mirror of
https://github.com/ClickHouse/ClickHouse.git
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913 lines
39 KiB
C++
913 lines
39 KiB
C++
#pragma once
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#include <Core/Block.h>
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#include <Core/NamesAndTypes.h>
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#include <Core/Settings.h>
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#include <Core/UUID.h>
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#include <Interpreters/ClientInfo.h>
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#include <Interpreters/Context_fwd.h>
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#include <Interpreters/DatabaseCatalog.h>
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#include <Parsers/IAST_fwd.h>
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#include <Storages/IStorage_fwd.h>
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#include <Common/MultiVersion.h>
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#include <Common/OpenTelemetryTraceContext.h>
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#include <Common/RemoteHostFilter.h>
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#include <Common/isLocalAddress.h>
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#include <base/types.h>
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#include <Storages/MergeTree/ParallelReplicasReadingCoordinator.h>
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#include "config_core.h"
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#include <boost/container/flat_set.hpp>
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#include <functional>
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#include <memory>
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#include <mutex>
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#include <optional>
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#include <exception>
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namespace Poco::Net { class IPAddress; }
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namespace zkutil { class ZooKeeper; }
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namespace DB
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{
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struct ContextSharedPart;
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class ContextAccess;
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struct User;
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using UserPtr = std::shared_ptr<const User>;
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struct EnabledRolesInfo;
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class EnabledRowPolicies;
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class EnabledQuota;
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struct QuotaUsage;
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class AccessFlags;
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struct AccessRightsElement;
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class AccessRightsElements;
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enum class RowPolicyFilterType;
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class EmbeddedDictionaries;
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class ExternalDictionariesLoader;
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class ExternalModelsLoader;
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class ExternalUserDefinedExecutableFunctionsLoader;
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class InterserverCredentials;
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using InterserverCredentialsPtr = std::shared_ptr<const InterserverCredentials>;
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class InterserverIOHandler;
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class BackgroundSchedulePool;
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class MergeList;
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class ReplicatedFetchList;
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class Cluster;
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class Compiler;
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class MarkCache;
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class MMappedFileCache;
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class UncompressedCache;
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class ProcessList;
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class QueryStatus;
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class Macros;
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struct Progress;
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struct FileProgress;
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class Clusters;
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class QueryLog;
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class QueryThreadLog;
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class QueryViewsLog;
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class PartLog;
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class TextLog;
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class TraceLog;
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class MetricLog;
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class AsynchronousMetricLog;
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class OpenTelemetrySpanLog;
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class ZooKeeperLog;
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class SessionLog;
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struct MergeTreeSettings;
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class StorageS3Settings;
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class IDatabase;
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class DDLWorker;
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class ITableFunction;
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class Block;
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class ActionLocksManager;
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using ActionLocksManagerPtr = std::shared_ptr<ActionLocksManager>;
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class ShellCommand;
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class ICompressionCodec;
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class AccessControl;
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class Credentials;
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class GSSAcceptorContext;
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struct SettingsConstraintsAndProfileIDs;
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class RemoteHostFilter;
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struct StorageID;
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class IDisk;
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using DiskPtr = std::shared_ptr<IDisk>;
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class DiskSelector;
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using DiskSelectorPtr = std::shared_ptr<const DiskSelector>;
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using DisksMap = std::map<String, DiskPtr>;
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class IStoragePolicy;
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using StoragePolicyPtr = std::shared_ptr<const IStoragePolicy>;
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using StoragePoliciesMap = std::map<String, StoragePolicyPtr>;
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class StoragePolicySelector;
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using StoragePolicySelectorPtr = std::shared_ptr<const StoragePolicySelector>;
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template <class Queue>
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class MergeTreeBackgroundExecutor;
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class MergeMutateRuntimeQueue;
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class OrdinaryRuntimeQueue;
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using MergeMutateBackgroundExecutor = MergeTreeBackgroundExecutor<MergeMutateRuntimeQueue>;
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using MergeMutateBackgroundExecutorPtr = std::shared_ptr<MergeMutateBackgroundExecutor>;
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using OrdinaryBackgroundExecutor = MergeTreeBackgroundExecutor<OrdinaryRuntimeQueue>;
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using OrdinaryBackgroundExecutorPtr = std::shared_ptr<OrdinaryBackgroundExecutor>;
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struct PartUUIDs;
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using PartUUIDsPtr = std::shared_ptr<PartUUIDs>;
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class KeeperDispatcher;
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class Session;
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class IInputFormat;
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class IOutputFormat;
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using InputFormatPtr = std::shared_ptr<IInputFormat>;
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using OutputFormatPtr = std::shared_ptr<IOutputFormat>;
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class IVolume;
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using VolumePtr = std::shared_ptr<IVolume>;
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struct NamedSession;
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struct BackgroundTaskSchedulingSettings;
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#if USE_NLP
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class SynonymsExtensions;
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class Lemmatizers;
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#endif
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class Throttler;
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using ThrottlerPtr = std::shared_ptr<Throttler>;
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class ZooKeeperMetadataTransaction;
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using ZooKeeperMetadataTransactionPtr = std::shared_ptr<ZooKeeperMetadataTransaction>;
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class AsynchronousInsertQueue;
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/// Callback for external tables initializer
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using ExternalTablesInitializer = std::function<void(ContextPtr)>;
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/// Callback for initialize input()
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using InputInitializer = std::function<void(ContextPtr, const StoragePtr &)>;
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/// Callback for reading blocks of data from client for function input()
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using InputBlocksReader = std::function<Block(ContextPtr)>;
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/// Used in distributed task processing
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using ReadTaskCallback = std::function<String()>;
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using MergeTreeReadTaskCallback = std::function<std::optional<PartitionReadResponse>(PartitionReadRequest)>;
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/// An empty interface for an arbitrary object that may be attached by a shared pointer
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/// to query context, when using ClickHouse as a library.
