From d7f7f16fbcfa8063e295708b4feb3b0079ad05f0 Mon Sep 17 00:00:00 2001 From: Azat Khuzhin Date: Fri, 23 Jun 2023 10:44:13 +0200 Subject: [PATCH 1/7] Introduce IStorage::supportsTrivialCountOptimization() Signed-off-by: Azat Khuzhin --- src/Interpreters/InterpreterSelectQuery.cpp | 3 +-- src/Planner/PlannerJoinTree.cpp | 3 +++ src/Storages/IStorage.h | 3 +++ src/Storages/MergeTree/MergeTreeData.h | 2 ++ src/Storages/StorageMaterializedMySQL.h | 2 ++ 5 files changed, 11 insertions(+), 2 deletions(-) diff --git a/src/Interpreters/InterpreterSelectQuery.cpp b/src/Interpreters/InterpreterSelectQuery.cpp index d07a65215445..fc3ea3a13ca2 100644 --- a/src/Interpreters/InterpreterSelectQuery.cpp +++ b/src/Interpreters/InterpreterSelectQuery.cpp @@ -2274,8 +2274,7 @@ std::optional InterpreterSelectQuery::getTrivialCount(UInt64 max_paralle && !settings.allow_experimental_query_deduplication && !settings.empty_result_for_aggregation_by_empty_set && storage - && storage->getName() != "MaterializedMySQL" - && !storage->hasLightweightDeletedMask() + && storage->supportsTrivialCountOptimization() && query_info.filter_asts.empty() && query_analyzer->hasAggregation() && (query_analyzer->aggregates().size() == 1) diff --git a/src/Planner/PlannerJoinTree.cpp b/src/Planner/PlannerJoinTree.cpp index 5d8f8ca8741f..c118fccded43 100644 --- a/src/Planner/PlannerJoinTree.cpp +++ b/src/Planner/PlannerJoinTree.cpp @@ -182,6 +182,9 @@ bool applyTrivialCountIfPossible( return false; const auto & storage = table_node.getStorage(); + if (!storage->supportsTrivialCountOptimization()) + return false; + auto storage_id = storage->getStorageID(); auto row_policy_filter = query_context->getRowPolicyFilter(storage_id.getDatabaseName(), storage_id.getTableName(), diff --git a/src/Storages/IStorage.h b/src/Storages/IStorage.h index 76641b656a21..701e02a85ac7 100644 --- a/src/Storages/IStorage.h +++ b/src/Storages/IStorage.h @@ -254,6 +254,9 @@ class IStorage : public std::enable_shared_from_this, public TypePromo /// because those are internally translated into 'ALTER UDPATE' mutations. virtual bool supportsDelete() const { return false; } + /// Return true if the trivial count query could be optimized without reading the data at all. + virtual bool supportsTrivialCountOptimization() const { return false; } + private: StorageID storage_id; diff --git a/src/Storages/MergeTree/MergeTreeData.h b/src/Storages/MergeTree/MergeTreeData.h index 41fc46578542..5e6b043c31c7 100644 --- a/src/Storages/MergeTree/MergeTreeData.h +++ b/src/Storages/MergeTree/MergeTreeData.h @@ -434,6 +434,8 @@ class MergeTreeData : public IStorage, public WithMutableContext bool areAsynchronousInsertsEnabled() const override { return getSettings()->async_insert; } + bool supportsTrivialCountOptimization() const override { return !hasLightweightDeletedMask(); } + NamesAndTypesList getVirtuals() const override; bool mayBenefitFromIndexForIn(const ASTPtr & left_in_operand, ContextPtr, const StorageMetadataPtr & metadata_snapshot) const override; diff --git a/src/Storages/StorageMaterializedMySQL.h b/src/Storages/StorageMaterializedMySQL.h index 08fbb61960f7..e6fcbc203e6f 100644 --- a/src/Storages/StorageMaterializedMySQL.h +++ b/src/Storages/StorageMaterializedMySQL.h @@ -41,6 +41,8 @@ class StorageMaterializedMySQL final : public StorageProxy void drop() override { nested_storage->drop(); } + bool supportsTrivialCountOptimization() const override { return false; } + private: [[noreturn]] static void throwNotAllowed() { From a0070eda02736903b984518daf3d1c79bfe5fd94 Mon Sep 17 00:00:00 2001 From: Azat Khuzhin Date: Fri, 23 Jun 2023 10:48:21 +0200 Subject: [PATCH 2/7] Slightly optimize code in ClusterProxy::executeQuery() Signed-off-by: Azat Khuzhin --- src/Interpreters/ClusterProxy/executeQuery.cpp | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/src/Interpreters/ClusterProxy/executeQuery.cpp