mirror of
https://github.com/ClickHouse/ClickHouse.git
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1618 lines
68 KiB
C++
1618 lines
68 KiB
C++
#include <memory>
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#include <filesystem>
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#include "Common/Exception.h"
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#include <Common/StringUtils/StringUtils.h>
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#include <Common/escapeForFileName.h>
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#include <Common/typeid_cast.h>
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#include <Common/Macros.h>
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#include <Common/randomSeed.h>
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#include <Common/atomicRename.h>
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#include <Common/hex.h>
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#include <Core/Defines.h>
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#include <Core/Settings.h>
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#include <Core/SettingsEnums.h>
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#include <IO/WriteBufferFromFile.h>
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#include <IO/WriteHelpers.h>
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#include <IO/ReadHelpers.h>
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#include <Parsers/ASTColumnDeclaration.h>
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#include <Parsers/ASTCreateQuery.h>
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#include <Parsers/ASTIdentifier.h>
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#include <Parsers/ASTIndexDeclaration.h>
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#include <Parsers/ASTLiteral.h>
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#include <Parsers/ASTInsertQuery.h>
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#include <Parsers/ParserCreateQuery.h>
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#include <Parsers/formatAST.h>
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#include <Parsers/parseQuery.h>
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#include <Storages/StorageFactory.h>
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#include <Storages/StorageInMemoryMetadata.h>
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#include <Storages/StorageReplicatedMergeTree.h>
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#include <Interpreters/Context.h>
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#include <Interpreters/executeDDLQueryOnCluster.h>
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#include <Interpreters/executeQuery.h>
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#include <Interpreters/Cluster.h>
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#include <Interpreters/DDLTask.h>
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#include <Interpreters/ExpressionAnalyzer.h>
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#include <Interpreters/InterpreterCreateQuery.h>
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#include <Interpreters/InterpreterSelectWithUnionQuery.h>
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#include <Interpreters/InterpreterInsertQuery.h>
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#include <Interpreters/InterpreterRenameQuery.h>
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#include <Interpreters/AddDefaultDatabaseVisitor.h>
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#include <Access/Common/AccessRightsElement.h>
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#include <DataTypes/DataTypeFactory.h>
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#include <DataTypes/NestedUtils.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <DataTypes/DataTypeLowCardinality.h>
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#include <DataTypes/DataTypeNullable.h>
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#include <DataTypes/DataTypeAggregateFunction.h>
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#include <DataTypes/ObjectUtils.h>
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#include <DataTypes/hasNullable.h>
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#include <Databases/DatabaseFactory.h>
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#include <Databases/DatabaseReplicated.h>
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#include <Databases/IDatabase.h>
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#include <Databases/DatabaseOnDisk.h>
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#include <Databases/TablesLoader.h>
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#include <Databases/DDLDependencyVisitor.h>
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#include <Compression/CompressionFactory.h>
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#include <Interpreters/InterpreterDropQuery.h>
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#include <Interpreters/QueryLog.h>
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#include <Interpreters/addTypeConversionToAST.h>
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#include <Interpreters/FunctionNameNormalizer.h>
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#include <Interpreters/ApplyWithSubqueryVisitor.h>
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#include <TableFunctions/TableFunctionFactory.h>
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#include <Common/logger_useful.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 TABLE_ALREADY_EXISTS;
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extern const int DICTIONARY_ALREADY_EXISTS;
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extern const int EMPTY_LIST_OF_COLUMNS_PASSED;
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extern const int INCORRECT_QUERY;
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extern const int UNKNOWN_DATABASE_ENGINE;
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extern const int DUPLICATE_COLUMN;
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extern const int DATABASE_ALREADY_EXISTS;
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extern const int BAD_ARGUMENTS;
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extern const int BAD_DATABASE_FOR_TEMPORARY_TABLE;
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extern const int SUSPICIOUS_TYPE_FOR_LOW_CARDINALITY;
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extern const int ILLEGAL_SYNTAX_FOR_DATA_TYPE;
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extern const int ILLEGAL_COLUMN;
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extern const int LOGICAL_ERROR;
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extern const int UNKNOWN_DATABASE;
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extern const int PATH_ACCESS_DENIED;
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extern const int NOT_IMPLEMENTED;
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extern const int ENGINE_REQUIRED;
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extern const int UNKNOWN_STORAGE;
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extern const int SYNTAX_ERROR;
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}
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namespace fs = std::filesystem;
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InterpreterCreateQuery::InterpreterCreateQuery(const ASTPtr & query_ptr_, ContextMutablePtr context_)
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: WithMutableContext(context_), query_ptr(query_ptr_)
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{
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}
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BlockIO InterpreterCreateQuery::createDatabase(ASTCreateQuery & create)
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{
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String database_name = create.getDatabase();
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auto guard = DatabaseCatalog::instance().getDDLGuard(database_name, "");
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/// Database can be created before or it can be created concurrently in another thread, while we were waiting in DDLGuard
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if (DatabaseCatalog::instance().isDatabaseExist(database_name))
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{
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if (create.if_not_exists)
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return {};
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else
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throw Exception("Database " + database_name + " already exists.", ErrorCodes::DATABASE_ALREADY_EXISTS);
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}
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/// Will write file with database metadata, if needed.
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String database_name_escaped = escapeForFileName(database_name);
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fs::path metadata_path = fs::canonical(getContext()->getPath());
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fs::path metadata_file_tmp_path = metadata_path / "metadata" / (database_name_escaped + ".sql.tmp");
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fs::path metadata_file_path = metadata_path / "metadata" / (database_name_escaped + ".sql");
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if (!create.storage && create.attach)
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{
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if (!fs::exists(metadata_file_path))
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throw Exception("Database engine must be specified for ATTACH DATABASE query", ErrorCodes::UNKNOWN_DATABASE_ENGINE);
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/// Short syntax: try read database definition from file
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auto ast = DatabaseOnDisk::parseQueryFromMetadata(nullptr, getContext(), metadata_file_path);
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create = ast->as<ASTCreateQuery &>();
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if (create.table || !create.storage)
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throw Exception(ErrorCodes::INCORRECT_QUERY, "Metadata file {} contains incorrect CREATE DATABASE query", metadata_file_path.string());
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create.attach = true;
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create.attach_short_syntax = true;
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create.setDatabase(database_name);
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}
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else if (!create.storage)
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{
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/// For new-style databases engine is explicitly specified in .sql
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/// When attaching old-style database during server startup, we must always use Ordinary engine
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if (create.attach)
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throw Exception("Database engine must be specified for ATTACH DATABASE query", ErrorCodes::UNKNOWN_DATABASE_ENGINE);
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bool old_style_database = getContext()->getSettingsRef().default_database_engine.value == DefaultDatabaseEngine::Ordinary;
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auto engine = std::make_shared<ASTFunction>();
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auto storage = std::make_shared<ASTStorage>();
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engine->name = old_style_database ? "Ordinary" : "Atomic";
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engine->no_empty_args = true;
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storage->set(storage->engine, engine);
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create.set(create.storage, storage);
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}
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else if ((create.columns_list
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&& ((create.columns_list->indices && !create.columns_list->indices->children.empty())
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|| (create.columns_list->projections && !create.columns_list->projections->children.empty()))))
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{
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/// Currently, there are no database engines, that support any arguments.
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throw Exception(ErrorCodes::UNKNOWN_DATABASE_ENGINE, "Unknown database engine: {}", serializeAST(*create.storage));
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}
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if (create.storage && !create.storage->engine)
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throw Exception(ErrorCodes::INCORRECT_QUERY, "Database engine must be specified");
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if (create.storage->engine->name == "Atomic"
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|| create.storage->engine->name == "Replicated"
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|| create.storage->engine->name == "MaterializedPostgreSQL")
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{
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if (create.attach && create.uuid == UUIDHelpers::Nil)
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throw Exception(ErrorCodes::INCORRECT_QUERY, "UUID must be specified for ATTACH. "
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"If you want to attach existing database, use just ATTACH DATABASE {};", create.getDatabase());
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else if (create.uuid == UUIDHelpers::Nil)
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create.uuid = UUIDHelpers::generateV4();
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metadata_path = metadata_path / "store" / DatabaseCatalog::getPathForUUID(create.uuid);
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if (!create.attach && fs::exists(metadata_path))
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throw Exception(ErrorCodes::DATABASE_ALREADY_EXISTS, "Metadata directory {} already exists", metadata_path.string());
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}
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else if (create.storage->engine->name == "MaterializeMySQL"
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|| create.storage->engine->name == "MaterializedMySQL")
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{
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/// It creates nested database with Ordinary or Atomic engine depending on UUID in query and default engine setting.
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/// Do nothing if it's an internal ATTACH on server startup or short-syntax ATTACH query from user,
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/// because we got correct query from the metadata file in this case.
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/// If we got query from user, then normalize it first.
