clear();
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loading_dependencies.clear();
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view_dependencies.clear();
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}
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bool DatabaseCatalog::isPredefinedDatabase(std::string_view database_name)
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{
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return database_name == TEMPORARY_DATABASE || database_name == SYSTEM_DATABASE || database_name == INFORMATION_SCHEMA
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|| database_name == INFORMATION_SCHEMA_UPPERCASE;
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}
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DatabaseAndTable DatabaseCatalog::tryGetByUUID(const UUID & uuid) const
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{
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assert(uuid != UUIDHelpers::Nil && getFirstLevelIdx(uuid) < uuid_map.size());
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const UUIDToStorageMapPart & map_part = uuid_map[getFirstLevelIdx(uuid)];
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std::lock_guard lock{map_part.mutex};
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auto it = map_part.map.find(uuid);
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if (it == map_part.map.end())
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return {};
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return it->second;
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}
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DatabaseAndTable DatabaseCatalog::getTableImpl(
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const StorageID & table_id,
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ContextPtr context_,
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std::optional<Exception> * exception) const
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{
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checkStackSize();
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if (!table_id)
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{
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if (exception)
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exception->emplace(ErrorCodes::UNKNOWN_TABLE, "Cannot find table: StorageID is empty");
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return {};
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}
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if (table_id.hasUUID())
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{
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/// Shortcut for tables which have persistent UUID
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auto db_and_table = tryGetByUUID(table_id.uuid);
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if (!db_and_table.first || !db_and_table.second)
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{
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assert(!db_and_table.first && !db_and_table.second);
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if (exception)
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exception->emplace(Exception(ErrorCodes::UNKNOWN_TABLE, "Table {} doesn't exist", table_id.getNameForLogs()));
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return {};
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}
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#if USE_LIBPQXX
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if (!context_->isInternalQuery() && (db_and_table.first->getEngineName() == "MaterializedPostgreSQL"))
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{
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db_and_table.second = std::make_shared<StorageMaterializedPostgreSQL>(std::move(db_and_table.second), getContext(),
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assert_cast<const DatabaseMaterializedPostgreSQL *>(db_and_table.first.get())->getPostgreSQLDatabaseName(),
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db_and_table.second->getStorageID().table_name);
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}
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#endif
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#if USE_MYSQL
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/// It's definitely not the best place for this logic, but behaviour must be consistent with DatabaseMaterializedMySQL::tryGetTable(...)
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if (!context_->isInternalQuery() && db_and_table.first->getEngineName() == "MaterializedMySQL")
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{
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db_and_table.second = std::make_shared<StorageMaterializedMySQL>(std::move(db_and_table.second), db_and_table.first.get());
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}
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#endif
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return db_and_table;
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}
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if (table_id.database_name == TEMPORARY_DATABASE)
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{
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/// For temporary tables UUIDs are set in Context::resolveStorageID(...).
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/// If table_id has no UUID, then the name of database was specified by user and table_id was not resolved through context.
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/// Do not allow access to TEMPORARY_DATABASE because it contains all temporary tables of all contexts and users.
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if (exception)
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exception->emplace(Exception(ErrorCodes::DATABASE_ACCESS_DENIED, "Direct access to `{}` database is not allowed", TEMPORARY_DATABASE));
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return {};
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}
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DatabasePtr database;
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{
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std::lock_guard lock{databases_mutex};
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auto it = databases.find(table_id.getDatabaseName());
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if (databases.end() == it)
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{
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if (exception)
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exception->emplace(Exception(ErrorCodes::UNKNOWN_DATABASE, "Database {} doesn't exist", backQuoteIfNeed(table_id.getDatabaseName())));
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return {};
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}
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database = it->second;
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}
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auto table = database->tryGetTable(table_id.table_name, context_);
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if (!table && exception)
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exception->emplace(Exception(ErrorCodes::UNKNOWN_TABLE, "Table {} doesn't exist", table_id.getNameForLogs()));
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if (!table)
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database = nullptr;
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return {database, table};
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}
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bool DatabaseCatalog::isPredefinedTable(const StorageID & table_id) const
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{
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static const char * information_schema_views[] = {"schemata", "tables", "views", "columns"};
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static const char * information_schema_views_uppercase[] = {"SCHEMATA", "TABLES", "VIEWS", "COLUMNS"};
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auto check_database_and_table_name = [&](const String & database_name, const String & table_name)
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{
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if (database_name == SYSTEM_DATABASE)
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{
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auto storage = getSystemDatabase()->tryGetTable(table_name, getContext());
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return storage && storage->isSystemStorage();
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}
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if (database_name == INFORMATION_SCHEMA)
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{
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return std::find(std::begin(information_schema_views), std::end(information_schema_views), table_name)
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!= std::end(information_schema_views);
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}
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if (database_name == INFORMATION_SCHEMA_UPPERCASE)
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{
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return std::find(std::begin(information_schema_views_uppercase), std::end(information_schema_views_uppercase), table_name)
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!= std::end(information_schema_views_uppercase);
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}
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return false;
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};
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if (table_id.hasUUID())
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{
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if (auto storage = tryGetByUUID(table_id.uuid).second)
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{
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if (storage->isSystemStorage())
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return true;
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auto res_id = storage->getStorageID();
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String database_name = res_id.getDatabaseName();
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if (database_name != SYSTEM_DATABASE) /// If (database_name == SYSTEM_DATABASE) then we have already checked it (see isSystemStorage() above).
