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70d1adfe4b
* save format string for NetException * format exceptions * format exceptions 2 * format exceptions 3 * format exceptions 4 * format exceptions 5 * format exceptions 6 * fix * format exceptions 7 * format exceptions 8 * Update MergeTreeIndexGin.cpp * Update AggregateFunctionMap.cpp * Update AggregateFunctionMap.cpp * fix
1397 lines
61 KiB
C++
1397 lines
61 KiB
C++
#include <DataTypes/DataTypeString.h>
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#include <utility>
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#include <Backups/IRestoreCoordination.h>
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#include <Backups/RestorerFromBackup.h>
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#include <base/chrono_io.h>
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#include <base/getFQDNOrHostName.h>
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#include <Common/Exception.h>
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#include <Common/Macros.h>
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#include <Common/OpenTelemetryTraceContext.h>
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#include <Common/ZooKeeper/KeeperException.h>
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#include <Common/ZooKeeper/Types.h>
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#include <Common/ZooKeeper/ZooKeeper.h>
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#include <Databases/DatabaseReplicated.h>
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#include <Databases/DatabaseReplicatedWorker.h>
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#include <Databases/DDLDependencyVisitor.h>
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#include <Databases/TablesDependencyGraph.h>
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#include <Interpreters/Cluster.h>
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#include <Interpreters/Context.h>
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#include <Interpreters/DDLTask.h>
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#include <Interpreters/evaluateConstantExpression.h>
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#include <Interpreters/executeDDLQueryOnCluster.h>
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#include <Interpreters/executeQuery.h>
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#include <Interpreters/InterpreterCreateQuery.h>
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#include <IO/ReadBufferFromFile.h>
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#include <IO/ReadBufferFromString.h>
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#include <IO/ReadHelpers.h>
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#include <IO/WriteHelpers.h>
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#include <Parsers/ASTAlterQuery.h>
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#include <Parsers/ASTDropQuery.h>
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#include <Parsers/ASTFunction.h>
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#include <Parsers/formatAST.h>
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#include <Parsers/parseQuery.h>
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#include <Parsers/ParserCreateQuery.h>
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#include <Parsers/queryToString.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 NO_ZOOKEEPER;
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extern const int LOGICAL_ERROR;
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extern const int BAD_ARGUMENTS;
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extern const int REPLICA_ALREADY_EXISTS;
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extern const int DATABASE_REPLICATION_FAILED;
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extern const int UNKNOWN_DATABASE;
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extern const int UNKNOWN_TABLE;
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extern const int NOT_IMPLEMENTED;
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extern const int INCORRECT_QUERY;
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extern const int ALL_CONNECTION_TRIES_FAILED;
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extern const int NO_ACTIVE_REPLICAS;
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extern const int INCONSISTENT_METADATA_FOR_BACKUP;
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extern const int CANNOT_RESTORE_TABLE;
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}
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static constexpr const char * REPLICATED_DATABASE_MARK = "DatabaseReplicated";
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static constexpr const char * DROPPED_MARK = "DROPPED";
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static constexpr const char * BROKEN_TABLES_SUFFIX = "_broken_tables";
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static constexpr const char * BROKEN_REPLICATED_TABLES_SUFFIX = "_broken_replicated_tables";
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static constexpr size_t METADATA_FILE_BUFFER_SIZE = 32768;
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zkutil::ZooKeeperPtr DatabaseReplicated::getZooKeeper() const
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{
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return getContext()->getZooKeeper();
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}
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static inline String getHostID(ContextPtr global_context, const UUID & db_uuid)
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{
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return Cluster::Address::toString(getFQDNOrHostName(), global_context->getTCPPort()) + ':' + toString(db_uuid);
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}
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static inline UInt64 getMetadataHash(const String & table_name, const String & metadata)
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{
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SipHash hash;
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hash.update(table_name);
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hash.update(metadata);
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return hash.get64();
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}
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DatabaseReplicated::~DatabaseReplicated() = default;
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DatabaseReplicated::DatabaseReplicated(
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const String & name_,
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const String & metadata_path_,
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UUID uuid,
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const String & zookeeper_path_,
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const String & shard_name_,
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const String & replica_name_,
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DatabaseReplicatedSettings db_settings_,
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ContextPtr context_)
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: DatabaseAtomic(name_, metadata_path_, uuid, "DatabaseReplicated (" + name_ + ")", context_)
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, zookeeper_path(zookeeper_path_)
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, shard_name(shard_name_)
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, replica_name(replica_name_)
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, db_settings(std::move(db_settings_))
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, tables_metadata_digest(0)
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{
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if (zookeeper_path.empty() || shard_name.empty() || replica_name.empty())
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "ZooKeeper path, shard and replica names must be non-empty");
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if (shard_name.find('/') != std::string::npos || replica_name.find('/') != std::string::npos)
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "Shard and replica names should not contain '/'");
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if (shard_name.find('|') != std::string::npos || replica_name.find('|') != std::string::npos)
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "Shard and replica names should not contain '|'");
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if (zookeeper_path.back() == '/')
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zookeeper_path.resize(zookeeper_path.size() - 1);
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/// If zookeeper chroot prefix is used, path should start with '/', because chroot concatenates without it.
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if (zookeeper_path.front() != '/')
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zookeeper_path = "/" + zookeeper_path;
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if (!db_settings.collection_name.value.empty())
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fillClusterAuthInfo(db_settings.collection_name.value, context_->getConfigRef());
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}
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String DatabaseReplicated::getFullReplicaName() const
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{
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return shard_name + '|' + replica_name;
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}
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std::pair<String, String> DatabaseReplicated::parseFullReplicaName(const String & name)
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{
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String shard;
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String replica;
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auto pos = name.find('|');
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if (pos == std::string::npos || name.find('|', pos + 1) != std::string::npos)
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throw Exception(ErrorCodes::LOGICAL_ERROR, "Incorrect replica identifier: {}", name);
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shard = name.substr(0, pos);
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replica = name.substr(pos + 1);
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return {shard, replica};
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}
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ClusterPtr DatabaseReplicated::tryGetCluster() const
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{
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std::lock_guard lock{mutex};
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if (cluster)
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return cluster;
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/// Database is probably not created or not initialized yet, it's ok to return nullptr
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if (is_readonly)
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return cluster;
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try
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{
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/// A quick fix for stateless tests with DatabaseReplicated. Its ZK
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/// node can be destroyed at any time. If another test lists
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/// system.clusters to get client command line suggestions, it will
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/// get an error when trying to get the info about DB from ZK.
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/// Just ignore these inaccessible databases. A good example of a
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/// failing test is `01526_client_start_and_exit`.
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cluster = getClusterImpl();
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}
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catch (...)
