diff options
Diffstat (limited to 'activerecord/lib/active_record')
20 files changed, 276 insertions, 178 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb index 3c872d6c1b..6aacbe5f88 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb @@ -142,11 +142,6 @@ module ActiveRecord exec_query(sql, name, binds) end - # Executes the truncate statement. - def truncate(table_name, name = nil) - raise NotImplementedError - end - # Executes update +sql+ statement in the context of this connection using # +binds+ as the bind substitutes. +name+ is logged along with # the executed +sql+ statement. @@ -181,6 +176,23 @@ module ActiveRecord exec_delete(sql, name, binds) end + # Executes the truncate statement. + def truncate(table_name, name = nil) + execute(build_truncate_statements(table_name), name) + end + + def truncate_tables(*table_names) # :nodoc: + return if table_names.empty? + + with_multi_statements do + disable_referential_integrity do + Array(build_truncate_statements(*table_names)).each do |sql| + execute_batch(sql, "Truncate Tables") + end + end + end + end + # Runs the given block in a database transaction, and returns the result # of the block. # @@ -341,46 +353,20 @@ module ActiveRecord # We keep this method to provide fallback # for databases like sqlite that do not support bulk inserts. def insert_fixture(fixture, table_name) - fixture = fixture.stringify_keys - - columns = schema_cache.columns_hash(table_name) - binds = fixture.map do |name, value| - if column = columns[name] - type = lookup_cast_type_from_column(column) - Relation::QueryAttribute.new(name, value, type) - else - raise Fixture::FixtureError, %(table "#{table_name}" has no column named #{name.inspect}.) - end - end - - table = Arel::Table.new(table_name) - - values = binds.map do |bind| - value = with_yaml_fallback(bind.value_for_database) - [table[bind.name], value] - end - - manager = Arel::InsertManager.new - manager.into(table) - manager.insert(values) - execute manager.to_sql, "Fixture Insert" + execute(build_fixture_sql(Array.wrap(fixture), table_name), "Fixture Insert") end def insert_fixtures_set(fixture_set, tables_to_delete = []) - fixture_inserts = fixture_set.map do |table_name, fixtures| - next if fixtures.empty? - - build_fixture_sql(fixtures, table_name) - end.compact - - table_deletes = tables_to_delete.map { |table| +"DELETE FROM #{quote_table_name table}" } - total_sql = Array.wrap(combine_multi_statements(table_deletes + fixture_inserts)) - - disable_referential_integrity do - transaction(requires_new: true) do - total_sql.each do |sql| - execute sql, "Fixtures Load" - yield if block_given? + fixture_inserts = build_fixture_statements(fixture_set) + table_deletes = tables_to_delete.map { |table| "DELETE FROM #{quote_table_name(table)}" } + total_sql = Array(combine_multi_statements(table_deletes + fixture_inserts)) + + with_multi_statements do + disable_referential_integrity do + transaction(requires_new: true) do + total_sql.each do |sql| + execute_batch(sql, "Fixtures Load") + end end end end @@ -416,14 +402,21 @@ module ActiveRecord end private + def execute_batch(sql, name = nil) + execute(sql, name) + end + + DEFAULT_INSERT_VALUE = Arel.sql("DEFAULT").freeze + private_constant :DEFAULT_INSERT_VALUE + def default_insert_value(column) - Arel.sql("DEFAULT") + DEFAULT_INSERT_VALUE end def build_fixture_sql(fixtures, table_name) columns = schema_cache.columns_hash(table_name) - values = fixtures.map do |fixture| + values_list = fixtures.map do |fixture| fixture = fixture.stringify_keys unknown_columns = fixture.keys - columns.keys @@ -445,12 +438,43 @@ module ActiveRecord table = Arel::Table.new(table_name) manager = Arel::InsertManager.new manager.into(table) - columns.each_key { |column| manager.columns << table[column] } - manager.values = manager.create_values_list(values) + if values_list.size == 1 + values = values_list.shift + new_values = [] + columns.each_key.with_index { |column, i| + unless values[i].equal?