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struct IHostContext
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{
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virtual ~IHostContext() = default;
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};
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using IHostContextPtr = std::shared_ptr<IHostContext>;
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/// A small class which owns ContextShared.
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/// We don't use something like unique_ptr directly to allow ContextShared type to be incomplete.
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struct SharedContextHolder
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{
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~SharedContextHolder();
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SharedContextHolder();
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explicit SharedContextHolder(std::unique_ptr<ContextSharedPart> shared_context);
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SharedContextHolder(SharedContextHolder &&) noexcept;
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SharedContextHolder & operator=(SharedContextHolder &&);
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ContextSharedPart * get() const { return shared.get(); }
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void reset();
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private:
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std::unique_ptr<ContextSharedPart> shared;
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};
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/** A set of known objects that can be used in the query.
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* Consists of a shared part (always common to all sessions and queries)
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* and copied part (which can be its own for each session or query).
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*
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* Everything is encapsulated for all sorts of checks and locks.
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*/
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class Context: public std::enable_shared_from_this<Context>
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{
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private:
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ContextSharedPart * shared;
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ClientInfo client_info;
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ExternalTablesInitializer external_tables_initializer_callback;
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InputInitializer input_initializer_callback;
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InputBlocksReader input_blocks_reader;
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std::optional<UUID> user_id;
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std::shared_ptr<std::vector<UUID>> current_roles;
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std::shared_ptr<const SettingsConstraintsAndProfileIDs> settings_constraints_and_current_profiles;
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std::shared_ptr<const ContextAccess> access;
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std::shared_ptr<const EnabledRowPolicies> row_policies_of_initial_user;
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String current_database;
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Settings settings; /// Setting for query execution.
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using ProgressCallback = std::function<void(const Progress & progress)>;
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ProgressCallback progress_callback; /// Callback for tracking progress of query execution.
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using FileProgressCallback = std::function<void(const FileProgress & progress)>;
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FileProgressCallback file_progress_callback; /// Callback for tracking progress of file loading.
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QueryStatus * process_list_elem = nullptr; /// For tracking total resource usage for query.
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StorageID insertion_table = StorageID::createEmpty(); /// Saved insertion table in query context
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bool is_distributed = false; /// Whether the current context it used for distributed query
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String default_format; /// Format, used when server formats data by itself and if query does not have FORMAT specification.
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/// Thus, used in HTTP interface. If not specified - then some globally default format is used.
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TemporaryTablesMapping external_tables_mapping;
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Scalars scalars;
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Scalars local_scalars;
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/// Used in s3Cluster table function. With this callback, a worker node could ask an initiator
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/// about next file to read from s3.
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std::optional<ReadTaskCallback> next_task_callback;
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/// Used in parallel reading from replicas. A replica tells about its intentions to read
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/// some ranges from some part and initiator will tell the replica about whether it is accepted or denied.
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std::optional<MergeTreeReadTaskCallback> merge_tree_read_task_callback;
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/// Record entities accessed by current query, and store this information in system.query_log.
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struct QueryAccessInfo
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{
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QueryAccessInfo() = default;
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QueryAccessInfo(const QueryAccessInfo & rhs)
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{
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std::lock_guard<std::mutex> lock(rhs.mutex);
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databases = rhs.databases;
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tables = rhs.tables;
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columns = rhs.columns;
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projections = rhs.projections;
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views = rhs.views;
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}
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QueryAccessInfo(QueryAccessInfo && rhs) = delete;
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QueryAccessInfo & operator=(QueryAccessInfo rhs)
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{
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swap(rhs);
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return *this;
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}
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void swap(QueryAccessInfo & rhs)
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{
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std::swap(databases, rhs.databases);
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std::swap(tables, rhs.tables);
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std::swap(columns, rhs.columns);
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std::swap(projections, rhs.projections);
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std::swap(views, rhs.views);
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}
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/// To prevent a race between copy-constructor and other uses of this structure.
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mutable std::mutex mutex{};
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std::set<std::string> databases{};
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std::set<std::string> tables{};
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std::set<std::string> columns{};
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std::set<std::string> projections{};
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std::set<std::string> views{};
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};
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QueryAccessInfo query_access_info;
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/// Record names of created objects of factories (for testing, etc)
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struct QueryFactoriesInfo
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{
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std::unordered_set<std::string> aggregate_functions;
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std::unordered_set<std::string> aggregate_function_combinators;
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std::unordered_set<std::string> database_engines;
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std::unordered_set<std::string> data_type_families;
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std::unordered_set<std::string> dictionaries;
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std::unordered_set<std::string> formats;
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std::unordered_set<std::string> functions;
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std::unordered_set<std::string> storages;
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std::unordered_set<std::string> table_functions;
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};
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/// Needs to be chandged while having const context in factories methods
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mutable QueryFactoriesInfo query_factories_info;
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/// TODO: maybe replace with temporary tables?
