diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb')
| -rw-r--r-- | activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb | 632 |
1 files changed, 307 insertions, 325 deletions
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 c3206c6045..3e84786be0 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb @@ -1,235 +1,33 @@ +require 'active_record/connection_adapters/abstract_adapter' +require 'active_record/connection_adapters/mysql/column' +require 'active_record/connection_adapters/mysql/schema_creation' +require 'active_record/connection_adapters/mysql/schema_definitions' +require 'active_record/connection_adapters/mysql/schema_dumper' +require 'active_record/connection_adapters/mysql/type_metadata' + require 'active_support/core_ext/string/strip' module ActiveRecord module ConnectionAdapters class AbstractMysqlAdapter < AbstractAdapter + include MySQL::ColumnDumper include Savepoints - module ColumnMethods - def primary_key(name, type = :primary_key, **options) - options[:auto_increment] = true if type == :bigint - super - end - end - - class ColumnDefinition < ActiveRecord::ConnectionAdapters::ColumnDefinition - attr_accessor :charset - end - - class TableDefinition < ActiveRecord::ConnectionAdapters::TableDefinition - include ColumnMethods - - def new_column_definition(name, type, options) # :nodoc: - column = super - case column.type - when :primary_key - column.type = :integer - column.auto_increment = true - end - column.charset = options[:charset] - column - end - - private - - def create_column_definition(name, type) - ColumnDefinition.new(name, type) - end - end - - class Table < ActiveRecord::ConnectionAdapters::Table - include ColumnMethods - end - - class SchemaCreation < AbstractAdapter::SchemaCreation - private - - def visit_DropForeignKey(name) - "DROP FOREIGN KEY #{name}" - end - - def visit_TableDefinition(o) - name = o.name - create_sql = "CREATE#{' TEMPORARY' if o.temporary} TABLE #{quote_table_name(name)} " - - statements = o.columns.map { |c| accept c } - statements.concat(o.indexes.map { |column_name, options| index_in_create(name, column_name, options) }) - - create_sql << "(#{statements.join(', ')}) " if statements.present? - create_sql << "#{o.options}" - create_sql << " AS #{@conn.to_sql(o.as)}" if o.as - create_sql - end - - def visit_AddColumnDefinition(o) - add_column_position!(super, column_options(o.column)) - end - - def visit_ChangeColumnDefinition(o) - change_column_sql = "CHANGE #{quote_column_name(o.name)} #{accept(o.column)}" - add_column_position!(change_column_sql, column_options(o.column)) - end - - def column_options(o) - column_options = super - column_options[:charset] = o.charset - column_options - end - - def add_column_options!(sql, options) - if options[:charset] - sql << " CHARACTER SET #{options[:charset]}" - end - if options[:collation] - sql << " COLLATE #{options[:collation]}" - end - super - end - - def add_column_position!(sql, options) - if options[:first] - sql << " FIRST" - elsif options[:after] - sql << " AFTER #{quote_column_name(options[:after])}" - end - sql - end - - def index_in_create(table_name, column_name, options) - index_name, index_type, index_columns, _, _, index_using = @conn.add_index_options(table_name, column_name, options) - "#{index_type} INDEX #{quote_column_name(index_name)} #{index_using} (#{index_columns}) " - end - end - def update_table_definition(table_name, base) # :nodoc: - Table.new(table_name, base) + MySQL::Table.new(table_name, base) end def schema_creation - SchemaCreation.new self - end - - def column_spec_for_primary_key(column) - spec = {} - if column.auto_increment? - spec[:id] = ':bigint' if column.bigint? - return if spec.empty? - else - spec[:id] = column.type.inspect - spec.merge!(prepare_column_options(column).delete_if { |key, _| [:name, :type, :null].include?(key) }) - end - spec - end - - private - - def schema_limit(column) - super unless column.type == :boolean - end - - def schema_precision(column) - super unless /time/ === column.sql_type && column.precision == 0 - end - - def schema_collation(column) - if column.collation && table_name = column.instance_variable_get(:@table_name) - @collation_cache ||= {} - @collation_cache[table_name] ||= select_one("SHOW TABLE STATUS LIKE '#{table_name}'")["Collation"] - column.collation.inspect if column.collation != @collation_cache[table_name] - end - end - - public - - class Column < ConnectionAdapters::Column # :nodoc: - delegate :strict, :extra, to: :sql_type_metadata, allow_nil: true - - def initialize(*) - super - assert_valid_default(default) - extract_default - end - - def extract_default - if blob_or_text_column? - @default = null || strict ? nil : '' - elsif missing_default_forged_as_empty_string?(default) - @default = nil - end - end - - def has_default? - return false if blob_or_text_column? # MySQL forbids defaults on blob and text columns - super - end - - def blob_or_text_column? - sql_type =~ /blob/i || type == :text - end - - def case_sensitive? - collation && !collation.match(/_ci$/) - end - - def auto_increment? - extra == 'auto_increment' - end - - private - - # MySQL misreports NOT NULL column default when none is given. - # We can't detect this for columns which may have a legitimate '' - # default (string) but we can for others (integer, datetime, boolean, - # and the rest). - # - # Test whether the column has default '', is not null, and is not - # a type allowing default ''. - def missing_default_forged_as_empty_string?