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bool attach_from_user = create.attach && !internal && !create.attach_short_syntax;
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bool create_from_user = !create.attach;
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if (create_from_user)
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{
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const auto & default_engine = getContext()->getSettingsRef().default_database_engine.value;
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if (create.uuid == UUIDHelpers::Nil && default_engine == DefaultDatabaseEngine::Atomic)
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create.uuid = UUIDHelpers::generateV4(); /// Will enable Atomic engine for nested database
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}
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else if (attach_from_user && create.uuid == UUIDHelpers::Nil)
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{
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/// Ambiguity is possible: should we attach nested database as Ordinary
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/// or throw "UUID must be specified" for Atomic? So we suggest short syntax for Ordinary.
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throw Exception("Use short attach syntax ('ATTACH DATABASE name;' without engine) to attach existing database "
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"or specify UUID to attach new database with Atomic engine", ErrorCodes::INCORRECT_QUERY);
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}
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/// Set metadata path according to nested engine
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if (create.uuid == UUIDHelpers::Nil)
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metadata_path = metadata_path / "metadata" / database_name_escaped;
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else
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metadata_path = metadata_path / "store" / DatabaseCatalog::getPathForUUID(create.uuid);
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}
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else
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{
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bool is_on_cluster = getContext()->getClientInfo().query_kind == ClientInfo::QueryKind::SECONDARY_QUERY;
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if (create.uuid != UUIDHelpers::Nil && !is_on_cluster)
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throw Exception("Ordinary database engine does not support UUID", ErrorCodes::INCORRECT_QUERY);
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/// Ignore UUID if it's ON CLUSTER query
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create.uuid = UUIDHelpers::Nil;
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metadata_path = metadata_path / "metadata" / database_name_escaped;
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}
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if ((create.storage->engine->name == "MaterializeMySQL" || create.storage->engine->name == "MaterializedMySQL")
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&& !getContext()->getSettingsRef().allow_experimental_database_materialized_mysql
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&& !internal)
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{
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throw Exception("MaterializedMySQL is an experimental database engine. "
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"Enable allow_experimental_database_materialized_mysql to use it.", ErrorCodes::UNKNOWN_DATABASE_ENGINE);
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}
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if (create.storage->engine->name == "Replicated"
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&& !getContext()->getSettingsRef().allow_experimental_database_replicated
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&& !internal)
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{
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throw Exception("Replicated is an experimental database engine. "
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"Enable allow_experimental_database_replicated to use it.", ErrorCodes::UNKNOWN_DATABASE_ENGINE);
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}
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if (create.storage->engine->name == "MaterializedPostgreSQL"
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&& !getContext()->getSettingsRef().allow_experimental_database_materialized_postgresql
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&& !internal)
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{
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throw Exception("MaterializedPostgreSQL is an experimental database engine. "
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"Enable allow_experimental_database_materialized_postgresql to use it.", ErrorCodes::UNKNOWN_DATABASE_ENGINE);
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}
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DatabasePtr database = DatabaseFactory::get(create, metadata_path / "", getContext());
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if (create.uuid != UUIDHelpers::Nil)
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create.setDatabase(TABLE_WITH_UUID_NAME_PLACEHOLDER);
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bool need_write_metadata = !create.attach || !fs::exists(metadata_file_path);
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if (need_write_metadata)
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{
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create.attach = true;
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create.if_not_exists = false;
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WriteBufferFromOwnString statement_buf;
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formatAST(create, statement_buf, false);
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writeChar('\n', statement_buf);
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String statement = statement_buf.str();
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/// Exclusive flag guarantees, that database is not created right now in another thread.
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WriteBufferFromFile out(metadata_file_tmp_path, statement.size(), O_WRONLY | O_CREAT | O_EXCL);
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writeString(statement, out);
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out.next();
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if (getContext()->getSettingsRef().fsync_metadata)
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out.sync();
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out.close();
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}
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/// We attach database before loading it's tables, so do not allow concurrent DDL queries
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auto db_guard = DatabaseCatalog::instance().getExclusiveDDLGuardForDatabase(database_name);
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bool added = false;
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bool renamed = false;
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try
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{
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/// TODO Attach db only after it was loaded. Now it's not possible because of view dependencies
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DatabaseCatalog::instance().attachDatabase(database_name, database);
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added = true;
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if (need_write_metadata)
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{
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/// Prevents from overwriting metadata of detached database
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renameNoReplace(metadata_file_tmp_path, metadata_file_path);
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renamed = true;
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}
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if (!load_database_without_tables)
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{
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/// We use global context here, because storages lifetime is bigger than query context lifetime
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TablesLoader loader{getContext()->getGlobalContext(), {{database_name, database}}, has_force_restore_data_flag, create.attach && force_attach}; //-V560
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loader.loadTables();
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loader.startupTables();
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}
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}
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catch (...)
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{
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if (renamed)
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{
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[[maybe_unused]] bool removed = fs::remove(metadata_file_path);
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assert(removed);
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}
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if (added)
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DatabaseCatalog::instance().detachDatabase(getContext(), database_name, false, false);
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throw;
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}
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return {};
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}
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ASTPtr InterpreterCreateQuery::formatColumns(const NamesAndTypesList & columns)
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{
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auto columns_list = std::make_shared<ASTExpressionList>();
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for (const auto & column : columns)
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{
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const auto column_declaration = std::make_shared<ASTColumnDeclaration>();
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column_declaration->name = column.name;
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ParserDataType type_parser;
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String type_name = column.type->getName();
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const char * pos = type_name.data();
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const char * end = pos + type_name.size();
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column_declaration->type = parseQuery(type_parser, pos, end, "data type", 0, DBMS_DEFAULT_MAX_PARSER_DEPTH);
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columns_list->children.emplace_back(column_declaration);
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}
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return columns_list;
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}
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ASTPtr InterpreterCreateQuery::formatColumns(const NamesAndTypesList & columns, const NamesAndAliases & alias_columns)
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{
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std::shared_ptr<ASTExpressionList> columns_list = std::static_pointer_cast<ASTExpressionList>(formatColumns(columns));
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for (const auto & alias_column : alias_columns)
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{
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const auto column_declaration = std::make_shared<ASTColumnDeclaration>();
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column_declaration->name = alias_column.name;
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ParserDataType type_parser;
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String type_name = alias_column.type->getName();
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const char * type_pos = type_name.data();
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const char * type_end = type_pos + type_name.size();
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column_declaration->type = parseQuery(type_parser, type_pos, type_end, "data type", 0, DBMS_DEFAULT_MAX_PARSER_DEPTH);
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column_declaration->default_specifier = "ALIAS";
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const auto & alias = alias_column.expression;
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const char * alias_pos = alias.data();
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const char * alias_end = alias_pos + alias.size();
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ParserExpression expression_parser;
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column_declaration->default_expression = parseQuery(expression_parser, alias_pos, alias_end, "expression", 0, DBMS_DEFAULT_MAX_PARSER_DEPTH);
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columns_list->children.emplace_back(column_declaration);
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}
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return columns_list;
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}
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ASTPtr InterpreterCreateQuery::formatColumns(const ColumnsDescription & columns)
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{
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auto columns_list = std::make_shared<ASTExpressionList>();
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for (const auto & column : columns)
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{
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const auto column_declaration = std::make_shared<ASTColumnDeclaration>();
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ASTPtr column_declaration_ptr{column_declaration};
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column_declaration->name = column.name;
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ParserDataType type_parser;
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String type_name = column.type->getName();
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const char * type_name_pos = type_name.data();
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const char * type_name_end = type_name_pos + type_name.size();
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column_declaration->type = parseQuery(type_parser, type_name_pos, type_name_end, "data type", 0, DBMS_DEFAULT_MAX_PARSER_DEPTH);
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if (column.default_desc.expression)
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{
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column_declaration->default_specifier = toString(column.default_desc.kind);
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column_declaration->default_expression = column.default_desc.expression->clone();
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column_declaration->children.push_back(column_declaration->default_expression);
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}
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if (!column.comment.empty())
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{
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column_declaration->comment = std::make_shared<ASTLiteral>(Field(column.comment));
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column_declaration->children.push_back(column_declaration->comment);
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}
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if (column.codec)
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{
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column_declaration->codec = column.codec;
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column_declaration->children.push_back(column_declaration->codec);
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}
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if (column.ttl)
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{
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column_declaration->ttl = column.ttl;
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column_declaration->children.push_back(column_declaration->ttl);
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}
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columns_list->children.push_back(column_declaration_ptr);
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}
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return columns_list;
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}
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ASTPtr InterpreterCreateQuery::formatIndices(const IndicesDescription & indices)
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{
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auto res = std::make_shared<ASTExpressionList>();
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for (const auto & index : indices)
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res->children.push_back(index.definition_ast->clone());
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return res;
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}
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ASTPtr InterpreterCreateQuery::formatConstraints(const ConstraintsDescription & constraints)
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{
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auto res = std::make_shared<ASTExpressionList>();
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for (const auto & constraint : constraints.getConstraints())
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res->children.push_back(constraint->clone());
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return res;
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}
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ASTPtr InterpreterCreateQuery::formatProjections(const ProjectionsDescription & projections)
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{
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auto res = std::make_shared<ASTExpressionList>();
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for (const auto & projection : projections)
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res->children.push_back(projection.definition_ast->clone());
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return res;
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}
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ColumnsDescription InterpreterCreateQuery::getColumnsDescription(
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const ASTExpressionList & columns_ast, ContextPtr context_, bool attach)
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{
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/// First, deduce implicit types.