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StoragePtr view_source; /// Temporary StorageValues used to generate alias columns for materialized views
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Tables table_function_results; /// Temporary tables obtained by execution of table functions. Keyed by AST tree id.
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ContextWeakMutablePtr query_context;
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ContextWeakMutablePtr session_context; /// Session context or nullptr. Could be equal to this.
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ContextWeakMutablePtr global_context; /// Global context. Could be equal to this.
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/// XXX: move this stuff to shared part instead.
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ContextMutablePtr buffer_context; /// Buffer context. Could be equal to this.
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/// A flag, used to distinguish between user query and internal query to a database engine (MaterializedPostgreSQL).
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bool is_internal_query = false;
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public:
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// Top-level OpenTelemetry trace context for the query. Makes sense only for a query context.
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OpenTelemetryTraceContext query_trace_context;
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private:
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using SampleBlockCache = std::unordered_map<std::string, Block>;
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mutable SampleBlockCache sample_block_cache;
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PartUUIDsPtr part_uuids; /// set of parts' uuids, is used for query parts deduplication
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PartUUIDsPtr ignored_part_uuids; /// set of parts' uuids are meant to be excluded from query processing
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NameToNameMap query_parameters; /// Dictionary with query parameters for prepared statements.
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/// (key=name, value)
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IHostContextPtr host_context; /// Arbitrary object that may used to attach some host specific information to query context,
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/// when using ClickHouse as a library in some project. For example, it may contain host
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/// logger, some query identification information, profiling guards, etc. This field is
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/// to be customized in HTTP and TCP servers by overloading the customizeContext(DB::ContextPtr)
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/// methods.
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ZooKeeperMetadataTransactionPtr metadata_transaction; /// Distributed DDL context. I'm not sure if it's a suitable place for this,
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/// but it's the easiest way to pass this through the whole stack from executeQuery(...)
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/// to DatabaseOnDisk::commitCreateTable(...) or IStorage::alter(...) without changing
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/// thousands of signatures.
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/// And I hope it will be replaced with more common Transaction sometime.
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Context();
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Context(const Context &);
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Context & operator=(const Context &);
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public:
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/// Create initial Context with ContextShared and etc.
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static ContextMutablePtr createGlobal(ContextSharedPart * shared);
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static ContextMutablePtr createCopy(const ContextWeakPtr & other);
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static ContextMutablePtr createCopy(const ContextMutablePtr & other);
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static ContextMutablePtr createCopy(const ContextPtr & other);
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static SharedContextHolder createShared();
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~Context();
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String getPath() const;
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String getFlagsPath() const;
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String getUserFilesPath() const;
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String getDictionariesLibPath() const;
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String getUserScriptsPath() const;
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/// A list of warnings about server configuration to place in `system.warnings` table.
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Strings getWarnings() const;
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VolumePtr getTemporaryVolume() const;
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void setPath(const String & path);
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void setFlagsPath(const String & path);
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void setUserFilesPath(const String & path);
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void setDictionariesLibPath(const String & path);
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void setUserScriptsPath(const String & path);
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void addWarningMessage(const String & msg);
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VolumePtr setTemporaryStorage(const String & path, const String & policy_name = "");
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using ConfigurationPtr = Poco::AutoPtr<Poco::Util::AbstractConfiguration>;
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/// Global application configuration settings.
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void setConfig(const ConfigurationPtr & config);
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const Poco::Util::AbstractConfiguration & getConfigRef() const;
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AccessControl & getAccessControl();
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const AccessControl & getAccessControl() const;
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/// Sets external authenticators config (LDAP, Kerberos).
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void setExternalAuthenticatorsConfig(const Poco::Util::AbstractConfiguration & config);
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/// Creates GSSAcceptorContext instance based on external authenticator params.
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std::unique_ptr<GSSAcceptorContext> makeGSSAcceptorContext() const;
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/** Take the list of users, quotas and configuration profiles from this config.
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* The list of users is completely replaced.
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* The accumulated quota values are not reset if the quota is not deleted.
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*/
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void setUsersConfig(const ConfigurationPtr & config);
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ConfigurationPtr getUsersConfig();
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/// Sets the current user assuming that he/she is already authenticated.
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/// WARNING: This function doesn't check password!
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void setUser(const UUID & user_id_);
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UserPtr getUser() const;
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String getUserName() const;
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std::optional<UUID> getUserID() const;
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void setQuotaKey(String quota_key_);
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void setCurrentRoles(const std::vector<UUID> & current_roles_);
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void setCurrentRolesDefault();
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boost::container::flat_set<UUID> getCurrentRoles() const;
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boost::container::flat_set<UUID> getEnabledRoles() const;
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std::shared_ptr<const EnabledRolesInfo> getRolesInfo() const;
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void setCurrentProfile(const String & profile_name);
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void setCurrentProfile(const UUID & profile_id);
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std::vector<UUID> getCurrentProfiles() const;
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std::vector<UUID> getEnabledProfiles() const;
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/// Checks access rights.
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/// Empty database means the current database.
