Class: ActiveRecord::ConnectionAdapters::ClickhouseAdapter
- Inherits:
-
AbstractAdapter
- Object
- AbstractAdapter
- ActiveRecord::ConnectionAdapters::ClickhouseAdapter
- Includes:
- ActiveRecord::ConnectionAdapters::Clickhouse::Quoting, ActiveRecord::ConnectionAdapters::Clickhouse::SchemaStatements
- Defined in:
- lib/active_record/connection_adapters/clickhouse_adapter.rb
Constant Summary collapse
- ADAPTER_NAME =
'Clickhouse'.freeze
- NATIVE_DATABASE_TYPES =
{ string: { name: 'String' }, integer: { name: 'UInt32' }, big_integer: { name: 'UInt64' }, float: { name: 'Float32' }, decimal: { name: 'Decimal' }, datetime: { name: 'DateTime' }, datetime64: { name: 'DateTime64' }, date: { name: 'Date' }, boolean: { name: 'Bool' }, uuid: { name: 'UUID' }, enum8: { name: 'Enum8' }, enum16: { name: 'Enum16' }, int8: { name: 'Int8' }, int16: { name: 'Int16' }, int32: { name: 'Int32' }, int64: { name: 'Int64' }, int128: { name: 'Int128' }, int256: { name: 'Int256' }, uint8: { name: 'UInt8' }, uint16: { name: 'UInt16' }, uint32: { name: 'UInt32' }, uint64: { name: 'UInt64' }, # uint128: { name: 'UInt128' }, not yet implemented in clickhouse uint256: { name: 'UInt256' }, }.freeze
Constants included from ActiveRecord::ConnectionAdapters::Clickhouse::SchemaStatements
ActiveRecord::ConnectionAdapters::Clickhouse::SchemaStatements::DEFAULT_RESPONSE_FORMAT
Class Method Summary collapse
-
.extract_limit(sql_type) ⇒ Object
:nodoc:.
- .extract_precision(sql_type) ⇒ Object
-
.extract_scale(sql_type) ⇒ Object
‘extract_scale` and `extract_precision` are the same as in the Rails abstract base class, except this permits a space after the comma.
-
.initialize_type_map(m) ⇒ Object
:nodoc:.
Instance Method Summary collapse
- #add_column(table_name, column_name, type, **options) ⇒ Object
-
#add_index(table_name, expression, **options) ⇒ Object
Adds index description to tables metadata.
- #apply_cluster(sql) ⇒ Object
-
#arel_visitor ⇒ Object
:nodoc:.
-
#build_insert_sql(insert) ⇒ Object
:nodoc:.
- #change_column(table_name, column_name, type, **options) ⇒ Object
- #change_column_default(table_name, column_name, default) ⇒ Object
- #change_column_null(table_name, column_name, null, default = nil) ⇒ Object
-
#clear_index(table_name, name, if_exists: false, partition: nil) ⇒ Object
Deletes the secondary index files from disk without removing description.
- #cluster ⇒ Object
-
#column_name_for_operation(operation, node) ⇒ Object
:nodoc:.
-
#create_database(name) ⇒ Object
Create a new ClickHouse database.
- #create_function(name, body) ⇒ Object
-
#create_savepoint(name) ⇒ Object
Savepoints are not supported, noop.
-
#create_schema_dumper(options) ⇒ Object
:nodoc:.
- #create_table(table_name, **options, &block) ⇒ Object
- #create_view(table_name, **options) {|td| ... } ⇒ Object
- #database ⇒ Object
- #database_engine_atomic? ⇒ Boolean
-
#drop_database(name) ⇒ Object
Drops a ClickHouse database.
- #drop_function(name, options = {}) ⇒ Object
- #drop_functions ⇒ Object
-
#drop_table(table_name, options = {}) ⇒ Object
:nodoc:.
- #exec_rollback_to_savepoint(name) ⇒ Object
-
#initialize(config_or_deprecated_connection, deprecated_logger = nil, deprecated_connection_options = nil, deprecated_config = nil) ⇒ ClickhouseAdapter
constructor
Initializes and connects a Clickhouse adapter.
