diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters')
43 files changed, 580 insertions, 166 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb b/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb index 68498b5dc5..36001efdd5 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb @@ -3,6 +3,7 @@ require "thread" require "concurrent/map" require "monitor" +require "weakref" module ActiveRecord # Raised when a connection could not be obtained within the connection @@ -19,6 +20,26 @@ module ActiveRecord end module ConnectionAdapters + module AbstractPool # :nodoc: + def get_schema_cache(connection) + @schema_cache ||= SchemaCache.new(connection) + @schema_cache.connection = connection + @schema_cache + end + + def set_schema_cache(cache) + @schema_cache = cache + end + end + + class NullPool # :nodoc: + include ConnectionAdapters::AbstractPool + + def initialize + @schema_cache = nil + end + end + # Connection pool base class for managing Active Record database # connections. # @@ -146,7 +167,6 @@ module ActiveRecord end private - def internal_poll(timeout) no_wait_poll || (timeout && wait_poll(timeout)) end @@ -294,23 +314,50 @@ module ActiveRecord @frequency = frequency end + @mutex = Mutex.new + @pools = {} + + class << self + def register_pool(pool, frequency) # :nodoc: + @mutex.synchronize do + unless @pools.key?(frequency) + @pools[frequency] = [] + spawn_thread(frequency) + end + @pools[frequency] << WeakRef.new(pool) + end + end + + private + def spawn_thread(frequency) + Thread.new(frequency) do |t| + loop do + sleep t + @mutex.synchronize do + @pools[frequency].select!(&:weakref_alive?) + @pools[frequency].each do |p| + p.reap + p.flush + rescue WeakRef::RefError + end + end + end + end + end + end + def run return unless frequency && frequency > 0 - Thread.new(frequency, pool) { |t, p| - loop do - sleep t - p.reap - p.flush - end - } + self.class.register_pool(pool, frequency) end end include MonitorMixin include QueryCache::ConnectionPoolConfiguration + include ConnectionAdapters::AbstractPool attr_accessor :automatic_reconnect, :checkout_timeout, :schema_cache - attr_reader :spec, :connections, :size, :reaper + attr_reader :spec, :size, :reaper # Creates a new ConnectionPool object. +spec+ is a ConnectionSpecification # object which describes database connection information (e.g. adapter, @@ -379,7 +426,7 @@ module ActiveRecord # #connection can be called any number of times; the connection is # held in a cache keyed by a thread. def connection - @thread_cached_conns[connection_cache_key(@lock_thread || Thread.current)] ||= checkout + @thread_cached_conns[connection_cache_key(current_thread)] ||= checkout end # Returns true if there is an open connection being used for the current thread. @@ -388,7 +435,7 @@ module ActiveRecord # #connection or #with_connection methods. Connections obtained through # #checkout will not be detected by #active_connection? def active_connection? - @thread_cached_conns[connection_cache_key(Thread.current)] + @thread_cached_conns[connection_cache_key(current_thread)] end # Signal that the thread is finished with the current connection. @@ -423,6 +470,21 @@ module ActiveRecord synchronize { @connections.any? } end + # Returns an array containing the connections currently in the pool. + # Access to the array does not require synchronization on the pool because + # the array is newly created and not retained by the pool. + # + # However; this method bypasses the ConnectionPool's thread-safe connection + # access pattern. A returned connection may be owned by another thread, + # unowned, or by happen-stance owned by the calling thread. + # + # Calling methods on a connection without ownership is subject to the + # thread-safety guarantees of the underlying method. Many of the methods + # on connection adapter classes are inherently multi-thread unsafe. + def connections + synchronize { @connections.dup } + end + # Disconnects all connections in the pool, and clears the pool. # # Raises: @@ -668,6 +730,10 @@ module ActiveRecord thread end + def current_thread + @lock_thread || Thread.current + end + # Take control of all existing connections so a "group" action such as # reload/disconnect can be performed safely. It is no longer enough to # wrap it in +synchronize+ because some pool's actions are allowed @@ -809,7 +875,6 @@ module ActiveRecord def new_connection Base.send(spec.adapter_method, spec.config).tap do |conn| - conn.schema_cache = schema_cache.dup if schema_cache conn.check_version end end @@ -938,15 +1003,30 @@ module ActiveRecord end end + attr_reader :prevent_writes + def initialize # These caches are keyed by spec.name (ConnectionSpecification#name). @owner_to_pool = ConnectionHandler.create_owner_to_pool + @prevent_writes = false # Backup finalizer: if the forked child never needed a pool, the above # early discard has not occurred ObjectSpace.define_finalizer self, ConnectionHandler.unowned_pool_finalizer(@owner_to_pool) end + # Prevent writing to the database regardless of role. + # + # In some cases you may want to prevent writes to the database + # even if you are on a database that can write. `while_preventing_writes` + # will prevent writes to the database for the duration of the block. + def while_preventing_writes + original, @prevent_writes = @prevent_writes, true + yield + ensure + @prevent_writes = original + end + def connection_pool_list owner_to_pool.values.compact end @@ -1064,7 +1144,6 @@ module ActiveRecord end private - def owner_to_pool @owner_to_pool[Process.pid] end diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb index 75e959045e..d932f068f2 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb @@ -1,7 +1,5 @@ # frozen_string_literal: true -require "active_support/deprecation" - module ActiveRecord module ConnectionAdapters # :nodoc: module DatabaseLimits diff --git a/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb b/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb index a7753e3e9c..768122b4d2 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb @@ -33,17 +33,17 @@ module ActiveRecord end def enable_query_cache! - @query_cache_enabled[connection_cache_key(Thread.current)] = true + @query_cache_enabled[connection_cache_key(current_thread)] = true connection.enable_query_cache! if active_connection? end def disable_query_cache! - @query_cache_enabled.delete connection_cache_key(Thread.current) + @query_cache_enabled.delete connection_cache_key(current_thread) connection.disable_query_cache! if active_connection? end def query_cache_enabled - @query_cache_enabled[connection_cache_key(Thread.current)] + @query_cache_enabled[connection_cache_key(current_thread)] end end @@ -109,7 +109,6 @@ module ActiveRecord end private - def cache_sql(sql, name, binds) @lock.synchronize do result = diff --git a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb index 2877530917..93273f6cf6 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb @@ -114,16 +114,16 @@ module ActiveRecord # if the value is a Time responding to usec. def quoted_date(value) if value.acts_like?