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/** all default_expressions as a single expression list,
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* mixed with conversion-columns for each explicitly specified type */
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ASTPtr default_expr_list = std::make_shared<ASTExpressionList>();
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NamesAndTypesList column_names_and_types;
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bool make_columns_nullable = !attach && context_->getSettingsRef().data_type_default_nullable;
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for (const auto & ast : columns_ast.children)
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{
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const auto & col_decl = ast->as<ASTColumnDeclaration &>();
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DataTypePtr column_type = nullptr;
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if (col_decl.type)
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{
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column_type = DataTypeFactory::instance().get(col_decl.type);
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|
|
|
const auto * aggregate_function_type = typeid_cast<const DataTypeAggregateFunction *>(column_type.get());
|
|
if (attach && aggregate_function_type && aggregate_function_type->isVersioned())
|
|
aggregate_function_type->setVersion(0, /* if_empty */true);
|
|
|
|
if (col_decl.null_modifier)
|
|
{
|
|
if (column_type->isNullable())
|
|
throw Exception("Can't use [NOT] NULL modifier with Nullable type", ErrorCodes::ILLEGAL_SYNTAX_FOR_DATA_TYPE);
|
|
if (*col_decl.null_modifier)
|
|
column_type = makeNullable(column_type);
|
|
}
|
|
else if (make_columns_nullable)
|
|
{
|
|
column_type = makeNullable(column_type);
|
|
}
|
|
else if (!hasNullable(column_type) &&
|
|
col_decl.default_specifier == "DEFAULT" &&
|
|
col_decl.default_expression &&
|
|
col_decl.default_expression->as<ASTLiteral>() &&
|
|
col_decl.default_expression->as<ASTLiteral>()->value.isNull())
|
|
{
|
|
if (column_type->lowCardinality())
|
|
{
|
|
const auto * low_cardinality_type = typeid_cast<const DataTypeLowCardinality *>(column_type.get());
|
|
assert(low_cardinality_type);
|
|
column_type = std::make_shared<DataTypeLowCardinality>(makeNullable(low_cardinality_type->getDictionaryType()));
|
|
}
|
|
else
|
|
column_type = makeNullable(column_type);
|
|
}
|
|
|
|
column_names_and_types.emplace_back(col_decl.name, column_type);
|
|
}
|
|
else
|
|
{
|
|
/// we're creating dummy DataTypeUInt8 in order to prevent the NullPointerException in ExpressionActions
|
|
column_names_and_types.emplace_back(col_decl.name, std::make_shared<DataTypeUInt8>());
|
|
}
|
|
|
|
/// add column to postprocessing if there is a default_expression specified
|
|
if (col_decl.default_expression)
|
|
{
|
|
/** For columns with explicitly-specified type create two expressions:
|
|
* 1. default_expression aliased as column name with _tmp suffix
|
|
* 2. conversion of expression (1) to explicitly-specified type alias as column name
|
|
*/
|
|
if (col_decl.type)
|
|
{
|
|
const auto & final_column_name = col_decl.name;
|
|
const auto tmp_column_name = final_column_name + "_tmp_alter" + toString(randomSeed());
|
|
const auto * data_type_ptr = column_names_and_types.back().type.get();
|
|
|
|
default_expr_list->children.emplace_back(
|
|
setAlias(addTypeConversionToAST(std::make_shared<ASTIdentifier>(tmp_column_name), data_type_ptr->getName()),
|
|
final_column_name));
|
|
|
|
default_expr_list->children.emplace_back(
|
|
setAlias(
|
|
col_decl.default_specifier == "EPHEMERAL" ? /// can be ASTLiteral::value NULL
|
|
std::make_shared<ASTLiteral>(data_type_ptr->getDefault()) :
|
|
col_decl.default_expression->clone(),
|
|
tmp_column_name));
|
|
}
|
|
else
|
|
default_expr_list->children.emplace_back(setAlias(col_decl.default_expression->clone(), col_decl.name));
|
|
}
|
|
}
|
|
|
|
Block defaults_sample_block;
|
|
/// set missing types and wrap default_expression's in a conversion-function if necessary
|
|
if (!default_expr_list->children.empty())
|
|
defaults_sample_block = validateColumnsDefaultsAndGetSampleBlock(default_expr_list, column_names_and_types, context_);
|
|
|
|
bool sanity_check_compression_codecs = !attach && !context_->getSettingsRef().allow_suspicious_codecs;
|
|
bool allow_experimental_codecs = attach || context_->getSettingsRef().allow_experimental_codecs;
|
|
|
|
ColumnsDescription res;
|
|
auto name_type_it = column_names_and_types.begin();
|
|
for (auto ast_it = columns_ast.children.begin(); ast_it != columns_ast.children.end(); ++ast_it, ++name_type_it)
|
|
{
|
|
ColumnDescription column;
|
|
|
|
auto & col_decl = (*ast_it)->as<ASTColumnDeclaration &>();
|
|
|
|
column.name = col_decl.name;
|
|
|
|
/// ignore or not other database extensions depending on compatibility settings
|
|
if (col_decl.default_specifier == "AUTO_INCREMENT"
|
|
&& !context_->getSettingsRef().compatibility_ignore_auto_increment_in_create_table)
|
|
{
|
|
throw Exception(
|
|
"AUTO_INCREMENT is not supported. To ignore the keyword in column declaration, set "
|
|
"`compatibility_ignore_auto_increment_in_create_table` to true",
|
|
ErrorCodes::SYNTAX_ERROR);
|
|
}
|
|
|
|
if (col_decl.default_expression)
|
|
{
|
|
ASTPtr default_expr =
|
|
col_decl.default_specifier == "EPHEMERAL" && col_decl.default_expression->as<ASTLiteral>()->value.isNull() ?
|
|
std::make_shared<ASTLiteral>(DataTypeFactory::instance().get(col_decl.type)->getDefault()) :
|
|
col_decl.default_expression->clone();
|
|
|
|
if (col_decl.type)
|
|
column.type = name_type_it->type;
|
|
else
|
|
column.type = defaults_sample_block.getByName(column.name).type;
|
|
|
|
column.default_desc.kind = columnDefaultKindFromString(col_decl.default_specifier);
|
|
column.default_desc.expression = default_expr;
|
|
}
|
|
else if (col_decl.type)
|
|
column.type = name_type_it->type;
|
|
else
|
|
throw Exception{"Neither default value expression nor type is provided for a column", ErrorCodes::LOGICAL_ERROR};
|
|
|
|
if (col_decl.comment)
|
|
column.comment = col_decl.comment->as<ASTLiteral &>().value.get<String>();
|
|
|
|
if (col_decl.codec)
|
|
{
|
|
if (col_decl.default_specifier == "ALIAS")
|
|
throw Exception{"Cannot specify codec for column type ALIAS", ErrorCodes::BAD_ARGUMENTS};
|
|
column.codec = CompressionCodecFactory::instance().validateCodecAndGetPreprocessedAST(
|
|
col_decl.codec, column.type, sanity_check_compression_codecs, allow_experimental_codecs);
|
|
}
|
|
|
|
if (col_decl.ttl)
|
|
column.ttl = col_decl.ttl;
|
|
|
|
res.add(std::move(column));
|
|
}
|
|
|
|
if (!attach && context_->getSettingsRef().flatten_nested)
|
|
res.flattenNested();
|
|
|
|
if (res.getAllPhysical().empty())
|
|
throw Exception{"Cannot CREATE table without physical columns", ErrorCodes::EMPTY_LIST_OF_COLUMNS_PASSED};
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
ConstraintsDescription InterpreterCreateQuery::getConstraintsDescription(const ASTExpressionList * constraints)
|
|
{
|
|
ASTs constraints_data;
|
|
if (constraints)
|
|
for (const auto & constraint : constraints->children)
|
|
constraints_data.push_back(constraint->clone());
|
|
|
|
return ConstraintsDescription{constraints_data};
|
|
}
|
|
|
|
|
|
InterpreterCreateQuery::TableProperties InterpreterCreateQuery::getTablePropertiesAndNormalizeCreateQuery(ASTCreateQuery & create) const
|
|
{
|
|
/// Set the table engine if it was not specified explicitly.
|
|
setEngine(create);
|
|
|
|
/// We have to check access rights again (in case engine was changed).