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{
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tryLogCurrentException(log);
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}
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return cluster;
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}
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void DatabaseReplicated::setCluster(ClusterPtr && new_cluster)
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{
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std::lock_guard lock{mutex};
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cluster = std::move(new_cluster);
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}
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ClusterPtr DatabaseReplicated::getClusterImpl() const
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{
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Strings hosts;
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Strings host_ids;
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auto zookeeper = getContext()->getZooKeeper();
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constexpr int max_retries = 10;
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int iteration = 0;
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bool success = false;
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while (++iteration <= max_retries)
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{
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host_ids.resize(0);
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Coordination::Stat stat;
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hosts = zookeeper->getChildren(zookeeper_path + "/replicas", &stat);
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if (hosts.empty())
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throw Exception(ErrorCodes::NO_ACTIVE_REPLICAS, "No replicas of database {} found. "
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"It's possible if the first replica is not fully created yet "
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"or if the last replica was just dropped or due to logical error", zookeeper_path);
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Int32 cversion = stat.cversion;
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::sort(hosts.begin(), hosts.end());
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std::vector<zkutil::ZooKeeper::FutureGet> futures;
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futures.reserve(hosts.size());
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host_ids.reserve(hosts.size());
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for (const auto & host : hosts)
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futures.emplace_back(zookeeper->asyncTryGet(zookeeper_path + "/replicas/" + host));
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success = true;
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for (auto & future : futures)
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{
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auto res = future.get();
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if (res.error != Coordination::Error::ZOK)
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success = false;
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host_ids.emplace_back(res.data);
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}
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zookeeper->get(zookeeper_path + "/replicas", &stat);
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if (cversion != stat.cversion)
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success = false;
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if (success)
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break;
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}
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if (!success)
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throw Exception(ErrorCodes::ALL_CONNECTION_TRIES_FAILED, "Cannot get consistent cluster snapshot,"
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"because replicas are created or removed concurrently");
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assert(!hosts.empty());
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assert(hosts.size() == host_ids.size());
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String current_shard = parseFullReplicaName(hosts.front()).first;
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std::vector<Strings> shards;
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shards.emplace_back();
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for (size_t i = 0; i < hosts.size(); ++i)
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{
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const auto & id = host_ids[i];
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if (id == DROPPED_MARK)
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continue;
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auto [shard, replica] = parseFullReplicaName(hosts[i]);
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auto pos = id.rfind(':');
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String host_port = id.substr(0, pos);
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if (shard != current_shard)
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{
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current_shard = shard;
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if (!shards.back().empty())
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shards.emplace_back();
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}
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shards.back().emplace_back(unescapeForFileName(host_port));
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}
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UInt16 default_port = getContext()->getTCPPort();
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bool treat_local_as_remote = false;
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bool treat_local_port_as_remote = getContext()->getApplicationType() == Context::ApplicationType::LOCAL;
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return std::make_shared<Cluster>(
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getContext()->getSettingsRef(),
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shards,
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cluster_auth_info.cluster_username,
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cluster_auth_info.cluster_password,
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default_port,
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treat_local_as_remote,
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treat_local_port_as_remote,
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cluster_auth_info.cluster_secure_connection,
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/*priority=*/1,
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TSA_SUPPRESS_WARNING_FOR_READ(database_name), /// FIXME
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cluster_auth_info.cluster_secret);
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}
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void DatabaseReplicated::fillClusterAuthInfo(String collection_name, const Poco::Util::AbstractConfiguration & config_ref)
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{
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const auto & config_prefix = fmt::format("named_collections.{}", collection_name);
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if (!config_ref.has(config_prefix))
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "There is no collection named `{}` in config", collection_name);
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cluster_auth_info.cluster_username = config_ref.getString(config_prefix + ".cluster_username", "");
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cluster_auth_info.cluster_password = config_ref.getString(config_prefix + ".cluster_password", "");
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cluster_auth_info.cluster_secret = config_ref.getString(config_prefix + ".cluster_secret", "");
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cluster_auth_info.cluster_secure_connection = config_ref.getBool(config_prefix + ".cluster_secure_connection", false);
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}
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void DatabaseReplicated::tryConnectToZooKeeperAndInitDatabase(LoadingStrictnessLevel mode)
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{
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try
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{
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if (!getContext()->hasZooKeeper())
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{
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throw Exception(ErrorCodes::NO_ZOOKEEPER, "Can't create replicated database without ZooKeeper");
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}
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auto current_zookeeper = getContext()->getZooKeeper();
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if (!current_zookeeper->exists(zookeeper_path))
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{
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/// Create new database, multiple nodes can execute it concurrently
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createDatabaseNodesInZooKeeper(current_zookeeper);
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}
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replica_path = fs::path(zookeeper_path) / "replicas" / getFullReplicaName();
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bool is_create_query = mode == LoadingStrictnessLevel::CREATE;
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String replica_host_id;
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if (current_zookeeper->tryGet(replica_path, replica_host_id))
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{
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if (replica_host_id == DROPPED_MARK && !is_create_query)
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{
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LOG_WARNING(log, "Database {} exists locally, but marked dropped in ZooKeeper ({}). "
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"Will not try to start it up", getDatabaseName(), replica_path);
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is_probably_dropped = true;
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return;
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}
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String host_id = getHostID(getContext(), db_uuid);
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if (is_create_query || replica_host_id != host_id)
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{
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throw Exception(
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ErrorCodes::REPLICA_ALREADY_EXISTS,
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"Replica {} of shard {} of replicated database at {} already exists. Replica host ID: '{}', current host ID: '{}'",
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replica_name, shard_name, zookeeper_path, replica_host_id, host_id);
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}
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}
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else if (is_create_query)
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{
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/// Create new replica. Throws if replica with the same name already exists
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createReplicaNodesInZooKeeper(current_zookeeper);
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}
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else
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{
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/// It's not CREATE query, but replica does not exist. Probably it was dropped.
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/// Do not create anything, continue as readonly.
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LOG_WARNING(log, "Database {} exists locally, but its replica does not exist in ZooKeeper ({}). "
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"Assuming it was dropped, will not try to start it up", getDatabaseName(), replica_path);
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is_probably_dropped = true;
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return;
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}
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is_readonly = false;
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}
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catch (...)
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{
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if (mode < LoadingStrictnessLevel::FORCE_ATTACH)
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throw;
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/// It's server startup, ignore error.
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/// Worker thread will try to setup ZooKeeper connection
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tryLogCurrentException(log);
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}
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}
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bool DatabaseReplicated::createDatabaseNodesInZooKeeper(const zkutil::ZooKeeperPtr & current_zookeeper)
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{
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current_zookeeper->createAncestors(zookeeper_path);
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Coordination::Requests ops;
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ops.emplace_back(zkutil::makeCreateRequest(zookeeper_path, REPLICATED_DATABASE_MARK, zkutil::CreateMode::Persistent));
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ops.emplace_back(zkutil::makeCreateRequest(zookeeper_path + "/log", "", zkutil::CreateMode::Persistent));
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ops.emplace_back(zkutil::makeCreateRequest(zookeeper_path + "/replicas", "", zkutil::CreateMode::Persistent));
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ops.emplace_back(zkutil::makeCreateRequest(zookeeper_path + "/counter", "", zkutil::CreateMode::Persistent));
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/// We create and remove counter/cnt- node to increment sequential number of counter/ node and make log entry numbers start from 1.
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/// New replicas are created with log pointer equal to 0 and log pointer is a number of the last executed entry.
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/// It means that we cannot have log entry with number 0.
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ops.emplace_back(zkutil::makeCreateRequest(zookeeper_path + "/counter/cnt-", "", zkutil::CreateMode::Persistent));
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ops.emplace_back(zkutil::makeRemoveRequest(zookeeper_path + "/counter/cnt-", -1));
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ops.emplace_back(zkutil::makeCreateRequest(zookeeper_path + "/metadata", "", zkutil::CreateMode::Persistent));
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ops.emplace_back(zkutil::makeCreateRequest(zookeeper_path + "/max_log_ptr", "1", zkutil::CreateMode::Persistent));
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ops.emplace_back(zkutil::makeCreateRequest(zookeeper_path + "/logs_to_keep", "1000", zkutil::CreateMode::Persistent));
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Coordination::Responses responses;
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auto res = current_zookeeper->tryMulti(ops, responses);
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if (res == Coordination::Error::ZOK)
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return true; /// Created new database (it's the first replica)
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if (res == Coordination::Error::ZNODEEXISTS)
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return false; /// Database exists, we will add new replica
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/// Other codes are unexpected, will throw
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zkutil::KeeperMultiException::check(res, ops, responses);
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UNREACHABLE();
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}
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bool DatabaseReplicated::looksLikeReplicatedDatabasePath(const ZooKeeperPtr & current_zookeeper, const String & path)
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{
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Coordination::Stat stat;
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String maybe_database_mark;
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if (!current_zookeeper->tryGet(path, maybe_database_mark, &stat))
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return false;
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if (maybe_database_mark.starts_with(REPLICATED_DATABASE_MARK))
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return true;
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if (!maybe_database_mark.empty())
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return false;
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/// Old versions did not have REPLICATED_DATABASE_MARK. Check specific nodes exist and add mark.
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Coordination::Requests ops;
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ops.emplace_back(zkutil::makeCheckRequest(path + "/log", -1));
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ops.emplace_back(zkutil::makeCheckRequest(path + "/replicas", -1));
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ops.emplace_back(zkutil::makeCheckRequest(path + "/counter", -1));
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ops.emplace_back(zkutil::makeCheckRequest(path + "/metadata", -1));
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ops.emplace_back(zkutil::makeCheckRequest(path + "/max_log_ptr", -1));
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ops.emplace_back(zkutil::makeCheckRequest(path + "/logs_to_keep", -1));
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ops.emplace_back(zkutil::makeSetRequest(path, REPLICATED_DATABASE_MARK, stat.version));
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Coordination::Responses responses;
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auto res = current_zookeeper->tryMulti(ops, responses);
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if (res == Coordination::Error::ZOK)
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return true;
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/// Recheck database mark (just in case of concurrent update).
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if (!current_zookeeper->tryGet(path, maybe_database_mark, &stat))
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return false;
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return maybe_database_mark.starts_with(REPLICATED_DATABASE_MARK);
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}
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void DatabaseReplicated::createEmptyLogEntry(const ZooKeeperPtr & current_zookeeper)
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{
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/// On replica creation add empty entry to log. Can be used to trigger some actions on other replicas (e.g. update cluster info).