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return check_database_and_table_name(database_name, res_id.getTableName());
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}
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return false;
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}
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return check_database_and_table_name(table_id.getDatabaseName(), table_id.getTableName());
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}
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void DatabaseCatalog::assertDatabaseExists(const String & database_name) const
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{
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std::lock_guard lock{databases_mutex};
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assertDatabaseExistsUnlocked(database_name);
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}
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void DatabaseCatalog::assertDatabaseDoesntExist(const String & database_name) const
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{
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std::lock_guard lock{databases_mutex};
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assertDatabaseDoesntExistUnlocked(database_name);
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}
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void DatabaseCatalog::assertDatabaseExistsUnlocked(const String & database_name) const
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{
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assert(!database_name.empty());
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if (databases.end() == databases.find(database_name))
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throw Exception(ErrorCodes::UNKNOWN_DATABASE, "Database {} doesn't exist", backQuoteIfNeed(database_name));
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}
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void DatabaseCatalog::assertDatabaseDoesntExistUnlocked(const String & database_name) const
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{
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assert(!database_name.empty());
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if (databases.end() != databases.find(database_name))
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throw Exception(ErrorCodes::DATABASE_ALREADY_EXISTS, "Database {} already exists.", backQuoteIfNeed(database_name));
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}
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void DatabaseCatalog::attachDatabase(const String & database_name, const DatabasePtr & database)
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{
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std::lock_guard lock{databases_mutex};
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assertDatabaseDoesntExistUnlocked(database_name);
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databases.emplace(database_name, database);
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NOEXCEPT_SCOPE({
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UUID db_uuid = database->getUUID();
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if (db_uuid != UUIDHelpers::Nil)
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addUUIDMapping(db_uuid, database, nullptr);
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});
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}
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DatabasePtr DatabaseCatalog::detachDatabase(ContextPtr local_context, const String & database_name, bool drop, bool check_empty)
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{
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if (database_name == TEMPORARY_DATABASE)
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throw Exception(ErrorCodes::DATABASE_ACCESS_DENIED, "Cannot detach database with temporary tables.");
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DatabasePtr db;
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{
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std::lock_guard lock{databases_mutex};
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assertDatabaseExistsUnlocked(database_name);
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db = databases.find(database_name)->second;
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UUID db_uuid = db->getUUID();
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if (db_uuid != UUIDHelpers::Nil)
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removeUUIDMapping(db_uuid);
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databases.erase(database_name);
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}
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if (check_empty)
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{
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try
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{
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if (!db->empty())
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throw Exception(ErrorCodes::DATABASE_NOT_EMPTY, "New table appeared in database being dropped or detached. Try again.");
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if (!drop)
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db->assertCanBeDetached(false);
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}
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catch (...)
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{
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attachDatabase(database_name, db);
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throw;
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}
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}
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db->shutdown();
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if (drop)
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{
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UUID db_uuid = db->getUUID();
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/// Delete the database.
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db->drop(local_context);
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/// Old ClickHouse versions did not store database.sql files
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/// Remove metadata dir (if exists) to avoid recreation of .sql file on server startup
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fs::path database_metadata_dir = fs::path(getContext()->getPath()) / "metadata" / escapeForFileName(database_name);
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fs::remove(database_metadata_dir);
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fs::path database_metadata_file = fs::path(getContext()->getPath()) / "metadata" / (escapeForFileName(database_name) + ".sql");
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fs::remove(database_metadata_file);
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if (db_uuid != UUIDHelpers::Nil)
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removeUUIDMappingFinally(db_uuid);
|
|
}
|
|
|
|
return db;
|
|
}
|
|
|
|
void DatabaseCatalog::updateDatabaseName(const String & old_name, const String & new_name, const Strings & tables_in_database)
|
|
{
|
|
std::lock_guard lock{databases_mutex};
|
|
assert(databases.find(new_name) == databases.end());
|
|
auto it = databases.find(old_name);
|
|
assert(it != databases.end());
|
|
auto db = it->second;
|
|
databases.erase(it);
|
|
databases.emplace(new_name, db);
|
|
|
|
/// Update dependencies.
|
|
for (const auto & table_name : tables_in_database)
|
|
{
|
|
auto removed_ref_deps = referential_dependencies.removeDependencies(StorageID{old_name, table_name}, /* remove_isolated_tables= */ true);
|
|
auto removed_loading_deps = loading_dependencies.removeDependencies(StorageID{old_name, table_name}, /* remove_isolated_tables= */ true);
|
|
referential_dependencies.addDependencies(StorageID{new_name, table_name}, removed_ref_deps);
|
|
loading_dependencies.addDependencies(StorageID{new_name, table_name}, removed_loading_deps);
|
|
}
|
|
}
|
|
|
|
DatabasePtr DatabaseCatalog::getDatabase(const String & database_name) const
|
|
{
|
|
std::lock_guard lock{databases_mutex};
|
|
assertDatabaseExistsUnlocked(database_name);
|
|
return databases.find(database_name)->second;
|
|
}
|
|
|
|
DatabasePtr DatabaseCatalog::tryGetDatabase(const String & database_name) const
|
|
{
|
|
assert(!database_name.empty());
|
|
std::lock_guard lock{databases_mutex};
|
|
auto it = databases.find(database_name);
|
|
if (it == databases.end())
|
|
return {};
|
|
return it->second;
|
|
}
|
|
|
|
DatabasePtr DatabaseCatalog::getDatabase(const UUID & uuid) const
|
|
{
|
|
auto db_and_table = tryGetByUUID(uuid);
|
|
if (!db_and_table.first || db_and_table.second)
|
|
throw Exception(ErrorCodes::UNKNOWN_DATABASE, "Database UUID {} does not exist", uuid);
|
|
return db_and_table.first;
|
|
}
|
|
|
|
DatabasePtr DatabaseCatalog::tryGetDatabase(const UUID & uuid) const
|
|
{
|
|
assert(uuid != UUIDHelpers::Nil);
|
|
auto db_and_table = tryGetByUUID(uuid);
|
|
if (!db_and_table.first || db_and_table.second)
|
|
return {};
|
|
return db_and_table.first;
|
|
}
|
|
|
|
bool DatabaseCatalog::isDatabaseExist(const String & database_name) const
|
|
{
|
|
assert(!database_name.empty());
|
|
std::lock_guard lock{databases_mutex};
|
|
return databases.end() != databases.find(database_name);
|
|
}
|
|
|
|
Databases DatabaseCatalog::getDatabases() const
|
|
{
|
|
std::lock_guard lock{databases_mutex};
|
|
return databases;
|
|
}
|
|
|
|
bool DatabaseCatalog::isTableExist(const DB::StorageID & table_id, ContextPtr context_) const
|
|
{
|
|
if (table_id.hasUUID())
|
|
return tryGetByUUID(table_id.uuid).second != nullptr;
|
|
|
|
DatabasePtr db;
|
|
{
|
|
std::lock_guard lock{databases_mutex};
|
|
auto iter = databases.find(table_id.database_name);
|
|
if (iter != databases.end())
|
|
db = iter->second;
|
|
}
|
|
return db && db->isTableExist(table_id.table_name, context_);
|
|
}
|
|
|
|
void DatabaseCatalog::assertTableDoesntExist(const StorageID & table_id, ContextPtr context_) const
|
|
{
|
|
if (isTableExist(table_id, context_))
|
|
throw Exception(ErrorCodes::TABLE_ALREADY_EXISTS, "Table {} already exists.", table_id);
|
|
}
|
|
|
|
DatabasePtr DatabaseCatalog::getDatabaseForTemporaryTables() const
|
|
{
|
|
return getDatabase(TEMPORARY_DATABASE);
|
|
}
|
|
|
|
DatabasePtr DatabaseCatalog::getSystemDatabase() const
|
|
{
|
|
return getDatabase(SYSTEM_DATABASE);
|
|
}
|
|
|
|
void DatabaseCatalog::addUUIDMapping(const UUID & uuid)
|
|
{
|
|
addUUIDMapping(uuid, nullptr, nullptr);
|
|
}
|
|
|
|
void DatabaseCatalog::addUUIDMapping(const UUID & uuid, const DatabasePtr & database, const StoragePtr & table)
|
|
{
|
|
assert(uuid != UUIDHelpers::Nil && getFirstLevelIdx(uuid) < uuid_map.size());
|
|
assert(database || !table);
|
|
UUIDToStorageMapPart & map_part = uuid_map[getFirstLevelIdx(uuid)];
|
|
std::lock_guard lock{map_part.mutex};
|
|
auto [it, inserted] = map_part.map.try_emplace(uuid, database, table);
|
|
if (inserted)
|
|
{
|
|
/// Mapping must be locked before actually inserting something
|
|
chassert((!database && !table));
|
|
return;
|
|
}
|
|
|
|
auto & prev_database = it->second.first;
|
|
auto & prev_table = it->second.second;
|
|
assert(prev_database || !prev_table);
|
|
|
|
if (!prev_database && database)
|
|
{
|
|
/// It's empty mapping, it was created to "lock" UUID and prevent collision. Just update it.