(:time) - zone_conversion_method = ActiveRecord::Base.default_timezone == :utc ? :getutc : :getlocal - - if value.respond_to?(zone_conversion_method) - value = value.send(zone_conversion_method) + if ActiveRecord::Base.default_timezone == :utc + value = value.getutc if value.respond_to?(:getutc) && !value.utc? + else + value = value.getlocal if value.respond_to?(:getlocal) end end result = value.to_s(:db) if value.respond_to?(:usec) && value.usec > 0 - "#{result}.#{sprintf("%06d", value.usec)}" + result << "." << sprintf("%06d", value.usec) else result end @@ -142,6 +142,59 @@ module ActiveRecord value.to_s.gsub(%r{ (/ (?: | \g<1>) \*) \+? \s* | \s* (\* (?: | \g<2>) /) }x, "") end + def column_name_matcher # :nodoc: + COLUMN_NAME + end + + def column_name_with_order_matcher # :nodoc: + COLUMN_NAME_WITH_ORDER + end + + # Regexp for column names (with or without a table name prefix). + # Matches the following: + # + # "#{table_name}.#{column_name}" + # "#{column_name}" + COLUMN_NAME = / + \A + ( + (?: + # table_name.column_name | function(one or no argument) + ((?:\w+\.)?\w+) | \w+\((?:|\g<2>)\) + ) + (?:(?:\s+AS)?\s+\w+)? + ) + (?:\s*,\s*\g<1>)* + \z + /ix + + # Regexp for column names with order (with or without a table name prefix, + # with or without various order modifiers). Matches the following: + # + # "#{table_name}.#{column_name}" + # "#{table_name}.#{column_name} #{direction}" + # "#{table_name}.#{column_name} #{direction} NULLS FIRST" + # "#{table_name}.#{column_name} NULLS LAST" + # "#{column_name}" + # "#{column_name} #{direction}" + # "#{column_name} #{direction} NULLS FIRST" + # "#{column_name} NULLS LAST" + COLUMN_NAME_WITH_ORDER = / + \A + ( + (?: + # table_name.column_name | function(one or no argument) + ((?:\w+\.)?\w+) | \w+\((?:|\g<2>)\) + ) + (?:\s+ASC|\s+DESC)? + (?:\s+NULLS\s+(?:FIRST|LAST))? + ) + (?:\s*,\s*\g<1>)* + \z + /ix + + private_constant :COLUMN_NAME, :COLUMN_NAME_WITH_ORDER + private def type_casted_binds(binds) if binds.first.is_a?(Array) diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb index 7d20825a75..23c993cfc3 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb @@ -19,7 +19,6 @@ module ActiveRecord to: :@conn, private: true private - def visit_AlterTable(o) sql = +"ALTER TABLE #{quote_table_name(o.name)} " sql << o.adds.map { |col| accept col }.join(" ") diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb index 688eea75e8..dbd533b4b3 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb @@ -264,8 +264,7 @@ module ActiveRecord if_not_exists: false, options: nil, as: nil, - comment: nil, - ** + comment: nil ) @conn = conn @columns_hash = {} diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb index 622e00fffb..fb56e712be 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb @@ -15,7 +15,7 @@ module ActiveRecord def column_spec_for_primary_key(column) return {} if default_primary_key?(column) spec = { id: schema_type(column).inspect } - spec.merge!(prepare_column_options(column).except!(:null)) + spec.merge!(prepare_column_options(column).except!(:null, :comment)) spec[:default] ||= "nil" if explicit_primary_key_default?(column) spec end diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb index f97842b3f5..88367c79a1 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb @@ -2,7 +2,6 @@ require "active_record/migration/join_table" require "active_support/core_ext/string/access" -require "active_support/deprecation" require "digest/sha2" module ActiveRecord @@ -101,7 +100,7 @@ module ActiveRecord def index_exists?(table_name, column_name, options = {}) column_names = Array(column_name).map(&:to_s) checks = [] - checks << lambda { |i| i.columns == column_names } + checks << lambda { |i| Array(i.columns) == column_names } checks << lambda { |i| i.unique } if options[:unique] checks << lambda { |i| i.name == options[:name].to_s } if options[:name] @@ -291,25 +290,27 @@ module ActiveRecord # SELECT * FROM orders INNER JOIN line_items ON order_id=orders.id # # See also TableDefinition#column for details on how to create columns. - def create_table(table_name, **options) - td = create_table_definition(table_name, options) + def create_table(table_name, id: :primary_key, primary_key: nil, force: nil, **options) + td = create_table_definition( + table_name, options.extract!(:temporary, :if_not_exists, :options, :as, :comment) + ) - if options[:id] != false && !options[:as] - pk = options.fetch(:primary_key) do - Base.get_primary_key table_name.to_s.singularize - end + if id && !td.as + pk = primary_key || Base.get_primary_key(table_name.to_s.singularize) if pk.is_a?(Array) td.primary_keys pk else - td.primary_key pk, options.fetch(:id, :primary_key), options + td.primary_key pk, id, options end end yield td if block_given? - if options[:force] - drop_table(table_name, options.merge(if_exists: true)) + if force + drop_table(table_name, force: force, if_exists: true) + else + schema_cache.clear_data_source_cache!(table_name.to_s) end result = execute schema_creation.accept td @@ -321,7 +322,7 @@ module ActiveRecord end if supports_comments? && !supports_comments_in_create? - if table_comment = options[:comment].presence + if table_comment = td.comment.presence change_table_comment(table_name, table_comment) end @@ -499,6 +500,7 @@ module ActiveRecord # it can be helpful to provide these in a migration's +change+ method so it can be reverted. # In that case, +options+ and the block will be used by #create_table. def drop_table(table_name, options = {}) + schema_cache.clear_data_source_cache!(table_name.to_s) execute "DROP TABLE#{' IF EXISTS' if options[:if_exists]} #{quote_table_name(table_name)}" end @@ -518,14 +520,15 @@ module ActiveRecord # Available options are (none of these exists by default): # * <tt>:limit</tt> - # Requests a maximum column length. This is the number of characters for a <tt>:string</tt> column - # and number of bytes for <tt>:text</tt>, <tt>:binary</tt> and <tt>:integer</tt> columns. + # and number of bytes for <tt>:text</tt>, <tt>:binary</tt>, and <tt>:integer</tt> columns. # This option is ignored by some backends. # * <tt>:default</tt> - # The column's default value. Use +nil+ for +NULL+. # * <tt>:null</tt> - # Allows or disallows +NULL+ values in the column. # * <tt>:precision</tt> - - # Specifies the precision for the <tt>:decimal</tt> and <tt>:numeric</tt> columns. + # Specifies the precision for the <tt>:decimal</tt>, <tt>:numeric</tt>, + # <tt>:datetime</tt>, and <tt>:time</tt> columns. # * <tt>:scale</tt> - # Specifies the scale for the <tt>:decimal</tt> and <tt>:numeric</tt> columns. # * <tt>:collation</tt> - @@ -1060,8 +1063,8 @@ module ActiveRecord options end - def dump_schema_information #:nodoc: - versions = ActiveRecord::SchemaMigration.all_versions + def dump_schema_information # :nodoc: + versions = schema_migration.all_versions insert_versions_sql(versions) if versions.any? end @@ -1077,7 +1080,7 @@ module ActiveRecord end version = version.to_i - sm_table = quote_table_name(ActiveRecord::SchemaMigration.table_name) + sm_table = quote_table_name(schema_migration.table_name) migrated = migration_context.get_all_versions versions = migration_context.migrations.map(&:version) @@ -1450,7 +1453,7 @@ module ActiveRecord end def insert_versions_sql(versions) - sm_table = quote_table_name(ActiveRecord::SchemaMigration.table_name) + sm_table = quote_table_name(schema_migration.table_name) if versions.is_a?