b/src/Interpreters/ClusterProxy/executeQuery.cpp index 3dea52faf461..5efba383e4b9 100644 --- a/src/Interpreters/ClusterProxy/executeQuery.cpp +++ b/src/Interpreters/ClusterProxy/executeQuery.cpp @@ -176,11 +176,9 @@ void executeQuery( size_t shards = query_info.getCluster()->getShardCount(); for (const auto & shard_info : query_info.getCluster()->getShardsInfo()) { - ASTPtr query_ast_for_shard; - if (query_info.optimized_cluster && settings.optimize_skip_unused_shards_rewrite_in && shards > 1) + ASTPtr query_ast_for_shard = query_ast->clone(); + if (sharding_key_expr && query_info.optimized_cluster && settings.optimize_skip_unused_shards_rewrite_in && shards > 1) { - query_ast_for_shard = query_ast->clone(); - OptimizeShardingKeyRewriteInVisitor::Data visitor_data{ sharding_key_expr, sharding_key_expr->getSampleBlock().getByPosition(0).type, @@ -191,8 +189,6 @@ void executeQuery( OptimizeShardingKeyRewriteInVisitor visitor(visitor_data); visitor.visit(query_ast_for_shard); } - else - query_ast_for_shard = query_ast->clone(); if (shard_filter_generator) { From 67095d2150cafc91c0eebea4a17a8dc5f17b307c Mon Sep 17 00:00:00 2001 From: Azat Khuzhin Date: Fri, 23 Jun 2023 10:48:58 +0200 Subject: [PATCH 3/7] Fix comment for function argument in TableFunctionRemote Signed-off-by: Azat Khuzhin --- src/TableFunctions/TableFunctionRemote.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/TableFunctions/TableFunctionRemote.cpp b/src/TableFunctions/TableFunctionRemote.cpp index 4143014a7b32..e6d72ddf17b9 100644 --- a/src/TableFunctions/TableFunctionRemote.cpp +++ b/src/TableFunctions/TableFunctionRemote.cpp @@ -264,7 +264,7 @@ void TableFunctionRemote::parseArguments(const ASTPtr & ast_function, ContextPtr secure, /* priority= */ Priority{1}, /* cluster_name= */ "", - /* password= */ "" + /* cluster_secret= */ "" }; cluster = std::make_shared(context->getSettingsRef(), names, params); } From b22247609036020e9bc4da64f1a297e49c29edfa Mon Sep 17 00:00:00 2001 From: Azat Khuzhin Date: Fri, 23 Jun 2023 14:19:08 +0200 Subject: [PATCH 4/7] Add ability to pass table for connections checks per-shard to ReadFromRemote Signed-off-by: Azat Khuzhin --- src/Interpreters/ClusterProxy/SelectStreamFactory.cpp | 1 + src/Interpreters/ClusterProxy/SelectStreamFactory.h | 2 ++ src/Processors/QueryPlan/ReadFromRemote.cpp | 6 ++++-- src/Processors/QueryPlan/ReadFromRemote.h | 1 + 4 files changed, 8 insertions(+), 2 deletions(-) diff --git a/src/Interpreters/ClusterProxy/SelectStreamFactory.cpp b/src/Interpreters/ClusterProxy/SelectStreamFactory.cpp index 0cf3f3609944..953e38d56cd5 100644 --- a/src/Interpreters/ClusterProxy/SelectStreamFactory.cpp +++ b/src/Interpreters/ClusterProxy/SelectStreamFactory.cpp @@ -124,6 +124,7 @@ void SelectStreamFactory::createForShard( { remote_shards.emplace_back(Shard{ .query = query_ast, + .main_table = main_table, .header = header, .shard_info = shard_info, .lazy = lazy, diff --git a/src/Interpreters/ClusterProxy/SelectStreamFactory.h b/src/Interpreters/ClusterProxy/SelectStreamFactory.h index 030c0b77dd52..1cc5a3b1a77e 100644 --- a/src/Interpreters/ClusterProxy/SelectStreamFactory.h +++ b/src/Interpreters/ClusterProxy/SelectStreamFactory.h @@ -50,6 +50,8 @@ class SelectStreamFactory { /// Query and header may be changed depending on shard. ASTPtr query; + /// Used to check the table existence on remote node + StorageID main_table; Block header; Cluster::ShardInfo shard_info; diff --git a/src/Processors/QueryPlan/ReadFromRemote.cpp b/src/Processors/QueryPlan/ReadFromRemote.cpp index 5cc13f45df40..7a99c3632328 100644 --- a/src/Processors/QueryPlan/ReadFromRemote.cpp +++ b/src/Processors/QueryPlan/ReadFromRemote.cpp @@ -162,7 +162,9 @@ void ReadFromRemote::addLazyPipe(Pipes & pipes, const ClusterProxy::SelectStream if (my_table_func_ptr) try_results = my_shard.shard_info.pool->getManyForTableFunction(timeouts, ¤t_settings, PoolMode::GET_MANY); else - try_results = my_shard.shard_info.pool->getManyChecked(timeouts, ¤t_settings, PoolMode::GET_MANY, my_main_table.getQualifiedName()); + try_results = my_shard.shard_info.pool->getManyChecked( + timeouts, ¤t_settings, PoolMode::GET_MANY, + my_shard.main_table ? my_shard.main_table.getQualifiedName() : my_main_table.getQualifiedName()); } catch (const Exception & ex) { @@ -241,7 +243,7 @@ void ReadFromRemote::addPipe(Pipes & pipes, const ClusterProxy::SelectStreamFact remote_query_executor->setPoolMode(PoolMode::GET_MANY); if (!table_func_ptr) - remote_query_executor->setMainTable(main_table); + remote_query_executor->setMainTable(shard.main_table ? shard.main_table : main_table); pipes.emplace_back(createRemoteSourcePipe(remote_query_executor, add_agg_info, add_totals, add_extremes, async_read, async_query_sending)); addConvertingActions(pipes.back(), output_stream->header); diff --git a/src/Processors/QueryPlan/ReadFromRemote.h b/src/Processors/QueryPlan/ReadFromRemote.h index d4005d81f1be..ac869cd89f94 100644 --- a/src/Processors/QueryPlan/ReadFromRemote.h +++ b/src/Processors/QueryPlan/ReadFromRemote.h @@ -22,6 +22,7 @@ using ThrottlerPtr = std::shared_ptr; class ReadFromRemote final : public ISourceStep { public: + /// @param main_table_ if Shards contains main_table then this parameter will be ignored ReadFromRemote( ClusterProxy::SelectStreamFactory::Shards shards_, Block header_, From 83c0f03b98d6b3cbd10f9690256aed2fada47177 Mon Sep 17 00:00:00 2001 From: Azat Khuzhin Date: Fri, 23 Jun 2023 14:21:53 +0200 Subject: [PATCH 5/7] Change signature of the updateSettingsForCluster() to avoid cluster requirement Signed-off-by: Azat Khuzhin --- src/Interpreters/ClusterProxy/executeQuery.cpp | 11 ++++++++--- src/Interpreters/ClusterProxy/executeQuery.h | 8 ++++++-- src/Storages/getStructureOfRemoteTable.cpp | 4 ++-- 3 files changed, 16 insertions(+), 7 deletions(-) diff --git a/src/Interpreters/ClusterProxy/executeQuery.cpp b/src/Interpreters/ClusterProxy/executeQuery.cpp index 5efba383e4b9..2fed626ffb7e 100644 --- a/src/Interpreters/ClusterProxy/executeQuery.cpp +++ b/src/Interpreters/ClusterProxy/executeQuery.cpp @@ -35,7 +35,12 @@ namespace ErrorCodes namespace ClusterProxy { -ContextMutablePtr updateSettingsForCluster(const Cluster & cluster, ContextPtr context, const Settings & settings, const StorageID & main_table, const SelectQueryInfo * query_info, Poco::Logger * log) +ContextMutablePtr updateSettingsForCluster(bool interserver_mode, + ContextPtr context, + const Settings & settings, + const StorageID & main_table, + const SelectQueryInfo * query_info, + Poco::Logger * log) { Settings new_settings = settings; new_settings.queue_max_wait_ms = Cluster::saturate(new_settings.queue_max_wait_ms, settings.max_execution_time); @@ -43,7 +48,7 @@ ContextMutablePtr updateSettingsForCluster(const Cluster & cluster, ContextPtr c /// If "secret" (in remote_servers) is not in use, /// user on the shard is not the same as the user on the initiator, /// hence per-user limits should not be applied. - if (cluster.getSecret().empty()) + if (!interserver_mode) { /// Does not matter on remote servers, because queries are sent under different user. new_settings.max_concurrent_queries_for_user = 0; @@ -170,7 +175,7 @@ void executeQuery( std::vector plans; SelectStreamFactory::Shards remote_shards; - auto new_context = updateSettingsForCluster(*query_info.getCluster(), context, settings, main_table, &query_info, log); + auto new_context = updateSettingsForCluster(!query_info.getCluster()->getSecret().empty(), context, settings, main_table, &query_info, log); new_context->increaseDistributedDepth(); size_t shards = query_info.getCluster()->getShardCount(); diff --git a/src/Interpreters/ClusterProxy/executeQuery.h b/src/Interpreters/ClusterProxy/executeQuery.h index 41f6da55686b..511914e99e47 100644 --- a/src/Interpreters/ClusterProxy/executeQuery.h +++ b/src/Interpreters/ClusterProxy/executeQuery.h @@ -34,8 +34,12 @@ class SelectStreamFactory; /// - optimize_skip_unused_shards_nesting /// /// @return new Context with adjusted settings -ContextMutablePtr updateSettingsForCluster( - const Cluster & cluster, ContextPtr context, const Settings & settings, const StorageID & main_table, const SelectQueryInfo * query_info = nullptr, Poco::Logger * log = nullptr); +ContextMutablePtr updateSettingsForCluster(bool interserver_mode, + ContextPtr context, + const Settings & settings, + const StorageID & main_table, + const SelectQueryInfo * query_info = nullptr, + Poco::Logger * log = nullptr); using AdditionalShardFilterGenerator = std::function; /// Execute a distributed query, creating a query plan, from which the query pipeline can be built. diff --git a/src/Storages/getStructureOfRemoteTable.cpp b/src/Storages/getStructureOfRemoteTable.cpp index e5fc01be9f47..cbed05e30edd 100644 --- a/src/Storages/getStructureOfRemoteTable.cpp +++ b/src/Storages/getStructureOfRemoteTable.cpp @@ -58,7 +58,7 @@ ColumnsDescription getStructureOfRemoteTableInShard( } ColumnsDescription res; - auto new_context = ClusterProxy::updateSettingsForCluster(cluster, context, context->getSettingsRef(), table_id); + auto new_context = ClusterProxy::updateSettingsForCluster(!cluster.getSecret().empty(), context, context->getSettingsRef(), table_id); /// Ignore limit for result number of rows (that could be set during handling CSE/CTE), /// since this is a service query and should not lead to query failure. @@ -177,7 +177,7 @@ ColumnsDescriptionByShardNum getExtendedObjectsOfRemoteTables( const auto & shards_info = cluster.getShardsInfo(); auto query = "DESC TABLE " + remote_table_id.getFullTableName(); - auto new_context = ClusterProxy::updateSettingsForCluster(cluster, context, context->getSettingsRef(), remote_table_id); + auto new_context = ClusterProxy::updateSettingsForCluster(!cluster.getSecret().empty(), context, context->getSettingsRef(), remote_table_id); new_context->setSetting("describe_extend_object_types", true); /// Expect only needed columns from the result of DESC TABLE. From 323128df6f3c779f3b2fe4a751fa98372a54fbbb Mon Sep 17 00:00:00 2001 From: Azat Khuzhin Date: Fri, 23 Jun 2023 15:02:32 +0200 Subject: [PATCH 6/7] Remove non existing ctor of Cluster::Address Signed-off-by: Azat Khuzhin --- src/Interpreters/Cluster.h | 6 ------ 1 file changed, 6 deletions(-) diff --git a/src/Interpreters/Cluster.h b/src/Interpreters/Cluster.h index de10a445d010..b90acd1d576d 100644 --- a/src/Interpreters/Cluster.h +++ b/src/Interpreters/Cluster.h @@ -144,12 +144,6 @@ class Cluster UInt32 shard_index_ = 0, UInt32 replica_index_ = 0); - Address( - const String & host_port_, - const ClusterConnectionParameters & params, - UInt32 shard_index_, - UInt32 replica_index_); - Address( const DatabaseReplicaInfo & info, const ClusterConnectionParameters & params, From 4a33e027c518f51d120c60b21ccd962264e1356a Mon Sep 17 00:00:00 2001 From: Azat Khuzhin Date: Tue, 20 Jun 2023 17:31:45 +0200 Subject: [PATCH 7/7] Split StorageReplicatedMergeTree reading methods Signed-off-by: Azat Khuzhin --- src/Storages/StorageReplicatedMergeTree.cpp | 133 ++++++++++++-------- src/Storages/StorageReplicatedMergeTree.h | 32 ++++- 2 files changed, 115 insertions(+), 50 deletions(-) diff --git a/src/Storages/StorageReplicatedMergeTree.cpp b/src/Storages/StorageReplicatedMergeTree.cpp index 13c0fb3f7c25..4e053c4598ca 100644 --- a/src/Storages/StorageReplicatedMergeTree.cpp +++ b/src/Storages/StorageReplicatedMergeTree.cpp @@ -4902,67 +4902,102 @@ void StorageReplicatedMergeTree::read( snapshot_data.alter_conversions = {}; }); - /** The `select_sequential_consistency` setting has two meanings: - * 1. To throw an exception if on a replica there are not all parts which have been written