|
|
prev_database = database;
|
|
prev_table = table;
|
|
return;
|
|
}
|
|
|
|
/// We are trying to replace existing mapping (prev_database != nullptr), it's logical error
|
|
if (database || table)
|
|
throw Exception(ErrorCodes::LOGICAL_ERROR, "Mapping for table with UUID={} already exists", uuid);
|
|
/// Normally this should never happen, but it's possible when the same UUIDs are explicitly specified in different CREATE queries,
|
|
/// so it's not LOGICAL_ERROR
|
|
throw Exception(ErrorCodes::TABLE_ALREADY_EXISTS, "Mapping for table with UUID={} already exists. It happened due to UUID collision, "
|
|
"most likely because some not random UUIDs were manually specified in CREATE queries.", uuid);
|
|
}
|
|
|
|
void DatabaseCatalog::removeUUIDMapping(const UUID & uuid)
|
|
{
|
|
assert(uuid != UUIDHelpers::Nil && getFirstLevelIdx(uuid) < uuid_map.size());
|
|
UUIDToStorageMapPart & map_part = uuid_map[getFirstLevelIdx(uuid)];
|
|
std::lock_guard lock{map_part.mutex};
|
|
auto it = map_part.map.find(uuid);
|
|
if (it == map_part.map.end())
|
|
throw Exception(ErrorCodes::LOGICAL_ERROR, "Mapping for table with UUID={} doesn't exist", uuid);
|
|
it->second = {};
|
|
}
|
|
|
|
void DatabaseCatalog::removeUUIDMappingFinally(const UUID & uuid)
|
|
{
|
|
assert(uuid != UUIDHelpers::Nil && getFirstLevelIdx(uuid) < uuid_map.size());
|
|
UUIDToStorageMapPart & map_part = uuid_map[getFirstLevelIdx(uuid)];
|
|
std::lock_guard lock{map_part.mutex};
|
|
if (!map_part.map.erase(uuid))
|
|
throw Exception(ErrorCodes::LOGICAL_ERROR, "Mapping for table with UUID={} doesn't exist", uuid);
|
|
}
|
|
|
|
void DatabaseCatalog::updateUUIDMapping(const UUID & uuid, DatabasePtr database, StoragePtr table)
|
|
{
|
|
assert(uuid != UUIDHelpers::Nil && getFirstLevelIdx(uuid) < uuid_map.size());
|
|
assert(database && table);
|
|
UUIDToStorageMapPart & map_part = uuid_map[getFirstLevelIdx(uuid)];
|
|
std::lock_guard lock{map_part.mutex};
|
|
auto it = map_part.map.find(uuid);
|
|
if (it == map_part.map.end())
|
|
throw Exception(ErrorCodes::LOGICAL_ERROR, "Mapping for table with UUID={} doesn't exist", uuid);
|
|
auto & prev_database = it->second.first;
|
|
auto & prev_table = it->second.second;
|
|
assert(prev_database && prev_table);
|
|
prev_database = std::move(database);
|
|
prev_table = std::move(table);
|
|
}
|
|
|
|
bool DatabaseCatalog::hasUUIDMapping(const UUID & uuid)
|
|
{
|
|
assert(uuid != UUIDHelpers::Nil && getFirstLevelIdx(uuid) < uuid_map.size());
|
|
UUIDToStorageMapPart & map_part = uuid_map[getFirstLevelIdx(uuid)];
|
|
std::lock_guard lock{map_part.mutex};
|
|
return map_part.map.contains(uuid);
|
|
}
|
|
|
|
std::unique_ptr<DatabaseCatalog> DatabaseCatalog::database_catalog;
|
|
|
|
DatabaseCatalog::DatabaseCatalog(ContextMutablePtr global_context_)
|
|
: WithMutableContext(global_context_)
|
|
, referential_dependencies{"ReferentialDeps"}
|
|
, loading_dependencies{"LoadingDeps"}
|
|
, view_dependencies{"ViewDeps"}
|
|
, log(&Poco::Logger::get("DatabaseCatalog"))
|
|
{
|
|
}
|
|
|
|
DatabaseCatalog & DatabaseCatalog::init(ContextMutablePtr global_context_)
|
|
{
|
|
if (database_catalog)
|
|
{
|
|
throw Exception(ErrorCodes::LOGICAL_ERROR, "Database catalog is initialized twice. This is a bug.");
|
|
}
|
|
|
|
database_catalog.reset(new DatabaseCatalog(global_context_));
|
|
|
|
return *database_catalog;
|
|
}
|
|
|
|
DatabaseCatalog & DatabaseCatalog::instance()
|
|
{
|
|
if (!database_catalog)
|
|
{
|
|
throw Exception(ErrorCodes::LOGICAL_ERROR, "Database catalog is not initialized. This is a bug.");
|
|
}
|
|
|
|
return *database_catalog;
|
|
}
|
|
|
|
void DatabaseCatalog::shutdown()
|
|
{
|
|
// The catalog might not be initialized yet by init(global_context). It can
|
|
// happen if some exception was thrown on first steps of startup.