(DEFAULT_INSERT_VALUE) + new_values << values[i] + manager.columns << table[column] + end + } + values_list << new_values + else + columns.each_key { |column| manager.columns << table[column] } + end + + manager.values = manager.create_values_list(values_list) manager.to_sql end + def build_fixture_statements(fixture_set) + fixture_set.map do |table_name, fixtures| + next if fixtures.empty? + build_fixture_sql(fixtures, table_name) + end.compact + end + + def build_truncate_statements(*table_names) + truncate_tables = table_names.map do |table_name| + "TRUNCATE TABLE #{quote_table_name(table_name)}" + end + combine_multi_statements(truncate_tables) + end + + def with_multi_statements + yield + end + def combine_multi_statements(total_sql) total_sql.join(";\n") end diff --git a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb index eefe621feb..2877530917 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb @@ -138,15 +138,19 @@ module ActiveRecord "'#{quote_string(value.to_s)}'" end - def type_casted_binds(binds) # :nodoc: - if binds.first.is_a?(Array) - binds.map { |column, value| type_cast(value, column) } - else - binds.map { |attr| type_cast(attr.value_for_database) } - end + def sanitize_as_sql_comment(value) # :nodoc: + value.to_s.gsub(%r{ (/ (?: | \g<1>) \*) \+? \s* | \s* (\* (?: | \g<2>) /) }x, "") end private + def type_casted_binds(binds) + if binds.first.is_a?(Array) + binds.map { |column, value| type_cast(value, column) } + else + binds.map { |attr| type_cast(attr.value_for_database) } + end + end + def lookup_cast_type(sql_type) type_map.lookup(sql_type) end diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb index 202187a047..7aad306d50 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb @@ -384,6 +384,11 @@ module ActiveRecord false end + # Does this adapter support optimizer hints? + def supports_optimizer_hints? + false + end + def supports_lazy_transactions? false end diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb index a518b897a0..8ca2cfa9ed 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb @@ -103,6 +103,11 @@ module ActiveRecord mariadb? || version >= "5.7.5" end + # See https://dev.mysql.com/doc/refman/8.0/en/optimizer-hints.html for more details. + def supports_optimizer_hints? + !mariadb? && version >= "5.7.7" + end + def supports_advisory_locks? true end @@ -269,10 +274,6 @@ module ActiveRecord show_variable "collation_database" end - def truncate(table_name, name = nil) - execute "TRUNCATE TABLE #{quote_table_name(table_name)}", name - end - def table_comment(table_name) # :nodoc: scope = quoted_scope(table_name) @@ -511,12 +512,6 @@ module ActiveRecord index.using == :btree || super end - def insert_fixtures_set(fixture_set, tables_to_delete = []) - with_multi_statements do - super { discard_remaining_results } - end - end - def build_insert_sql(insert) # :nodoc: sql = +"INSERT #{insert.into} #{insert.values_list}" @@ -538,33 +533,6 @@ module ActiveRecord end end - def combine_multi_statements(total_sql) - total_sql.each_with_object([]) do |sql, total_sql_chunks| - previous_packet = total_sql_chunks.last - sql << ";\n" - if max_allowed_packet_reached?(sql, previous_packet) || total_sql_chunks.empty? - total_sql_chunks << sql - else - previous_packet << sql - end - end - end - - def max_allowed_packet_reached?(current_packet, previous_packet) - if current_packet.bytesize > max_allowed_packet - raise ActiveRecordError, "Fixtures set is too large #{current_packet.bytesize}. Consider increasing the max_allowed_packet variable." - elsif previous_packet.nil? - false - else - (current_packet.bytesize + previous_packet.bytesize) > max_allowed_packet - end - end - - def max_allowed_packet - bytes_margin = 2 - @max_allowed_packet ||= (show_variable("max_allowed_packet") - bytes_margin) - end - def initialize_type_map(m = type_map) super diff --git a/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb b/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb index 6adcc14545..1199c0ad1b 100644 --- a/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb @@ -11,7 +11,7 @@ module ActiveRecord else super end - discard_remaining_results + @connection.abandon_results! result end @@ -69,22 +69,31 @@ module ActiveRecord alias :exec_update :exec_delete private + def execute_batch(sql, name = nil) + super + @connection.abandon_results! + end + def default_insert_value(column) - Arel.sql("DEFAULT") unless column.auto_increment? + super unless column.auto_increment? end def last_inserted_id(result) @connection.last_id end - def discard_remaining_results - @connection.abandon_results! - end - def supports_set_server_option? @connection.respond_to?(:set_server_option) end + def build_truncate_statements(*table_names) + if table_names.size == 1 + super.first + else + super + end + end + def multi_statements_enabled?(flags) if flags.is_a?(Array) flags.include?("MULTI_STATEMENTS") @@ -117,6 +126,36 @@ module ActiveRecord end end + def combine_multi_statements(total_sql) + total_sql.each_with_object([]) do |sql, total_sql_chunks| + previous_packet = total_sql_chunks.last + if max_allowed_packet_reached?(sql, previous_packet) + total_sql_chunks << +sql + else + previous_packet << ";\n" + previous_packet << sql + end + end + end + + def max_allowed_packet_reached?(current_packet, previous_packet) + if current_packet.bytesize > max_allowed_packet + raise ActiveRecordError, + "Fixtures set is too large #{current_packet.bytesize}. Consider increasing the max_allowed_packet variable." + elsif previous_packet.nil? + true + else + (current_packet.bytesize + previous_packet.bytesize) > max_allowed_packet + end + end + + def max_allowed_packet + @max_allowed_packet ||= begin + bytes_margin = 2 + show_variable("max_allowed_packet") - bytes_margin + end + end + def exec_stmt_and_free(sql, name, binds, cache_stmt: false) if preventing_writes? && write_query?(sql) raise ActiveRecord::ReadOnlyError, "Write query attempted while in readonly mode: #{sql}" diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb b/activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb index 41633872e2..ae7dbd2868 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb @@ -164,6 +164,10 @@ module ActiveRecord end private + def build_truncate_statements(*table_names) + "TRUNCATE TABLE #{table_names.map(&method(:quote_table_name)).join(", ")}" + end + # Returns the current ID of a table's sequence. def last_insert_id_result(sequence_name) exec_query("SELECT currval(#{quote(sequence_name)})", "SQL") diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb index 672f11cfcb..29f764e8f4 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb @@ -259,10 +259,6 @@ module ActiveRecord @use_insert_returning = @config.key?(:insert_returning) ? self.class.type_cast_config_to_boolean(@config[:insert_returning]) : true end - def truncate(table_name, name = nil) - exec_query "TRUNCATE TABLE #{quote_table_name(table_name)}", name, [] - end - # Is this connection alive and ready for queries? def active? @lock.synchronize do @@ -351,6 +347,13 @@ module ActiveRecord postgresql_version >= 90400 end + def supports_optimizer_hints? + unless defined?(@has_pg_hint_plan) + @has_pg_hint_plan = extension_available?("pg_hint_plan") + end + @has_pg_hint_plan + end + def supports_lazy_transactions? true end @@ -381,9 +384,12 @@ module ActiveRecord } end + def extension_available?(name) + query_value("SELECT true FROM pg_available_extensions WHERE name = #{quote(name)}", "SCHEMA") + end + def extension_enabled?