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DDLLogEntry entry{};
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DatabaseReplicatedDDLWorker::enqueueQueryImpl(current_zookeeper, entry, this, true);
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}
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bool DatabaseReplicated::waitForReplicaToProcessAllEntries(UInt64 timeout_ms)
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{
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if (!ddl_worker || is_probably_dropped)
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return false;
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return ddl_worker->waitForReplicaToProcessAllEntries(timeout_ms);
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}
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void DatabaseReplicated::createReplicaNodesInZooKeeper(const zkutil::ZooKeeperPtr & current_zookeeper)
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{
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if (!looksLikeReplicatedDatabasePath(current_zookeeper, zookeeper_path))
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "Cannot add new database replica: provided path {} "
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"already contains some data and it does not look like Replicated database path.", zookeeper_path);
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/// Write host name to replica_path, it will protect from multiple replicas with the same name
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auto host_id = getHostID(getContext(), db_uuid);
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for (int attempts = 10; attempts > 0; --attempts)
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{
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Coordination::Stat stat;
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String max_log_ptr_str = current_zookeeper->get(zookeeper_path + "/max_log_ptr", &stat);
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Coordination::Requests ops;
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ops.emplace_back(zkutil::makeCreateRequest(replica_path, host_id, zkutil::CreateMode::Persistent));
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ops.emplace_back(zkutil::makeCreateRequest(replica_path + "/log_ptr", "0", zkutil::CreateMode::Persistent));
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ops.emplace_back(zkutil::makeCreateRequest(replica_path + "/digest", "0", zkutil::CreateMode::Persistent));
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/// In addition to creating the replica nodes, we record the max_log_ptr at the instant where
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/// we declared ourself as an existing replica. We'll need this during recoverLostReplica to
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/// notify other nodes that issued new queries while this node was recovering.
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ops.emplace_back(zkutil::makeCheckRequest(zookeeper_path + "/max_log_ptr", stat.version));
|
|
Coordination::Responses responses;
|
|
const auto code = current_zookeeper->tryMulti(ops, responses);
|
|
if (code == Coordination::Error::ZOK)
|
|
{
|
|
max_log_ptr_at_creation = parse<UInt32>(max_log_ptr_str);
|
|
break;
|
|
}
|
|
else if (code == Coordination::Error::ZNODEEXISTS || attempts == 1)
|
|
{
|
|
/// If its our last attempt, or if the replica already exists, fail immediately.
|
|
zkutil::KeeperMultiException::check(code, ops, responses);
|
|
}
|
|
}
|
|
createEmptyLogEntry(current_zookeeper);
|
|
}
|
|
|
|
void DatabaseReplicated::beforeLoadingMetadata(ContextMutablePtr /*context*/, LoadingStrictnessLevel mode)
|
|
{
|
|
tryConnectToZooKeeperAndInitDatabase(mode);
|
|
}
|
|
|
|
void DatabaseReplicated::loadStoredObjects(
|
|
ContextMutablePtr local_context, LoadingStrictnessLevel mode, bool skip_startup_tables)
|
|
{
|
|
beforeLoadingMetadata(local_context, mode);
|
|
DatabaseAtomic::loadStoredObjects(local_context, mode, skip_startup_tables);
|
|
}
|
|
|
|
UInt64 DatabaseReplicated::getMetadataHash(const String & table_name) const
|
|
{
|
|
return DB::getMetadataHash(table_name, readMetadataFile(table_name));
|
|
}
|
|
|
|
void DatabaseReplicated::startupTables(ThreadPool & thread_pool, LoadingStrictnessLevel mode)
|
|
{
|
|
DatabaseAtomic::startupTables(thread_pool, mode);
|
|
|
|
/// TSA: No concurrent writes are possible during loading
|
|
UInt64 digest = 0;
|
|
for (const auto & table : TSA_SUPPRESS_WARNING_FOR_READ(tables))
|
|
digest += getMetadataHash(table.first);
|
|
|
|
LOG_DEBUG(log, "Calculated metadata digest of {} tables: {}", TSA_SUPPRESS_WARNING_FOR_READ(tables).size(), digest);
|
|
chassert(!TSA_SUPPRESS_WARNING_FOR_READ(tables_metadata_digest));
|
|
TSA_SUPPRESS_WARNING_FOR_WRITE(tables_metadata_digest) = digest;
|
|
|
|
if (is_probably_dropped)
|
|
return;
|
|
|
|
ddl_worker = std::make_unique<DatabaseReplicatedDDLWorker>(this, getContext());
|
|
ddl_worker->startup();
|
|
}
|
|
|
|
bool DatabaseReplicated::checkDigestValid(const ContextPtr & local_context, bool debug_check /* = true */) const
|
|
{
|
|
if (debug_check)
|
|
{
|
|
/// Reduce number of debug checks
|
|
if (thread_local_rng() % 16)
|
|
return true;
|
|
}
|
|
|
|
LOG_TEST(log, "Current in-memory metadata digest: {}", tables_metadata_digest);
|
|
|
|
/// Database is probably being dropped
|
|
if (!local_context->getZooKeeperMetadataTransaction() && (!ddl_worker || !ddl_worker->isCurrentlyActive()))
|
|
return true;
|
|
|
|
UInt64 local_digest = 0;
|
|
{
|
|
std::lock_guard lock{mutex};
|
|
for (const auto & table : TSA_SUPPRESS_WARNING_FOR_READ(tables))
|
|
local_digest += getMetadataHash(table.first);
|
|
}
|
|
|
|
if (local_digest != tables_metadata_digest)
|
|
{
|
|
LOG_ERROR(log, "Digest of local metadata ({}) is not equal to in-memory digest ({})", local_digest, tables_metadata_digest);
|
|
return false;
|
|
}
|
|
|
|
/// Do not check digest in Keeper after internal subquery, it's probably not committed yet
|
|
if (local_context->isInternalSubquery())
|
|
return true;
|
|
|
|
/// Check does not make sense to check digest in Keeper during recovering
|
|
if (is_recovering)
|
|
return true;
|
|
|
|
String zk_digest = getZooKeeper()->get(replica_path + "/digest");
|
|
String local_digest_str = toString(local_digest);
|
|
if (zk_digest != local_digest_str)
|
|
{
|
|
LOG_ERROR(log, "Digest of local metadata ({}) is not equal to digest in Keeper ({})", local_digest_str, zk_digest);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void DatabaseReplicated::checkQueryValid(const ASTPtr & query, ContextPtr query_context) const
|
|
{
|
|
/// Replicas will set correct name of current database in query context (database name can be different on replicas)
|
|
if (auto * ddl_query = dynamic_cast<ASTQueryWithTableAndOutput *>(query.get()))
|
|
{
|
|
if (ddl_query->getDatabase() != getDatabaseName())
|
|
throw Exception(ErrorCodes::UNKNOWN_DATABASE, "Database was renamed");
|
|
ddl_query->database.reset();
|
|
|
|
if (auto * create = query->as<ASTCreateQuery>())
|
|
{
|
|
bool replicated_table = create->storage && create->storage->engine && startsWith(create->storage->engine->name, "Replicated");
|
|
if (!replicated_table || !create->storage->engine->arguments)
|
|
return;
|
|
|
|
ASTs & args_ref = create->storage->engine->arguments->children;
|
|
ASTs args = args_ref;
|
|
if (args.size() < 2)
|
|
return;
|
|
|
|
/// It can be a constant expression. Try to evaluate it, ignore exception if we cannot.
|
|
bool has_expression_argument = args_ref[0]->as<ASTFunction>() || args_ref[1]->as<ASTFunction>();
|
|
if (has_expression_argument)
|
|
{
|
|
try
|
|
{
|
|
args[0] = evaluateConstantExpressionAsLiteral(args_ref[0]->clone(), query_context);
|
|
args[1] = evaluateConstantExpressionAsLiteral(args_ref[1]->clone(), query_context);
|
|
}
|
|
catch (...)
|
|
{
|
|
}
|
|
}
|
|
|
|
ASTLiteral * arg1 = args[0]->as<ASTLiteral>();
|
|
ASTLiteral * arg2 = args[1]->as<ASTLiteral>();
|
|
if (!arg1 || !arg2 || arg1->value.getType() != Field::Types::String || arg2->value.getType() != Field::Types::String)
|
|
return;
|
|
|
|
String maybe_path = arg1->value.get<String>();
|
|
String maybe_replica = arg2->value.get<String>();
|
|
|
|
/// Looks like it's ReplicatedMergeTree with explicit zookeeper_path and replica_name arguments.
|
|
/// Let's ensure that some macros are used.
|
|
/// NOTE: we cannot check here that substituted values will be actually different on shards and replicas.