(Array) sql = +"INSERT INTO #{sm_table} (version) VALUES\n" diff --git a/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb b/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb index 7b6321d83b..53ce8df491 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb @@ -5,10 +5,11 @@ module ActiveRecord class TransactionState def initialize(state = nil) @state = state - @children = [] + @children = nil end def add_child(state) + @children ||= [] @children << state end @@ -41,12 +42,12 @@ module ActiveRecord end def rollback! - @children.each { |c| c.rollback! } + @children&.each { |c| c.rollback! } @state = :rolledback end def full_rollback! - @children.each { |c| c.rollback! } + @children&.each { |c| c.rollback! } @state = :fully_rolledback end @@ -75,18 +76,19 @@ module ActiveRecord class Transaction #:nodoc: attr_reader :connection, :state, :records, :savepoint_name, :isolation_level - def initialize(connection, options, run_commit_callbacks: false) + def initialize(connection, isolation: nil, joinable: true, run_commit_callbacks: false) @connection = connection @state = TransactionState.new - @records = [] - @isolation_level = options[:isolation] + @records = nil + @isolation_level = isolation @materialized = false - @joinable = options.fetch(:joinable, true) + @joinable = joinable @run_commit_callbacks = run_commit_callbacks end def add_record(record) - records << record + @records ||= [] + @records << record end def materialize! @@ -98,6 +100,7 @@ module ActiveRecord end def rollback_records + return unless records ite = records.uniq(&:object_id) already_run_callbacks = {} while record = ite.shift @@ -107,16 +110,17 @@ module ActiveRecord record.rolledback!(force_restore_state: full_rollback?, should_run_callbacks: should_run_callbacks) end ensure - ite.each do |i| + ite&.each do |i| i.rolledback!(force_restore_state: full_rollback?, should_run_callbacks: false) end end def before_commit_records - records.uniq.each(&:before_committed!) if @run_commit_callbacks + records.uniq.each(&:before_committed!) if records && @run_commit_callbacks end def commit_records + return unless records ite = records.uniq(&:object_id) already_run_callbacks = {} while record = ite.shift @@ -131,7 +135,7 @@ module ActiveRecord end end ensure - ite.each { |i| i.committed!(should_run_callbacks: false) } + ite&.each { |i| i.committed!(should_run_callbacks: false) } end def full_rollback?; true; end @@ -141,8 +145,8 @@ module ActiveRecord end class SavepointTransaction < Transaction - def initialize(connection, savepoint_name, parent_transaction, *args) - super(connection, *args) + def initialize(connection, savepoint_name, parent_transaction, **options) + super(connection, options) parent_transaction.state.add_child(@state) @@ -202,18 +206,29 @@ module ActiveRecord @lazy_transactions_enabled = true end - def begin_transaction(options = {}) + def begin_transaction(isolation: nil, joinable: true, _lazy: true) @connection.lock.synchronize do run_commit_callbacks = !current_transaction.joinable? transaction = if @stack.empty? - RealTransaction.new(@connection, options, run_commit_callbacks: run_commit_callbacks) + RealTransaction.new( + @connection, + isolation: isolation, + joinable: joinable, + run_commit_callbacks: run_commit_callbacks + ) else - SavepointTransaction.new(@connection, "active_record_#{@stack.size}", @stack.last, options, - run_commit_callbacks: run_commit_callbacks) + SavepointTransaction.new( + @connection, + "active_record_#{@stack.size}", + @stack.last, + isolation: isolation, + joinable: joinable, + run_commit_callbacks: run_commit_callbacks + ) end - if @connection.supports_lazy_transactions? && lazy_transactions_enabled? && options[:_lazy] != false + if @connection.supports_lazy_transactions? && lazy_transactions_enabled? && _lazy @has_unmaterialized_transactions = true else transaction.materialize! @@ -274,9 +289,9 @@ module ActiveRecord end end - def within_new_transaction(options = {}) + def within_new_transaction(isolation: nil, joinable: true) @connection.lock.synchronize do - transaction = begin_transaction options + transaction = begin_transaction(isolation: isolation, joinable: joinable) yield rescue Exception => error if transaction @@ -309,7 +324,6 @@ module ActiveRecord end private - NULL_TRANSACTION = NullTransaction.new # Deallocate invalidated prepared statements outside of the transaction diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb index bf0bb84c93..dc970c384b 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb @@ -6,7 +6,6 @@ require "active_record/connection_adapters/sql_type_metadata" require "active_record/connection_adapters/abstract/schema_dumper" require "active_record/connection_adapters/abstract/schema_creation" require "active_support/concurrency/load_interlock_aware_monitor" -require "active_support/deprecation" require "arel/collectors/bind" require "arel/collectors/composite" require "arel/collectors/sql_string" @@ -78,7 +77,7 @@ module ActiveRecord SIMPLE_INT = /\A\d+\z/ attr_accessor :pool - attr_reader :schema_cache, :visitor, :owner, :logger, :lock, :prepared_statements, :prevent_writes + attr_reader :visitor, :owner, :logger, :lock, :prepared_statements alias :in_use? :owner set_callback :checkin, :after, :enable_lazy_transactions! @@ -106,6 +105,14 @@ module ActiveRecord Regexp.union(*parts) end + def self.quoted_column_names # :nodoc: + @quoted_column_names ||= {} + end + + def self.quoted_table_names # :nodoc: + @quoted_table_names ||= {} + end + def initialize(connection, logger = nil, config = {}) # :nodoc: super() @@ -114,11 +121,8 @@ module ActiveRecord @instrumenter = ActiveSupport::Notifications.instrumenter @logger = logger @config = config - @pool = nil + @pool = ActiveRecord::ConnectionAdapters::NullPool.new @idle_since = Concurrent.monotonic_time - @schema_cache = SchemaCache.new self - @quoted_column_names, @quoted_table_names = {}, {} - @prevent_writes = false @visitor = arel_visitor @statements = build_statement_pool @lock = ActiveSupport::Concurrency::LoadInterlockAwareMonitor.new @@ -144,19 +148,7 @@ module ActiveRecord # Returns true if the connection is a replica, or if +prevent_writes+ # is set to