- #migrations_paths ⇒ Object
-
#native_database_types ⇒ Object
:nodoc:.
-
#primary_keys(table_name) ⇒ Object
SCHEMA STATEMENTS ========================================.
- #quote(value) ⇒ Object
-
#quoted_date(value) ⇒ Object
Quoting time without microseconds.
-
#rebuild_index(table_name, name, if_exists: false, partition: nil) ⇒ Object
Rebuilds the secondary index name for the specified partition_name.
- #release_savepoint(name) ⇒ Object
- #remove_column(table_name, column_name, type = nil, **options) ⇒ Object
-
#remove_index(table_name, name) ⇒ Object
Removes index description from tables metadata and deletes index files from disk.
- #rename_table(table_name, new_name) ⇒ Object
- #replica ⇒ Object
- #replica_path(table) ⇒ Object
-
#server_version ⇒ Object
Return ClickHouse server version.
- #show_create_table(table) ⇒ String
- #supports_indexes_in_create? ⇒ Boolean
- #supports_insert_on_duplicate_skip? ⇒ Boolean
- #supports_insert_on_duplicate_update? ⇒ Boolean
-
#type_map ⇒ Object
In Rails 7 used constant TYPE_MAP, we need redefine method.
- #use_default_replicated_merge_tree_params? ⇒ Boolean
- #use_replica? ⇒ Boolean
- #valid_type?(type) ⇒ Boolean
Methods included from ActiveRecord::ConnectionAdapters::Clickhouse::SchemaStatements
#add_index_options, #assume_migrated_upto_version, #data_sources, #do_execute, #do_system_execute, #exec_delete, #exec_insert, #exec_insert_all, #exec_update, #execute, #functions, #indexes, #internal_exec_query, #internal_metadata, #migration_context, #schema_migration, #show_create_function, #table_options, #tables, #views, #with_yaml_fallback
Constructor Details
#initialize(config_or_deprecated_connection, deprecated_logger = nil, deprecated_connection_options = nil, deprecated_config = nil) ⇒ ClickhouseAdapter
Initializes and connects a Clickhouse adapter.
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 117 def initialize(config_or_deprecated_connection, deprecated_logger = nil, = nil, deprecated_config = nil) super if @config[:connection] connection = { connection: @config[:connection] } else port = @config[:port] || 8123 connection = { host: @config[:host] || 'localhost', port: port, ssl: @config[:ssl].present? ? @config[:ssl] : port == 443, sslca: @config[:sslca], read_timeout: @config[:read_timeout], write_timeout: @config[:write_timeout], keep_alive_timeout: @config[:keep_alive_timeout] } end @connection_parameters = connection @connection_config = { user: @config[:username], password: @config[:password], database: @config[:database] }.compact @debug = @config[:debug] || false @prepared_statements = false connect end |
Class Method Details
.extract_limit(sql_type) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 181 def extract_limit(sql_type) # :nodoc: case sql_type when /(Nullable)?\(?String\)?/ super('String') when /(Nullable)?\(?U?Int8\)?/ 1 when /(Nullable)?\(?U?Int16\)?/ 2 when /(Nullable)?\(?U?Int32\)?/ nil when /(Nullable)?\(?U?Int64\)?/ 8 else super end end |
.extract_precision(sql_type) ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 208 def extract_precision(sql_type) $1.to_i if sql_type =~ /\((\d+)(,\s?\d+)?\)/ end |
.extract_scale(sql_type) ⇒ Object
‘extract_scale` and `extract_precision` are the same as in the Rails abstract base class, except this permits a space after the comma
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 201 def extract_scale(sql_type) case sql_type when /\((\d+)\)/ then 0 when /\((\d+)(,\s?(\d+))\)/ then $3.to_i end end |
.initialize_type_map(m) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 212 def initialize_type_map(m) # :nodoc: super register_class_with_limit m, %r(String), Type::String register_class_with_limit m, 'Date', Clickhouse::OID::Date register_class_with_precision m, %r(datetime)i, Clickhouse::OID::DateTime register_class_with_limit m, %r(Int8), Type::Integer register_class_with_limit m, %r(Int16), Type::Integer register_class_with_limit m, %r(Int32), Type::Integer register_class_with_limit m, %r(Int64), Type::Integer register_class_with_limit m, %r(Int128), Type::Integer register_class_with_limit m, %r(Int256), Type::Integer register_class_with_limit m, %r(UInt8), Type::UnsignedInteger