|
|
if (database_catalog)
|
|
{
|
|
database_catalog->shutdownImpl();
|
|
}
|
|
}
|
|
|
|
DatabasePtr DatabaseCatalog::getDatabase(const String & database_name, ContextPtr local_context) const
|
|
{
|
|
String resolved_database = local_context->resolveDatabase(database_name);
|
|
return getDatabase(resolved_database);
|
|
}
|
|
|
|
void DatabaseCatalog::addViewDependency(const StorageID & source_table_id, const StorageID & view_id)
|
|
{
|
|
std::lock_guard lock{databases_mutex};
|
|
view_dependencies.addDependency(source_table_id, view_id);
|
|
|
|
}
|
|
|
|
void DatabaseCatalog::removeViewDependency(const StorageID & source_table_id, const StorageID & view_id)
|
|
{
|
|
std::lock_guard lock{databases_mutex};
|
|
view_dependencies.removeDependency(source_table_id, view_id, /* remove_isolated_tables= */ true);
|
|
}
|
|
|
|
std::vector<StorageID> DatabaseCatalog::getDependentViews(const StorageID & source_table_id) const
|
|
{
|
|
std::lock_guard lock{databases_mutex};
|
|
return view_dependencies.getDependencies(source_table_id);
|
|
}
|
|
|
|
void DatabaseCatalog::updateViewDependency(const StorageID & old_source_table_id, const StorageID & old_view_id,
|
|
const StorageID & new_source_table_id, const StorageID & new_view_id)
|
|
{
|
|
std::lock_guard lock{databases_mutex};
|
|
if (!old_source_table_id.empty())
|
|
view_dependencies.removeDependency(old_source_table_id, old_view_id, /* remove_isolated_tables= */ true);
|
|
if (!new_source_table_id.empty())
|
|
view_dependencies.addDependency(new_source_table_id, new_view_id);
|
|
}
|
|
|
|
DDLGuardPtr DatabaseCatalog::getDDLGuard(const String & database, const String & table)
|
|
{
|
|
std::unique_lock lock(ddl_guards_mutex);
|
|
/// TSA does not support unique_lock
|
|
auto db_guard_iter = TSA_SUPPRESS_WARNING_FOR_WRITE(ddl_guards).try_emplace(database).first;
|
|
DatabaseGuard & db_guard = db_guard_iter->second;
|
|
return std::make_unique<DDLGuard>(db_guard.first, db_guard.second, std::move(lock), table, database);
|
|
}
|
|
|
|
std::unique_lock<SharedMutex> DatabaseCatalog::getExclusiveDDLGuardForDatabase(const String & database)
|
|
{
|
|
DDLGuards::iterator db_guard_iter;
|
|
{
|
|
std::lock_guard lock(ddl_guards_mutex);
|
|
db_guard_iter = ddl_guards.try_emplace(database).first;
|
|
assert(db_guard_iter->second.first.contains(""));
|
|
}
|
|
DatabaseGuard & db_guard = db_guard_iter->second;
|
|
return std::unique_lock{db_guard.second};
|
|
}
|
|
|
|
bool DatabaseCatalog::isDictionaryExist(const StorageID & table_id) const
|
|
{
|
|
auto storage = tryGetTable(table_id, getContext());
|
|
bool storage_is_dictionary = storage && storage->isDictionary();
|
|
|
|
return storage_is_dictionary;
|
|
}
|
|
|
|
StoragePtr DatabaseCatalog::getTable(const StorageID & table_id, ContextPtr local_context) const
|
|
{
|
|
std::optional<Exception> exc;
|
|
auto res = getTableImpl(table_id, local_context, &exc);
|
|
if (!res.second)
|
|
throw Exception(*exc);
|
|
return res.second;
|
|
}
|
|
|
|
StoragePtr DatabaseCatalog::tryGetTable(const StorageID & table_id, ContextPtr local_context) const
|
|
{
|
|
return getTableImpl(table_id, local_context, nullptr).second;
|
|
}
|
|
|
|
DatabaseAndTable DatabaseCatalog::getDatabaseAndTable(const StorageID & table_id, ContextPtr local_context) const
|
|
{
|
|
std::optional<Exception> exc;
|
|
auto res = getTableImpl(table_id, local_context, &exc);
|
|
if (!res.second)
|
|
throw Exception(*exc);
|
|
return res;
|
|
}
|
|
|
|
DatabaseAndTable DatabaseCatalog::tryGetDatabaseAndTable(const StorageID & table_id, ContextPtr local_context) const
|
|
{
|
|
return getTableImpl(table_id, local_context, nullptr);
|
|
}
|
|
|
|
void DatabaseCatalog::loadMarkedAsDroppedTables()
|
|
{
|
|
assert(!cleanup_task);
|
|
|
|
/// /clickhouse_root/metadata_dropped/ contains files with metadata of tables,
|
|
/// which where marked as dropped by Atomic databases.
|
|
/// Data directories of such tables still exists in store/
|
|
/// and metadata still exists in ZooKeeper for ReplicatedMergeTree tables.