(name) - res = exec_query("SELECT EXISTS(SELECT * FROM pg_available_extensions WHERE name = '#{name}' AND installed_version IS NOT NULL) as enabled", "SCHEMA") - res.cast_values.first + query_value("SELECT installed_version IS NOT NULL FROM pg_available_extensions WHERE name = #{quote(name)}", "SCHEMA") end def extensions diff --git a/activerecord/lib/active_record/connection_adapters/schema_cache.rb b/activerecord/lib/active_record/connection_adapters/schema_cache.rb index 5b598620d3..07453b4403 100644 --- a/activerecord/lib/active_record/connection_adapters/schema_cache.rb +++ b/activerecord/lib/active_record/connection_adapters/schema_cache.rb @@ -114,6 +114,17 @@ module ActiveRecord @indexes.delete name end + def marshal_dump + # if we get current version during initialization, it happens stack over flow. + @version = connection.migration_context.current_version + [@version, @columns, @columns_hash, @primary_keys, @data_sources, @indexes] + end + + def marshal_load(array) + @version, @columns, @columns_hash, @primary_keys, @data_sources, @indexes = array + @indexes = @indexes || {} + end + private def prepare_data_sources connection.data_sources.each { |source| @data_sources[source] = true } diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3/database_statements.rb b/activerecord/lib/active_record/connection_adapters/sqlite3/database_statements.rb new file mode 100644 index 0000000000..84dcae49b9 --- /dev/null +++ b/activerecord/lib/active_record/connection_adapters/sqlite3/database_statements.rb @@ -0,0 +1,38 @@ +# frozen_string_literal: true + +module ActiveRecord + module ConnectionAdapters + module SQLite3 + module DatabaseStatements + private + def execute_batch(sql, name = nil) + if preventing_writes? && write_query?(sql) + raise ActiveRecord::ReadOnlyError, "Write query attempted while in readonly mode: #{sql}" + end + + materialize_transactions + + log(sql, name) do + ActiveSupport::Dependencies.interlock.permit_concurrent_loads do + @connection.execute_batch(sql) + end + end + end + + def build_fixture_statements(fixture_set) + fixture_set.flat_map do |table_name, fixtures| + next if fixtures.empty? + fixtures.map { |fixture| build_fixture_sql([fixture], table_name) } + end.compact + end + + def build_truncate_statements(*table_names) + truncate_tables = table_names.map do |table_name| + "DELETE FROM #{quote_table_name(table_name)}" + end + combine_multi_statements(truncate_tables) + end + end + end + end +end diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb index 3004caf82d..ff23a525b9 100644 --- a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb @@ -4,6 +4,7 @@ require "active_record/connection_adapters/abstract_adapter" require "active_record/connection_adapters/statement_pool" require "active_record/connection_adapters/sqlite3/explain_pretty_printer" require "active_record/connection_adapters/sqlite3/quoting" +require "active_record/connection_adapters/sqlite3/database_statements" require "active_record/connection_adapters/sqlite3/schema_creation" require "active_record/connection_adapters/sqlite3/schema_definitions" require "active_record/connection_adapters/sqlite3/schema_dumper" @@ -58,6 +59,7 @@ module ActiveRecord include SQLite3::Quoting include SQLite3::SchemaStatements + include SQLite3::DatabaseStatements NATIVE_DATABASE_TYPES = { primary_key: "integer PRIMARY KEY AUTOINCREMENT NOT NULL", @@ -155,10 +157,6 @@ module ActiveRecord @connection.close rescue nil end - def truncate(table_name, name = nil) - execute "DELETE FROM #{quote_table_name(table_name)}", name - end - def supports_index_sort_order? true end @@ -386,18 +384,6 @@ module ActiveRecord end end - def insert_fixtures_set(fixture_set, tables_to_delete = []) - disable_referential_integrity do - transaction(requires_new: true) do - tables_to_delete.each { |table| delete "DELETE FROM #{quote_table_name(table)}", "Fixture Delete" } - - fixture_set.each do |table_name, rows| - rows.each { |row| insert_fixture(row, table_name) } - end - end - end - end - def build_insert_sql(insert) # :nodoc: sql = +"INSERT #{insert.into} #{insert.values_list}" diff --git a/activerecord/lib/active_record/database_configurations.rb b/activerecord/lib/active_record/database_configurations.rb index a6c702cbbc..4656045fe5 100644 --- a/activerecord/lib/active_record/database_configurations.rb +++ b/activerecord/lib/active_record/database_configurations.rb @@ -106,7 +106,7 @@ module ActiveRecord build_db_config = configs.each_pair.flat_map do |env_name, config| walk_configs(env_name.to_s, "primary", config) - end.compact + end.flatten.compact if url = ENV["DATABASE_URL"] build_url_config(url, build_db_config) diff --git a/activerecord/lib/active_record/gem_version.rb b/activerecord/lib/active_record/gem_version.rb index 345441eea8..f77bc2e3c1 100644 --- a/activerecord/lib/active_record/gem_version.rb +++ b/activerecord/lib/active_record/gem_version.rb @@ -10,7 +10,7 @@ module ActiveRecord MAJOR = 6 MINOR = 0 TINY = 0 - PRE = "beta2" + PRE = "beta3" STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".") end diff --git a/activerecord/lib/active_record/insert_all.rb b/activerecord/lib/active_record/insert_all.rb index 5baaea344b..98c98d61cd 100644 --- a/activerecord/lib/active_record/insert_all.rb +++ b/activerecord/lib/active_record/insert_all.rb @@ -2,12 +2,14 @@ module ActiveRecord class InsertAll - attr_reader :model, :connection, :inserts, :on_duplicate, :returning, :unique_by + attr_reader :model, :connection, :inserts, :keys + attr_reader :on_duplicate, :returning, :unique_by def initialize(model, inserts, on_duplicate:, returning: nil, unique_by: nil) raise ArgumentError, "Empty list of attributes passed" if inserts.blank? - @model, @connection, @inserts, @on_duplicate, @returning, @unique_by = model, model.connection, inserts, on_duplicate, returning, unique_by + @model, @connection, @inserts, @keys = model, model.connection, inserts, inserts.first.keys.map(&:to_s).to_set + @on_duplicate, @returning, @unique_by = on_duplicate, returning, unique_by @returning = (connection.supports_insert_returning? ? primary_keys : false) if @returning.nil? @returning = false if @returning == [] @@ -21,10 +23,6 @@ module ActiveRecord connection.exec_query to_sql, "Bulk Insert" end - def keys - inserts.first.keys.map(&:to_s) - end - def updatable_columns keys - readonly_columns - unique_by_columns end @@ -37,6 +35,17 @@ module ActiveRecord on_duplicate == :update end + def map_key_with_value + inserts.map do |attributes| + attributes = attributes.stringify_keys + verify_attributes(attributes) + + keys.map do |key| + yield key, attributes[key] + end + end + end + private def ensure_valid_options_for_connection! if returning && !connection.supports_insert_returning? @@ -76,6 +85,12 @@ module ActiveRecord Array.wrap(model.primary_key) end + def verify_attributes(attributes) + if keys != attributes.keys.to_set + raise ArgumentError, "All objects being inserted must have the same keys" + end + end + class Builder attr_reader :model @@ -91,21 +106,11 @@ module ActiveRecord end def values_list - columns = connection.schema_cache.columns_hash(model.table_name) - keys = insert_all.keys.to_set - types = keys.map { |key| [ key, connection.lookup_cast_type_from_column(columns[key]) ] }.to_h - - values_list = insert_all.inserts.map do |attributes| - attributes = attributes.stringify_keys + types = extract_types_from_columns_on(model.table_name, keys: insert_all.keys) - unless attributes.keys.to_set == keys - raise ArgumentError, "All objects being inserted must have the same keys" - end - - keys.map do |key| - bind = Relation::QueryAttribute.new(key, attributes[key], types[key]) - connection.with_yaml_fallback(bind.value_for_database) - end + values_list = insert_all.map_key_with_value do |key, value| + bind = Relation::QueryAttribute.new(key, value, types[key]) + connection.with_yaml_fallback(bind.value_for_database) end Arel::InsertManager.new.create_values_list(values_list).to_sql @@ -133,6 +138,15 @@ module ActiveRecord quote_columns(insert_all.keys).join(",") end + def extract_types_from_columns_on(table_name, keys:) + columns = connection.schema_cache.columns_hash(table_name) + + unknown_column = (keys - columns.keys).first + raise UnknownAttributeError.new(model.new, unknown_column) if unknown_column + + keys.map { |key| [ key, connection.lookup_cast_type_from_column(columns[key]) ] }.to_h + end + def quote_columns(columns) columns.map(&connection.method(:quote_column_name)) end diff --git a/activerecord/lib/active_record/querying.rb b/activerecord/lib/active_record/querying.rb index 