|
|
|
|
Macros::MacroExpansionInfo info;
|
|
info.table_id = {getDatabaseName(), create->getTable(), create->uuid};
|
|
info.shard = getShardName();
|
|
info.replica = getReplicaName();
|
|
query_context->getMacros()->expand(maybe_path, info);
|
|
bool maybe_shard_macros = info.expanded_other;
|
|
info.expanded_other = false;
|
|
query_context->getMacros()->expand(maybe_replica, info);
|
|
bool maybe_replica_macros = info.expanded_other;
|
|
bool enable_functional_tests_helper = getContext()->getConfigRef().has("_functional_tests_helper_database_replicated_replace_args_macros");
|
|
|
|
if (!enable_functional_tests_helper)
|
|
{
|
|
if (query_context->getSettingsRef().database_replicated_allow_replicated_engine_arguments)
|
|
LOG_WARNING(log, "It's not recommended to explicitly specify zookeeper_path and replica_name in ReplicatedMergeTree arguments");
|
|
else
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY,
|
|
"It's not allowed to specify explicit zookeeper_path and replica_name "
|
|
"for ReplicatedMergeTree arguments in Replicated database. If you really want to "
|
|
"specify them explicitly, enable setting "
|
|
"database_replicated_allow_replicated_engine_arguments.");
|
|
}
|
|
|
|
if (maybe_shard_macros && maybe_replica_macros)
|
|
return;
|
|
|
|
if (enable_functional_tests_helper && !has_expression_argument)
|
|
{
|
|
if (maybe_path.empty() || maybe_path.back() != '/')
|
|
maybe_path += '/';
|
|
args_ref[0]->as<ASTLiteral>()->value = maybe_path + "auto_{shard}";
|
|
args_ref[1]->as<ASTLiteral>()->value = maybe_replica + "auto_{replica}";
|
|
return;
|
|
}
|
|
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY,
|
|
"Explicit zookeeper_path and replica_name are specified in ReplicatedMergeTree arguments. "
|
|
"If you really want to specify it explicitly, then you should use some macros "
|
|
"to distinguish different shards and replicas");
|
|
}
|
|
}
|
|
|
|
if (const auto * query_alter = query->as<ASTAlterQuery>())
|
|
{
|
|
for (const auto & command : query_alter->command_list->children)
|
|
{
|
|
if (!isSupportedAlterType(command->as<ASTAlterCommand&>().type))
|
|
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Unsupported type of ALTER query");
|
|
}
|
|
}
|
|
|
|
if (auto * query_drop = query->as<ASTDropQuery>())
|
|
{
|
|
if (query_drop->kind == ASTDropQuery::Kind::Detach && query_context->getSettingsRef().database_replicated_always_detach_permanently)
|
|
query_drop->permanently = true;
|
|
if (query_drop->kind == ASTDropQuery::Kind::Detach && !query_drop->permanently)
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY, "DETACH TABLE is not allowed for Replicated databases. "
|
|
"Use DETACH TABLE PERMANENTLY or SYSTEM RESTART REPLICA or set "
|
|
"database_replicated_always_detach_permanently to 1");
|
|
}
|
|
}
|
|
|
|
BlockIO DatabaseReplicated::tryEnqueueReplicatedDDL(const ASTPtr & query, ContextPtr query_context, bool internal)
|
|
{
|
|
|
|
if (query_context->getCurrentTransaction() && query_context->getSettingsRef().throw_on_unsupported_query_inside_transaction)
|
|
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Distributed DDL queries inside transactions are not supported");
|
|
|
|
if (is_readonly)
|
|
throw Exception(ErrorCodes::NO_ZOOKEEPER, "Database is in readonly mode, because it cannot connect to ZooKeeper");
|
|
|
|
if (!internal && (query_context->getClientInfo().query_kind != ClientInfo::QueryKind::INITIAL_QUERY))
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY, "It's not initial query. ON CLUSTER is not allowed for Replicated database.");
|
|
|
|
checkQueryValid(query, query_context);
|
|
LOG_DEBUG(log, "Proposing query: {}", queryToString(query));
|
|
|
|
DDLLogEntry entry;
|
|
entry.query = queryToString(query);
|
|
entry.initiator = ddl_worker->getCommonHostID();
|
|
entry.setSettingsIfRequired(query_context);
|
|
entry.tracing_context = OpenTelemetry::CurrentContext();
|
|
String node_path = ddl_worker->tryEnqueueAndExecuteEntry(entry, query_context);
|
|
|
|
Strings hosts_to_wait = getZooKeeper()->getChildren(zookeeper_path + "/replicas");
|
|
return getDistributedDDLStatus(node_path, entry, query_context, hosts_to_wait);
|
|
}
|
|
|
|
static UUID getTableUUIDIfReplicated(const String & metadata, ContextPtr context)
|
|
{
|
|
bool looks_like_replicated = metadata.find("ReplicatedMergeTree") != std::string::npos;
|
|
if (!looks_like_replicated)
|
|
return UUIDHelpers::Nil;
|
|
|
|
ParserCreateQuery parser;
|
|
auto size = context->getSettingsRef().max_query_size;
|
|
auto depth = context->getSettingsRef().max_parser_depth;
|
|
ASTPtr query = parseQuery(parser, metadata, size, depth);
|
|
const ASTCreateQuery & create = query->as<const ASTCreateQuery &>();
|
|
if (!create.storage || !create.storage->engine)
|
|
return UUIDHelpers::Nil;
|
|
if (!startsWith(create.storage->engine->name, "Replicated") || !endsWith(create.storage->engine->name, "MergeTree"))
|
|
return UUIDHelpers::Nil;
|
|
chassert(create.uuid != UUIDHelpers::Nil);
|
|
return create.uuid;
|
|
}
|
|
|
|
void DatabaseReplicated::recoverLostReplica(const ZooKeeperPtr & current_zookeeper, UInt32 our_log_ptr, UInt32 max_log_ptr)
|
|
{
|
|
is_recovering = true;
|
|
SCOPE_EXIT({ is_recovering = false; });
|
|
|
|
/// Let's compare local (possibly outdated) metadata with (most actual) metadata stored in ZooKeeper
|
|
/// and try to update the set of local tables.
|
|
/// We could drop all local tables and create the new ones just like it's new replica.
|
|
/// But it will cause all ReplicatedMergeTree tables to fetch all data parts again and data in other tables will be lost.
|
|
|
|
bool new_replica = our_log_ptr == 0;
|
|
if (new_replica)
|
|
LOG_INFO(log, "Will create new replica from log pointer {}", max_log_ptr);
|
|
else
|
|
LOG_WARNING(log, "Will recover replica with staled log pointer {} from log pointer {}", our_log_ptr, max_log_ptr);
|
|
|
|
auto table_name_to_metadata = tryGetConsistentMetadataSnapshot(current_zookeeper, max_log_ptr);
|
|
|
|
/// For ReplicatedMergeTree tables we can compare only UUIDs to ensure that it's the same table.
|
|
/// Metadata can be different, it's handled on table replication level.
|
|
/// We need to handle renamed tables only.
|
|
/// TODO maybe we should also update MergeTree SETTINGS if required?