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void checkAccess(const AccessFlags & flags) const;
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void checkAccess(const AccessFlags & flags, const std::string_view & database) const;
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void checkAccess(const AccessFlags & flags, const std::string_view & database, const std::string_view & table) const;
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void checkAccess(const AccessFlags & flags, const std::string_view & database, const std::string_view & table, const std::string_view & column) const;
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void checkAccess(const AccessFlags & flags, const std::string_view & database, const std::string_view & table, const std::vector<std::string_view> & columns) const;
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void checkAccess(const AccessFlags & flags, const std::string_view & database, const std::string_view & table, const Strings & columns) const;
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void checkAccess(const AccessFlags & flags, const StorageID & table_id) const;
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void checkAccess(const AccessFlags & flags, const StorageID & table_id, const std::string_view & column) const;
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void checkAccess(const AccessFlags & flags, const StorageID & table_id, const std::vector<std::string_view> & columns) const;
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void checkAccess(const AccessFlags & flags, const StorageID & table_id, const Strings & columns) const;
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void checkAccess(const AccessRightsElement & element) const;
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void checkAccess(const AccessRightsElements & elements) const;
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std::shared_ptr<const ContextAccess> getAccess() const;
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ASTPtr getRowPolicyFilter(const String & database, const String & table_name, RowPolicyFilterType filter_type) const;
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/// Finds and sets extra row policies to be used based on `client_info.initial_user`,
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/// if the initial user exists.
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/// TODO: we need a better solution here. It seems we should pass the initial row policy
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/// because a shard is allowed to not have the initial user or it might be another user
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/// with the same name.
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void enableRowPoliciesOfInitialUser();
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std::shared_ptr<const EnabledQuota> getQuota() const;
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std::optional<QuotaUsage> getQuotaUsage() const;
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/// We have to copy external tables inside executeQuery() to track limits. Therefore, set callback for it. Must set once.
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void setExternalTablesInitializer(ExternalTablesInitializer && initializer);
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/// This method is called in executeQuery() and will call the external tables initializer.
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void initializeExternalTablesIfSet();
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/// When input() is present we have to send columns structure to client
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void setInputInitializer(InputInitializer && initializer);
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/// This method is called in StorageInput::read while executing query
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void initializeInput(const StoragePtr & input_storage);
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/// Callback for read data blocks from client one by one for function input()
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void setInputBlocksReaderCallback(InputBlocksReader && reader);
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/// Get callback for reading data for input()
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InputBlocksReader getInputBlocksReaderCallback() const;
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void resetInputCallbacks();
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ClientInfo & getClientInfo() { return client_info; }
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const ClientInfo & getClientInfo() const { return client_info; }
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enum StorageNamespace
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{
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ResolveGlobal = 1u, /// Database name must be specified
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ResolveCurrentDatabase = 2u, /// Use current database
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ResolveOrdinary = ResolveGlobal | ResolveCurrentDatabase, /// If database name is not specified, use current database
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ResolveExternal = 4u, /// Try get external table
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ResolveAll = ResolveExternal | ResolveOrdinary /// If database name is not specified, try get external table,
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/// if external table not found use current database.
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};
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String resolveDatabase(const String & database_name) const;
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StorageID resolveStorageID(StorageID storage_id, StorageNamespace where = StorageNamespace::ResolveAll) const;
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StorageID tryResolveStorageID(StorageID storage_id, StorageNamespace where = StorageNamespace::ResolveAll) const;
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StorageID resolveStorageIDImpl(StorageID storage_id, StorageNamespace where, std::optional<Exception> * exception) const;
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Tables getExternalTables() const;
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void addExternalTable(const String & table_name, TemporaryTableHolder && temporary_table);
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std::shared_ptr<TemporaryTableHolder> removeExternalTable(const String & table_name);
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const Scalars & getScalars() const;
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const Block & getScalar(const String & name) const;
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void addScalar(const String & name, const Block & block);
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bool hasScalar(const String & name) const;
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const Block * tryGetLocalScalar(const String & name) const;
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void addLocalScalar(const String & name, const Block & block);
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|
const QueryAccessInfo & getQueryAccessInfo() const { return query_access_info; }
|
|
void addQueryAccessInfo(
|
|
const String & quoted_database_name,
|
|
const String & full_quoted_table_name,
|
|
const Names & column_names,
|
|
const String & projection_name = {},
|
|
const String & view_name = {});
|
|
|
|
|
|
/// Supported factories for records in query_log
|
|
enum class QueryLogFactories
|
|
{
|
|
AggregateFunction,
|
|
AggregateFunctionCombinator,
|
|
Database,
|
|
DataType,
|
|
Dictionary,
|
|
Format,
|
|
Function,
|
|
Storage,
|
|
TableFunction
|
|
};
|
|
|
|
const QueryFactoriesInfo & getQueryFactoriesInfo() const { return query_factories_info; }
|
|
void addQueryFactoriesInfo(QueryLogFactories factory_type, const String & created_object) const;
|
|
|
|
StoragePtr executeTableFunction(const ASTPtr & table_expression);
|
|
|
|
void addViewSource(const StoragePtr & storage);
|
|
StoragePtr getViewSource() const;
|
|
|
|
String getCurrentDatabase() const;
|
|
String getCurrentQueryId() const { return client_info.current_query_id; }
|
|
|
|
/// Id of initiating query for distributed queries; or current query id if it's not a distributed query.
