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https://github.com/ClickHouse/ClickHouse.git
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126 lines
3.6 KiB
C++
126 lines
3.6 KiB
C++
#include <Databases/DatabasesCommon.h>
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#include <Interpreters/InterpreterCreateQuery.h>
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#include <Parsers/ParserCreateQuery.h>
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#include <Parsers/formatAST.h>
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#include <Storages/StorageDictionary.h>
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#include <Storages/StorageFactory.h>
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#include <Common/typeid_cast.h>
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#include <TableFunctions/TableFunctionFactory.h>
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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 EMPTY_LIST_OF_COLUMNS_PASSED;
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extern const int TABLE_ALREADY_EXISTS;
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extern const int UNKNOWN_TABLE;
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extern const int LOGICAL_ERROR;
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extern const int DICTIONARY_ALREADY_EXISTS;
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}
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DatabaseWithOwnTablesBase::DatabaseWithOwnTablesBase(const String & name_, const String & logger)
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: IDatabase(name_), log(&Logger::get(logger))
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{
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}
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bool DatabaseWithOwnTablesBase::isTableExist(
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const Context & /*context*/,
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const String & table_name) const
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{
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std::lock_guard lock(mutex);
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return tables.find(table_name) != tables.end() || dictionaries.find(table_name) != dictionaries.end();
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}
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StoragePtr DatabaseWithOwnTablesBase::tryGetTable(
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const Context & /*context*/,
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const String & table_name) const
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{
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std::lock_guard lock(mutex);
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auto it = tables.find(table_name);
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if (it != tables.end())
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return it->second;
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return {};
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}
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DatabaseTablesIteratorPtr DatabaseWithOwnTablesBase::getTablesIterator(const Context & /*context*/, const FilterByNameFunction & filter_by_table_name)
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{
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std::lock_guard lock(mutex);
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if (!filter_by_table_name)
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return std::make_unique<DatabaseTablesSnapshotIterator>(tables);
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Tables filtered_tables;
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for (const auto & [table_name, storage] : tables)
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if (filter_by_table_name(table_name))
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filtered_tables.emplace(table_name, storage);
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return std::make_unique<DatabaseTablesSnapshotIterator>(std::move(filtered_tables));
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}
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bool DatabaseWithOwnTablesBase::empty(const Context & /*context*/) const
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{
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std::lock_guard lock(mutex);
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return tables.empty() && dictionaries.empty();
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}
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StoragePtr DatabaseWithOwnTablesBase::detachTable(const String & table_name)
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{
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StoragePtr res;
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{
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std::lock_guard lock(mutex);
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if (dictionaries.count(table_name))
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throw Exception("Cannot detach dictionary " + database_name + "." + table_name + " as table, use DETACH DICTIONARY query.", ErrorCodes::UNKNOWN_TABLE);
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auto it = tables.find(table_name);
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if (it == tables.end())
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throw Exception("Table " + backQuote(database_name) + "." + backQuote(table_name) + " doesn't exist.", ErrorCodes::UNKNOWN_TABLE);
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res = it->second;
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tables.erase(it);
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}
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return res;
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}
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void DatabaseWithOwnTablesBase::attachTable(const String & table_name, const StoragePtr & table)
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{
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std::lock_guard lock(mutex);
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if (!tables.emplace(table_name, table).second)
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throw Exception("Table " + database_name + "." + table_name + " already exists.", ErrorCodes::TABLE_ALREADY_EXISTS);
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}
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void DatabaseWithOwnTablesBase::shutdown()
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{
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/// You can not hold a lock during shutdown.
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/// Because inside `shutdown` function tables can work with database, and mutex is not recursive.
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Tables tables_snapshot;
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{
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std::lock_guard lock(mutex);
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tables_snapshot = tables;
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}
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for (const auto & kv : tables_snapshot)
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{
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kv.second->shutdown();
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}
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std::lock_guard lock(mutex);
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tables.clear();
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dictionaries.clear();
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}
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DatabaseWithOwnTablesBase::~DatabaseWithOwnTablesBase()
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{
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try
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{
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DatabaseWithOwnTablesBase::shutdown();
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}
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catch (...)
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{
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tryLogCurrentException(__PRETTY_FUNCTION__);
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}
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}
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}
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