|
|
std::unordered_map<UUID, String> zk_replicated_id_to_name;
|
|
for (const auto & zk_table : table_name_to_metadata)
|
|
{
|
|
UUID zk_replicated_id = getTableUUIDIfReplicated(zk_table.second, getContext());
|
|
if (zk_replicated_id != UUIDHelpers::Nil)
|
|
zk_replicated_id_to_name.emplace(zk_replicated_id, zk_table.first);
|
|
}
|
|
|
|
/// We will drop or move tables which exist only in local metadata
|
|
Strings tables_to_detach;
|
|
|
|
struct RenameEdge
|
|
{
|
|
String from;
|
|
String intermediate;
|
|
String to;
|
|
};
|
|
|
|
/// This is needed to generate intermediate name
|
|
String salt = toString(thread_local_rng());
|
|
|
|
std::vector<RenameEdge> replicated_tables_to_rename;
|
|
size_t total_tables = 0;
|
|
std::vector<UUID> replicated_ids;
|
|
for (auto existing_tables_it = getTablesIterator(getContext(), {}); existing_tables_it->isValid();
|
|
existing_tables_it->next(), ++total_tables)
|
|
{
|
|
String name = existing_tables_it->name();
|
|
UUID local_replicated_id = UUIDHelpers::Nil;
|
|
if (existing_tables_it->table()->supportsReplication())
|
|
{
|
|
/// Check if replicated tables have the same UUID
|
|
local_replicated_id = existing_tables_it->table()->getStorageID().uuid;
|
|
auto it = zk_replicated_id_to_name.find(local_replicated_id);
|
|
if (it != zk_replicated_id_to_name.end())
|
|
{
|
|
if (name != it->second)
|
|
{
|
|
String intermediate_name;
|
|
/// Possibly we failed to rename it on previous iteration
|
|
/// And this table was already renamed to an intermediate name
|
|
if (startsWith(name, ".rename-") && !startsWith(it->second, ".rename-"))
|
|
intermediate_name = name;
|
|
else
|
|
intermediate_name = fmt::format(".rename-{}-{}", name, sipHash64(fmt::format("{}-{}", name, salt)));
|
|
/// Need just update table name
|
|
replicated_tables_to_rename.push_back({name, intermediate_name, it->second});
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
|
|
auto in_zk = table_name_to_metadata.find(name);
|
|
if (in_zk == table_name_to_metadata.end() || in_zk->second != readMetadataFile(name))
|
|
{
|
|
/// Local table does not exist in ZooKeeper or has different metadata
|
|
tables_to_detach.emplace_back(std::move(name));
|
|
}
|
|
}
|
|
|
|
auto make_query_context = [this, current_zookeeper]()
|
|
{
|
|
auto query_context = Context::createCopy(getContext());
|
|
query_context->makeQueryContext();
|
|
query_context->getClientInfo().query_kind = ClientInfo::QueryKind::SECONDARY_QUERY;
|
|
query_context->getClientInfo().is_replicated_database_internal = true;
|
|
query_context->setCurrentDatabase(getDatabaseName());
|
|
query_context->setCurrentQueryId("");
|
|
auto txn = std::make_shared<ZooKeeperMetadataTransaction>(current_zookeeper, zookeeper_path, false, "");
|
|
query_context->initZooKeeperMetadataTransaction(txn);
|
|
return query_context;
|
|
};
|
|
|
|
String db_name = getDatabaseName();
|
|
String to_db_name = getDatabaseName() + BROKEN_TABLES_SUFFIX;
|
|
String to_db_name_replicated = getDatabaseName() + BROKEN_REPLICATED_TABLES_SUFFIX;
|
|
if (total_tables * db_settings.max_broken_tables_ratio < tables_to_detach.size())
|
|
throw Exception(ErrorCodes::DATABASE_REPLICATION_FAILED, "Too many tables to recreate: {} of {}", tables_to_detach.size(), total_tables);
|
|
else if (!tables_to_detach.empty())
|
|
{
|
|
LOG_WARNING(log, "Will recreate {} broken tables to recover replica", tables_to_detach.size());
|
|
/// It's too dangerous to automatically drop tables, so we will move them to special database.
|
|
/// We use Ordinary engine for destination database, because it's the only way to discard table UUID
|
|
/// and make possible creation of new table with the same UUID.
|
|
String query = fmt::format("CREATE DATABASE IF NOT EXISTS {} ENGINE=Ordinary", backQuoteIfNeed(to_db_name));
|
|
auto query_context = Context::createCopy(getContext());
|
|
query_context->setSetting("allow_deprecated_database_ordinary", 1);
|
|
executeQuery(query, query_context, true);
|
|
|
|
/// But we want to avoid discarding UUID of ReplicatedMergeTree tables, because it will not work
|
|
/// if zookeeper_path contains {uuid} macro. Replicated database do not recreate replicated tables on recovery,
|
|
/// so it's ok to save UUID of replicated table.
|
|
query = fmt::format("CREATE DATABASE IF NOT EXISTS {} ENGINE=Atomic", backQuoteIfNeed(to_db_name_replicated));
|
|
query_context = Context::createCopy(getContext());
|
|
executeQuery(query, query_context, true);
|
|
}
|
|
|
|
size_t moved_tables = 0;
|
|
std::vector<UUID> dropped_tables;
|
|
size_t dropped_dictionaries = 0;
|
|
|
|
for (const auto & table_name : tables_to_detach)
|
|
{
|
|
DDLGuardPtr table_guard = DatabaseCatalog::instance().getDDLGuard(db_name, table_name);
|
|
if (getDatabaseName() != db_name)
|
|
throw Exception(ErrorCodes::UNKNOWN_DATABASE, "Database was renamed, will retry");
|
|
|
|
auto table = tryGetTable(table_name, getContext());
|
|
|
|
auto move_table_to_database = [&](const String & broken_table_name, const String & to_database_name)
|
|
{
|
|
/// Table probably stores some data. Let's move it to another database.
|
|
String to_name = fmt::format("{}_{}_{}", broken_table_name, max_log_ptr, thread_local_rng() % 1000);
|
|
LOG_DEBUG(log, "Will RENAME TABLE {} TO {}.{}", backQuoteIfNeed(broken_table_name), backQuoteIfNeed(to_database_name), backQuoteIfNeed(to_name));
|
|
assert(db_name < to_database_name);
|
|
DDLGuardPtr to_table_guard = DatabaseCatalog::instance().getDDLGuard(to_database_name, to_name);
|
|
auto to_db_ptr = DatabaseCatalog::instance().getDatabase(to_database_name);
|
|
|
|
std::lock_guard lock{metadata_mutex};
|
|
UInt64 new_digest = tables_metadata_digest;
|
|
new_digest -= getMetadataHash(broken_table_name);
|
|
DatabaseAtomic::renameTable(make_query_context(), broken_table_name, *to_db_ptr, to_name, /* exchange */ false, /* dictionary */ false);
|
|
tables_metadata_digest = new_digest;
|
|
assert(checkDigestValid(getContext()));
|
|
++moved_tables;
|
|
};
|
|
|
|
if (!table->storesDataOnDisk())
|
|
{
|
|
LOG_DEBUG(log, "Will DROP TABLE {}, because it does not store data on disk and can be safely dropped", backQuoteIfNeed(table_name));
|
|
dropped_tables.push_back(tryGetTableUUID(table_name));
|
|
dropped_dictionaries += table->isDictionary();
|
|
table->flushAndShutdown();
|
|
|
|
if (table->getName() == "MaterializedView" || table->getName() == "WindowView")
|
|
{
|
|
/// We have to drop MV inner table, so MV will not try to do it implicitly breaking some invariants.
|
|
/// Also we have to commit metadata transaction, because it's not committed by default for inner tables of MVs.
|
|
/// Yep, I hate inner tables of materialized views.
|
|
auto mv_drop_inner_table_context = make_query_context();
|
|
table->dropInnerTableIfAny(/* sync */ true, mv_drop_inner_table_context);
|
|
mv_drop_inner_table_context->getZooKeeperMetadataTransaction()->commit();
|
|
}
|
|
|
|
std::lock_guard lock{metadata_mutex};
|
|
UInt64 new_digest = tables_metadata_digest;
|
|
new_digest -= getMetadataHash(table_name);
|
|
DatabaseAtomic::dropTableImpl(make_query_context(), table_name, /* sync */ true);
|
|
tables_metadata_digest = new_digest;
|
|
assert(checkDigestValid(getContext()));
|
|
}
|
|
else if (!table->supportsReplication())
|
|
{
|
|
move_table_to_database(table_name, to_db_name);
|
|
}
|
|
else
|
|
{
|
|
move_table_to_database(table_name, to_db_name_replicated);
|
|
}
|
|
}
|
|
|
|
if (!tables_to_detach.empty())
|
|
LOG_WARNING(log, "Cleaned {} outdated objects: dropped {} dictionaries and {} tables, moved {} tables",
|
|
tables_to_detach.size(), dropped_dictionaries, dropped_tables.size() - dropped_dictionaries, moved_tables);
|
|
|
|
/// Now database is cleared from outdated tables, let's rename ReplicatedMergeTree tables to actual names
|
|
/// We have to take into account that tables names could be changed with two general queries
|
|
/// 1) RENAME TABLE. There could be multiple pairs of tables (e.g. RENAME b TO c, a TO b, c TO d)
|
|
/// But it is equal to multiple subsequent RENAMEs each of which operates only with two tables
|
|
/// 2) EXCHANGE TABLE. This query swaps two names atomically and could not be represented with two separate RENAMEs
|
|
auto rename_table = [&](String from, String to)
|
|
{
|
|
LOG_DEBUG(log, "Will RENAME TABLE {} TO {}", backQuoteIfNeed(from), backQuoteIfNeed(to));
|
|
DDLGuardPtr table_guard = DatabaseCatalog::instance().getDDLGuard(db_name, std::min(from, to));
|
|
DDLGuardPtr to_table_guard = DatabaseCatalog::instance().getDDLGuard(db_name, std::max(from, to));
|
|
|
|
std::lock_guard lock{metadata_mutex};
|
|
UInt64 new_digest = tables_metadata_digest;
|
|
String statement = readMetadataFile(from);
|
|
new_digest -= DB::getMetadataHash(from, statement);
|
|
new_digest += DB::getMetadataHash(to, statement);
|
|
DatabaseAtomic::renameTable(make_query_context(), from, *this, to, false, false);
|
|
tables_metadata_digest = new_digest;
|
|
assert(checkDigestValid(getContext()));
|
|
};
|
|
|
|
LOG_DEBUG(log, "Starting first stage of renaming process. Will rename tables to intermediate names");
|
|
for (auto & [from, intermediate, _] : replicated_tables_to_rename)
|
|
{
|
|
/// Due to some unknown failures there could be tables
|
|
/// which are already in an intermediate state
|
|
/// For them we skip the first stage
|
|
if (from == intermediate)
|
|
continue;
|
|
rename_table(from, intermediate);
|
|
}
|
|
LOG_DEBUG(log, "Starting second stage of renaming process. Will rename tables from intermediate to desired names");
|
|
for (auto & [_, intermediate, to] : replicated_tables_to_rename)
|
|
rename_table(intermediate, to);
|
|
|
|
LOG_DEBUG(log, "Renames completed succesessfully");
|
|
|
|
for (const auto & id : dropped_tables)
|
|
DatabaseCatalog::instance().waitTableFinallyDropped(id);
|
|
|
|
|
|
/// Create all needed tables in a proper order
|
|
TablesDependencyGraph tables_dependencies("DatabaseReplicated (" + getDatabaseName() + ")");
|
|
for (const auto & [table_name, create_table_query] : table_name_to_metadata)
|
|
{
|
|
/// Note that table_name could contain a dot inside (e.g. .inner.1234-1234-1234-1234)
|
|
/// And QualifiedTableName::parseFromString doesn't handle this.