7a8d0cb663..86021f0a80 100644 --- a/activerecord/lib/active_record/querying.rb +++ b/activerecord/lib/active_record/querying.rb @@ -14,7 +14,7 @@ module ActiveRecord :find_each, :find_in_batches, :in_batches, :select, :reselect, :order, :reorder, :group, :limit, :offset, :joins, :left_joins, :left_outer_joins, :where, :rewhere, :preload, :eager_load, :includes, :from, :lock, :readonly, :extending, :or, - :having, :create_with, :distinct, :references, :none, :unscope, :merge, :except, :only, + :having, :create_with, :distinct, :references, :none, :unscope, :optimizer_hints, :merge, :except, :only, :count, :average, :minimum, :maximum, :sum, :calculate, :pluck, :pick, :ids ].freeze # :nodoc: diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb index d612ff53c1..6d954a2b2e 100644 --- a/activerecord/lib/active_record/relation.rb +++ b/activerecord/lib/active_record/relation.rb @@ -5,7 +5,7 @@ module ActiveRecord class Relation MULTI_VALUE_METHODS = [:includes, :eager_load, :preload, :select, :group, :order, :joins, :left_outer_joins, :references, - :extending, :unscope] + :extending, :unscope, :optimizer_hints] SINGLE_VALUE_METHODS = [:limit, :offset, :lock, :readonly, :reordering, :reverse_order, :distinct, :create_with, :skip_query_cache] @@ -197,6 +197,10 @@ module ActiveRecord # if a DELETE between those two statements is run by another client. But for most applications, # that's a significantly less likely condition to hit. # * It relies on exception handling to handle control flow, which may be marginally slower. + # * The primary key may auto-increment on each create, even if it fails. This can accelerate + # the problem of running out of integers, if the underlying table is still stuck on a primary + # key of type int (note: All Rails apps since 5.1+ have defaulted to bigint, which is not liable + # to this problem). # # This method will return a record if all given attributes are covered by unique constraints # (unless the INSERT -> DELETE -> SELECT race condition is triggered), but if creation was attempted @@ -338,6 +342,8 @@ module ActiveRecord # trigger Active Record callbacks or validations. However, values passed to #update_all will still go through # Active Record's normal type casting and serialization. # + # Note: As Active Record callbacks are not triggered, this method will not automatically update +updated_at+/+updated_on+ columns. + # # ==== Parameters # # * +updates+ - A string, array, or hash representing the SET part of an SQL statement. @@ -412,10 +418,10 @@ module ActiveRecord update_all updates end - # Touches all records in the current relation without instantiating records first with the updated_at/on attributes + # Touches all records in the current relation without instantiating records first with the +updated_at+/+updated_on+ attributes # set to the current time or the time specified. # This method can be passed attribute names and an optional time argument. - # If attribute names are passed, they are updated along with updated_at/on attributes. + # If attribute names are passed, they are updated along with +updated_at+/+updated_on+ attributes. # If no time argument is passed, the current time is used as default. # # === Examples diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb index 0f2cff4c9c..05ea0850d3 100644 --- a/activerecord/lib/active_record/relation/query_methods.rb +++ b/activerecord/lib/active_record/relation/query_methods.rb @@ -350,7 +350,7 @@ module ActiveRecord VALID_UNSCOPING_VALUES = Set.new([:where, :select, :group, :order, :lock, :limit, :offset, :joins, :left_outer_joins, - :includes, :from, :readonly, :having]) + :includes, :from, :readonly, :having, :optimizer_hints]) # Removes an unwanted relation that is already defined on a chain of relations. # This is useful when passing around chains of relations and would like to @@ -901,6 +901,29 @@ module ActiveRecord self end + # Specify optimizer hints to be used in the SELECT statement. + # + # Example (for MySQL): + # + # Topic.optimizer_hints("MAX_EXECUTION_TIME(50000)", "NO_INDEX_MERGE(topics)") + # # SELECT /*+ MAX_EXECUTION_TIME(50000) NO_INDEX_MERGE(topics) */ `topics`.