|
|
if (create.storage)
|
|
{
|
|
auto source_access_type = StorageFactory::instance().getSourceAccessType(create.storage->engine->name);
|
|
if (source_access_type != AccessType::NONE)
|
|
getContext()->checkAccess(source_access_type);
|
|
}
|
|
|
|
TableProperties properties;
|
|
TableLockHolder as_storage_lock;
|
|
|
|
if (create.columns_list)
|
|
{
|
|
if (create.as_table_function && (create.columns_list->indices || create.columns_list->constraints))
|
|
throw Exception("Indexes and constraints are not supported for table functions", ErrorCodes::INCORRECT_QUERY);
|
|
|
|
if (create.columns_list->columns)
|
|
{
|
|
properties.columns = getColumnsDescription(*create.columns_list->columns, getContext(), create.attach);
|
|
}
|
|
|
|
if (create.columns_list->indices)
|
|
for (const auto & index : create.columns_list->indices->children)
|
|
properties.indices.push_back(
|
|
IndexDescription::getIndexFromAST(index->clone(), properties.columns, getContext()));
|
|
|
|
if (create.columns_list->projections)
|
|
for (const auto & projection_ast : create.columns_list->projections->children)
|
|
{
|
|
auto projection = ProjectionDescription::getProjectionFromAST(projection_ast, properties.columns, getContext());
|
|
properties.projections.add(std::move(projection));
|
|
}
|
|
|
|
properties.constraints = getConstraintsDescription(create.columns_list->constraints);
|
|
}
|
|
else if (!create.as_table.empty())
|
|
{
|
|
String as_database_name = getContext()->resolveDatabase(create.as_database);
|
|
StoragePtr as_storage = DatabaseCatalog::instance().getTable({as_database_name, create.as_table}, getContext());
|
|
|
|
/// as_storage->getColumns() and setEngine(...) must be called under structure lock of other_table for CREATE ... AS other_table.
|
|
as_storage_lock = as_storage->lockForShare(getContext()->getCurrentQueryId(), getContext()->getSettingsRef().lock_acquire_timeout);
|
|
auto as_storage_metadata = as_storage->getInMemoryMetadataPtr();
|
|
properties.columns = as_storage_metadata->getColumns();
|
|
|
|
/// Secondary indices and projections make sense only for MergeTree family of storage engines.
|
|
/// We should not copy them for other storages.
|
|
if (create.storage && endsWith(create.storage->engine->name, "MergeTree"))
|
|
{
|
|
properties.indices = as_storage_metadata->getSecondaryIndices();
|
|
properties.projections = as_storage_metadata->getProjections().clone();
|
|
}
|
|
else
|
|
{
|
|
/// Only MergeTree support TTL
|
|
properties.columns.resetColumnTTLs();
|
|
}
|
|
|
|
properties.constraints = as_storage_metadata->getConstraints();
|
|
}
|
|
else if (create.select)
|
|
{
|
|
Block as_select_sample = InterpreterSelectWithUnionQuery::getSampleBlock(create.select->clone(), getContext());
|
|
properties.columns = ColumnsDescription(as_select_sample.getNamesAndTypesList());
|
|
}
|
|
else if (create.as_table_function)
|
|
{
|
|
/// Table function without columns list.
|
|
auto table_function = TableFunctionFactory::instance().get(create.as_table_function, getContext());
|
|
properties.columns = table_function->getActualTableStructure(getContext());
|
|
}
|
|
else if (create.is_dictionary)
|
|
{
|
|
return {};
|
|
}
|
|
/// We can have queries like "CREATE TABLE <table> ENGINE=<engine>" if <engine>
|
|
/// supports schema inference (will determine table structure in it's constructor).
|
|
else if (!StorageFactory::instance().checkIfStorageSupportsSchemaInterface(create.storage->engine->name)) // NOLINT
|
|
throw Exception("Incorrect CREATE query: required list of column descriptions or AS section or SELECT.", ErrorCodes::INCORRECT_QUERY);
|
|
|
|
/// Even if query has list of columns, canonicalize it (unfold Nested columns).
|
|
if (!create.columns_list)
|
|
create.set(create.columns_list, std::make_shared<ASTColumns>());
|
|
|
|
ASTPtr new_columns = formatColumns(properties.columns);
|
|
ASTPtr new_indices = formatIndices(properties.indices);
|
|
ASTPtr new_constraints = formatConstraints(properties.constraints);
|
|
ASTPtr new_projections = formatProjections(properties.projections);
|
|
|
|
create.columns_list->setOrReplace(create.columns_list->columns, new_columns);
|
|
create.columns_list->setOrReplace(create.columns_list->indices, new_indices);
|
|
create.columns_list->setOrReplace(create.columns_list->constraints, new_constraints);
|
|
create.columns_list->setOrReplace(create.columns_list->projections, new_projections);
|
|
|
|
validateTableStructure(create, properties);
|
|
|
|
assert(as_database_saved.empty() && as_table_saved.empty());
|
|
std::swap(create.as_database, as_database_saved);
|
|
std::swap(create.as_table, as_table_saved);
|
|
|
|
return properties;
|
|
}
|
|
|
|
void InterpreterCreateQuery::validateTableStructure(const ASTCreateQuery & create,
|
|
const InterpreterCreateQuery::TableProperties & properties) const
|
|
{
|
|
/// Check for duplicates
|
|
std::set<String> all_columns;
|
|
for (const auto & column : properties.columns)
|
|
{
|
|
if (!all_columns.emplace(column.name).second)
|
|
throw Exception("Column " + backQuoteIfNeed(column.name) + " already exists", ErrorCodes::DUPLICATE_COLUMN);
|
|
}
|
|
|
|
const auto & settings = getContext()->getSettingsRef();
|
|
|
|
/// Check low cardinality types in creating table if it was not allowed in setting
|
|
if (!create.attach && !settings.allow_suspicious_low_cardinality_types && !create.is_materialized_view)
|
|
{
|
|
for (const auto & name_and_type_pair : properties.columns.getAllPhysical())
|
|
{
|
|
if (const auto * current_type_ptr = typeid_cast<const DataTypeLowCardinality *>(name_and_type_pair.type.get()))
|
|
{
|
|
if (!isStringOrFixedString(*removeNullable(current_type_ptr->getDictionaryType())))
|
|
throw Exception("Creating columns of type " + current_type_ptr->getName() + " is prohibited by default "
|
|
"due to expected negative impact on performance. "
|
|
"It can be enabled with the \"allow_suspicious_low_cardinality_types\" setting.",
|
|
ErrorCodes::SUSPICIOUS_TYPE_FOR_LOW_CARDINALITY);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!create.attach && !settings.allow_experimental_geo_types)
|
|
{
|
|
for (const auto & name_and_type_pair : properties.columns.getAllPhysical())
|
|
{
|
|
const auto & type = name_and_type_pair.type->getName();
|
|
if (type == "MultiPolygon" || type == "Polygon" || type == "Ring" || type == "Point")
|
|
{
|
|
String message = "Cannot create table with column '" + name_and_type_pair.name + "' which type is '"
|
|
+ type + "' because experimental geo types are not allowed. "
|
|
+ "Set setting allow_experimental_geo_types = 1 in order to allow it";
|
|
throw Exception(message, ErrorCodes::ILLEGAL_COLUMN);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!create.attach && !settings.allow_experimental_object_type)
|
|
{
|
|
for (const auto & [name, type] : properties.columns.getAllPhysical())
|
|
{
|
|
if (isObject(type))
|
|
{
|
|
throw Exception(ErrorCodes::ILLEGAL_COLUMN,
|
|
"Cannot create table with column '{}' which type is '{}' "
|
|
"because experimental Object type is not allowed. "
|
|
"Set setting allow_experimental_object_type = 1 in order to allow it",
|
|
name, type->getName());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
String InterpreterCreateQuery::getTableEngineName(DefaultTableEngine default_table_engine)
|
|
{
|
|
switch (default_table_engine)
|
|
{
|
|
case DefaultTableEngine::Log:
|
|
return "Log";
|
|
|
|
case DefaultTableEngine::StripeLog:
|
|
return "StripeLog";
|
|
|
|
case DefaultTableEngine::MergeTree:
|
|
return "MergeTree";
|
|
|
|
case DefaultTableEngine::ReplacingMergeTree:
|
|
return "ReplacingMergeTree";
|
|
|
|
case DefaultTableEngine::ReplicatedMergeTree:
|
|
return "ReplicatedMergeTree";
|
|
|
|
case DefaultTableEngine::ReplicatedReplacingMergeTree:
|
|
return "ReplicatedReplacingMergeTree";
|
|
|
|
case DefaultTableEngine::Memory:
|
|
return "Memory";
|
|
|
|
default:
|
|
throw Exception("default_table_engine is set to unknown value", ErrorCodes::LOGICAL_ERROR);
|
|
}
|
|
}
|
|
|
|
void InterpreterCreateQuery::setDefaultTableEngine(ASTStorage & storage, ContextPtr local_context)
|
|
{
|
|
if (local_context->getSettingsRef().default_table_engine.value == DefaultTableEngine::None)
|
|
throw Exception(ErrorCodes::ENGINE_REQUIRED, "Table engine is not specified in CREATE query");
|
|
|
|
auto engine_ast = std::make_shared<ASTFunction>();
|
|
auto default_table_engine = local_context->getSettingsRef().default_table_engine.value;
|
|
engine_ast->name = getTableEngineName(default_table_engine);
|
|
engine_ast->no_empty_args = true;
|
|
storage.set(storage.engine, engine_ast);
|
|
}
|
|
|
|
void InterpreterCreateQuery::setEngine(ASTCreateQuery & create) const
|
|
{
|
|
if (create.as_table_function)
|
|
return;
|
|
|
|
if (create.is_dictionary || create.is_ordinary_view || create.is_live_view || create.is_window_view)
|
|
return;
|
|
|
|
if (create.is_materialized_view && create.to_table_id)
|
|
return;
|
|
|
|
if (create.temporary)
|
|
{
|
|
if (create.storage && create.storage->engine && create.storage->engine->name != "Memory")
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY, "Temporary tables can only be created with ENGINE = Memory, not {}",
|
|
create.storage->engine->name);
|
|
|
|
/// It's possible if some part of storage definition (such as PARTITION BY) is specified, but ENGINE is not.