|
|
String getInitialQueryId() const;
|
|
|
|
void setCurrentDatabase(const String & name);
|
|
/// Set current_database for global context. We don't validate that database
|
|
/// exists because it should be set before databases loading.
|
|
void setCurrentDatabaseNameInGlobalContext(const String & name);
|
|
void setCurrentQueryId(const String & query_id);
|
|
|
|
void killCurrentQuery();
|
|
|
|
void setInsertionTable(StorageID db_and_table) { insertion_table = std::move(db_and_table); }
|
|
const StorageID & getInsertionTable() const { return insertion_table; }
|
|
|
|
void setDistributed(bool is_distributed_) { is_distributed = is_distributed_; }
|
|
bool isDistributed() const { return is_distributed; }
|
|
|
|
String getDefaultFormat() const; /// If default_format is not specified, some global default format is returned.
|
|
void setDefaultFormat(const String & name);
|
|
|
|
MultiVersion<Macros>::Version getMacros() const;
|
|
void setMacros(std::unique_ptr<Macros> && macros);
|
|
|
|
Settings getSettings() const;
|
|
void setSettings(const Settings & settings_);
|
|
|
|
/// Set settings by name.
|
|
void setSetting(const StringRef & name, const String & value);
|
|
void setSetting(const StringRef & name, const Field & value);
|
|
void applySettingChange(const SettingChange & change);
|
|
void applySettingsChanges(const SettingsChanges & changes);
|
|
|
|
/// Checks the constraints.
|
|
void checkSettingsConstraints(const SettingChange & change) const;
|
|
void checkSettingsConstraints(const SettingsChanges & changes) const;
|
|
void checkSettingsConstraints(SettingsChanges & changes) const;
|
|
void clampToSettingsConstraints(SettingsChanges & changes) const;
|
|
|
|
/// Returns the current constraints (can return null).
|
|
std::shared_ptr<const SettingsConstraintsAndProfileIDs> getSettingsConstraintsAndCurrentProfiles() const;
|
|
|
|
const EmbeddedDictionaries & getEmbeddedDictionaries() const;
|
|
const ExternalDictionariesLoader & getExternalDictionariesLoader() const;
|
|
const ExternalModelsLoader & getExternalModelsLoader() const;
|
|
const ExternalUserDefinedExecutableFunctionsLoader & getExternalUserDefinedExecutableFunctionsLoader() const;
|
|
EmbeddedDictionaries & getEmbeddedDictionaries();
|
|
ExternalDictionariesLoader & getExternalDictionariesLoader();
|
|
ExternalDictionariesLoader & getExternalDictionariesLoaderUnlocked();
|
|
ExternalUserDefinedExecutableFunctionsLoader & getExternalUserDefinedExecutableFunctionsLoader();
|
|
ExternalUserDefinedExecutableFunctionsLoader & getExternalUserDefinedExecutableFunctionsLoaderUnlocked();
|
|
ExternalModelsLoader & getExternalModelsLoader();
|
|
ExternalModelsLoader & getExternalModelsLoaderUnlocked();
|
|
void tryCreateEmbeddedDictionaries(const Poco::Util::AbstractConfiguration & config) const;
|
|
void loadOrReloadDictionaries(const Poco::Util::AbstractConfiguration & config);
|
|
void loadOrReloadUserDefinedExecutableFunctions(const Poco::Util::AbstractConfiguration & config);
|
|
void loadOrReloadModels(const Poco::Util::AbstractConfiguration & config);
|
|
|
|
#if USE_NLP
|
|
SynonymsExtensions & getSynonymsExtensions() const;
|
|
Lemmatizers & getLemmatizers() const;
|
|
#endif
|
|
|
|
/// I/O formats.
|
|
InputFormatPtr getInputFormat(const String & name, ReadBuffer & buf, const Block & sample, UInt64 max_block_size, const std::optional<FormatSettings> & format_settings = std::nullopt) const;
|
|
|
|
OutputFormatPtr getOutputFormat(const String & name, WriteBuffer & buf, const Block & sample) const;
|
|
OutputFormatPtr getOutputFormatParallelIfPossible(const String & name, WriteBuffer & buf, const Block & sample) const;
|
|
|
|
InterserverIOHandler & getInterserverIOHandler();
|
|
|
|
/// How other servers can access this for downloading replicated data.
|
|
void setInterserverIOAddress(const String & host, UInt16 port);
|
|
std::pair<String, UInt16> getInterserverIOAddress() const;
|
|
|
|
/// Credentials which server will use to communicate with others
|
|
void updateInterserverCredentials(const Poco::Util::AbstractConfiguration & config);
|
|
InterserverCredentialsPtr getInterserverCredentials();
|
|
|
|
/// Interserver requests scheme (http or https)
|
|
void setInterserverScheme(const String & scheme);
|
|
String getInterserverScheme() const;
|
|
|
|
/// Storage of allowed hosts from config.xml
|
|
void setRemoteHostFilter(const Poco::Util::AbstractConfiguration & config);
|
|
const RemoteHostFilter & getRemoteHostFilter() const;
|
|
|
|
/// The port that the server listens for executing SQL queries.
|
|
UInt16 getTCPPort() const;
|
|
|
|
std::optional<UInt16> getTCPPortSecure() const;
|
|
|
|
/// Register server ports during server starting up. No lock is held.