true. def preventing_writes? - replica? || prevent_writes - end - - # Prevent writing to the database regardless of role. - # - # In some cases you may want to prevent writes to the database - # even if you are on a database that can write. `while_preventing_writes` - # will prevent writes to the database for the duration of the block. - def while_preventing_writes - original, @prevent_writes = @prevent_writes, true - yield - ensure - @prevent_writes = original + replica? || ActiveRecord::Base.connection_handler.prevent_writes end def migrations_paths # :nodoc: @@ -164,7 +156,22 @@ module ActiveRecord end def migration_context # :nodoc: - MigrationContext.new(migrations_paths) + MigrationContext.new(migrations_paths, schema_migration) + end + + def schema_migration # :nodoc: + @schema_migration ||= begin + conn = self + spec_name = conn.pool.spec.name + name = "#{spec_name}::SchemaMigration" + + Class.new(ActiveRecord::SchemaMigration) do + define_singleton_method(:name) { name } + define_singleton_method(:to_s) { name } + + self.connection_specification_name = spec_name + end + end end class Version @@ -206,9 +213,13 @@ module ActiveRecord @owner = Thread.current end + def schema_cache + @pool.get_schema_cache(self) + end + def schema_cache=(cache) cache.connection = self - @schema_cache = cache + @pool.set_schema_cache(cache) end # this method must only be called while holding connection pool's mutex @@ -259,6 +270,11 @@ module ActiveRecord self.class::ADAPTER_NAME end + # Does the database for this adapter exist? + def self.database_exists?(config) + raise NotImplementedError + end + # Does this adapter support DDL rollbacks in transactions? That is, would # CREATE TABLE or ALTER TABLE get rolled back by a transaction? def supports_ddl_transactions? @@ -487,6 +503,9 @@ module ActiveRecord # # Prevent @connection's finalizer from touching the socket, or # otherwise communicating with its server, when it is collected. + if schema_cache.connection == self + schema_cache.connection = nil + end end # Reset the state of this connection, directing the DBMS to clear @@ -587,7 +606,6 @@ module ActiveRecord end private - def type_map @type_map ||= Type::TypeMap.new.tap do |mapping| initialize_type_map(mapping) 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 d239ecff89..ef1eef6b69 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb @@ -45,7 +45,6 @@ module ActiveRecord class StatementPool < ConnectionAdapters::StatementPool # :nodoc: private - def dealloc(stmt) stmt.close end @@ -176,15 +175,6 @@ module ActiveRecord # DATABASE STATEMENTS ====================================== #++ - def explain(arel, binds = []) - sql = "EXPLAIN #{to_sql(arel, binds)}" - start = Concurrent.monotonic_time - result = exec_query(sql, "EXPLAIN", binds) - elapsed = Concurrent.monotonic_time - start - - MySQL::ExplainPrettyPrinter.new.pp(result, elapsed) - end - # Executes the SQL statement in the context of this connection. def execute(sql, name = nil) materialize_transactions @@ -298,6 +288,8 @@ module ActiveRecord # Example: # rename_table('octopuses', 'octopi') def rename_table(table_name, new_name) + schema_cache.clear_data_source_cache!(table_name.to_s) + schema_cache.clear_data_source_cache!(new_name.to_s) execute "RENAME TABLE #{quote_table_name(table_name)} TO #{quote_table_name(new_name)}" rename_table_indexes(table_name, new_name) end @@ -318,6 +310,7 @@ module ActiveRecord # it can be helpful to provide these in a migration's +change+ method so it can be reverted. # In that case, +options+ and the block will be used by create_table. def drop_table(table_name, options = {}) + schema_cache.clear_data_source_cache!(table_name.to_s) execute "DROP#{' TEMPORARY' if options[:temporary]} TABLE#{' IF EXISTS' if options[:if_exists]} #{quote_table_name(table_name)}#{' CASCADE' if options[:force] == :cascade}" end @@ -483,12 +476,12 @@ module ActiveRecord # distinct queries, and requires that the ORDER BY include the distinct column. # See https://dev.mysql.com/doc/refman/5.7/en/group-by-handling.html def columns_for_distinct(columns, orders) # :nodoc: - order_columns = orders.reject(&:blank?).map { |s| + order_columns = orders.compact_blank.map { |s| # Convert Arel node to string s = s.to_sql unless s.is_a?(String) # Remove any ASC/DESC modifiers s.gsub(/\s+(?:ASC|DESC)\b/i, "") - }.reject(&:blank?).map.with_index { |column, i| "#{column} AS alias_#{i}" } + }.compact_blank.map.with_index { |column, i| "#{column} AS alias_#{i}" } (order_columns << super).join(", ") end @@ -522,7 +515,6 @@ module ActiveRecord end private - def initialize_type_map(m = type_map) super @@ -627,7 +619,11 @@ module ActiveRecord when ER_QUERY_INTERRUPTED QueryCanceled.new(message, sql: sql, binds: binds) else - super + if exception.is_a?(Mysql2::Error::TimeoutError) + ActiveRecord::AdapterTimeout.new(message, sql: sql, binds: binds) + else + super + end end end @@ -745,7 +741,7 @@ module ActiveRecord end.compact.join(", ") # ...and send them all in one query - execute "SET #{encoding} #{sql_mode_assignment} #{variable_assignments}" + execute("SET #{encoding} #{sql_mode_assignment} #{variable_assignments}", "SCHEMA") end def column_definitions(table_name) # :nodoc: @@ -804,7 +800,6 @@ module ActiveRecord end private - def cast_value(value) case value when true then "1" diff --git a/activerecord/lib/active_record/connection_adapters/column.rb b/activerecord/lib/active_record/connection_adapters/column.rb index 279d0b9e84..2708d2756b 100644 --- a/activerecord/lib/active_record/connection_adapters/column.rb +++ b/activerecord/lib/active_record/connection_adapters/column.rb @@ -5,6 +5,8 @@ module ActiveRecord module ConnectionAdapters # An abstract definition of a column in a table. class Column + include Deduplicable + attr_reader :name, :default, :sql_type_metadata, :null, :default_function, :collation, :comment delegate :precision, :scale, :limit, :type, :sql_type, to: :sql_type_metadata, allow_nil: true @@ -76,6 +78,7 @@ module ActiveRecord def hash Column.hash ^ name.hash ^ + name.encoding.hash ^ default.hash ^ sql_type_metadata.hash ^ null.hash ^ @@ -83,6 +86,17 @@ module ActiveRecord collation.hash ^ comment.hash end + + private + def deduplicated + @name = -name + @sql_type_metadata = sql_type_metadata.deduplicate if sql_type_metadata + @default = -default if default + @default_function = -default_function if default_function + @collation = -collation if collation + @comment = -comment if comment + super + end end class NullColumn < Column diff --git a/activerecord/lib/active_record/connection_adapters/connection_specification.rb b/activerecord/lib/active_record/connection_adapters/connection_specification.rb index 9eaf9d9a89..0732b69f81 100644 --- a/activerecord/lib/active_record/connection_adapters/connection_specification.rb +++ b/activerecord/lib/active_record/connection_adapters/connection_specification.rb @@ -50,13 +50,12 @@ module ActiveRecord # Converts the given URL to a full connection hash. def to_hash - config = raw_config.reject { |_, value| value.blank? } + config = raw_config.compact_blank config.map { |key, value| config[key] = uri_parser.unescape(value) if value.is_a? String } config end private - attr_reader :uri def uri_parser diff --git a/activerecord/lib/active_record/connection_adapters/deduplicable.rb b/activerecord/lib/active_record/connection_adapters/deduplicable.rb new file mode 100644 index 0000000000..fb2fd60bbc --- /dev/null +++ b/activerecord/lib/active_record/connection_adapters/deduplicable.rb @@ -0,0 +1,29 @@ +# frozen_string_literal: true + +module ActiveRecord + module ConnectionAdapters # :nodoc: + module Deduplicable + extend ActiveSupport::Concern + + module ClassMethods + def registry + @registry ||= {} + end + + def new(*) + super.deduplicate + end + end + + def deduplicate + self.class.registry[self] ||= deduplicated + end + alias :-@ :deduplicate + + private + def deduplicated + freeze + end + end + end +end diff --git a/activerecord/lib/active_record/connection_adapters/determine_if_preparable_visitor.rb b/activerecord/lib/active_record/connection_adapters/determine_if_preparable_visitor.rb index 1df4dea2d8..97d74df529 100644 --- a/activerecord/lib/active_record/connection_adapters/determine_if_preparable_visitor.rb +++ b/activerecord/lib/active_record/connection_adapters/determine_if_preparable_visitor.rb @@ -5,7 +5,7 @@ module ActiveRecord module DetermineIfPreparableVisitor attr_accessor :preparable - def accept(*) + def accept(object, collector) @preparable = true super end @@ -20,7 +20,7 @@ module ActiveRecord super end - def visit_Arel_Nodes_SqlLiteral(*) + def visit_Arel_Nodes_SqlLiteral(o, collector) @preparable = false super end 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 2132e5d248..bbcdc96cdc 100644 --- a/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb @@ -26,6 +26,15 @@ module ActiveRecord !READ_QUERY.match?(sql) end + def explain(arel, binds = []) + sql = "EXPLAIN #{to_sql(arel, binds)}" + start = Concurrent.monotonic_time + result = exec_query(sql, "EXPLAIN", binds) + elapsed = Concurrent.monotonic_time - start + + MySQL::ExplainPrettyPrinter.new.pp(result, elapsed) + end + # Executes the SQL statement in the context of this connection. def execute(sql, name = nil) if preventing_writes? && write_query?(sql) diff --git a/activerecord/lib/active_record/connection_adapters/mysql/explain_pretty_printer.rb b/activerecord/lib/active_record/connection_adapters/mysql/explain_pretty_printer.rb index 20c3c83664..edd5ea0542 100644 --- a/activerecord/lib/active_record/connection_adapters/mysql/explain_pretty_printer.rb +++ b/activerecord/lib/active_record/connection_adapters/mysql/explain_pretty_printer.rb @@ -37,7 +37,6 @@ module ActiveRecord end private - def compute_column_widths(result) [].tap do |widths| result.columns.each_with_index do |column, i| diff --git a/activerecord/lib/active_record/connection_adapters/mysql/quoting.rb b/activerecord/lib/active_record/connection_adapters/mysql/quoting.rb index 75564a61d6..0069f5871c 100644 --- a/activerecord/lib/active_record/connection_adapters/mysql/quoting.rb +++ b/activerecord/lib/active_record/connection_adapters/mysql/quoting.rb @@ -5,11 +5,11 @@ module ActiveRecord module MySQL module Quoting # :nodoc: def quote_column_name(name) - @quoted_column_names[name] ||= "`#{super.gsub('`', '``')}`" + self.class.quoted_column_names[name] ||= "`#{super.gsub('`', '``')}`" end def quote_table_name(name) - @quoted_table_names[name] ||= super.gsub(".", "`.`").freeze + self.class.quoted_table_names[name] ||= super.gsub(".", "`.`").freeze end def unquoted_true @@ -32,12 +32,49 @@ module ActiveRecord "x'#{value.hex}'" end - def _type_cast(value) - case value - when Date, Time then value - else super - end + def column_name_matcher + COLUMN_NAME + end + + def column_name_with_order_matcher + COLUMN_NAME_WITH_ORDER end + + COLUMN_NAME = / + \A + ( + (?: + # `table_name`.`column_name` | function(one or no argument) + ((?:\w+\.|`\w+`\.)?(?:\w+|`\w+`)) | \w+\((?:|\g<2>)\) + ) + (?:(?:\s+AS)?\s+(?:\w+|`\w+`))? + ) + (?:\s*,\s*\g<1>)* + \z + /ix + + COLUMN_NAME_WITH_ORDER = / + \A + ( + (?: + # `table_name`.`column_name` | function(one or no argument) + ((?:\w+\.|`\w+`\.)?(?:\w+|`\w+`)) | \w+\((?:|\g<2>)\) + ) + (?:\s+ASC|\s+DESC)? + ) + (?:\s*,\s*\g<1>)* + \z + /ix + + private_constant :COLUMN_NAME, :COLUMN_NAME_WITH_ORDER + + private + def _type_cast(value) + case value + when Date, Time then value + else super + end + end end end end diff --git a/activerecord/lib/active_record/connection_adapters/mysql/schema_creation.rb b/activerecord/lib/active_record/connection_adapters/mysql/schema_creation.rb index 82ed320617..0f5ab7562a 100644 --- a/activerecord/lib/active_record/connection_adapters/mysql/schema_creation.rb +++ b/activerecord/lib/active_record/connection_adapters/mysql/schema_creation.rb @@ -7,7 +7,6 @@ module ActiveRecord delegate :add_sql_comment!, :mariadb?, to: :@conn, private: true private - def visit_DropForeignKey(name) "DROP FOREIGN KEY #{name}" end diff --git a/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb index 234fb25fdf..bcd300f3db 100644 --- a/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb +++ b/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb @@ -41,13 +41,15 @@ module ActiveRecord case column.sql_type when /\Atimestamp\b/ :timestamp + when /\A(?:enum|set)\b/ + column.sql_type else super end end def schema_limit(column) - super unless /\A(?:tiny|medium|long)?(?:text|blob)/.match?(column.sql_type) + super unless /\A(?:enum|set|(?:tiny|medium|long)?(?:text|blob))\b/.match?(column.sql_type) end def schema_precision(column) diff --git a/activerecord/lib/active_record/connection_adapters/mysql/type_metadata.rb b/activerecord/lib/active_record/connection_adapters/mysql/type_metadata.rb index 9167593064..a7232fa249 100644 --- a/activerecord/lib/active_record/connection_adapters/mysql/type_metadata.rb +++ b/activerecord/lib/active_record/connection_adapters/mysql/type_metadata.rb @@ -6,9 +6,11 @@ module ActiveRecord class TypeMetadata < DelegateClass(SqlTypeMetadata) # :nodoc: undef to_yaml if method_defined?(:to_yaml) + include Deduplicable + attr_reader :extra - def initialize(type_metadata, extra: "") + def initialize(type_metadata, extra: nil) super(type_metadata) @extra = extra end @@ -25,6 +27,13 @@ module ActiveRecord __getobj__.hash ^ extra.hash end + + private + def deduplicated + __setobj__(__getobj__.deduplicate) + @extra = -extra if extra + super + end end end end diff --git a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb index 5b0335c22b..1df9ac32c9 100644 --- a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb @@ -8,6 +8,8 @@ require "mysql2" module ActiveRecord module ConnectionHandling # :nodoc: + ER_BAD_DB_ERROR = 1049 + # Establishes a connection to the database that's used by all Active Record objects. def mysql2_connection(config) config = config.symbolize_keys @@ -22,7 +24,7 @@ module ActiveRecord client = Mysql2::Client.new(config) ConnectionAdapters::Mysql2Adapter.new(client, logger, nil, config) rescue Mysql2::Error => error - if error.message.include?