down on quorum of remaining replicas. - * 2. Do not read parts that have not yet been written to the quorum of the replicas. - * For this you have to synchronously go to ZooKeeper. - */ - if (local_context->getSettingsRef().select_sequential_consistency) - { - auto max_added_blocks = std::make_shared(getMaxAddedBlocks()); - if (auto plan = reader.read( - column_names, storage_snapshot, query_info, local_context, - max_block_size, num_streams, processed_stage, std::move(max_added_blocks), /*enable_parallel_reading*/false)) - query_plan = std::move(*plan); - return; - } + const auto & settings = local_context->getSettingsRef(); - if (local_context->canUseParallelReplicasOnInitiator()) - { - auto table_id = getStorageID(); + /// The `select_sequential_consistency` setting has two meanings: + /// 1. To throw an exception if on a replica there are not all parts which have been written down on quorum of remaining replicas. + /// 2. Do not read parts that have not yet been written to the quorum of the replicas. + /// For this you have to synchronously go to ZooKeeper. + if (settings.select_sequential_consistency) + return readLocalSequentialConsistencyImpl(query_plan, column_names, storage_snapshot, query_info, local_context, processed_stage, max_block_size, num_streams); - ASTPtr modified_query_ast; + if (local_context->canUseParallelReplicasOnInitiator()) + return readParallelReplicasImpl(query_plan, column_names, storage_snapshot, query_info, local_context, processed_stage, max_block_size, num_streams); - Block header; + readLocalImpl(query_plan, column_names, storage_snapshot, query_info, local_context, processed_stage, max_block_size, num_streams); +} - if (local_context->getSettingsRef().allow_experimental_analyzer) - { - auto modified_query_tree = buildQueryTreeForShard(query_info, query_info.query_tree); +void StorageReplicatedMergeTree::readLocalSequentialConsistencyImpl( + QueryPlan & query_plan, + const Names & column_names, + const StorageSnapshotPtr & storage_snapshot, + SelectQueryInfo & query_info, + ContextPtr local_context, + QueryProcessingStage::Enum processed_stage, + size_t max_block_size, + size_t num_streams) +{ + auto max_added_blocks = std::make_shared(getMaxAddedBlocks()); + auto plan = reader.read(column_names, storage_snapshot, query_info, local_context, + max_block_size, num_streams, processed_stage, std::move(max_added_blocks), + /* enable_parallel_reading= */false); + if (plan) + query_plan = std::move(*plan); +} - header = InterpreterSelectQueryAnalyzer::getSampleBlock( - modified_query_tree, local_context, SelectQueryOptions(processed_stage).analyze()); - modified_query_ast = queryNodeToSelectQuery(modified_query_tree); - } - else - { - modified_query_ast = ClusterProxy::rewriteSelectQuery(local_context, query_info.query, - table_id.database_name, table_id.table_name, /*remote_table_function_ptr*/nullptr); - header - = InterpreterSelectQuery(modified_query_ast, local_context, SelectQueryOptions(processed_stage).analyze()).getSampleBlock(); - } +void StorageReplicatedMergeTree::readParallelReplicasImpl( + QueryPlan & query_plan, + const Names & /*column_names*/, + const StorageSnapshotPtr & storage_snapshot, + SelectQueryInfo & query_info, + ContextPtr local_context, + QueryProcessingStage::Enum processed_stage, + const size_t /*max_block_size*/, + const size_t /*num_streams*/) +{ + auto table_id = getStorageID(); - auto cluster = local_context->getCluster(local_context->getSettingsRef().cluster_for_parallel_replicas); + auto parallel_replicas_cluster = local_context->getCluster(local_context->getSettingsRef().cluster_for_parallel_replicas); - ClusterProxy::SelectStreamFactory select_stream_factory = - ClusterProxy::SelectStreamFactory( - header, - {}, - storage_snapshot, - processed_stage); + ASTPtr modified_query_ast; + Block header; + if (local_context->getSettingsRef().allow_experimental_analyzer) + { + auto