|
|
auto qualified_name = QualifiedTableName{.database = getDatabaseName(), .table = table_name};
|
|
auto query_ast = parseQueryFromMetadataInZooKeeper(table_name, create_table_query);
|
|
tables_dependencies.addDependencies(qualified_name, getDependenciesFromCreateQuery(getContext(), qualified_name, query_ast));
|
|
}
|
|
|
|
tables_dependencies.checkNoCyclicDependencies();
|
|
auto tables_to_create = tables_dependencies.getTablesSortedByDependency();
|
|
|
|
for (const auto & table_id : tables_to_create)
|
|
{
|
|
auto table_name = table_id.getTableName();
|
|
auto create_query_string = table_name_to_metadata[table_name];
|
|
if (isTableExist(table_name, getContext()))
|
|
{
|
|
assert(create_query_string == readMetadataFile(table_name));
|
|
continue;
|
|
}
|
|
|
|
auto query_ast = parseQueryFromMetadataInZooKeeper(table_name, create_query_string);
|
|
LOG_INFO(log, "Executing {}", serializeAST(*query_ast));
|
|
auto create_query_context = make_query_context();
|
|
InterpreterCreateQuery(query_ast, create_query_context).execute();
|
|
}
|
|
LOG_INFO(log, "All tables are created successfully");
|
|
|
|
if (max_log_ptr_at_creation != 0)
|
|
{
|
|
/// If the replica is new and some of the queries applied during recovery
|
|
/// where issued after the replica was created, then other nodes might be
|
|
/// waiting for this node to notify them that the query was applied.
|
|
for (UInt32 ptr = max_log_ptr_at_creation; ptr <= max_log_ptr; ++ptr)
|
|
{
|
|
auto entry_name = DDLTaskBase::getLogEntryName(ptr);
|
|
auto path = fs::path(zookeeper_path) / "log" / entry_name / "finished" / getFullReplicaName();
|
|
auto status = ExecutionStatus(0).serializeText();
|
|
auto res = current_zookeeper->tryCreate(path, status, zkutil::CreateMode::Persistent);
|
|
if (res == Coordination::Error::ZOK)
|
|
LOG_INFO(log, "Marked recovered {} as finished", entry_name);
|
|
}
|
|
}
|
|
|
|
std::lock_guard lock{metadata_mutex};
|
|
chassert(checkDigestValid(getContext()));
|
|
current_zookeeper->set(replica_path + "/digest", toString(tables_metadata_digest));
|
|
}
|
|
|
|
std::map<String, String> DatabaseReplicated::tryGetConsistentMetadataSnapshot(const ZooKeeperPtr & zookeeper, UInt32 & max_log_ptr)
|
|
{
|
|
std::map<String, String> table_name_to_metadata;
|
|
constexpr int max_retries = 10;
|
|
int iteration = 0;
|
|
while (++iteration <= max_retries)
|
|
{
|
|
table_name_to_metadata.clear();
|
|
LOG_DEBUG(log, "Trying to get consistent metadata snapshot for log pointer {}", max_log_ptr);
|
|
Strings table_names = zookeeper->getChildren(zookeeper_path + "/metadata");
|
|
|
|
std::vector<zkutil::ZooKeeper::FutureGet> futures;
|
|
futures.reserve(table_names.size());
|
|
for (const auto & table : table_names)
|
|
futures.emplace_back(zookeeper->asyncTryGet(zookeeper_path + "/metadata/" + table));
|
|
|
|
for (size_t i = 0; i < table_names.size(); ++i)
|
|
{
|
|
auto res = futures[i].get();
|
|
if (res.error != Coordination::Error::ZOK)
|
|
break;
|
|
table_name_to_metadata.emplace(unescapeForFileName(table_names[i]), res.data);
|
|
}
|
|
|
|
UInt32 new_max_log_ptr = parse<UInt32>(zookeeper->get(zookeeper_path + "/max_log_ptr"));
|
|
if (new_max_log_ptr == max_log_ptr && table_names.size() == table_name_to_metadata.size())
|
|
break;
|
|
|
|
if (max_log_ptr < new_max_log_ptr)
|
|
{
|
|
LOG_DEBUG(log, "Log pointer moved from {} to {}, will retry", max_log_ptr, new_max_log_ptr);
|
|
max_log_ptr = new_max_log_ptr;
|
|
}
|
|
else
|
|
{
|
|
chassert(max_log_ptr == new_max_log_ptr);
|
|
chassert(table_names.size() != table_name_to_metadata.size());
|
|
LOG_DEBUG(log, "Cannot get metadata of some tables due to ZooKeeper error, will retry");
|
|
}
|
|
}
|
|
|
|
if (max_retries < iteration)
|
|
throw Exception(ErrorCodes::DATABASE_REPLICATION_FAILED, "Cannot get consistent metadata snapshot");
|
|
|
|
LOG_DEBUG(log, "Got consistent metadata snapshot for log pointer {}", max_log_ptr);
|
|
|
|
return table_name_to_metadata;
|
|
}
|
|
|
|
ASTPtr DatabaseReplicated::parseQueryFromMetadataInZooKeeper(const String & node_name, const String & query)
|
|
{
|
|
ParserCreateQuery parser;
|
|
String description = "in ZooKeeper " + zookeeper_path + "/metadata/" + node_name;
|
|
auto ast = parseQuery(parser, query, description, 0, getContext()->getSettingsRef().max_parser_depth);
|
|
|
|
auto & create = ast->as<ASTCreateQuery &>();
|
|
if (create.uuid == UUIDHelpers::Nil || create.getTable() != TABLE_WITH_UUID_NAME_PLACEHOLDER || create.database)
|
|
throw Exception(ErrorCodes::LOGICAL_ERROR, "Got unexpected query from {}: {}", node_name, query);
|
|
|
|
bool is_materialized_view_with_inner_table = create.is_materialized_view && create.to_table_id.empty();
|
|
|
|
create.setDatabase(getDatabaseName());
|
|
create.setTable(unescapeForFileName(node_name));
|
|
create.attach = is_materialized_view_with_inner_table;
|
|
|
|
return ast;
|
|
}
|
|
|
|
void DatabaseReplicated::dropReplica(
|
|
DatabaseReplicated * database, const String & database_zookeeper_path, const String & full_replica_name)
|
|
{
|
|
assert(!database || database_zookeeper_path == database->zookeeper_path);
|
|
|
|
if (full_replica_name.find('/') != std::string::npos)
|
|
throw Exception(ErrorCodes::BAD_ARGUMENTS, "Invalid replica name: {}", full_replica_name);
|
|
|
|
auto zookeeper = Context::getGlobalContextInstance()->getZooKeeper();
|
|
|
|
String database_mark = zookeeper->get(database_zookeeper_path);
|
|
if (database_mark != REPLICATED_DATABASE_MARK)
|
|
throw Exception(ErrorCodes::BAD_ARGUMENTS, "Path {} does not look like a path of Replicated database", database_zookeeper_path);
|
|
|
|
String database_replica_path = fs::path(database_zookeeper_path) / "replicas" / full_replica_name;
|
|
if (!zookeeper->exists(database_replica_path))
|
|
throw Exception(ErrorCodes::BAD_ARGUMENTS, "Replica {} does not exist (database path: {})",
|
|
full_replica_name, database_zookeeper_path);
|
|
|
|
if (zookeeper->exists(database_replica_path + "/active"))
|
|
throw Exception(ErrorCodes::BAD_ARGUMENTS, "Replica {} is active, cannot drop it (database path: {})",
|
|
full_replica_name, database_zookeeper_path);
|
|
|
|
zookeeper->set(database_replica_path, DROPPED_MARK, -1);
|
|
/// Notify other replicas that cluster configuration was changed (if we can)
|
|
if (database)
|
|
database->createEmptyLogEntry(zookeeper);
|
|
|
|
zookeeper->tryRemoveRecursive(database_replica_path);
|
|
if (zookeeper->tryRemove(database_zookeeper_path + "/replicas") == Coordination::Error::ZOK)
|
|
{
|
|
/// It was the last replica, remove all metadata
|
|
zookeeper->tryRemoveRecursive(database_zookeeper_path);
|
|
}
|
|
}
|
|
|
|
void DatabaseReplicated::drop(ContextPtr context_)
|
|
{
|
|
if (is_probably_dropped)
|
|
{
|
|
/// Don't need to drop anything from ZooKeeper
|
|
DatabaseAtomic::drop(context_);
|
|
return;
|
|
}
|
|
|
|
auto current_zookeeper = getZooKeeper();
|
|
current_zookeeper->set(replica_path, DROPPED_MARK, -1);
|
|
createEmptyLogEntry(current_zookeeper);
|
|
|
|
DatabaseAtomic::drop(context_);
|
|
|
|