("Unknown database") + if error.error_number == ER_BAD_DB_ERROR raise ActiveRecord::NoDatabaseError else raise @@ -42,6 +44,12 @@ module ActiveRecord configure_connection end + def self.database_exists?(config) + !!ActiveRecord::Base.mysql2_connection(config) + rescue ActiveRecord::NoDatabaseError + false + end + def supports_json? !mariadb? && database_version >= "5.7.8" end @@ -109,12 +117,12 @@ module ActiveRecord end def discard! # :nodoc: + super @connection.automatic_close = false @connection = nil end private - def connect @connection = Mysql2::Client.new(@config) configure_connection diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/column.rb b/activerecord/lib/active_record/connection_adapters/postgresql/column.rb index ec25bb1e19..f1ecf6df30 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/column.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/column.rb @@ -23,6 +23,29 @@ module ActiveRecord def sql_type super.sub(/\[\]\z/, "") end + + def init_with(coder) + @serial = coder["serial"] + super + end + + def encode_with(coder) + coder["serial"] = @serial + super + end + + def ==(other) + other.is_a?(Column) && + super && + serial? == other.serial? + end + alias :eql? :== + + def hash + Column.hash ^ + super.hash ^ + serial?.hash + end end end PostgreSQLColumn = PostgreSQL::Column # :nodoc: diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/array.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/array.rb index b1dfbde86e..0bbe98145a 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/array.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/array.rb @@ -77,7 +77,6 @@ module ActiveRecord end private - def type_cast_array(value, method) if value.is_a?(::Array) value.map { |item| type_cast_array(item, method) } diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/enum.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/enum.rb index f70f09ad95..bae34472e1 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/enum.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/enum.rb @@ -10,7 +10,6 @@ module ActiveRecord end private - def cast_value(value) value.to_s end diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/hstore.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/hstore.rb index 7b42677101..8d4dacbd64 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/hstore.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/hstore.rb @@ -46,7 +46,6 @@ module ActiveRecord end private - HstorePair = begin quoted_string = /"[^"\\]*(?:\\.[^"\\]*)*"/ unquoted_string = /(?:\\.|[^\s,])[^\s=,\\]*(?:\\.[^\s=,\\]*|=[^,>])*/ diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/legacy_point.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/legacy_point.rb index 7f6adc351c..e52d4385ef 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/legacy_point.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/legacy_point.rb @@ -34,7 +34,6 @@ module ActiveRecord end private - def number_for_point(number) number.to_s.gsub(/\.0$/, "") end diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/money.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/money.rb index 6434377b57..357493dfc0 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/money.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/money.rb @@ -26,9 +26,9 @@ module ActiveRecord value = value.sub(/^\((.+)\)$/, '-\1') # (4) case value - when /^-?\D+[\d,]+\.\d{2}$/ # (1) + when /^-?\D*[\d,]+\.\d{2}$/ # (1) value.gsub!(/[^-\d.]/, "") - when /^-?\D+[\d.]+,\d{2}$/ # (2) + when /^-?\D*[\d.]+,\d{2}$/ # (2) value.gsub!(/[^-\d,]/, "").sub!(/,/, ".") end diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/point.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/point.rb index 8c74cecc4d..e81e18ff70 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/point.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/point.rb @@ -50,7 +50,6 @@ module ActiveRecord end private - def number_for_point(number) number.to_s.gsub(/\.0$/, "") end diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb index aa7701e038..d19f1f9cf8 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/range.rb @@ -58,7 +58,6 @@ module ActiveRecord end private - def type_cast_single(value) infinity?(value) ? value : @subtype.deserialize(value) end diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/uuid.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/uuid.rb index 28abdbd073..74a28eef58 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/uuid.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/uuid.rb @@ -14,7 +14,6 @@ module ActiveRecord end private - def cast_value(value) casted = value.to_s casted if casted.match?(ACCEPTABLE_UUID) diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb b/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb index d40e0ef1f0..07b66de366 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb @@ -30,7 +30,7 @@ module ActiveRecord # - "schema.name".table_name # - "schema.name"."table.name" def quote_table_name(name) # :nodoc: - @quoted_table_names[name] ||= Utils.extract_schema_qualified_name(name.to_s).quoted.freeze + self.class.quoted_table_names[name] ||= Utils.extract_schema_qualified_name(name.to_s).quoted.freeze end # Quotes schema names for use in SQL queries. @@ -44,7 +44,7 @@ module ActiveRecord # Quotes column names for use in SQL queries. def quote_column_name(name) # :nodoc: - @quoted_column_names[name] ||= PG::Connection.quote_ident(super).freeze + self.class.quoted_column_names[name] ||= PG::Connection.quote_ident(super).freeze end # Quote date/time values for use in SQL input. @@ -78,6 +78,43 @@ module ActiveRecord type_map.lookup(column.oid, column.fmod, column.sql_type) end + def column_name_matcher + COLUMN_NAME + end + + def column_name_with_order_matcher + COLUMN_NAME_WITH_ORDER + end + + COLUMN_NAME = / + \A + ( + (?: + # "table_name"."column_name"::type_name | function(one or no argument)::type_name + ((?:\w+\.|"\w+"\.)?(?:\w+|"\w+")(?:::\w+)?) | \w+\((?:|\g<2>)\)(?:::\w+)? + ) + (?:(?:\s+AS)?\s+(?:\w+|"\w+"))? + ) + (?:\s*,\s*\g<1>)* + \z + /ix + + COLUMN_NAME_WITH_ORDER = / + \A + ( + (?: + # "table_name"."column_name"::type_name | function(one or no argument)::type_name + ((?:\w+\.|"\w+"\.)?