|
|
void registerServerPort(String port_name, UInt16 port);
|
|
|
|
UInt16 getServerPort(const String & port_name) const;
|
|
|
|
/// For methods below you may need to acquire the context lock by yourself.
|
|
|
|
ContextMutablePtr getQueryContext() const;
|
|
bool hasQueryContext() const { return !query_context.expired(); }
|
|
bool isInternalSubquery() const;
|
|
|
|
ContextMutablePtr getSessionContext() const;
|
|
bool hasSessionContext() const { return !session_context.expired(); }
|
|
|
|
ContextMutablePtr getGlobalContext() const;
|
|
|
|
bool hasGlobalContext() const { return !global_context.expired(); }
|
|
bool isGlobalContext() const
|
|
{
|
|
auto ptr = global_context.lock();
|
|
return ptr && ptr.get() == this;
|
|
}
|
|
|
|
ContextMutablePtr getBufferContext() const;
|
|
|
|
void setQueryContext(ContextMutablePtr context_) { query_context = context_; }
|
|
void setSessionContext(ContextMutablePtr context_) { session_context = context_; }
|
|
|
|
void makeQueryContext() { query_context = shared_from_this(); }
|
|
void makeSessionContext() { session_context = shared_from_this(); }
|
|
void makeGlobalContext() { initGlobal(); global_context = shared_from_this(); }
|
|
|
|
const Settings & getSettingsRef() const { return settings; }
|
|
|
|
void setProgressCallback(ProgressCallback callback);
|
|
/// Used in executeQuery() to pass it to the QueryPipeline.
|
|
ProgressCallback getProgressCallback() const;
|
|
|
|
void setFileProgressCallback(FileProgressCallback && callback) { file_progress_callback = callback; }
|
|
FileProgressCallback getFileProgressCallback() const { return file_progress_callback; }
|
|
|
|
/** Set in executeQuery and InterpreterSelectQuery. Then it is used in QueryPipeline,
|
|
* to update and monitor information about the total number of resources spent for the query.
|
|
*/
|
|
void setProcessListElement(QueryStatus * elem);
|
|
/// Can return nullptr if the query was not inserted into the ProcessList.
|
|
QueryStatus * getProcessListElement() const;
|
|
|
|
/// List all queries.
|
|
ProcessList & getProcessList();
|
|
const ProcessList & getProcessList() const;
|
|
|
|
MergeList & getMergeList();
|
|
const MergeList & getMergeList() const;
|
|
|
|
ReplicatedFetchList & getReplicatedFetchList();
|
|
const ReplicatedFetchList & getReplicatedFetchList() const;
|
|
|
|
/// If the current session is expired at the time of the call, synchronously creates and returns a new session with the startNewSession() call.
|
|
/// If no ZooKeeper configured, throws an exception.
|
|
std::shared_ptr<zkutil::ZooKeeper> getZooKeeper() const;
|
|
/// Same as above but return a zookeeper connection from auxiliary_zookeepers configuration entry.
|
|
std::shared_ptr<zkutil::ZooKeeper> getAuxiliaryZooKeeper(const String & name) const;
|
|
|
|
/// Try to connect to Keeper using get(Auxiliary)ZooKeeper. Useful for
|
|
/// internal Keeper start (check connection to some other node). Return true
|
|
/// if connected successfully (without exception) or our zookeeper client
|
|
/// connection configured for some other cluster without our node.
|
|
bool tryCheckClientConnectionToMyKeeperCluster() const;
|
|
|
|
UInt32 getZooKeeperSessionUptime() const;
|
|
|
|
#if USE_NURAFT
|
|
std::shared_ptr<KeeperDispatcher> & getKeeperDispatcher() const;
|
|
#endif
|
|
void initializeKeeperDispatcher(bool start_async) const;
|
|
void shutdownKeeperDispatcher() const;
|
|
void updateKeeperConfiguration(const Poco::Util::AbstractConfiguration & config);
|
|
|
|
/// Set auxiliary zookeepers configuration at server starting or configuration reloading.
|
|
void reloadAuxiliaryZooKeepersConfigIfChanged(const ConfigurationPtr & config);
|
|
/// Has ready or expired ZooKeeper
|
|
bool hasZooKeeper() const;
|
|
/// Has ready or expired auxiliary ZooKeeper
|
|
bool hasAuxiliaryZooKeeper(const String & name) const;
|
|
/// Reset current zookeeper session. Do not create a new one.
|
|
void resetZooKeeper() const;
|
|
// Reload Zookeeper
|
|
void reloadZooKeeperIfChanged(const ConfigurationPtr & config) const;
|
|
|
|
void setSystemZooKeeperLogAfterInitializationIfNeeded();
|
|
|
|
/// Create a cache of uncompressed blocks of specified size. This can be done only once.
|
|
void setUncompressedCache(size_t max_size_in_bytes);
|
|
std::shared_ptr<UncompressedCache> getUncompressedCache() const;
|
|
void dropUncompressedCache() const;
|
|
|
|
/// Create a cache of marks of specified size. This can be done only once.
|
|
void setMarkCache(size_t cache_size_in_bytes);
|
|
std::shared_ptr<MarkCache> getMarkCache() const;
|
|
void dropMarkCache() const;
|
|
|
|
/// Create a cache of index uncompressed blocks of specified size. This can be done only once.