register_class_with_limit m, %r(UInt16), Type::UnsignedInteger register_class_with_limit m, %r(UInt32), Type::UnsignedInteger register_class_with_limit m, %r(UInt64), Type::UnsignedInteger #register_class_with_limit m, %r(UInt128), Type::UnsignedInteger #not implemnted in clickhouse register_class_with_limit m, %r(UInt256), Type::UnsignedInteger m.register_type %r(bool)i, ActiveModel::Type::Boolean.new m.register_type %r{uuid}i, Clickhouse::OID::Uuid.new # register_class_with_limit m, %r(Array), Clickhouse::OID::Array m.register_type(%r(Array)) do |sql_type| Clickhouse::OID::Array.new(sql_type) end m.register_type(%r(Map)) do |sql_type| Clickhouse::OID::Map.new(sql_type) end end |
Instance Method Details
#add_column(table_name, column_name, type, **options) ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 403 def add_column(table_name, column_name, type, **) return if [:if_not_exists] == true && column_exists?(table_name, column_name, type) at = create_alter_table table_name at.add_column(column_name, type, **) execute(schema_creation.accept(at), nil, settings: {wait_end_of_query: 1, send_progress_in_http_headers: 1}) end |
#add_index(table_name, expression, **options) ⇒ Object
Adds index description to tables metadata
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 434 def add_index(table_name, expression, **) index = (apply_cluster(table_name), expression, **) execute schema_creation.accept(CreateIndexDefinition.new(index)) end |
#apply_cluster(sql) ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 495 def apply_cluster(sql) if cluster normalized_cluster_name = cluster.start_with?('{') ? "'#{cluster}'" : cluster "#{sql} ON CLUSTER #{normalized_cluster_name}" else sql end end |
#arel_visitor ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 164 def arel_visitor # :nodoc: Arel::Visitors::Clickhouse.new(self) end |
#build_insert_sql(insert) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 513 def build_insert_sql(insert) # :nodoc: sql = +"INSERT #{insert.into} #{insert.values_list}" sql end |
#change_column(table_name, column_name, type, **options) ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 417 def change_column(table_name, column_name, type, **) result = do_execute("ALTER TABLE #{quote_table_name(table_name)} #{change_column_for_alter(table_name, column_name, type, **)}", nil, settings: {wait_end_of_query: 1, send_progress_in_http_headers: 1}) raise "Error parse json response: #{result}" if result.presence && !result.is_a?(Hash) end |
#change_column_default(table_name, column_name, default) ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 428 def change_column_default(table_name, column_name, default) change_column table_name, column_name, nil, {default: default}.compact end |
#change_column_null(table_name, column_name, null, default = nil) ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 422 def change_column_null(table_name, column_name, null, default = nil) structure = table_structure(table_name).select{|v| v[0] == column_name.to_s}.first raise "Column #{column_name} not found in table #{table_name}" if structure.nil? change_column table_name, column_name, structure[1].gsub(/(Nullable\()?(.*?)\)?/, '\2'), {null: null, default: default}.compact end |
#clear_index(table_name, name, if_exists: false, partition: nil) ⇒ Object
Deletes the secondary index files from disk without removing description
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 456 def clear_index(table_name, name, if_exists: false, partition: nil) query = [apply_cluster("ALTER TABLE #{quote_table_name(table_name)}")] query << 'CLEAR INDEX' query << 'IF EXISTS' if if_exists query << quote_column_name(name) query << "IN PARTITION #{quote_column_name(partition)}" if partition execute query.join(' ') end |
#cluster ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 465 def cluster @config[:cluster_name] end |
#column_name_for_operation(operation, node) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 274 def column_name_for_operation(operation, node) # :nodoc: visitor.compile(node) end |
#create_database(name) ⇒ Object
Create a new ClickHouse database.