|
|
/// It makes sense when default_table_engine setting is used, but not for temporary tables.
|
|
/// For temporary tables we ignore this setting to allow CREATE TEMPORARY TABLE query without specifying ENGINE
|
|
/// even if setting is set to MergeTree or something like that (otherwise MergeTree will be substituted and query will fail).
|
|
if (create.storage && !create.storage->engine)
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY, "Invalid storage definition for temporary table: must be either ENGINE = Memory or empty");
|
|
|
|
auto engine_ast = std::make_shared<ASTFunction>();
|
|
engine_ast->name = "Memory";
|
|
engine_ast->no_empty_args = true;
|
|
auto storage_ast = std::make_shared<ASTStorage>();
|
|
storage_ast->set(storage_ast->engine, engine_ast);
|
|
create.set(create.storage, storage_ast);
|
|
return;
|
|
}
|
|
|
|
if (create.storage)
|
|
{
|
|
/// Some part of storage definition (such as PARTITION BY) is specified, but ENGINE is not: just set default one.
|
|
if (!create.storage->engine)
|
|
setDefaultTableEngine(*create.storage, getContext());
|
|
return;
|
|
}
|
|
|
|
if (!create.as_table.empty())
|
|
{
|
|
/// NOTE Getting the structure from the table specified in the AS is done not atomically with the creation of the table.
|
|
|
|
String as_database_name = getContext()->resolveDatabase(create.as_database);
|
|
String as_table_name = create.as_table;
|
|
|
|
ASTPtr as_create_ptr = DatabaseCatalog::instance().getDatabase(as_database_name)->getCreateTableQuery(as_table_name, getContext());
|
|
const auto & as_create = as_create_ptr->as<ASTCreateQuery &>();
|
|
|
|
const String qualified_name = backQuoteIfNeed(as_database_name) + "." + backQuoteIfNeed(as_table_name);
|
|
|
|
if (as_create.is_ordinary_view)
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY, "Cannot CREATE a table AS {}, it is a View", qualified_name);
|
|
|
|
if (as_create.is_live_view)
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY, "Cannot CREATE a table AS {}, it is a Live View", qualified_name);
|
|
|
|
if (as_create.is_window_view)
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY, "Cannot CREATE a table AS {}, it is a Window View", qualified_name);
|
|
|
|
if (as_create.is_dictionary)
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY, "Cannot CREATE a table AS {}, it is a Dictionary", qualified_name);
|
|
|
|
if (as_create.storage)
|
|
create.set(create.storage, as_create.storage->ptr());
|
|
else if (as_create.as_table_function)
|
|
create.as_table_function = as_create.as_table_function->clone();
|
|
else
|
|
throw Exception(ErrorCodes::LOGICAL_ERROR, "Cannot set engine, it's a bug.");
|
|
|
|
return;
|
|
}
|
|
|
|
create.set(create.storage, std::make_shared<ASTStorage>());
|
|
setDefaultTableEngine(*create.storage, getContext());
|
|
}
|
|
|
|
static void generateUUIDForTable(ASTCreateQuery & create)
|
|
{
|
|
if (create.uuid == UUIDHelpers::Nil)
|
|
create.uuid = UUIDHelpers::generateV4();
|
|
|
|
/// If destination table (to_table_id) is not specified for materialized view,
|
|
/// then MV will create inner table. We should generate UUID of inner table here,
|
|
/// so it will be the same on all hosts if query in ON CLUSTER or database engine is Replicated.
|
|
bool need_uuid_for_inner_table = !create.attach && create.is_materialized_view && !create.to_table_id;
|
|
if (need_uuid_for_inner_table && create.to_inner_uuid == UUIDHelpers::Nil)
|
|
create.to_inner_uuid = UUIDHelpers::generateV4();
|
|
}
|
|
|
|
void InterpreterCreateQuery::assertOrSetUUID(ASTCreateQuery & create, const DatabasePtr & database) const
|
|
{
|
|
const auto * kind = create.is_dictionary ? "Dictionary" : "Table";
|
|
const auto * kind_upper = create.is_dictionary ? "DICTIONARY" : "TABLE";
|
|
|
|
if (database->getEngineName() == "Replicated" && getContext()->getClientInfo().is_replicated_database_internal
|
|
&& !internal)
|
|
{
|
|
if (create.uuid == UUIDHelpers::Nil)
|
|
throw Exception("Table UUID is not specified in DDL log", ErrorCodes::LOGICAL_ERROR);
|
|
}
|
|
|
|
bool from_path = create.attach_from_path.has_value();
|
|
|
|
if (database->getUUID() != UUIDHelpers::Nil)
|
|
{
|
|
if (create.attach && !from_path && create.uuid == UUIDHelpers::Nil)
|
|
{
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY,
|
|
"Incorrect ATTACH {} query for Atomic database engine. "
|
|
"Use one of the following queries instead:\n"
|
|
"1. ATTACH {} {};\n"
|
|
"2. CREATE {} {} <table definition>;\n"
|
|
"3. ATTACH {} {} FROM '/path/to/data/' <table definition>;\n"
|
|
"4. ATTACH {} {} UUID '<uuid>' <table definition>;",
|
|
kind_upper,
|
|
kind_upper, create.table,
|
|
kind_upper, create.table,
|
|
kind_upper, create.table,
|
|
kind_upper, create.table);
|
|
}
|
|
|
|
generateUUIDForTable(create);
|
|
}
|
|
else
|
|
{
|
|
bool is_on_cluster = getContext()->getClientInfo().query_kind == ClientInfo::QueryKind::SECONDARY_QUERY;
|
|
bool has_uuid = create.uuid != UUIDHelpers::Nil || create.to_inner_uuid != UUIDHelpers::Nil;
|
|
if (has_uuid && !is_on_cluster)
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY,
|
|
"{} UUID specified, but engine of database {} is not Atomic", kind, create.getDatabase());
|
|
|
|
/// Ignore UUID if it's ON CLUSTER query
|
|
create.uuid = UUIDHelpers::Nil;
|
|
create.to_inner_uuid = UUIDHelpers::Nil;
|
|
}
|
|
}
|
|
|
|
|
|
BlockIO InterpreterCreateQuery::createTable(ASTCreateQuery & create)
|
|
{
|
|
/// Temporary tables are created out of databases.