|
|
void setIndexUncompressedCache(size_t max_size_in_bytes);
|
|
std::shared_ptr<UncompressedCache> getIndexUncompressedCache() const;
|
|
void dropIndexUncompressedCache() const;
|
|
|
|
/// Create a cache of index marks of specified size. This can be done only once.
|
|
void setIndexMarkCache(size_t cache_size_in_bytes);
|
|
std::shared_ptr<MarkCache> getIndexMarkCache() const;
|
|
void dropIndexMarkCache() const;
|
|
|
|
/// Create a cache of mapped files to avoid frequent open/map/unmap/close and to reuse from several threads.
|
|
void setMMappedFileCache(size_t cache_size_in_num_entries);
|
|
std::shared_ptr<MMappedFileCache> getMMappedFileCache() const;
|
|
void dropMMappedFileCache() const;
|
|
|
|
/** Clear the caches of the uncompressed blocks and marks.
|
|
* This is usually done when renaming tables, changing the type of columns, deleting a table.
|
|
* - since caches are linked to file names, and become incorrect.
|
|
* (when deleting a table - it is necessary, since in its place another can appear)
|
|
* const - because the change in the cache is not considered significant.
|
|
*/
|
|
void dropCaches() const;
|
|
|
|
/// Settings for MergeTree background tasks stored in config.xml
|
|
BackgroundTaskSchedulingSettings getBackgroundProcessingTaskSchedulingSettings() const;
|
|
BackgroundTaskSchedulingSettings getBackgroundMoveTaskSchedulingSettings() const;
|
|
|
|
BackgroundSchedulePool & getBufferFlushSchedulePool() const;
|
|
BackgroundSchedulePool & getSchedulePool() const;
|
|
BackgroundSchedulePool & getMessageBrokerSchedulePool() const;
|
|
BackgroundSchedulePool & getDistributedSchedulePool() const;
|
|
|
|
ThrottlerPtr getReplicatedFetchesThrottler() const;
|
|
ThrottlerPtr getReplicatedSendsThrottler() const;
|
|
|
|
/// Has distributed_ddl configuration or not.
|
|
bool hasDistributedDDL() const;
|
|
void setDDLWorker(std::unique_ptr<DDLWorker> ddl_worker);
|
|
DDLWorker & getDDLWorker() const;
|
|
|
|
std::shared_ptr<Clusters> getClusters() const;
|
|
std::shared_ptr<Cluster> getCluster(const std::string & cluster_name) const;
|
|
std::shared_ptr<Cluster> tryGetCluster(const std::string & cluster_name) const;
|
|
void setClustersConfig(const ConfigurationPtr & config, bool enable_discovery = false, const String & config_name = "remote_servers");
|
|
|
|
void startClusterDiscovery();
|
|
|
|
/// Sets custom cluster, but doesn't update configuration
|
|
void setCluster(const String & cluster_name, const std::shared_ptr<Cluster> & cluster);
|
|
void reloadClusterConfig() const;
|
|
|
|
Compiler & getCompiler();
|
|
|
|
/// Call after initialization before using system logs. Call for global context.
|
|
void initializeSystemLogs();
|
|
|
|
/// Call after initialization before using trace collector.
|
|
void initializeTraceCollector();
|
|
|
|
bool hasTraceCollector() const;
|
|
|
|
/// Nullptr if the query log is not ready for this moment.
|
|
std::shared_ptr<QueryLog> getQueryLog() const;
|
|
std::shared_ptr<QueryThreadLog> getQueryThreadLog() const;
|
|
std::shared_ptr<QueryViewsLog> getQueryViewsLog() const;
|
|
std::shared_ptr<TraceLog> getTraceLog() const;
|
|
std::shared_ptr<TextLog> getTextLog() const;
|
|
std::shared_ptr<MetricLog> getMetricLog() const;
|
|
std::shared_ptr<AsynchronousMetricLog> getAsynchronousMetricLog() const;
|
|
std::shared_ptr<OpenTelemetrySpanLog> getOpenTelemetrySpanLog() const;
|
|
std::shared_ptr<ZooKeeperLog> getZooKeeperLog() const;
|
|
std::shared_ptr<SessionLog> getSessionLog() const;
|
|
|
|
/// Returns an object used to log operations with parts if it possible.
|
|
/// Provide table name to make required checks.
|
|
std::shared_ptr<PartLog> getPartLog(const String & part_database) const;
|
|
|
|
const MergeTreeSettings & getMergeTreeSettings() const;
|
|
const MergeTreeSettings & getReplicatedMergeTreeSettings() const;
|
|
const StorageS3Settings & getStorageS3Settings() const;
|
|
|
|
/// Prevents DROP TABLE if its size is greater than max_size (50GB by default, max_size=0 turn off this check)
|
|
void setMaxTableSizeToDrop(size_t max_size);
|
|
void checkTableCanBeDropped(const String & database, const String & table, const size_t & table_size) const;
|
|
|
|
/// Prevents DROP PARTITION if its size is greater than max_size (50GB by default, max_size=0 turn off this check)
|
|
void setMaxPartitionSizeToDrop(size_t max_size);
|
|
void checkPartitionCanBeDropped(const String & database, const String & table, const size_t & partition_size) const;
|
|
|
|
/// Lets you select the compression codec according to the conditions described in the configuration file.