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 306 def create_database(name) sql = apply_cluster "CREATE DATABASE #{quote_table_name(name)}" log_with_debug(sql, adapter_name) do res = @connection.post("/?#{@connection_config.except(:database).to_param}", sql) process_response(res, DEFAULT_RESPONSE_FORMAT) end end |
#create_function(name, body) ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 354 def create_function(name, body) fd = "CREATE FUNCTION #{apply_cluster(quote_table_name(name))} AS #{body}" do_execute(fd, format: nil) end |
#create_savepoint(name) ⇒ Object
Savepoints are not supported, noop
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 151 def create_savepoint(name) end |
#create_schema_dumper(options) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 295 def create_schema_dumper() # :nodoc: ClickhouseActiverecord::SchemaDumper.create(self, ) end |
#create_table(table_name, **options, &block) ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 327 def create_table(table_name, **, &block) = apply_replica(table_name, ) td = create_table_definition(apply_cluster(table_name), **) block.call td if block_given? # support old migration version: in 5.0 options id: :integer, but 7.1 options empty # todo remove auto add id column in future if (!.key?(:id) || [:id].present? && [:id] != false) && td[:id].blank? && [:as].blank? td.column(:id, [:id] || :integer, null: false) end if [:force] drop_table(table_name, .merge(if_exists: true)) end do_execute(schema_creation.accept(td), format: nil) if [:with_distributed] distributed_table_name = .delete(:with_distributed) sharding_key = .delete(:sharding_key) || 'rand()' raise 'Set a cluster' unless cluster = "Distributed(#{cluster}, #{@connection_config[:database]}, #{table_name}, #{sharding_key})" create_table(distributed_table_name, **.merge(options: ), &block) end end |
#create_view(table_name, **options) {|td| ... } ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 314 def create_view(table_name, **) .merge!(view: true) = apply_replica(table_name, ) td = create_table_definition(apply_cluster(table_name), **) yield td if block_given? if [:force] drop_table(table_name, .merge(if_exists: true)) end do_execute(schema_creation.accept(td), format: nil) end |
#database ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 473 def database @config[:database] end |
#database_engine_atomic? ⇒ Boolean
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 489 def database_engine_atomic? current_database_engine = "select engine from system.databases where name = '#{@connection_config[:database]}'" res = select_one(current_database_engine) res['engine'] == 'Atomic' if res end |
#drop_database(name) ⇒ Object
Drops a ClickHouse database.
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 360 def drop_database(name) #:nodoc: sql = apply_cluster "DROP DATABASE IF EXISTS #{quote_table_name(name)}" log_with_debug(sql, adapter_name) do res = @connection.post("/?#{@connection_config.except(:database).to_param}", sql) process_response(res, DEFAULT_RESPONSE_FORMAT) end end |
#drop_function(name, options = {}) ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 393 def drop_function(name, = {}) query = "DROP FUNCTION" query = "#{query} IF EXISTS " if [:if_exists] query = "#{query} #{quote_table_name(name)}" query = apply_cluster(query) query = "#{query} SYNC" if [:sync] do_execute(query, format: nil) end |
#drop_functions ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 368 def drop_functions functions.each do |function| drop_function(function) end end |
#drop_table(table_name, options = {}) ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 378 def drop_table(table_name, = {}) # :nodoc: query = "DROP TABLE" query = "#{query} IF EXISTS " if [:if_exists] query = "#{query} #{quote_table_name(table_name)}" query = apply_cluster(query) query = "#{query} SYNC" if [:sync] do_execute(query) if [:with_distributed] distributed_table_name = .delete(:with_distributed) drop_table(distributed_table_name, **) end end |
#exec_rollback_to_savepoint(name) ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 154 def exec_rollback_to_savepoint(name) end |
#migrations_paths ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 160 def migrations_paths @config[:migrations_paths] || 'db/migrate_clickhouse' end |
#native_database_types ⇒ Object
:nodoc:
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 168 def native_database_types #:nodoc: NATIVE_DATABASE_TYPES end |
#primary_keys(table_name) ⇒ Object
SCHEMA STATEMENTS ========================================