current_zookeeper->tryRemoveRecursive(replica_path);
|
|
/// TODO it may leave garbage in ZooKeeper if the last node lost connection here
|
|
if (current_zookeeper->tryRemove(zookeeper_path + "/replicas") == Coordination::Error::ZOK)
|
|
{
|
|
/// It was the last replica, remove all metadata
|
|
current_zookeeper->tryRemoveRecursive(zookeeper_path);
|
|
}
|
|
}
|
|
|
|
void DatabaseReplicated::stopReplication()
|
|
{
|
|
if (ddl_worker)
|
|
ddl_worker->shutdown();
|
|
}
|
|
|
|
void DatabaseReplicated::shutdown()
|
|
{
|
|
stopReplication();
|
|
ddl_worker = nullptr;
|
|
DatabaseAtomic::shutdown();
|
|
}
|
|
|
|
|
|
void DatabaseReplicated::dropTable(ContextPtr local_context, const String & table_name, bool sync)
|
|
{
|
|
auto txn = local_context->getZooKeeperMetadataTransaction();
|
|
assert(!ddl_worker || !ddl_worker->isCurrentlyActive() || txn || startsWith(table_name, ".inner_id."));
|
|
if (txn && txn->isInitialQuery() && !txn->isCreateOrReplaceQuery())
|
|
{
|
|
String metadata_zk_path = zookeeper_path + "/metadata/" + escapeForFileName(table_name);
|
|
txn->addOp(zkutil::makeRemoveRequest(metadata_zk_path, -1));
|
|
}
|
|
|
|
auto table = tryGetTable(table_name, getContext());
|
|
if (table->getName() == "MaterializedView" || table->getName() == "WindowView")
|
|
{
|
|
/// Avoid recursive locking of metadata_mutex
|
|
table->dropInnerTableIfAny(sync, local_context);
|
|
}
|
|
|
|
std::lock_guard lock{metadata_mutex};
|
|
UInt64 new_digest = tables_metadata_digest;
|
|
new_digest -= getMetadataHash(table_name);
|
|
if (txn && !txn->isCreateOrReplaceQuery())
|
|
txn->addOp(zkutil::makeSetRequest(replica_path + "/digest", toString(new_digest), -1));
|
|
|
|
DatabaseAtomic::dropTableImpl(local_context, table_name, sync);
|
|
tables_metadata_digest = new_digest;
|
|
|
|
assert(checkDigestValid(local_context));
|
|
}
|
|
|
|
void DatabaseReplicated::renameTable(ContextPtr local_context, const String & table_name, IDatabase & to_database,
|
|
const String & to_table_name, bool exchange, bool dictionary)
|
|
{
|
|
auto txn = local_context->getZooKeeperMetadataTransaction();
|
|
assert(txn);
|
|
|
|
if (this != &to_database)
|
|
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Moving tables between databases is not supported for Replicated engine");
|
|
if (table_name == to_table_name)
|
|
throw Exception(ErrorCodes::INCORRECT_QUERY, "Cannot rename table to itself");
|
|
if (!isTableExist(table_name, local_context))
|
|
throw Exception(ErrorCodes::UNKNOWN_TABLE, "Table {} does not exist", table_name);
|
|
if (exchange && !to_database.isTableExist(to_table_name, local_context))
|
|
throw Exception(ErrorCodes::UNKNOWN_TABLE, "Table {} does not exist", to_table_name);
|
|
|
|
String statement = readMetadataFile(table_name);
|
|
String statement_to;
|
|
if (exchange)
|
|
statement_to = readMetadataFile(to_table_name);
|
|
|
|
if (txn->isInitialQuery())
|
|
{
|
|
String metadata_zk_path = zookeeper_path + "/metadata/" + escapeForFileName(table_name);
|
|
String metadata_zk_path_to = zookeeper_path + "/metadata/" + escapeForFileName(to_table_name);
|
|
if (!txn->isCreateOrReplaceQuery())
|
|
txn->addOp(zkutil::makeRemoveRequest(metadata_zk_path, -1));
|
|
|
|
if (exchange)
|
|
{
|
|
txn->addOp(zkutil::makeRemoveRequest(metadata_zk_path_to, -1));
|
|
if (!txn->isCreateOrReplaceQuery())
|
|
txn->addOp(zkutil::makeCreateRequest(metadata_zk_path, statement_to, zkutil::CreateMode::Persistent));
|
|
}
|
|
txn->addOp(zkutil::makeCreateRequest(metadata_zk_path_to, statement, zkutil::CreateMode::Persistent));
|
|
}
|
|
|
|
std::lock_guard lock{metadata_mutex};
|
|
UInt64 new_digest = tables_metadata_digest;
|
|
new_digest -= DB::getMetadataHash(table_name, statement);
|
|
new_digest += DB::getMetadataHash(to_table_name, statement);
|
|
if (exchange)
|
|
{
|
|
new_digest -= DB::getMetadataHash(to_table_name, statement_to);
|
|
new_digest += DB::getMetadataHash(table_name, statement_to);
|
|
}
|
|
if (txn)
|
|
txn->addOp(zkutil::makeSetRequest(replica_path + "/digest", toString(new_digest), -1));
|
|
|
|
DatabaseAtomic::renameTable(local_context, table_name, to_database, to_table_name, exchange, dictionary);
|
|
tables_metadata_digest = new_digest;
|
|
assert(checkDigestValid(local_context));
|
|
}
|
|
|
|
void DatabaseReplicated::commitCreateTable(const ASTCreateQuery & query, const StoragePtr & table,
|
|
const String & table_metadata_tmp_path, const String & table_metadata_path,
|
|
ContextPtr query_context)
|
|
{
|
|
auto txn = query_context->getZooKeeperMetadataTransaction();
|
|
assert(!ddl_worker->isCurrentlyActive() || txn);
|
|
|
|
String statement = getObjectDefinitionFromCreateQuery(query.clone());
|
|
if (txn && txn->isInitialQuery() && !txn->isCreateOrReplaceQuery())
|
|
{
|
|
String metadata_zk_path = zookeeper_path + "/metadata/" + escapeForFileName(query.getTable());
|
|
/// zk::multi(...) will throw if `metadata_zk_path` exists
|
|
txn->addOp(zkutil::makeCreateRequest(metadata_zk_path, statement, zkutil::CreateMode::Persistent));
|
|
}
|
|
|
|
std::lock_guard lock{metadata_mutex};
|
|
UInt64 new_digest = tables_metadata_digest;
|
|
new_digest += DB::getMetadataHash(query.getTable(), statement);
|
|
if (txn && !txn->isCreateOrReplaceQuery())
|
|
txn->addOp(zkutil::makeSetRequest(replica_path + "/digest", toString(new_digest), -1));
|
|
|
|
DatabaseAtomic::commitCreateTable(query, table, table_metadata_tmp_path, table_metadata_path, query_context);
|
|
tables_metadata_digest = new_digest;
|
|
assert(checkDigestValid(query_context));
|
|
}
|
|
|
|
void DatabaseReplicated::commitAlterTable(const StorageID & table_id,
|
|
const String & table_metadata_tmp_path, const String & table_metadata_path,
|
|
const String & statement, ContextPtr query_context)
|
|
{
|
|
auto txn = query_context->getZooKeeperMetadataTransaction();
|
|
assert(!ddl_worker->isCurrentlyActive() || txn);
|
|
if (txn && txn->isInitialQuery())
|
|
{
|
|
String metadata_zk_path = zookeeper_path + "/metadata/" + escapeForFileName(table_id.table_name);
|
|
txn->addOp(zkutil::makeSetRequest(metadata_zk_path, statement, -1));
|
|
}
|
|
|
|
std::lock_guard lock{metadata_mutex};
|
|
UInt64 new_digest = tables_metadata_digest;
|
|
new_digest -= getMetadataHash(table_id.table_name);
|
|
new_digest += DB::getMetadataHash(table_id.table_name, statement);
|
|
if (txn)
|
|
txn->addOp(zkutil::makeSetRequest(replica_path + "/digest", toString(new_digest), -1));
|
|
|
|
DatabaseAtomic::commitAlterTable(table_id, table_metadata_tmp_path, table_metadata_path, statement, query_context);
|
|
tables_metadata_digest = new_digest;
|
|
assert(checkDigestValid(query_context));
|
|
}
|
|
|
|
void DatabaseReplicated::detachTablePermanently(ContextPtr local_context, const String & table_name)
|
|
{
|
|
auto txn = local_context->getZooKeeperMetadataTransaction();
|
|
assert(!ddl_worker->isCurrentlyActive() || txn);
|
|
if (txn && txn->isInitialQuery())
|
|
{
|
|
/// We have to remove metadata from zookeeper, because we do not distinguish permanently detached tables
|
|
/// from attached tables when recovering replica.