|
|
std::shared_ptr<ICompressionCodec> chooseCompressionCodec(size_t part_size, double part_size_ratio) const;
|
|
|
|
|
|
/// Provides storage disks
|
|
DiskPtr getDisk(const String & name) const;
|
|
|
|
StoragePoliciesMap getPoliciesMap() const;
|
|
DisksMap getDisksMap() const;
|
|
void updateStorageConfiguration(const Poco::Util::AbstractConfiguration & config);
|
|
|
|
|
|
/// Provides storage politics schemes
|
|
StoragePolicyPtr getStoragePolicy(const String & name) const;
|
|
|
|
/// Get the server uptime in seconds.
|
|
time_t getUptimeSeconds() const;
|
|
|
|
using ConfigReloadCallback = std::function<void()>;
|
|
void setConfigReloadCallback(ConfigReloadCallback && callback);
|
|
void reloadConfig() const;
|
|
|
|
void shutdown();
|
|
|
|
bool isInternalQuery() const { return is_internal_query; }
|
|
void setInternalQuery(bool internal) { is_internal_query = internal; }
|
|
|
|
ActionLocksManagerPtr getActionLocksManager();
|
|
|
|
enum class ApplicationType
|
|
{
|
|
SERVER, /// The program is run as clickhouse-server daemon (default behavior)
|
|
CLIENT, /// clickhouse-client
|
|
LOCAL, /// clickhouse-local
|
|
KEEPER, /// clickhouse-keeper (also daemon)
|
|
};
|
|
|
|
ApplicationType getApplicationType() const;
|
|
void setApplicationType(ApplicationType type);
|
|
|
|
/// Sets default_profile and system_profile, must be called once during the initialization
|
|
void setDefaultProfiles(const Poco::Util::AbstractConfiguration & config);
|
|
String getDefaultProfileName() const;
|
|
String getSystemProfileName() const;
|
|
|
|
/// Base path for format schemas
|
|
String getFormatSchemaPath() const;
|
|
void setFormatSchemaPath(const String & path);
|
|
|
|
SampleBlockCache & getSampleBlockCache() const;
|
|
|
|
/// Query parameters for prepared statements.
|
|
bool hasQueryParameters() const;
|
|
const NameToNameMap & getQueryParameters() const;
|
|
void setQueryParameter(const String & name, const String & value);
|
|
void setQueryParameters(const NameToNameMap & parameters) { query_parameters = parameters; }
|
|
|
|
/// Add started bridge command. It will be killed after context destruction
|
|
void addBridgeCommand(std::unique_ptr<ShellCommand> cmd) const;
|
|
|
|
IHostContextPtr & getHostContext();
|
|
const IHostContextPtr & getHostContext() const;
|
|
|
|
/// Initialize context of distributed DDL query with Replicated database.
|
|
void initZooKeeperMetadataTransaction(ZooKeeperMetadataTransactionPtr txn, bool attach_existing = false);
|
|
/// Returns context of current distributed DDL query or nullptr.
|
|
ZooKeeperMetadataTransactionPtr getZooKeeperMetadataTransaction() const;
|
|
/// Removes context of current distributed DDL.
|
|
void resetZooKeeperMetadataTransaction();
|
|
|
|
PartUUIDsPtr getPartUUIDs() const;
|
|
PartUUIDsPtr getIgnoredPartUUIDs() const;
|
|
|
|
AsynchronousInsertQueue * getAsynchronousInsertQueue() const;
|
|
void setAsynchronousInsertQueue(const std::shared_ptr<AsynchronousInsertQueue> & ptr);
|
|
|
|
ReadTaskCallback getReadTaskCallback() const;
|
|
void setReadTaskCallback(ReadTaskCallback && callback);
|
|
|
|
MergeTreeReadTaskCallback getMergeTreeReadTaskCallback() const;
|
|
void setMergeTreeReadTaskCallback(MergeTreeReadTaskCallback && callback);
|
|
|
|
/// Background executors related methods
|
|
void initializeBackgroundExecutorsIfNeeded();
|
|
|
|
MergeMutateBackgroundExecutorPtr getMergeMutateExecutor() const;
|
|
OrdinaryBackgroundExecutorPtr getMovesExecutor() const;
|
|
OrdinaryBackgroundExecutorPtr getFetchesExecutor() const;
|
|
OrdinaryBackgroundExecutorPtr getCommonExecutor() const;
|
|
|
|
/** Get settings for reading from filesystem. */
|
|
ReadSettings getReadSettings() const;
|
|
|
|
private:
|
|
std::unique_lock<std::recursive_mutex> getLock() const;
|
|
|
|
void initGlobal();
|
|
|
|
/// Compute and set actual user settings, client_info.current_user should be set
|
|
void calculateAccessRights();
|
|
|
|
template <typename... Args>
|
|
void checkAccessImpl(const Args &... args) const;
|
|
|
|
EmbeddedDictionaries & getEmbeddedDictionariesImpl(bool throw_on_error) const;
|
|
|
|
void checkCanBeDropped(const String & database, const String & table, const size_t & size, const size_t & max_size_to_drop) const;
|
|
|
|
StoragePolicySelectorPtr getStoragePolicySelector(std::lock_guard<std::mutex> & lock) const;
|
|
|
|
DiskSelectorPtr getDiskSelector(std::lock_guard<std::mutex> & /* lock */) const;
|
|
};
|
|
|
|
}
|