(?:\w+|"\w+")(?:::\w+)?) | \w+\((?:|\g<2>)\)(?:::\w+)? + ) + (?:\s+ASC|\s+DESC)? + (?:\s+NULLS\s+(?:FIRST|LAST))? + ) + (?:\s*,\s*\g<1>)* + \z + /ix + + private_constant :COLUMN_NAME, :COLUMN_NAME_WITH_ORDER + private def lookup_cast_type(sql_type) super(query_value("SELECT #{quote(sql_type)}::regtype::oid", "SCHEMA").to_i) diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb index 84643d20da..d201e40190 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb @@ -5,7 +5,6 @@ module ActiveRecord module PostgreSQL class SchemaDumper < ConnectionAdapters::SchemaDumper # :nodoc: private - def extensions(stream) extensions = @connection.extensions if extensions.any? diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb index 40c5e51d92..628a609521 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb @@ -55,6 +55,7 @@ module ActiveRecord end def drop_table(table_name, options = {}) # :nodoc: + schema_cache.clear_data_source_cache!(table_name.to_s) execute "DROP TABLE#{' IF EXISTS' if options[:if_exists]} #{quote_table_name(table_name)}#{' CASCADE' if options[:force] == :cascade}" end @@ -376,6 +377,8 @@ module ActiveRecord # rename_table('octopuses', 'octopi') def rename_table(table_name, new_name) clear_cache! + schema_cache.clear_data_source_cache!(table_name.to_s) + schema_cache.clear_data_source_cache!(new_name.to_s) execute "ALTER TABLE #{quote_table_name(table_name)} RENAME TO #{quote_table_name(new_name)}" pk, seq = pk_and_sequence_for(new_name) if pk @@ -552,13 +555,13 @@ module ActiveRecord # PostgreSQL requires the ORDER BY columns in the select list for distinct queries, and # requires that the ORDER BY include the distinct column. def columns_for_distinct(columns, orders) #:nodoc: - order_columns = orders.reject(&:blank?).map { |s| + order_columns = orders.compact_blank.map { |s| # Convert Arel node to string s = s.to_sql unless s.is_a?(String) # Remove any ASC/DESC modifiers s.gsub(/\s+(?:ASC|DESC)\b/i, "") .gsub(/\s+NULLS\s+(?:FIRST|LAST)\b/i, "") - }.reject(&:blank?).map.with_index { |column, i| "#{column} AS alias_#{i}" } + }.compact_blank.map.with_index { |column, i| "#{column} AS alias_#{i}" } (order_columns << super).join(", ") end diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/type_metadata.rb b/activerecord/lib/active_record/connection_adapters/postgresql/type_metadata.rb index 8bdec623af..b7f6479357 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/type_metadata.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/type_metadata.rb @@ -7,6 +7,8 @@ module ActiveRecord class TypeMetadata < DelegateClass(SqlTypeMetadata) undef to_yaml if method_defined?(:to_yaml) + include Deduplicable + attr_reader :oid, :fmod def initialize(type_metadata, oid: nil, fmod: nil) @@ -29,6 +31,12 @@ module ActiveRecord oid.hash ^ fmod.hash end + + private + def deduplicated + __setobj__(__getobj__.deduplicate) + super + end end end PostgreSQLTypeMetadata = PostgreSQL::TypeMetadata diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/utils.rb b/activerecord/lib/active_record/connection_adapters/postgresql/utils.rb index f2f4701500..e8caeb8132 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/utils.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/utils.rb @@ -37,7 +37,6 @@ module ActiveRecord end protected - def parts @parts ||= [@schema, @identifier].compact end diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb index 91318a0af1..0a7c6d8ac4 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb @@ -46,7 +46,7 @@ module ActiveRecord conn = PG.connect(conn_params) ConnectionAdapters::PostgreSQLAdapter.new(conn, logger, conn_params, config) rescue ::PG::Error => error - if error.message.include?("does not exist") + if error.message.include?(conn_params[:dbname]) raise ActiveRecord::NoDatabaseError else raise @@ -259,6 +259,12 @@ module ActiveRecord @use_insert_returning = @config.key?(:insert_returning) ? self.class.type_cast_config_to_boolean(@config[:insert_returning]) : true end + def self.database_exists?(config) + !!ActiveRecord::Base.postgresql_connection(config) + rescue ActiveRecord::NoDatabaseError + false + end + # Is this connection alive and ready for queries? def active? @lock.synchronize do @@ -302,6 +308,7 @@ module ActiveRecord end def discard! # :nodoc: + super @connection.socket_io.reopen(IO::NULL) rescue nil @connection = nil end @@ -452,7 +459,6 @@ module ActiveRecord end private - # See https://www.postgresql.org/docs/current/static/errcodes-appendix.html VALUE_LIMIT_VIOLATION = "22001" NUMERIC_VALUE_OUT_OF_RANGE = "22003" diff --git a/activerecord/lib/active_record/connection_adapters/schema_cache.rb b/activerecord/lib/active_record/connection_adapters/schema_cache.rb index dbfe1e4a34..5e30304864 100644 --- a/activerecord/lib/active_record/connection_adapters/schema_cache.rb +++ b/activerecord/lib/active_record/connection_adapters/schema_cache.rb @@ -27,7 +27,6 @@ module ActiveRecord def encode_with(coder) coder["columns"] = @columns - coder["columns_hash"] = @columns_hash coder["primary_keys"] = @primary_keys coder["data_sources"] = @data_sources coder["indexes"] = @indexes @@ -37,16 +36,21 @@ module ActiveRecord def init_with(coder) @columns = coder["columns"] - @columns_hash = coder["columns_hash"] @primary_keys = coder["primary_keys"] @data_sources = coder["data_sources"] @indexes = coder["indexes"] || {} @version = coder["version"] @database_version = coder["database_version"] + + derive_columns_hash_and_deduplicate_values end def primary_keys(table_name) - @primary_keys[table_name] ||= data_source_exists?(table_name) ? connection.primary_key(table_name) : nil + @primary_keys.fetch(table_name) do + if data_source_exists?(table_name) + @primary_keys[deep_deduplicate(table_name)] = deep_deduplicate(connection.primary_key(table_name)) + end + end end # A cached lookup for table existence. @@ -54,7 +58,7 @@ module ActiveRecord prepare_data_sources if @data_sources.empty? return @data_sources[name] if @data_sources.key? name - @data_sources[name] = connection.data_source_exists?(name) + @data_sources[deep_deduplicate(name)] = connection.data_source_exists?(name) end # Add internal cache for table with +table_name+. @@ -73,15 +77,17 @@ module ActiveRecord # Get the columns for a table def columns(table_name) - @columns[table_name] ||= connection.columns(table_name) + @columns.fetch(table_name) do + @columns[deep_deduplicate(table_name)] = deep_deduplicate(connection.columns(table_name)) + end end # Get the columns for a table as a hash, key is the column name # value is the column object. def columns_hash(table_name) - @columns_hash[table_name] ||= Hash[columns(table_name).map { |col| - [col.name, col] - }] + @columns_hash.fetch(table_name) do + @columns_hash[deep_deduplicate(table_name)] = columns(table_name).index_by(&:name) + end end # Checks whether the columns hash is already cached for a table. @@ -90,7 +96,9 @@ module ActiveRecord end def indexes(table_name) - @indexes[table_name] ||= connection.indexes(table_name) + @indexes.fetch(table_name) do + @indexes[deep_deduplicate(table_name)] = deep_deduplicate(connection.indexes(table_name)) + end end def database_version # :nodoc: @@ -124,15 +132,38 @@ module ActiveRecord 