|
|
if (create.temporary && create.database)
|
|
throw Exception("Temporary tables cannot be inside a database. You should not specify a database for a temporary table.",
|
|
ErrorCodes::BAD_DATABASE_FOR_TEMPORARY_TABLE);
|
|
|
|
String current_database = getContext()->getCurrentDatabase();
|
|
auto database_name = create.database ? create.getDatabase() : current_database;
|
|
|
|
// If this is a stub ATTACH query, read the query definition from the database
|
|
if (create.attach && !create.storage && !create.columns_list)
|
|
{
|
|
auto database = DatabaseCatalog::instance().getDatabase(database_name);
|
|
|
|
if (database->getEngineName() == "Replicated")
|
|
{
|
|
auto guard = DatabaseCatalog::instance().getDDLGuard(database_name, create.getTable());
|
|
|
|
if (auto * ptr = typeid_cast<DatabaseReplicated *>(database.get());
|
|
ptr && !getContext()->getClientInfo().is_replicated_database_internal)
|
|
{
|
|
create.setDatabase(database_name);
|
|
guard->releaseTableLock();
|
|
return ptr->tryEnqueueReplicatedDDL(query_ptr, getContext(), internal);
|
|
}
|
|
}
|
|
|
|
bool if_not_exists = create.if_not_exists;
|
|
|
|
// Table SQL definition is available even if the table is detached (even permanently)
|
|
auto query = database->getCreateTableQuery(create.getTable(), getContext());
|
|
auto create_query = query->as<ASTCreateQuery &>();
|
|
|
|
if (!create.is_dictionary && create_query.is_dictionary)
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY,
|
|
"Cannot ATTACH TABLE {}.{}, it is a Dictionary",
|
|
backQuoteIfNeed(database_name), backQuoteIfNeed(create.getTable()));
|
|
|
|
if (create.is_dictionary && !create_query.is_dictionary)
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY,
|
|
"Cannot ATTACH DICTIONARY {}.{}, it is a Table",
|
|
backQuoteIfNeed(database_name), backQuoteIfNeed(create.getTable()));
|
|
|
|
create = create_query; // Copy the saved create query, but use ATTACH instead of CREATE
|
|
|
|
create.attach = true;
|
|
create.attach_short_syntax = true;
|
|
create.if_not_exists = if_not_exists;
|
|
}
|
|
|
|
/// TODO throw exception if !create.attach_short_syntax && !create.attach_from_path && !internal
|
|
|
|
if (create.attach_from_path)
|
|
{
|
|
fs::path user_files = fs::path(getContext()->getUserFilesPath()).lexically_normal();
|
|
fs::path root_path = fs::path(getContext()->getPath()).lexically_normal();
|
|
|
|
if (getContext()->getClientInfo().query_kind == ClientInfo::QueryKind::INITIAL_QUERY)
|
|
{
|
|
fs::path data_path = fs::path(*create.attach_from_path).lexically_normal();
|
|
if (data_path.is_relative())
|
|
data_path = (user_files / data_path).lexically_normal();
|
|
if (!startsWith(data_path, user_files))
|
|
throw Exception(ErrorCodes::PATH_ACCESS_DENIED,
|
|
"Data directory {} must be inside {} to attach it", String(data_path), String(user_files));
|
|
|
|
/// Data path must be relative to root_path
|
|
create.attach_from_path = fs::relative(data_path, root_path) / "";
|
|
}
|
|
else
|
|
{
|
|
fs::path data_path = (root_path / *create.attach_from_path).lexically_normal();
|
|
if (!startsWith(data_path, user_files))
|
|
throw Exception(ErrorCodes::PATH_ACCESS_DENIED,
|
|
"Data directory {} must be inside {} to attach it", String(data_path), String(user_files));
|
|
}
|
|
}
|
|
else if (create.attach && !create.attach_short_syntax && getContext()->getClientInfo().query_kind != ClientInfo::QueryKind::SECONDARY_QUERY)
|
|
{
|
|
auto * log = &Poco::Logger::get("InterpreterCreateQuery");
|
|
LOG_WARNING(log, "ATTACH TABLE query with full table definition is not recommended: "
|
|
"use either ATTACH TABLE {}; to attach existing table "
|
|
"or CREATE TABLE {} <table definition>; to create new table "
|
|
"or ATTACH TABLE {} FROM '/path/to/data/' <table definition>; to create new table and attach data.",
|
|
create.getTable(), create.getTable(), create.getTable());
|
|
}
|
|
|
|
if (!create.temporary && !create.database)
|
|
create.setDatabase(current_database);
|
|
if (create.to_table_id && create.to_table_id.database_name.empty())
|
|
create.to_table_id.database_name = current_database;
|
|
|
|
if (create.select && create.isView())
|
|
{
|
|
// Expand CTE before filling default database
|
|
ApplyWithSubqueryVisitor().visit(*create.select);
|
|
AddDefaultDatabaseVisitor visitor(getContext(), current_database);
|
|
visitor.visit(*create.select);
|
|
}
|
|
|
|
if (create.columns_list)
|
|
{
|
|
AddDefaultDatabaseVisitor visitor(getContext(), current_database);
|
|
visitor.visit(*create.columns_list);
|
|
}
|
|
|
|
/// Set and retrieve list of columns, indices and constraints. Set table engine if needed. Rewrite query in canonical way.
|
|
TableProperties properties = getTablePropertiesAndNormalizeCreateQuery(create);
|
|
|
|
/// Check type compatible for materialized dest table and select columns
|
|
if (create.select && create.is_materialized_view && create.to_table_id)
|
|
{
|
|
if (StoragePtr to_table = DatabaseCatalog::instance().tryGetTable(
|
|
{create.to_table_id.database_name, create.to_table_id.table_name, create.to_table_id.uuid},
|
|
getContext()
|
|
))
|
|
{
|
|
Block input_block = InterpreterSelectWithUnionQuery(
|
|
create.select->clone(), getContext(), SelectQueryOptions().analyze()).getSampleBlock();
|
|
|
|
Block output_block = to_table->getInMemoryMetadataPtr()->getSampleBlock();
|
|
|
|
ColumnsWithTypeAndName input_columns;
|
|
ColumnsWithTypeAndName output_columns;
|
|
for (const auto & input_column : input_block)
|
|
{
|
|
if (const auto * output_column = output_block.findByName(input_column.name))
|
|
{
|
|
input_columns.push_back(input_column.cloneEmpty());
|
|
output_columns.push_back(output_column->cloneEmpty());
|
|
}
|
|
}
|
|
|
|
ActionsDAG::makeConvertingActions(
|
|
input_columns,
|
|
output_columns,
|
|
ActionsDAG::MatchColumnsMode::Position
|
|
);
|
|
}
|
|
}
|
|
|
|
DatabasePtr database;
|
|
bool need_add_to_database = !create.temporary;
|
|
if (need_add_to_database)
|
|
database = DatabaseCatalog::instance().getDatabase(database_name);
|
|
|
|
if (need_add_to_database && database->getEngineName() == "Replicated")
|
|
{
|
|
auto guard = DatabaseCatalog::instance().getDDLGuard(create.getDatabase(), create.getTable());
|
|
|
|
if (auto * ptr = typeid_cast<DatabaseReplicated *>(database.get());
|
|
ptr && !getContext()->getClientInfo().is_replicated_database_internal)
|
|
{
|
|
assertOrSetUUID(create, database);
|
|
guard->releaseTableLock();
|
|
return ptr->tryEnqueueReplicatedDDL(query_ptr, getContext(), internal);
|
|
}
|
|
}
|
|
|
|
if (create.replace_table)
|
|
return doCreateOrReplaceTable(create, properties);
|
|
|
|
/// Actually creates table
|
|
bool created = doCreateTable(create, properties);
|
|
|
|
if (!created) /// Table already exists
|
|
return {};
|
|
|
|
/// If table has dependencies - add them to the graph
|
|
QualifiedTableName qualified_name{database_name, create.getTable()};
|
|
TableNamesSet loading_dependencies = getDependenciesSetFromCreateQuery(getContext()->getGlobalContext(), qualified_name, query_ptr);
|
|
if (!loading_dependencies.empty())
|
|
DatabaseCatalog::instance().addLoadingDependencies(qualified_name, std::move(loading_dependencies));
|
|
|
|
return fillTableIfNeeded(create);
|
|
}
|
|
|
|
bool InterpreterCreateQuery::doCreateTable(ASTCreateQuery & create,
|
|
const InterpreterCreateQuery::TableProperties & properties)
|
|
{
|
|
std::unique_ptr<DDLGuard> guard;
|
|
|
|
String data_path;
|
|
DatabasePtr database;
|
|
|
|
bool need_add_to_database = !create.temporary;
|
|
if (need_add_to_database)
|
|
{
|
|
/** If the request specifies IF NOT EXISTS, we allow concurrent CREATE queries (which do nothing).
|
|
* If table doesn't exist, one thread is creating table, while others wait in DDLGuard.
|
|
*/
|
|
guard = DatabaseCatalog::instance().getDDLGuard(create.getDatabase(), create.getTable());
|
|
|
|
database = DatabaseCatalog::instance().getDatabase(create.getDatabase());
|
|
assertOrSetUUID(create, database);
|
|
|
|
String storage_name = create.is_dictionary ? "Dictionary" : "Table";
|
|
auto storage_already_exists_error_code = create.is_dictionary ? ErrorCodes::DICTIONARY_ALREADY_EXISTS : ErrorCodes::TABLE_ALREADY_EXISTS;
|
|
|
|
/// Table can be created before or it can be created concurrently in another thread, while we were waiting in DDLGuard.
|
|
if (database->isTableExist(create.getTable(), getContext()))
|
|
{
|
|
/// TODO Check structure of table
|
|
if (create.if_not_exists)
|
|
return false;
|
|
else if (create.replace_view)
|
|
{
|
|
/// when executing CREATE OR REPLACE VIEW, drop current existing view
|
|
auto drop_ast = std::make_shared<ASTDropQuery>();
|
|
drop_ast->setDatabase(create.getDatabase());
|
|
drop_ast->setTable(create.getTable());
|
|
drop_ast->no_ddl_lock = true;
|
|
|
|
auto drop_context = Context::createCopy(context);
|
|
InterpreterDropQuery interpreter(drop_ast, drop_context);
|
|
interpreter.execute();
|
|
}
|
|
else
|
|
throw Exception(storage_already_exists_error_code,
|
|
"{} {}.{} already exists", storage_name, backQuoteIfNeed(create.getDatabase()), backQuoteIfNeed(create.getTable()));
|
|
}
|
|
else if (!create.attach)
|
|
{
|
|
/// Checking that table may exists in detached/detached permanently state
|
|
try
|
|
{
|
|
database->checkMetadataFilenameAvailability(create.getTable());
|
|
}
|
|
catch (const Exception &)
|
|
{
|
|
if (create.if_not_exists)
|
|
return false;
|
|
throw;
|
|
}
|
|
}
|
|
|
|
|
|
data_path = database->getTableDataPath(create);
|
|
|
|
if (!create.attach && !data_path.empty() && fs::exists(fs::path{getContext()->getPath()} / data_path))
|
|
throw Exception(storage_already_exists_error_code,
|
|
"Directory for {} data {} already exists", Poco::toLower(storage_name), String(data_path));
|
|
}
|
|
else
|
|
{
|
|
if (create.if_not_exists && getContext()->tryResolveStorageID({"", create.getTable()}, Context::ResolveExternal))
|
|
return false;
|
|
|
|
String temporary_table_name = create.getTable();
|
|
auto temporary_table = TemporaryTableHolder(getContext(), properties.columns, properties.constraints, query_ptr);
|
|
getContext()->getSessionContext()->addExternalTable(temporary_table_name, std::move(temporary_table));
|
|
return true;
|
|
}
|
|
|
|
bool from_path = create.attach_from_path.has_value();
|
|
String actual_data_path = data_path;
|
|
if (from_path)
|
|
{
|
|
if (data_path.empty())
|
|
throw Exception(ErrorCodes::NOT_IMPLEMENTED,
|
|
"ATTACH ... FROM ... query is not supported for {} database engine", database->getEngineName());
|
|
/// We will try to create Storage instance with provided data path
|
|
data_path = *create.attach_from_path;
|
|
create.attach_from_path = std::nullopt;
|
|
}
|
|
|
|
if (create.attach)
|
|
{
|
|
/// If table was detached it's not possible to attach it back while some threads are using
|
|
/// old instance of the storage. For example, AsynchronousMetrics may cause ATTACH to fail,
|
|
/// so we allow waiting here. If database_atomic_wait_for_drop_and_detach_synchronously is disabled
|
|
/// and old storage instance still exists it will throw exception.