|
|
String metadata_zk_path = zookeeper_path + "/metadata/" + escapeForFileName(table_name);
|
|
txn->addOp(zkutil::makeRemoveRequest(metadata_zk_path, -1));
|
|
}
|
|
|
|
std::lock_guard lock{metadata_mutex};
|
|
UInt64 new_digest = tables_metadata_digest;
|
|
new_digest -= getMetadataHash(table_name);
|
|
if (txn)
|
|
txn->addOp(zkutil::makeSetRequest(replica_path + "/digest", toString(new_digest), -1));
|
|
|
|
DatabaseAtomic::detachTablePermanently(local_context, table_name);
|
|
tables_metadata_digest = new_digest;
|
|
assert(checkDigestValid(local_context));
|
|
}
|
|
|
|
void DatabaseReplicated::removeDetachedPermanentlyFlag(ContextPtr local_context, const String & table_name, const String & table_metadata_path, bool attach)
|
|
{
|
|
auto txn = local_context->getZooKeeperMetadataTransaction();
|
|
assert(!ddl_worker->isCurrentlyActive() || txn);
|
|
if (txn && txn->isInitialQuery() && attach)
|
|
{
|
|
String metadata_zk_path = zookeeper_path + "/metadata/" + escapeForFileName(table_name);
|
|
String statement = readMetadataFile(table_name);
|
|
txn->addOp(zkutil::makeCreateRequest(metadata_zk_path, statement, zkutil::CreateMode::Persistent));
|
|
}
|
|
|
|
std::lock_guard lock{metadata_mutex};
|
|
UInt64 new_digest = tables_metadata_digest;
|
|
if (attach)
|
|
{
|
|
new_digest += getMetadataHash(table_name);
|
|
if (txn)
|
|
txn->addOp(zkutil::makeSetRequest(replica_path + "/digest", toString(new_digest), -1));
|
|
}
|
|
|
|
DatabaseAtomic::removeDetachedPermanentlyFlag(local_context, table_name, table_metadata_path, attach);
|
|
tables_metadata_digest = new_digest;
|
|
assert(checkDigestValid(local_context));
|
|
}
|
|
|
|
|
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String DatabaseReplicated::readMetadataFile(const String & table_name) const
|
|
{
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|
String statement;
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ReadBufferFromFile in(getObjectMetadataPath(table_name), METADATA_FILE_BUFFER_SIZE);
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|
readStringUntilEOF(statement, in);
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|
return statement;
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|
}
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|
|
|
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std::vector<std::pair<ASTPtr, StoragePtr>>
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DatabaseReplicated::getTablesForBackup(const FilterByNameFunction & filter, const ContextPtr &) const
|
|
{
|
|
/// Here we read metadata from ZooKeeper. We could do that by simple call of DatabaseAtomic::getTablesForBackup() however
|
|
/// reading from ZooKeeper is better because thus we won't be dependent on how fast the replication queue of this database is.
|
|
std::vector<std::pair<ASTPtr, StoragePtr>> res;
|
|
auto zookeeper = getContext()->getZooKeeper();
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|
auto escaped_table_names = zookeeper->getChildren(zookeeper_path + "/metadata");
|
|
for (const auto & escaped_table_name : escaped_table_names)
|
|
{
|
|
String table_name = unescapeForFileName(escaped_table_name);
|
|
if (!filter(table_name))
|
|
continue;
|
|
|
|
String zk_metadata;
|
|
if (!zookeeper->tryGet(zookeeper_path + "/metadata/" + escaped_table_name, zk_metadata))
|
|
throw Exception(ErrorCodes::INCONSISTENT_METADATA_FOR_BACKUP, "Metadata for table {} was not found in ZooKeeper", table_name);
|
|
|
|
ParserCreateQuery parser;
|
|
auto create_table_query = parseQuery(parser, zk_metadata, 0, getContext()->getSettingsRef().max_parser_depth);
|
|
|
|
auto & create = create_table_query->as<ASTCreateQuery &>();
|
|
create.attach = false;
|
|
create.setTable(table_name);
|
|
create.setDatabase(getDatabaseName());
|
|
|
|
StoragePtr storage;
|
|
if (create.uuid != UUIDHelpers::Nil)
|
|
{
|
|
storage = DatabaseCatalog::instance().tryGetByUUID(create.uuid).second;
|
|
if (storage)
|
|
storage->adjustCreateQueryForBackup(create_table_query);
|
|
}
|
|
|
|
/// `storage` is allowed to be null here. In this case it means that this storage exists on other replicas
|
|
/// but it has not been created on this replica yet.
|
|
|
|
res.emplace_back(create_table_query, storage);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
void DatabaseReplicated::createTableRestoredFromBackup(
|
|
const ASTPtr & create_table_query,
|
|
ContextMutablePtr local_context,
|
|
std::shared_ptr<IRestoreCoordination> restore_coordination,
|
|
UInt64 timeout_ms)
|
|
{
|
|
/// Because of the replication multiple nodes can try to restore the same tables again and failed with "Table already exists"
|
|
/// because of some table could be restored already on other node and then replicated to this node.
|
|
/// To solve this problem we use the restore coordination: the first node calls
|
|
/// IRestoreCoordination::acquireCreatingTableInReplicatedDatabase() and then for other nodes this function returns false which means
|
|
/// this table is already being created by some other node.
|
|
String table_name = create_table_query->as<const ASTCreateQuery &>().getTable();
|
|
if (restore_coordination->acquireCreatingTableInReplicatedDatabase(getZooKeeperPath(), table_name))
|
|
{
|
|
DatabaseAtomic::createTableRestoredFromBackup(create_table_query, local_context, restore_coordination, timeout_ms);
|
|
}
|
|
|
|
/// Wait until the table is actually created no matter if it's created by the current or another node and replicated to the
|
|
/// current node afterwards. We have to wait because `RestorerFromBackup` is going to restore data of the table then.
|
|
/// TODO: The following code doesn't look very reliable, probably we need to rewrite it somehow.
|
|
auto timeout = std::chrono::milliseconds{timeout_ms};
|
|
auto start_time = std::chrono::steady_clock::now();
|
|
while (!isTableExist(table_name, local_context))
|
|
{
|
|
waitForReplicaToProcessAllEntries(50);
|
|
|
|
auto elapsed = std::chrono::steady_clock::now() - start_time;
|
|
if (elapsed > timeout)
|
|
throw Exception(ErrorCodes::CANNOT_RESTORE_TABLE,
|
|
"Couldn't restore table {}.{} on other node or sync it (elapsed {})",
|
|
backQuoteIfNeed(getDatabaseName()), backQuoteIfNeed(table_name), to_string(elapsed));
|
|
}
|
|
}
|
|
|
|
bool DatabaseReplicated::shouldReplicateQuery(const ContextPtr & query_context, const ASTPtr & query_ptr) const
|
|
{
|
|
if (query_context->getClientInfo().is_replicated_database_internal)
|
|
return false;
|
|
|
|
/// Some ALTERs are not replicated on database level
|
|
if (const auto * alter = query_ptr->as<const ASTAlterQuery>())
|
|
{
|
|
return !alter->isAttachAlter() && !alter->isFetchAlter() && !alter->isDropPartitionAlter();
|
|
}
|
|
|
|
/// DROP DATABASE is not replicated
|
|
if (const auto * drop = query_ptr->as<const ASTDropQuery>())
|
|
{
|
|
return drop->table.get();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
}
|