|
|
/// If server restarts before such tables was completely dropped,
|
|
/// we should load them and enqueue cleanup to remove data from store/ and metadata from ZooKeeper
|
|
|
|
std::map<String, StorageID> dropped_metadata;
|
|
String path = getContext()->getPath() + "metadata_dropped/";
|
|
|
|
if (!std::filesystem::exists(path))
|
|
{
|
|
return;
|
|
}
|
|
|
|
Poco::DirectoryIterator dir_end;
|
|
for (Poco::DirectoryIterator it(path); it != dir_end; ++it)
|
|
{
|
|
/// File name has the following format:
|
|
/// database_name.table_name.uuid.sql
|
|
|
|
/// Ignore unexpected files
|
|
if (!it.name().ends_with(".sql"))
|
|
continue;
|
|
|
|
/// Process .sql files with metadata of tables which were marked as dropped
|
|
StorageID dropped_id = StorageID::createEmpty();
|
|
size_t dot_pos = it.name().find('.');
|
|
if (dot_pos == std::string::npos)
|
|
continue;
|
|
dropped_id.database_name = unescapeForFileName(it.name().substr(0, dot_pos));
|
|
|
|
size_t prev_dot_pos = dot_pos;
|
|
dot_pos = it.name().find('.', prev_dot_pos + 1);
|
|
if (dot_pos == std::string::npos)
|
|
continue;
|
|
dropped_id.table_name = unescapeForFileName(it.name().substr(prev_dot_pos + 1, dot_pos - prev_dot_pos - 1));
|
|
|
|
prev_dot_pos = dot_pos;
|
|
dot_pos = it.name().find('.', prev_dot_pos + 1);
|
|
if (dot_pos == std::string::npos)
|
|
continue;
|
|
dropped_id.uuid = parse<UUID>(it.name().substr(prev_dot_pos + 1, dot_pos - prev_dot_pos - 1));
|
|
|
|
String full_path = path + it.name();
|
|
dropped_metadata.emplace(std::move(full_path), std::move(dropped_id));
|
|
}
|
|
|
|
LOG_INFO(log, "Found {} partially dropped tables. Will load them and retry removal.", dropped_metadata.size());
|
|
|
|
ThreadPool pool;
|
|
for (const auto & elem : dropped_metadata)
|
|
{
|
|
pool.scheduleOrThrowOnError([&]()
|
|
{
|
|
this->enqueueDroppedTableCleanup(elem.second, nullptr, elem.first);
|
|
});
|
|
}
|
|
pool.wait();
|
|
}
|
|
|
|
String DatabaseCatalog::getPathForDroppedMetadata(const StorageID & table_id) const
|
|
{
|
|
return getContext()->getPath() + "metadata_dropped/" +
|
|
escapeForFileName(table_id.getDatabaseName()) + "." +
|
|
escapeForFileName(table_id.getTableName()) + "." +
|
|
toString(table_id.uuid) + ".sql";
|
|
}
|
|
|
|
void DatabaseCatalog::enqueueDroppedTableCleanup(StorageID table_id, StoragePtr table, String dropped_metadata_path, bool ignore_delay)
|
|
{
|
|
assert(table_id.hasUUID());
|
|
assert(!table || table->getStorageID().uuid == table_id.uuid);
|
|
assert(dropped_metadata_path == getPathForDroppedMetadata(table_id));
|
|
|
|
/// Table was removed from database. Enqueue removal of its data from disk.
|
|
time_t drop_time;
|
|
if (table)
|
|
{
|
|
chassert(hasUUIDMapping(table_id.uuid));
|
|
drop_time = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
|
|
/// Do not postpone removal of in-memory tables
|
|
ignore_delay = ignore_delay || !table->storesDataOnDisk();
|
|
table->is_dropped = true;
|
|
}
|
|
else
|
|
{
|
|
/// Try load table from metadata to drop it correctly (e.g. remove metadata from zk or remove data from all volumes)
|
|
LOG_INFO(log, "Trying load partially dropped table {} from {}", table_id.getNameForLogs(), dropped_metadata_path);
|
|
ASTPtr ast = DatabaseOnDisk::parseQueryFromMetadata(
|
|
log, getContext(), dropped_metadata_path, /*throw_on_error*/ false, /*remove_empty*/ false);
|
|
auto * create = typeid_cast<ASTCreateQuery *>(ast.get());
|
|
assert(!create || create->uuid == table_id.uuid);
|
|
|
|
if (create)
|
|
{
|
|
String data_path = "store/" + getPathForUUID(table_id.uuid);
|
|
create->setDatabase(table_id.database_name);
|
|
create->setTable(table_id.table_name);
|
|
try
|
|
{
|
|
table = createTableFromAST(*create, table_id.getDatabaseName(), data_path, getContext(), /* force_restore */ true).second;
|
|
table->is_dropped = true;
|
|
}
|
|
catch (...)
|
|
{
|
|
tryLogCurrentException(log, "Cannot load partially dropped table " + table_id.getNameForLogs() +
|
|
" from: " + dropped_metadata_path +
|
|
". Parsed query: " + serializeAST(*create) +
|
|
". Will remove metadata and " + data_path +
|
|
". Garbage may be left in ZooKeeper.");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
LOG_WARNING(log, "Cannot parse metadata of partially dropped table {} from {}. Will remove metadata file and data directory. Garbage may be left in /store directory and ZooKeeper.", table_id.getNameForLogs(), dropped_metadata_path);
|
|
}
|
|
|
|
addUUIDMapping(table_id.uuid);
|
|
drop_time = FS::getModificationTime(dropped_metadata_path);
|
|
}
|
|
|
|
std::lock_guard lock(tables_marked_dropped_mutex);
|
|
if (ignore_delay)
|
|
tables_marked_dropped.push_front({table_id, table, dropped_metadata_path, drop_time});
|
|
else
|
|
tables_marked_dropped.push_back({table_id, table, dropped_metadata_path, drop_time + drop_delay_sec});
|
|
tables_marked_dropped_ids.insert(table_id.uuid);
|
|
CurrentMetrics::add(CurrentMetrics::TablesToDropQueueSize, 1);
|
|
|
|
/// If list of dropped tables was empty, start a drop task.
|
|
/// If ignore_delay is set, schedule drop task as soon as possible.
|
|
if (drop_task && (tables_marked_dropped.size() == 1 || ignore_delay))
|
|
(*drop_task)->schedule();
|
|
}
|
|
|
|
void DatabaseCatalog::dropTableDataTask()
|
|
{
|
|
/// Background task that removes data of tables which were marked as dropped by Atomic databases.
|
|
/// Table can be removed when it's not used by queries and drop_delay_sec elapsed since it was marked as dropped.
|
|
|
|
bool need_reschedule = true;
|
|
/// Default reschedule time for the case when we are waiting for reference count to become 1.
|
|
size_t schedule_after_ms = reschedule_time_ms;
|
|
TableMarkedAsDropped table;
|
|
try
|
|
{
|
|
std::lock_guard lock(tables_marked_dropped_mutex);
|
|
assert(!tables_marked_dropped.empty());
|
|
time_t current_time = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
|
|
time_t min_drop_time = std::numeric_limits<time_t>::max();
|
|
size_t tables_in_use_count = 0;
|
|
auto it = std::find_if(tables_marked_dropped.begin(), tables_marked_dropped.end(), [&](const auto & elem)
|
|
{
|
|
bool not_in_use = !elem.table || elem.table.unique();
|
|
bool old_enough = elem.drop_time <= current_time;
|
|
min_drop_time = std::min(min_drop_time, elem.drop_time);
|
|
tables_in_use_count += !not_in_use;
|
|
return not_in_use && old_enough;
|
|
});
|
|
if (it != tables_marked_dropped.end())
|
|
{
|
|
table = std::move(*it);
|
|
LOG_INFO(log, "Have {} tables in drop queue ({} of them are in use), will try drop {}",
|
|
tables_marked_dropped.size(), tables_in_use_count, table.table_id.getNameForLogs());
|
|
tables_marked_dropped.erase(it);
|
|
/// Schedule the task as soon as possible, while there are suitable tables to drop.