|
|
if (getContext()->getSettingsRef().database_atomic_wait_for_drop_and_detach_synchronously)
|
|
database->waitDetachedTableNotInUse(create.uuid);
|
|
else
|
|
database->checkDetachedTableNotInUse(create.uuid);
|
|
}
|
|
|
|
StoragePtr res;
|
|
/// NOTE: CREATE query may be rewritten by Storage creator or table function
|
|
if (create.as_table_function)
|
|
{
|
|
const auto & factory = TableFunctionFactory::instance();
|
|
auto table_func = factory.get(create.as_table_function, getContext());
|
|
/// In case of CREATE AS table_function() query we should use global context
|
|
/// in storage creation because there will be no query context on server startup
|
|
/// and because storage lifetime is bigger than query context lifetime.
|
|
res = table_func->execute(create.as_table_function, getContext(), create.getTable(), properties.columns, /*use_global_context=*/true);
|
|
res->renameInMemory({create.getDatabase(), create.getTable(), create.uuid});
|
|
}
|
|
else
|
|
{
|
|
res = StorageFactory::instance().get(create,
|
|
data_path,
|
|
getContext(),
|
|
getContext()->getGlobalContext(),
|
|
properties.columns,
|
|
properties.constraints,
|
|
false);
|
|
|
|
/// If schema wes inferred while storage creation, add columns description to create query.
|
|
addColumnsDescriptionToCreateQueryIfNecessary(query_ptr->as<ASTCreateQuery &>(), res);
|
|
}
|
|
|
|
if (!create.attach && getContext()->getSettingsRef().database_replicated_allow_only_replicated_engine)
|
|
{
|
|
bool is_replicated_storage = typeid_cast<const StorageReplicatedMergeTree *>(res.get()) != nullptr;
|
|
if (!is_replicated_storage && res->storesDataOnDisk() && database && database->getEngineName() == "Replicated")
|
|
throw Exception(ErrorCodes::UNKNOWN_STORAGE,
|
|
"Only tables with a Replicated engine or tables which do not store data on disk are allowed in a Replicated database");
|
|
}
|
|
|
|
if (from_path && !res->storesDataOnDisk())
|
|
throw Exception(ErrorCodes::NOT_IMPLEMENTED,
|
|
"ATTACH ... FROM ... query is not supported for {} table engine, "
|
|
"because such tables do not store any data on disk. Use CREATE instead.", res->getName());
|
|
|
|
database->createTable(getContext(), create.getTable(), res, query_ptr);
|
|
|
|
/// Move table data to the proper place. Wo do not move data earlier to avoid situations
|
|
/// when data directory moved, but table has not been created due to some error.
|
|
if (from_path)
|
|
res->rename(actual_data_path, {create.getDatabase(), create.getTable(), create.uuid});
|
|
|
|
/// We must call "startup" and "shutdown" while holding DDLGuard.
|
|
/// Because otherwise method "shutdown" (from InterpreterDropQuery) can be called before startup
|
|
/// (in case when table was created and instantly dropped before started up)
|
|
///
|
|
/// Method "startup" may create background tasks and method "shutdown" will wait for them.
|
|
/// But if "shutdown" is called before "startup", it will exit early, because there are no background tasks to wait.
|
|
/// Then background task is created by "startup" method. And when destructor of a table object is called, background task is still active,
|
|
/// and the task will use references to freed data.
|
|
|
|
/// Also note that "startup" method is exception-safe. If exception is thrown from "startup",
|
|
/// we can safely destroy the object without a call to "shutdown", because there is guarantee
|
|
/// that no background threads/similar resources remain after exception from "startup".
|
|
|
|
if (!res->supportsDynamicSubcolumns() && hasObjectColumns(res->getInMemoryMetadataPtr()->getColumns()))
|
|
{
|
|
throw Exception(ErrorCodes::ILLEGAL_COLUMN,
|
|
"Cannot create table with column of type Object, "
|
|
"because storage {} doesn't support dynamic subcolumns",
|
|
res->getName());
|
|
}
|
|
|
|
res->startup();
|
|
return true;
|
|
}
|
|
|
|
|
|
BlockIO InterpreterCreateQuery::doCreateOrReplaceTable(ASTCreateQuery & create,
|
|
const InterpreterCreateQuery::TableProperties & properties)
|
|
{
|
|
/// Replicated database requires separate contexts for each DDL query
|
|
ContextPtr current_context = getContext();
|
|
ContextMutablePtr create_context = Context::createCopy(current_context);
|
|
create_context->setQueryContext(std::const_pointer_cast<Context>(current_context));
|
|
|
|
auto make_drop_context = [&](bool on_error) -> ContextMutablePtr
|
|
{
|
|
ContextMutablePtr drop_context = Context::createCopy(current_context);
|
|
drop_context->makeQueryContext();
|
|
if (on_error)
|
|
return drop_context;
|
|
|
|
if (auto txn = current_context->getZooKeeperMetadataTransaction())
|
|
{
|
|
/// Execute drop as separate query, because [CREATE OR] REPLACE query can be considered as
|
|
/// successfully executed after RENAME/EXCHANGE query.
|
|
drop_context->resetZooKeeperMetadataTransaction();
|
|
auto drop_txn = std::make_shared<ZooKeeperMetadataTransaction>(txn->getZooKeeper(), txn->getDatabaseZooKeeperPath(),
|
|
txn->isInitialQuery(), txn->getTaskZooKeeperPath());
|
|
drop_context->initZooKeeperMetadataTransaction(drop_txn);
|
|
}
|
|
return drop_context;
|
|
};
|
|
|
|
auto ast_drop = std::make_shared<ASTDropQuery>();
|
|
String table_to_replace_name = create.getTable();
|
|
|
|
{
|
|
auto database = DatabaseCatalog::instance().getDatabase(create.getDatabase());
|
|
if (database->getUUID() == UUIDHelpers::Nil)
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY,
|
|
"{} query is supported only for Atomic databases",
|
|
create.create_or_replace ? "CREATE OR REPLACE TABLE" : "REPLACE TABLE");
|
|
|
|
|
|
UInt64 name_hash = sipHash64(create.getDatabase() + create.getTable());
|
|
UInt16 random_suffix = thread_local_rng();
|
|
if (auto txn = current_context->getZooKeeperMetadataTransaction())
|
|
{
|
|
/// Avoid different table name on database replicas
|
|
random_suffix = sipHash64(txn->getTaskZooKeeperPath());
|
|
}
|
|
create.setTable(fmt::format("_tmp_replace_{}_{}",
|
|
getHexUIntLowercase(name_hash),
|
|
getHexUIntLowercase(random_suffix)));
|
|
|
|
ast_drop->setTable(create.getTable());
|
|
ast_drop->is_dictionary = create.is_dictionary;
|
|
ast_drop->setDatabase(create.getDatabase());
|
|
ast_drop->kind = ASTDropQuery::Drop;
|
|
}
|
|
|
|
bool created = false;
|
|
bool renamed = false;
|
|
try
|
|
{
|
|
/// Create temporary table (random name will be generated)
|
|
[[maybe_unused]] bool done = InterpreterCreateQuery(query_ptr, create_context).doCreateTable(create, properties);
|
|
assert(done);
|
|
created = true;
|
|
|
|
/// Try fill temporary table
|
|
BlockIO fill_io = fillTableIfNeeded(create);
|
|
executeTrivialBlockIO(fill_io, getContext());
|
|
|
|
/// Replace target table with created one
|
|
auto ast_rename = std::make_shared<ASTRenameQuery>();
|
|
ASTRenameQuery::Element elem
|
|
{
|
|
ASTRenameQuery::Table{create.getDatabase(), create.getTable()},
|
|
ASTRenameQuery::Table{create.getDatabase(), table_to_replace_name}
|
|
};
|
|
|
|
ast_rename->elements.push_back(std::move(elem));
|
|
ast_rename->dictionary = create.is_dictionary;
|
|
if (create.create_or_replace)
|
|
{
|
|
/// CREATE OR REPLACE TABLE
|
|
/// Will execute ordinary RENAME instead of EXCHANGE if the target table does not exist
|
|
ast_rename->rename_if_cannot_exchange = true;
|
|
ast_rename->exchange = false;
|
|
}
|
|
else
|
|
{
|
|
/// REPLACE TABLE
|
|
/// Will execute EXCHANGE query and fail if the target table does not exist
|
|
ast_rename->exchange = true;
|
|
}
|
|
|
|
InterpreterRenameQuery interpreter_rename{ast_rename, current_context};
|
|
interpreter_rename.execute();
|
|
renamed = true;
|
|
|
|
if (!interpreter_rename.renamedInsteadOfExchange())
|
|
{
|
|
/// Target table was replaced with new one, drop old table
|
|
auto drop_context = make_drop_context(false);
|
|
InterpreterDropQuery(ast_drop, drop_context).execute();
|
|
}
|
|
|
|
create.setTable(table_to_replace_name);
|
|
|
|
return {};
|
|
}
|
|
catch (...)
