#include <userver/storages/clickhouse/cluster.hpp>
Interface for executing queries on a cluster of ClickHouse servers.
Usually retrieved from components::ClickHouse component.
Definition at line 36 of file cluster.hpp.
Classes | |
| class | NoAvailablePoolError |
| Exception that is thrown if all specified endpoints are unavailable. More... | |
Public Member Functions | |
| Cluster (clients::dns::Resolver &resolver, const impl::ClickhouseSettings &settings, const components::ComponentConfig &config) | |
| ~Cluster () | |
| Cluster destructor. | |
| Cluster (const Cluster &)=delete | |
| template<typename... Args> | |
| ExecutionResult | Execute (const Query &query, const Args &... args) const |
| Execute a statement at some host of the cluster with args as query parameters. | |
| template<typename... Args> | |
| ExecutionResult | Execute (OptionalCommandControl, const Query &query, const Args &... args) const |
| Execute a statement with specified command control settings at some host of the cluster with args as query parameters. | |
| template<typename T > | |
| void | Insert (const std::string &table_name, const std::vector< std::string_view > &column_names, const T &data) const |
Insert data at some host of the cluster; T is expected to be a struct of vectors of same length. | |
| template<typename T > | |
| void | Insert (OptionalCommandControl, const std::string &table_name, const std::vector< std::string_view > &column_names, const T &data) const |
Insert data with specified command control settings at some host of the cluster; T is expected to be a struct of vectors of same length. | |
| template<typename Container > | |
| void | InsertRows (const std::string &table_name, const std::vector< std::string_view > &column_names, const Container &data) const |
Insert data at some host of the cluster; Container is expected to be an iterable of clickhouse-mapped type. | |
| template<typename Container > | |
| void | InsertRows (OptionalCommandControl, const std::string &table_name, const std::vector< std::string_view > &column_names, const Container &data) const |
Insert data with specified command control settings at some host of the cluster; Container is expected to be an iterable of clickhouse-mapped type. | |
| void | WriteStatistics (::utils::statistics::Writer &writer) const |
| Write cluster statistics. | |
| storages::clickhouse::Cluster::Cluster | ( | clients::dns::Resolver & | resolver, |
| const impl::ClickhouseSettings & | settings, | ||
| const components::ComponentConfig & | config ) |
Cluster constructor
| resolver | asynchronous DNS resolver |
| settings | struct with settings fields: endpoints - list of endpoints (host + port) auth_settings - authentication settings (user, password, database) |
| config | components::ClickHouse component config |
| ExecutionResult storages::clickhouse::Cluster::Execute | ( | const Query & | query, |
| const Args &... | args ) const |
Execute a statement at some host of the cluster with args as query parameters.
Definition at line 179 of file cluster.hpp.
| ExecutionResult storages::clickhouse::Cluster::Execute | ( | OptionalCommandControl | optional_cc, |
| const Query & | query, | ||
| const Args &... | args ) const |
Execute a statement with specified command control settings at some host of the cluster with args as query parameters.
Definition at line 185 of file cluster.hpp.
| void storages::clickhouse::Cluster::Insert | ( | const std::string & | table_name, |
| const std::vector< std::string_view > & | column_names, | ||
| const T & | data ) const |
Insert data at some host of the cluster; T is expected to be a struct of vectors of same length.
| table_name | table to insert into |
| column_names | names of columns of the table |
| data | data to insert See clickhouse_io for better understanding of T's requirements. |
Definition at line 141 of file cluster.hpp.
| void storages::clickhouse::Cluster::Insert | ( | OptionalCommandControl | optional_cc, |
| const std::string & | table_name, | ||
| const std::vector< std::string_view > & | column_names, | ||
| const T & | data ) const |
Insert data with specified command control settings at some host of the cluster; T is expected to be a struct of vectors of same length.
| table_name | table to insert into |
| column_names | names of columns of the table |
| data | data to insert See clickhouse_io for better understanding of T's requirements. |
Definition at line 148 of file cluster.hpp.
| void storages::clickhouse::Cluster::InsertRows | ( | const std::string & | table_name, |
| const std::vector< std::string_view > & | column_names, | ||
| const Container & | data ) const |
Insert data at some host of the cluster; Container is expected to be an iterable of clickhouse-mapped type.
| table_name | table to insert into |
| column_names | names of columns of the table |
| data | data to insert See clickhouse_io for better understanding of Container::value_type's requirements. |
Insert (it makes 2 copies of data instead of just 1 copy) due to implementation details, so consider using less convenient but more performant analogue if performance is a concern. Definition at line 159 of file cluster.hpp.
| void storages::clickhouse::Cluster::InsertRows | ( | OptionalCommandControl | optional_cc, |
| const std::string & | table_name, | ||
| const std::vector< std::string_view > & | column_names, | ||
| const Container & | data ) const |
Insert data with specified command control settings at some host of the cluster; Container is expected to be an iterable of clickhouse-mapped type.
| table_name | table to insert into |
| column_names | names of columns of the table |
| data | data to insert See clickhouse_io for better understanding of Container::value_type's requirements. |
Insert (it makes 2 copies of data instead of just 1 copy) due to implementation details, so consider using less convenient but more performant analogue if performance is a concern. Definition at line 166 of file cluster.hpp.