|
|
schedule_after_ms = 0;
|
|
}
|
|
else if (current_time < min_drop_time)
|
|
{
|
|
/// We are waiting for drop_delay_sec to exceed, no sense to wakeup until min_drop_time.
|
|
/// If new table is added to the queue with ignore_delay flag, schedule() is called to wakeup the task earlier.
|
|
schedule_after_ms = (min_drop_time - current_time) * 1000;
|
|
LOG_TRACE(log, "Not found any suitable tables to drop, still have {} tables in drop queue ({} of them are in use). "
|
|
"Will check again after {} seconds", tables_marked_dropped.size(), tables_in_use_count, min_drop_time - current_time);
|
|
}
|
|
need_reschedule = !tables_marked_dropped.empty();
|
|
}
|
|
catch (...)
|
|
{
|
|
tryLogCurrentException(log, __PRETTY_FUNCTION__);
|
|
}
|
|
|
|
if (table.table_id)
|
|
{
|
|
try
|
|
{
|
|
dropTableFinally(table);
|
|
std::lock_guard lock(tables_marked_dropped_mutex);
|
|
[[maybe_unused]] auto removed = tables_marked_dropped_ids.erase(table.table_id.uuid);
|
|
assert(removed);
|
|
}
|
|
catch (...)
|
|
{
|
|
tryLogCurrentException(log, "Cannot drop table " + table.table_id.getNameForLogs() +
|
|
". Will retry later.");
|
|
{
|
|
table.drop_time = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now()) + drop_error_cooldown_sec;
|
|
std::lock_guard lock(tables_marked_dropped_mutex);
|
|
tables_marked_dropped.emplace_back(std::move(table));
|
|
/// If list of dropped tables was empty, schedule a task to retry deletion.
|
|
if (tables_marked_dropped.size() == 1)
|
|
{
|
|
need_reschedule = true;
|
|
schedule_after_ms = drop_error_cooldown_sec * 1000;
|
|
}
|
|
}
|
|
}
|
|
|
|
wait_table_finally_dropped.notify_all();
|
|
}
|
|
|
|
/// Do not schedule a task if there is no tables to drop
|
|
if (need_reschedule)
|
|
(*drop_task)->scheduleAfter(schedule_after_ms);
|
|
}
|
|
|
|
void DatabaseCatalog::dropTableFinally(const TableMarkedAsDropped & table)
|
|
{
|
|
if (table.table)
|
|
{
|
|
table.table->drop();
|
|
}
|
|
|
|
/// Even if table is not loaded, try remove its data from disks.
|
|
for (const auto & [disk_name, disk] : getContext()->getDisksMap())
|
|
{
|
|
String data_path = "store/" + getPathForUUID(table.table_id.uuid);
|
|
if (disk->isReadOnly() || !disk->exists(data_path))
|
|
continue;
|
|
|
|
LOG_INFO(log, "Removing data directory {} of dropped table {} from disk {}", data_path, table.table_id.getNameForLogs(), disk_name);
|
|
disk->removeRecursive(data_path);
|
|
}
|
|
|
|
LOG_INFO(log, "Removing metadata {} of dropped table {}", table.metadata_path, table.table_id.getNameForLogs());
|
|
fs::remove(fs::path(table.metadata_path));
|
|
|
|
removeUUIDMappingFinally(table.table_id.uuid);
|
|
CurrentMetrics::sub(CurrentMetrics::TablesToDropQueueSize, 1);
|
|
}
|
|
|
|
String DatabaseCatalog::getPathForUUID(const UUID & uuid)
|
|
{
|
|
const size_t uuid_prefix_len = 3;
|
|
return toString(uuid).substr(0, uuid_prefix_len) + '/' + toString(uuid) + '/';
|
|
}
|
|
|
|
void DatabaseCatalog::waitTableFinallyDropped(const UUID & uuid)
|
|
{
|
|
if (uuid == UUIDHelpers::Nil)
|
|
return;
|
|
|
|
LOG_DEBUG(log, "Waiting for table {} to be finally dropped", toString(uuid));
|
|
std::unique_lock lock{tables_marked_dropped_mutex};
|
|
wait_table_finally_dropped.wait(lock, [&]() TSA_REQUIRES(tables_marked_dropped_mutex) -> bool
|
|
{
|
|
return !tables_marked_dropped_ids.contains(uuid);
|
|
});
|
|
}
|
|
|
|
void DatabaseCatalog::addDependencies(
|
|
const StorageID & table_id,
|
|
const std::vector<StorageID> & new_referential_dependencies,
|
|
const std::vector<StorageID> & new_loading_dependencies)
|
|
{
|
|
if (new_referential_dependencies.empty() && new_loading_dependencies.empty())
|
|
return;
|
|
std::lock_guard lock{databases_mutex};
|
|
if (!new_referential_dependencies.empty())
|
|
referential_dependencies.addDependencies(table_id, new_referential_dependencies);
|
|
if (!new_loading_dependencies.empty())
|
|
loading_dependencies.addDependencies(table_id, new_loading_dependencies);
|
|
}
|
|
|
|
void DatabaseCatalog::addDependencies(
|
|
const QualifiedTableName & table_name,
|
|
const TableNamesSet & new_referential_dependencies,
|
|
const TableNamesSet & new_loading_dependencies)
|
|
{
|
|
if (new_referential_dependencies.empty() && new_loading_dependencies.empty())
|
|
return;
|
|
std::lock_guard lock{databases_mutex};
|
|
if (!new_referential_dependencies.empty())
|
|
referential_dependencies.addDependencies(table_name, new_referential_dependencies);
|
|
if (!new_loading_dependencies.empty())
|
|
loading_dependencies.addDependencies(table_name, new_loading_dependencies);
|
|
}
|
|
|
|
void DatabaseCatalog::addDependencies(
|
|
const TablesDependencyGraph & new_referential_dependencies, const TablesDependencyGraph & new_loading_dependencies)
|
|
{
|
|
std::lock_guard lock{databases_mutex};
|
|
referential_dependencies.mergeWith(new_referential_dependencies);
|
|
loading_dependencies.mergeWith(new_loading_dependencies);
|
|
}
|
|
|
|
std::vector<StorageID> DatabaseCatalog::getReferentialDependencies(const StorageID & table_id) const
|
|
{
|
|
std::lock_guard lock{databases_mutex};
|
|
return referential_dependencies.getDependencies(table_id);
|
|
}
|
|
|
|
std::vector<StorageID> DatabaseCatalog::getReferentialDependents(const StorageID & table_id) const
|
|
{
|
|
std::lock_guard lock{databases_mutex};
|
|