* FROM `topics` + # + # Example (for PostgreSQL with pg_hint_plan): + # + # Topic.optimizer_hints("SeqScan(topics)", "Parallel(topics 8)") + # # SELECT /*+ SeqScan(topics) Parallel(topics 8) */ "topics".* FROM "topics" + def optimizer_hints(*args) + check_if_method_has_arguments!(:optimizer_hints, args) + spawn.optimizer_hints!(*args) + end + + def optimizer_hints!(*args) # :nodoc: + args.flatten! + + self.optimizer_hints_values += args + self + end + # Reverse the existing order clause on the relation. # # User.order('name ASC').reverse_order # generated SQL has 'ORDER BY name DESC' @@ -977,6 +1000,7 @@ module ActiveRecord build_select(arel) + arel.optimizer_hints(*optimizer_hints_values) unless optimizer_hints_values.empty? arel.distinct(distinct_value) arel.from(build_from) unless from_clause.empty? arel.lock(lock_value) if lock_value diff --git a/activerecord/lib/active_record/tasks/database_tasks.rb b/activerecord/lib/active_record/tasks/database_tasks.rb index a8433fa0db..155d2b0b98 100644 --- a/activerecord/lib/active_record/tasks/database_tasks.rb +++ b/activerecord/lib/active_record/tasks/database_tasks.rb @@ -185,14 +185,15 @@ module ActiveRecord def truncate_tables(configuration) ActiveRecord::Base.connected_to(database: { truncation: configuration }) do table_names = ActiveRecord::Base.connection.tables - internal_table_names = [ + table_names -= [ ActiveRecord::Base.schema_migrations_table_name, ActiveRecord::Base.internal_metadata_table_name ] - class_for_adapter(configuration["adapter"]).new(configuration).truncate_tables(*table_names.without(*internal_table_names)) + ActiveRecord::Base.connection.truncate_tables(*table_names) end end + private :truncate_tables def truncate_all(environment = env) ActiveRecord::Base.configurations.configs_for(env_name: environment).each do |db_config| diff --git a/activerecord/lib/active_record/tasks/mysql_database_tasks.rb b/activerecord/lib/active_record/tasks/mysql_database_tasks.rb index f2b4ead98d..1c1b29b5e1 100644 --- a/activerecord/lib/active_record/tasks/mysql_database_tasks.rb +++ b/activerecord/lib/active_record/tasks/mysql_database_tasks.rb @@ -31,16 +31,6 @@ module ActiveRecord connection.recreate_database configuration["database"], creation_options end - def truncate_tables(*table_names) - return if table_names.empty? - - ActiveRecord::Base.connection.disable_referential_integrity do - table_names.each do |table_name| - ActiveRecord::Base.connection.truncate(table_name) - end - end - end - def charset connection.charset end diff --git a/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb b/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb index dc368eb97d..8acb11f75f 100644 --- a/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb +++ b/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb @@ -48,18 +48,6 @@ module ActiveRecord create true end - def truncate_tables(*table_names) - return if table_names.empty? - - ActiveRecord::Base.connection.disable_referential_integrity do - quoted_table_names = table_names.map do |table_name| - ActiveRecord::Base.connection.quote_table_name(table_name) - end - - ActiveRecord::Base.connection.execute "TRUNCATE TABLE #{quoted_table_names.join(", ")}" - end - end - def structure_dump(filename, extra_flags) set_psql_env diff --git a/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb b/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb index cedbae6b7f..a82cea80ca 100644 --- a/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb +++ b/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb @@ -33,16 +33,6 @@ module ActiveRecord create end - def truncate_tables(*table_names) - return if table_names.empty? - - ActiveRecord::Base.connection.disable_referential_integrity do - table_names.each do |table_name| - ActiveRecord::Base.connection.truncate(table_name) - end - end - end - def charset connection.encoding end |