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, database_version] + [@version, @columns, {}, @primary_keys, @data_sources, @indexes, database_version] end def marshal_load(array) - @version, @columns, @columns_hash, @primary_keys, @data_sources, @indexes, @database_version = array - @indexes = @indexes || {} + @version, @columns, _columns_hash, @primary_keys, @data_sources, @indexes, @database_version = array + @indexes ||= {} + + derive_columns_hash_and_deduplicate_values end private + def derive_columns_hash_and_deduplicate_values + @columns = deep_deduplicate(@columns) + @columns_hash = @columns.transform_values { |columns| columns.index_by(&:name) } + @primary_keys = deep_deduplicate(@primary_keys) + @data_sources = deep_deduplicate(@data_sources) + @indexes = deep_deduplicate(@indexes) + end + + def deep_deduplicate(value) + case value + when Hash + value.transform_keys { |k| deep_deduplicate(k) }.transform_values { |v| deep_deduplicate(v) } + when Array + value.map { |i| deep_deduplicate(i) } + when String, Deduplicable + -value + else + value + end + end + def prepare_data_sources connection.data_sources.each { |source| @data_sources[source] = true } end diff --git a/activerecord/lib/active_record/connection_adapters/sql_type_metadata.rb b/activerecord/lib/active_record/connection_adapters/sql_type_metadata.rb index df28df7a7c..969867e70f 100644 --- a/activerecord/lib/active_record/connection_adapters/sql_type_metadata.rb +++ b/activerecord/lib/active_record/connection_adapters/sql_type_metadata.rb @@ -1,9 +1,13 @@ # frozen_string_literal: true +require "active_record/connection_adapters/deduplicable" + module ActiveRecord # :stopdoc: module ConnectionAdapters class SqlTypeMetadata + include Deduplicable + attr_reader :sql_type, :type, :limit, :precision, :scale def initialize(sql_type: nil, type: nil, limit: nil, precision: nil, scale: nil) @@ -32,6 +36,12 @@ module ActiveRecord precision.hash >> 1 ^ scale.hash >> 2 end + + private + def deduplicated + @sql_type = -sql_type + super + end end end end diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3/database_statements.rb b/activerecord/lib/active_record/connection_adapters/sqlite3/database_statements.rb index 73b80e8c15..85053acf91 100644 --- a/activerecord/lib/active_record/connection_adapters/sqlite3/database_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/sqlite3/database_statements.rb @@ -11,6 +11,11 @@ module ActiveRecord !READ_QUERY.match?(sql) end + def explain(arel, binds = []) + sql = "EXPLAIN QUERY PLAN #{to_sql(arel, binds)}" + SQLite3::ExplainPrettyPrinter.new.pp(exec_query(sql, "EXPLAIN", [])) + end + def execute(sql, name = nil) #:nodoc: if preventing_writes? && write_query?(sql) raise ActiveRecord::ReadOnlyError, "Write query attempted while in readonly mode: #{sql}" @@ -79,7 +84,6 @@ module ActiveRecord log("rollback transaction", "TRANSACTION") { @connection.rollback } end - private def execute_batch(sql, name = nil) if preventing_writes? && write_query?(sql) diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3/quoting.rb b/activerecord/lib/active_record/connection_adapters/sqlite3/quoting.rb index cb9d32a577..9b74a774e5 100644 --- a/activerecord/lib/active_record/connection_adapters/sqlite3/quoting.rb +++ b/activerecord/lib/active_record/connection_adapters/sqlite3/quoting.rb @@ -13,11 +13,11 @@ module ActiveRecord end def quote_table_name(name) - @quoted_table_names[name] ||= super.gsub(".", "\".\"").freeze + self.class.quoted_table_names[name] ||= super.gsub(".", "\".\"").freeze end def quote_column_name(name) - @quoted_column_names[name] ||= %Q("#{super.gsub('"', '""')}") + self.class.quoted_column_names[name] ||= %Q("#{super.gsub('"', '""')}") end def quoted_time(value) @@ -45,8 +45,43 @@ module ActiveRecord 0 end - private + def column_name_matcher + COLUMN_NAME + end + + def column_name_with_order_matcher + COLUMN_NAME_WITH_ORDER + end + COLUMN_NAME = / + \A + ( + (?: + # "table_name"."column_name" | function(one or no argument) + ((?:\w+\.|"\w+"\.)?(?:\w+|"\w+")) | \w+\((?:|\g<2>)\) + ) + (?:(?:\s+AS)?\s+(?:\w+|"\w+"))? + ) + (?:\s*,\s*\g<1>)* + \z + /ix + + COLUMN_NAME_WITH_ORDER = / + \A + ( + (?: + # "table_name"."column_name" | function(one or no argument) + ((?:\w+\.|"\w+"\.)?(?:\w+|"\w+")) | \w+\((?:|\g<2>)\) + ) + (?:\s+ASC|\s+DESC)? + ) + (?:\s*,\s*\g<1>)* + \z + /ix + + private_constant :COLUMN_NAME, :COLUMN_NAME_WITH_ORDER + + private def _type_cast(value) case value when BigDecimal diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb index 41b35d9fc6..f4847eb6c0 100644 --- a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb @@ -98,6 +98,16 @@ module ActiveRecord configure_connection end + def self.database_exists?(config) + config = config.symbolize_keys + if config[:database] == ":memory:" + return true + else + database_file = defined?(Rails.root) ? File.expand_path(config[:database], Rails.root) : config[:database] + File.exist?(database_file) + end + end + def supports_ddl_transactions? true end @@ -201,14 +211,6 @@ module ActiveRecord end end - #-- - # DATABASE STATEMENTS ====================================== - #++ - def explain(arel, binds = []) - sql = "EXPLAIN QUERY PLAN #{to_sql(arel, binds)}" - SQLite3::ExplainPrettyPrinter.new.pp(exec_query(sql, "EXPLAIN", [])) - end - # SCHEMA STATEMENTS ======================================== def primary_keys(table_name) # :nodoc: @@ -226,6 +228,8 @@ module ActiveRecord # Example: # rename_table('octopuses', 'octopi') def rename_table(table_name, new_name) + schema_cache.clear_data_source_cache!(table_name.to_s) + schema_cache.clear_data_source_cache!(new_name.to_s) exec_query "ALTER TABLE #{quote_table_name(table_name)} RENAME TO #{quote_table_name(new_name)}" rename_table_indexes(table_name, new_name) end @@ -389,6 +393,7 @@ module ActiveRecord if from_primary_key.is_a?(Array) @definition.primary_keys from_primary_key end + columns(from).each do |column| column_name = options[:rename] ? (options[:rename][column.name] || @@ -485,9 +490,9 @@ module ActiveRecord result = exec_query(sql, "SCHEMA").first if result - # Splitting with left parentheses and picking up last will return all + # Splitting with left parentheses and discarding the first part will return all # columns separated with comma(,). - columns_string = result["sql"].split("(").last + columns_string = result["sql"].split("(", 2).last columns_string.split(",").each do |column_string| # This regex will match the column name and collation type and will save diff --git a/activerecord/lib/active_record/connection_adapters/statement_pool.rb b/activerecord/lib/active_record/connection_adapters/statement_pool.rb index 46bd831da7..0960feed84 100644 --- a/activerecord/lib/active_record/connection_adapters/statement_pool.rb +++ b/activerecord/lib/active_record/connection_adapters/statement_pool.rb @@ -48,7 +48,6 @@ module ActiveRecord end private - def cache @cache[Process.pid] end |