modified_query_tree = buildQueryTreeForShard(query_info, query_info.query_tree); - ClusterProxy::executeQueryWithParallelReplicas( - query_plan, getStorageID(), /*remove_table_function_ptr*/ nullptr, - select_stream_factory, modified_query_ast, - local_context, query_info, cluster); + header = InterpreterSelectQueryAnalyzer::getSampleBlock( + modified_query_tree, local_context, SelectQueryOptions(processed_stage).analyze()); + modified_query_ast = queryNodeToSelectQuery(modified_query_tree); } else { - if (auto plan = reader.read( - column_names, storage_snapshot, query_info, - local_context, max_block_size, num_streams, - processed_stage, nullptr, /*enable_parallel_reading*/local_context->canUseParallelReplicasOnFollower())) - query_plan = std::move(*plan); + modified_query_ast = ClusterProxy::rewriteSelectQuery(local_context, query_info.query, + table_id.database_name, table_id.table_name, /*remote_table_function_ptr*/nullptr); + header + = InterpreterSelectQuery(modified_query_ast, local_context, SelectQueryOptions(processed_stage).analyze()).getSampleBlock(); } + + ClusterProxy::SelectStreamFactory select_stream_factory = ClusterProxy::SelectStreamFactory( + header, + {}, + storage_snapshot, + processed_stage); + + ClusterProxy::executeQueryWithParallelReplicas( + query_plan, getStorageID(), + /* table_func_ptr= */ nullptr, + select_stream_factory, modified_query_ast, + local_context, query_info, parallel_replicas_cluster); +} + +void StorageReplicatedMergeTree::readLocalImpl( + QueryPlan & query_plan, + const Names & column_names, + const StorageSnapshotPtr & storage_snapshot, + SelectQueryInfo & query_info, + ContextPtr local_context, + QueryProcessingStage::Enum processed_stage, + const size_t max_block_size, + const size_t num_streams) +{ + auto plan = reader.read( + column_names, storage_snapshot, query_info, + local_context, max_block_size, num_streams, + processed_stage, + /* max_block_numbers_to_read= */ nullptr, + /* enable_parallel_reading= */ local_context->canUseParallelReplicasOnFollower()); + if (plan) + query_plan = std::move(*plan); } template diff --git a/src/Storages/StorageReplicatedMergeTree.h b/src/Storages/StorageReplicatedMergeTree.h index 1a1b3c3b10c5..ded940bc1d2c 100644 --- a/src/Storages/StorageReplicatedMergeTree.h +++ b/src/Storages/StorageReplicatedMergeTree.h @@ -130,7 +130,7 @@ class StorageReplicatedMergeTree final : public MergeTreeData const Names & column_names, const StorageSnapshotPtr & storage_snapshot, SelectQueryInfo & query_info, - ContextPtr context, + ContextPtr local_context, QueryProcessingStage::Enum processed_stage, size_t max_block_size, size_t num_streams) override; @@ -513,6 +513,36 @@ class StorageReplicatedMergeTree final : public MergeTreeData static std::optional distributedWriteFromClusterStorage(const std::shared_ptr & src_storage_cluster, const ASTInsertQuery & query, ContextPtr context); + void readLocalImpl( + QueryPlan & query_plan, + const Names & column_names, + const StorageSnapshotPtr & storage_snapshot, + SelectQueryInfo & query_info, + ContextPtr local_context, + QueryProcessingStage::Enum processed_stage, + size_t max_block_size, + size_t num_streams); + + void readLocalSequentialConsistencyImpl( + QueryPlan & query_plan, + const Names & column_names, + const StorageSnapshotPtr & storage_snapshot, + SelectQueryInfo & query_info, + ContextPtr local_context, + QueryProcessingStage::Enum processed_stage, + size_t max_block_size, + size_t num_streams); + + void readParallelReplicasImpl( + QueryPlan & query_plan, + const Names & column_names, + const StorageSnapshotPtr & storage_snapshot, + SelectQueryInfo & query_info, + ContextPtr local_context, + QueryProcessingStage::Enum processed_stage, + size_t max_block_size, + size_t num_streams); + template void foreachActiveParts(Func && func, bool select_sequential_consistency) const;