|
|
{
|
|
/// Drop temporary table if it was successfully created, but was not renamed to target name
|
|
if (created && !renamed)
|
|
{
|
|
auto drop_context = make_drop_context(true);
|
|
InterpreterDropQuery(ast_drop, drop_context).execute();
|
|
}
|
|
throw;
|
|
}
|
|
}
|
|
|
|
BlockIO InterpreterCreateQuery::fillTableIfNeeded(const ASTCreateQuery & create)
|
|
{
|
|
/// If the query is a CREATE SELECT, insert the data into the table.
|
|
if (create.select && !create.attach
|
|
&& !create.is_ordinary_view && !create.is_live_view && !create.is_window_view
|
|
&& (!create.is_materialized_view || create.is_populate))
|
|
{
|
|
auto insert = std::make_shared<ASTInsertQuery>();
|
|
insert->table_id = {create.getDatabase(), create.getTable(), create.uuid};
|
|
insert->select = create.select->clone();
|
|
|
|
return InterpreterInsertQuery(insert, getContext(),
|
|
getContext()->getSettingsRef().insert_allow_materialized_columns).execute();
|
|
}
|
|
|
|
return {};
|
|
}
|
|
|
|
void InterpreterCreateQuery::prepareOnClusterQuery(ASTCreateQuery & create, ContextPtr local_context, const String & cluster_name)
|
|
{
|
|
if (create.attach)
|
|
return;
|
|
|
|
/// For CREATE query generate UUID on initiator, so it will be the same on all hosts.
|
|
/// It will be ignored if database does not support UUIDs.
|
|
generateUUIDForTable(create);
|
|
|
|
/// For cross-replication cluster we cannot use UUID in replica path.
|
|
String cluster_name_expanded = local_context->getMacros()->expand(cluster_name);
|
|
ClusterPtr cluster = local_context->getCluster(cluster_name_expanded);
|
|
|
|
if (cluster->maybeCrossReplication())
|
|
{
|
|
/// Check that {uuid} macro is not used in zookeeper_path for ReplicatedMergeTree.
|
|
/// Otherwise replicas will generate different paths.
|
|
if (!create.storage)
|
|
return;
|
|
if (!create.storage->engine)
|
|
return;
|
|
if (!startsWith(create.storage->engine->name, "Replicated"))
|
|
return;
|
|
|
|
bool has_explicit_zk_path_arg = create.storage->engine->arguments &&
|
|
create.storage->engine->arguments->children.size() >= 2 &&
|
|
create.storage->engine->arguments->children[0]->as<ASTLiteral>() &&
|
|
create.storage->engine->arguments->children[0]->as<ASTLiteral>()->value.getType() == Field::Types::String;
|
|
|
|
if (has_explicit_zk_path_arg)
|
|
{
|
|
String zk_path = create.storage->engine->arguments->children[0]->as<ASTLiteral>()->value.get<String>();
|
|
Macros::MacroExpansionInfo info;
|
|
info.table_id.uuid = create.uuid;
|
|
info.ignore_unknown = true;
|
|
local_context->getMacros()->expand(zk_path, info);
|
|
if (!info.expanded_uuid)
|
|
return;
|
|
}
|
|
|
|
throw Exception("Seems like cluster is configured for cross-replication, "
|
|
"but zookeeper_path for ReplicatedMergeTree is not specified or contains {uuid} macro. "
|
|
"It's not supported for cross replication, because tables must have different UUIDs. "
|
|
"Please specify unique zookeeper_path explicitly.", ErrorCodes::INCORRECT_QUERY);
|
|
}
|
|
}
|
|
|
|
BlockIO InterpreterCreateQuery::execute()
|
|
{
|
|
FunctionNameNormalizer().visit(query_ptr.get());
|
|
auto & create = query_ptr->as<ASTCreateQuery &>();
|
|
if (!create.cluster.empty())
|
|
{
|
|
prepareOnClusterQuery(create, getContext(), create.cluster);
|
|
DDLQueryOnClusterParams params;
|
|
params.access_to_check = getRequiredAccess();
|
|
return executeDDLQueryOnCluster(query_ptr, getContext(), params);
|
|
}
|
|
|
|
getContext()->checkAccess(getRequiredAccess());
|
|
|
|
ASTQueryWithOutput::resetOutputASTIfExist(create);
|
|
|
|
/// CREATE|ATTACH DATABASE
|
|
if (create.database && !create.table)
|
|
return createDatabase(create);
|
|
else
|
|
return createTable(create);
|
|
}
|
|
|
|
|
|
AccessRightsElements InterpreterCreateQuery::getRequiredAccess() const
|
|
{
|
|
/// Internal queries (initiated by the server itself) always have access to everything.
|
|
if (internal)
|
|
return {};
|
|
|
|
AccessRightsElements required_access;
|
|
const auto & create = query_ptr->as<const ASTCreateQuery &>();
|
|
|
|
if (!create.table)
|
|
{
|
|
required_access.emplace_back(AccessType::CREATE_DATABASE, create.getDatabase());
|
|
}
|
|
else if (create.is_dictionary)
|
|
{
|
|
required_access.emplace_back(AccessType::CREATE_DICTIONARY, create.getDatabase(), create.getTable());
|
|
}
|
|
else if (create.isView())
|
|
{
|
|
assert(!create.temporary);
|
|
if (create.replace_view)
|
|
required_access.emplace_back(AccessType::DROP_VIEW | AccessType::CREATE_VIEW, create.getDatabase(), create.getTable());
|
|
else
|
|
required_access.emplace_back(AccessType::CREATE_VIEW, create.getDatabase(), create.getTable());
|
|
}
|
|
else
|
|
{
|
|
if (create.temporary)
|
|
required_access.emplace_back(AccessType::CREATE_TEMPORARY_TABLE);
|
|
else
|
|
{
|
|
if (create.replace_table)
|
|
required_access.emplace_back(AccessType::DROP_TABLE, create.getDatabase(), create.getTable());
|
|
required_access.emplace_back(AccessType::CREATE_TABLE, create.getDatabase(), create.getTable());
|
|
}
|
|
}
|
|
|
|
if (create.to_table_id)
|
|
required_access.emplace_back(AccessType::SELECT | AccessType::INSERT, create.to_table_id.database_name, create.to_table_id.table_name);
|
|
|
|
if (create.storage && create.storage->engine)
|
|
{
|
|
auto source_access_type = StorageFactory::instance().getSourceAccessType(create.storage->engine->name);
|
|
if (source_access_type != AccessType::NONE)
|
|
required_access.emplace_back(source_access_type);
|
|
}
|
|
|
|
return required_access;
|
|
}
|
|
|
|
void InterpreterCreateQuery::extendQueryLogElemImpl(QueryLogElement & elem, const ASTPtr &, ContextPtr) const
|
|
{
|
|
elem.query_kind = "Create";
|
|
if (!as_table_saved.empty())
|
|
{
|
|
String database = backQuoteIfNeed(as_database_saved.empty() ? getContext()->getCurrentDatabase() : as_database_saved);
|
|
elem.query_databases.insert(database);
|
|
elem.query_tables.insert(database + "." + backQuoteIfNeed(as_table_saved));
|
|
}
|
|
}
|
|
|
|
void InterpreterCreateQuery::addColumnsDescriptionToCreateQueryIfNecessary(ASTCreateQuery & create, const StoragePtr & storage)
|
|
{
|
|
if (create.is_dictionary || (create.columns_list && create.columns_list->columns && !create.columns_list->columns->children.empty()))
|
|
return;
|
|
|
|
auto ast_storage = std::make_shared<ASTStorage>();
|
|
auto query_from_storage = DB::getCreateQueryFromStorage(storage, ast_storage, false,
|
|
getContext()->getSettingsRef().max_parser_depth, true);
|
|
auto & create_query_from_storage = query_from_storage->as<ASTCreateQuery &>();
|
|
|
|
if (!create.columns_list)
|
|
{
|
|
ASTPtr columns_list = std::make_shared<ASTColumns>(*create_query_from_storage.columns_list);
|
|
create.set(create.columns_list, columns_list);
|
|
}
|
|
else
|
|
{
|
|
ASTPtr columns = std::make_shared<ASTExpressionList>(*create_query_from_storage.columns_list->columns);
|
|
create.columns_list->set(create.columns_list->columns, columns);
|
|
}
|
|
}
|
|
|
|
}
|