return referential_dependencies.getDependents(table_id);
|
|
}
|
|
|
|
std::vector<StorageID> DatabaseCatalog::getLoadingDependencies(const StorageID & table_id) const
|
|
{
|
|
std::lock_guard lock{databases_mutex};
|
|
return loading_dependencies.getDependencies(table_id);
|
|
}
|
|
|
|
std::vector<StorageID> DatabaseCatalog::getLoadingDependents(const StorageID & table_id) const
|
|
{
|
|
std::lock_guard lock{databases_mutex};
|
|
return loading_dependencies.getDependents(table_id);
|
|
}
|
|
|
|
std::pair<std::vector<StorageID>, std::vector<StorageID>> DatabaseCatalog::removeDependencies(
|
|
const StorageID & table_id, bool check_referential_dependencies, bool check_loading_dependencies, bool is_drop_database)
|
|
{
|
|
std::lock_guard lock{databases_mutex};
|
|
checkTableCanBeRemovedOrRenamedUnlocked(table_id, check_referential_dependencies, check_loading_dependencies, is_drop_database);
|
|
return {referential_dependencies.removeDependencies(table_id, /* remove_isolated_tables= */ true),
|
|
loading_dependencies.removeDependencies(table_id, /* remove_isolated_tables= */ true)};
|
|
}
|
|
|
|
void DatabaseCatalog::updateDependencies(
|
|
const StorageID & table_id, const TableNamesSet & new_referential_dependencies, const TableNamesSet & new_loading_dependencies)
|
|
{
|
|
std::lock_guard lock{databases_mutex};
|
|
referential_dependencies.removeDependencies(table_id, /* remove_isolated_tables= */ true);
|
|
loading_dependencies.removeDependencies(table_id, /* remove_isolated_tables= */ true);
|
|
if (!new_referential_dependencies.empty())
|
|
referential_dependencies.addDependencies(table_id, new_referential_dependencies);
|
|
if (!new_loading_dependencies.empty())
|
|
loading_dependencies.addDependencies(table_id, new_loading_dependencies);
|
|
}
|
|
|
|
void DatabaseCatalog::checkTableCanBeRemovedOrRenamed(
|
|
const StorageID & table_id, bool check_referential_dependencies, bool check_loading_dependencies, bool is_drop_database) const
|
|
{
|
|
if (!check_referential_dependencies && !check_loading_dependencies)
|
|
return;
|
|
std::lock_guard lock{databases_mutex};
|
|
return checkTableCanBeRemovedOrRenamedUnlocked(table_id, check_referential_dependencies, check_loading_dependencies, is_drop_database);
|
|
}
|
|
|
|
void DatabaseCatalog::checkTableCanBeRemovedOrRenamedUnlocked(
|
|
const StorageID & removing_table, bool check_referential_dependencies, bool check_loading_dependencies, bool is_drop_database) const
|
|
{
|
|
chassert(!check_referential_dependencies || !check_loading_dependencies); /// These flags must not be both set.
|
|
std::vector<StorageID> dependents;
|
|
if (check_referential_dependencies)
|
|
dependents = referential_dependencies.getDependents(removing_table);
|
|
else if (check_loading_dependencies)
|
|
dependents = loading_dependencies.getDependents(removing_table);
|
|
else
|
|
return;
|
|
|
|
if (!is_drop_database)
|
|
{
|
|
if (!dependents.empty())
|
|
throw Exception(ErrorCodes::HAVE_DEPENDENT_OBJECTS, "Cannot drop or rename {}, because some tables depend on it: {}",
|
|
removing_table, fmt::join(dependents, ", "));
|
|
return;
|
|
}
|
|
|
|
/// For DROP DATABASE we should ignore dependent tables from the same database.
|
|
/// TODO unload tables in reverse topological order and remove this code
|
|
std::vector<StorageID> from_other_databases;
|
|
for (const auto & dependent : dependents)
|
|
if (dependent.database_name != removing_table.database_name)
|
|
from_other_databases.push_back(dependent);
|
|
|
|
if (!from_other_databases.empty())
|
|
throw Exception(ErrorCodes::HAVE_DEPENDENT_OBJECTS, "Cannot drop or rename {}, because some tables depend on it: {}",
|
|
removing_table, fmt::join(from_other_databases, ", "));
|
|
}
|
|
|
|
void DatabaseCatalog::cleanupStoreDirectoryTask()
|
|
{
|
|
for (const auto & [disk_name, disk] : getContext()->getDisksMap())
|
|
{
|
|
if (!disk->supportsStat() || !disk->supportsChmod())
|
|
continue;
|
|
|
|
size_t affected_dirs = 0;
|
|
size_t checked_dirs = 0;
|
|
for (auto it = disk->iterateDirectory("store"); it->isValid(); it->next())
|
|
{
|
|
String prefix = it->name();
|
|
bool expected_prefix_dir = disk->isDirectory(it->path()) && prefix.size() == 3 && isHexDigit(prefix[0]) && isHexDigit(prefix[1])
|
|
&& isHexDigit(prefix[2]);
|
|
|
|
if (!expected_prefix_dir)
|
|
{
|
|
LOG_WARNING(log, "Found invalid directory {} on disk {}, will try to remove it", it->path(), disk_name);
|
|
checked_dirs += 1;
|
|
affected_dirs += maybeRemoveDirectory(disk_name, disk, it->path());
|
|
continue;
|
|
}
|
|
|
|
for (auto jt = disk->iterateDirectory(it->path()); jt->isValid(); jt->next())
|
|
{
|
|
String uuid_str = jt->name();
|
|
UUID uuid;
|
|
bool parsed = tryParse(uuid, uuid_str);
|
|
|
|
bool expected_dir = disk->isDirectory(jt->path()) && parsed && uuid != UUIDHelpers::Nil && uuid_str.starts_with(prefix);
|
|
|
|
if (!expected_dir)
|
|
{
|
|
LOG_WARNING(log, "Found invalid directory {} on disk {}, will try to remove it", jt->path(), disk_name);
|
|
checked_dirs += 1;
|
|
affected_dirs += maybeRemoveDirectory(disk_name, disk, jt->path());
|
|
continue;
|
|
}
|
|
|
|
/// Order is important
|
|
if (!hasUUIDMapping(uuid))
|
|
{
|
|
/// We load uuids even for detached and permanently detached tables,
|
|
/// so it looks safe enough to remove directory if we don't have uuid mapping for it.