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 284 def primary_keys(table_name) if server_version.to_f >= 23.4 structure = do_system_execute("SHOW COLUMNS FROM `#{table_name}`") return structure['data'].select {|m| m[3]&.include?('PRI') }.pluck(0) end pk = table_structure(table_name).first return ['id'] if pk.present? && pk[0] == 'id' [] end |
#quote(value) ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 250 def quote(value) case value when Array '[' + value.map { |v| quote(v) }.join(', ') + ']' when Hash '{' + value.map { |k, v| "#{quote(k)}: #{quote(v)}" }.join(', ') + '}' else super end end |
#quoted_date(value) ⇒ Object
Quoting time without microseconds
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 262 def quoted_date(value) if value.acts_like?(:time) zone_conversion_method = ActiveRecord.default_timezone == :utc ? :getutc : :getlocal if value.respond_to?(zone_conversion_method) value = value.send(zone_conversion_method) end end value.to_fs(:db) end |
#rebuild_index(table_name, name, if_exists: false, partition: nil) ⇒ Object
Rebuilds the secondary index name for the specified partition_name
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 446 def rebuild_index(table_name, name, if_exists: false, partition: nil) query = [apply_cluster("ALTER TABLE #{quote_table_name(table_name)}")] query << 'MATERIALIZE INDEX' query << 'IF EXISTS' if if_exists query << quote_column_name(name) query << "IN PARTITION #{quote_column_name(partition)}" if partition execute query.join(' ') end |
#release_savepoint(name) ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 157 def release_savepoint(name) end |
#remove_column(table_name, column_name, type = nil, **options) ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 411 def remove_column(table_name, column_name, type = nil, **) return if [:if_exists] == true && !column_exists?(table_name, column_name) execute("ALTER TABLE #{quote_table_name(table_name)} #{remove_column_for_alter(table_name, column_name, type, **)}", nil, settings: {wait_end_of_query: 1, send_progress_in_http_headers: 1}) end |
#remove_index(table_name, name) ⇒ Object
Removes index description from tables metadata and deletes index files from disk
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 440 def remove_index(table_name, name) query = apply_cluster("ALTER TABLE #{quote_table_name(table_name)}") execute "#{query} DROP INDEX #{quote_column_name(name)}" end |
#rename_table(table_name, new_name) ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 374 def rename_table(table_name, new_name) do_execute apply_cluster "RENAME TABLE #{quote_table_name(table_name)} TO #{quote_table_name(new_name)}" end |
#replica ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 469 def replica @config[:replica_name] end |
#replica_path(table) ⇒ Object
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 485 def replica_path(table) "/clickhouse/tables/#{cluster}/#{@connection_config[:database]}.#{table}" end |
#server_version ⇒ Object
Return ClickHouse server version
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 146 def server_version @server_version ||= do_system_execute('SELECT version()')['data'][0][0] end |
#show_create_table(table) ⇒ String
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 301 def show_create_table(table) do_system_execute("SHOW CREATE TABLE `#{table}`")['data'].try(:first).try(:first).gsub(/[\n\s]+/m, ' ').gsub("#{@config[:database]}.", "") end |
#supports_indexes_in_create? ⇒ Boolean
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 176 def supports_indexes_in_create? true end |
#supports_insert_on_duplicate_skip? ⇒ Boolean
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 505 def supports_insert_on_duplicate_skip? true end |
#supports_insert_on_duplicate_update? ⇒ Boolean
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 509 def supports_insert_on_duplicate_update? true end |
#type_map ⇒ Object
In Rails 7 used constant TYPE_MAP, we need redefine method
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 246 def type_map @type_map ||= Type::TypeMap.new.tap { |m| ClickhouseAdapter.initialize_type_map(m) } end |
#use_default_replicated_merge_tree_params? ⇒ Boolean
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 477 def use_default_replicated_merge_tree_params? database_engine_atomic? && @config[:use_default_replicated_merge_tree_params] end |
#use_replica? ⇒ Boolean
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 481 def use_replica? (replica || use_default_replicated_merge_tree_params?) && cluster end |
#valid_type?(type) ⇒ Boolean
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# File 'lib/active_record/connection_adapters/clickhouse_adapter.rb', line 172 def valid_type?(type) !native_database_types[type].nil? end |