|
|
/// No table or database using this directory should concurrently appear,
|
|
/// because creation of new table would fail with "directory already exists".
|
|
checked_dirs += 1;
|
|
affected_dirs += maybeRemoveDirectory(disk_name, disk, jt->path());
|
|
}
|
|
}
|
|
}
|
|
|
|
if (affected_dirs)
|
|
LOG_INFO(log, "Cleaned up {} directories from store/ on disk {}", affected_dirs, disk_name);
|
|
if (checked_dirs == 0)
|
|
LOG_TEST(log, "Nothing to clean up from store/ on disk {}", disk_name);
|
|
}
|
|
|
|
(*cleanup_task)->scheduleAfter(unused_dir_cleanup_period_sec * 1000);
|
|
}
|
|
|
|
bool DatabaseCatalog::maybeRemoveDirectory(const String & disk_name, const DiskPtr & disk, const String & unused_dir)
|
|
{
|
|
/// "Safe" automatic removal of some directory.
|
|
/// At first we do not remove anything and only revoke all access right.
|
|
/// And remove only if nobody noticed it after, for example, one month.
|
|
|
|
try
|
|
{
|
|
struct stat st = disk->stat(unused_dir);
|
|
|
|
if (st.st_uid != geteuid())
|
|
{
|
|
/// Directory is not owned by clickhouse, it's weird, let's ignore it (chmod will likely fail anyway).
|
|
LOG_WARNING(log, "Found directory {} with unexpected owner (uid={}) on disk {}", unused_dir, st.st_uid, disk_name);
|
|
return false;
|
|
}
|
|
|
|
time_t max_modification_time = std::max(st.st_atime, std::max(st.st_mtime, st.st_ctime));
|
|
time_t current_time = time(nullptr);
|
|
if (st.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO))
|
|
{
|
|
if (current_time <= max_modification_time + unused_dir_hide_timeout_sec)
|
|
return false;
|
|
|
|
LOG_INFO(log, "Removing access rights for unused directory {} from disk {} (will remove it when timeout exceed)", unused_dir, disk_name);
|
|
|
|
/// Explicitly update modification time just in case
|
|
|
|
disk->setLastModified(unused_dir, Poco::Timestamp::fromEpochTime(current_time));
|
|
|
|
/// Remove all access right
|
|
disk->chmod(unused_dir, 0);
|
|
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
if (!unused_dir_rm_timeout_sec)
|
|
return false;
|
|
|
|
if (current_time <= max_modification_time + unused_dir_rm_timeout_sec)
|
|
return false;
|
|
|
|
LOG_INFO(log, "Removing unused directory {} from disk {}", unused_dir, disk_name);
|
|
|
|
/// We have to set these access rights to make recursive removal work
|
|
disk->chmod(unused_dir, S_IRWXU);
|
|
|
|
disk->removeRecursive(unused_dir);
|
|
|
|
return true;
|
|
}
|
|
}
|
|
catch (...)
|
|
{
|
|
tryLogCurrentException(log, fmt::format("Failed to remove unused directory {} from disk {} ({})",
|
|
unused_dir, disk->getName(), disk->getPath()));
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static void maybeUnlockUUID(UUID uuid)
|
|
{
|
|
if (uuid == UUIDHelpers::Nil)
|
|
return;
|
|
|
|
chassert(DatabaseCatalog::instance().hasUUIDMapping(uuid));
|
|
auto db_and_table = DatabaseCatalog::instance().tryGetByUUID(uuid);
|
|
if (!db_and_table.first && !db_and_table.second)
|
|
{
|
|
DatabaseCatalog::instance().removeUUIDMappingFinally(uuid);
|
|
return;
|
|
}
|
|
chassert(db_and_table.first || !db_and_table.second);
|
|
}
|
|
|
|
TemporaryLockForUUIDDirectory::TemporaryLockForUUIDDirectory(UUID uuid_)
|
|
: uuid(uuid_)
|
|
{
|
|
if (uuid != UUIDHelpers::Nil)
|
|
DatabaseCatalog::instance().addUUIDMapping(uuid);
|
|
}
|
|
|
|
TemporaryLockForUUIDDirectory::~TemporaryLockForUUIDDirectory()
|
|
{
|
|
maybeUnlockUUID(uuid);
|
|
}
|
|
|
|
TemporaryLockForUUIDDirectory::TemporaryLockForUUIDDirectory(TemporaryLockForUUIDDirectory && rhs) noexcept
|
|
: uuid(rhs.uuid)
|
|
{
|
|
rhs.uuid = UUIDHelpers::Nil;
|
|
}
|
|
|
|
TemporaryLockForUUIDDirectory & TemporaryLockForUUIDDirectory::operator = (TemporaryLockForUUIDDirectory && rhs) noexcept
|
|
{
|
|
maybeUnlockUUID(uuid);
|
|
uuid = rhs.uuid;
|
|
rhs.uuid = UUIDHelpers::Nil;
|
|
return *this;
|
|
}
|
|
|
|
|
|
DDLGuard::DDLGuard(Map & map_, SharedMutex & db_mutex_, std::unique_lock<std::mutex> guards_lock_, const String & elem, const String & database_name)
|
|
: map(map_), db_mutex(db_mutex_), guards_lock(std::move(guards_lock_))
|
|
{
|
|
it = map.emplace(elem, Entry{std::make_unique<std::mutex>(), 0}).first;
|
|
++it->second.counter;
|
|
guards_lock.unlock();
|
|
table_lock = std::unique_lock(*it->second.mutex);
|
|
is_database_guard = elem.empty();
|
|
if (!is_database_guard)
|
|
{
|
|
|
|
bool locked_database_for_read = db_mutex.try_lock_shared();
|
|
if (!locked_database_for_read)
|
|
{
|
|
releaseTableLock();
|
|
throw Exception(ErrorCodes::UNKNOWN_DATABASE, "Database {} is currently dropped or renamed", database_name);
|
|
}
|
|
}
|
|
}
|
|
|
|
void DDLGuard::releaseTableLock() noexcept
|
|
{
|
|
if (table_lock_removed)
|
|
return;
|
|
|
|
table_lock_removed = true;
|
|
guards_lock.lock();
|
|
UInt32 counter = --it->second.counter;
|
|
table_lock.unlock();
|
|
if (counter == 0)
|
|
map.erase(it);
|
|
guards_lock.unlock();
|
|
}
|
|
|
|
DDLGuard::~DDLGuard()
|
|
{
|
|
if (!is_database_guard)
|
|
db_mutex.unlock_shared();
|
|
releaseTableLock();
|
|
}
|
|
|
|
}
|