(default) - type != :string && !null && default == '' - end - - def assert_valid_default(default) - if blob_or_text_column? && default.present? - raise ArgumentError, "#{type} columns cannot have a default value: #{default.inspect}" - end - end - end - - class MysqlTypeMetadata < DelegateClass(SqlTypeMetadata) # :nodoc: - attr_reader :extra, :strict - - def initialize(type_metadata, extra: "", strict: false) - super(type_metadata) - @type_metadata = type_metadata - @extra = extra - @strict = strict - end - - def ==(other) - other.is_a?(MysqlTypeMetadata) && - attributes_for_hash == other.attributes_for_hash - end - alias eql? == - - def hash - attributes_for_hash.hash - end - - protected - - def attributes_for_hash - [self.class, @type_metadata, extra, strict] - end + MySQL::SchemaCreation.new(self) end ## # :singleton-method: - # By default, the MysqlAdapter will consider all columns of type <tt>tinyint(1)</tt> - # as boolean. If you wish to disable this emulation (which was the default - # behavior in versions 0.13.1 and earlier) you can add the following line + # By default, the Mysql2Adapter will consider all columns of type <tt>tinyint(1)</tt> + # as boolean. If you wish to disable this emulation you can add the following line # to your application.rb file: # - # ActiveRecord::ConnectionAdapters::Mysql[2]Adapter.emulate_booleans = false + # ActiveRecord::ConnectionAdapters::Mysql2Adapter.emulate_booleans = false class_attribute :emulate_booleans self.emulate_booleans = true @@ -242,17 +40,18 @@ module ActiveRecord QUOTED_TRUE, QUOTED_FALSE = '1', '0' NATIVE_DATABASE_TYPES = { - :primary_key => "int(11) auto_increment PRIMARY KEY", - :string => { :name => "varchar", :limit => 255 }, - :text => { :name => "text" }, - :integer => { :name => "int", :limit => 4 }, - :float => { :name => "float" }, - :decimal => { :name => "decimal" }, - :datetime => { :name => "datetime" }, - :time => { :name => "time" }, - :date => { :name => "date" }, - :binary => { :name => "blob" }, - :boolean => { :name => "tinyint", :limit => 1 } + primary_key: "int auto_increment PRIMARY KEY", + string: { name: "varchar", limit: 255 }, + text: { name: "text" }, + integer: { name: "int", limit: 4 }, + float: { name: "float" }, + decimal: { name: "decimal" }, + datetime: { name: "datetime" }, + time: { name: "time" }, + date: { name: "date" }, + binary: { name: "blob" }, + boolean: { name: "tinyint", limit: 1 }, + json: { name: "json" }, } INDEX_TYPES = [:fulltext, :spatial] @@ -260,14 +59,14 @@ module ActiveRecord # FIXME: Make the first parameter more similar for the two adapters def initialize(connection, logger, connection_options, config) - super(connection, logger) - @connection_options, @config = connection_options, config + super(connection, logger, config) @quoted_column_names, @quoted_table_names = {}, {} @visitor = Arel::Visitors::MySQL.new self if self.class.type_cast_config_to_boolean(config.fetch(:prepared_statements) { true }) @prepared_statements = true + @visitor.extend(DetermineIfPreparableVisitor) else @prepared_statements = false end @@ -283,6 +82,10 @@ module ActiveRecord end end + def version + @version ||= Version.new(full_version.match(/^\d+\.\d+\.\d+/)[0]) + end + # Returns true, since this connection adapter supports migrations. def supports_migrations? true @@ -307,7 +110,11 @@ module ActiveRecord # # http://bugs.mysql.com/bug.php?id=39170 def supports_transaction_isolation? - version[0] >= 5 + version >= '5.0.0' + end + + def supports_explain? + true end def supports_indexes_in_create? @@ -319,11 +126,25 @@ module ActiveRecord end def supports_views? - version[0] >= 5 + version >= '5.0.0' end def supports_datetime_with_precision? - (version[0] == 5 && version[1] >= 6) || version[0] >= 6 + version >= '5.6.4' + end + + # 5.0.0 definitely supports it, possibly supported by earlier versions but + # not sure + def supports_advisory_locks? + version >= '5.0.0' + end + + def get_advisory_lock(lock_name, timeout = 0) # :nodoc: + select_value("SELECT GET_LOCK('#{lock_name}', #{timeout});").to_s == '1' + end + + def release_advisory_lock(lock_name) # :nodoc: + select_value("SELECT RELEASE_LOCK('#{lock_name}')").to_s == '1' end def native_database_types @@ -343,7 +164,7 @@ module ActiveRecord end def new_column(field, default, sql_type_metadata = nil, null = true, default_function = nil, collation = nil) # :nodoc: - Column.new(field, default, sql_type_metadata, null, default_function, collation) + MySQL::Column.new(field, default, sql_type_metadata, null, default_function, collation) end # Must return the MySQL error number from the exception, if the exception has an @@ -386,6 +207,14 @@ module ActiveRecord 0 end + def quoted_date(value) + if supports_datetime_with_precision? + super + else + super.sub(/\.\d{6}\z/, '') + end + end + # REFERENTIAL INTEGRITY ==================================== def disable_referential_integrity #:nodoc: @@ -403,6 +232,80 @@ module ActiveRecord # DATABASE STATEMENTS ====================================== #++ + def explain(arel, binds = []) + sql = "EXPLAIN #{to_sql(arel, binds)}" + start = Time.now + result = exec_query(sql, 'EXPLAIN', binds) + elapsed = Time.now - start + + ExplainPrettyPrinter.new.pp(result, elapsed) + end + + class ExplainPrettyPrinter # :nodoc: + # Pretty prints the result of an EXPLAIN in a way that resembles the output of the + # MySQL shell: + # + # +----+-------------+-------+-------+---------------+---------+---------+-------+------+-------------+ + # | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | + # +----+-------------+-------+-------+---------------+---------+---------+-------+------+-------------+ + # | 1 | SIMPLE | users | const | PRIMARY | PRIMARY | 4 | const | 1 | | + # | 1 | SIMPLE | posts | ALL | NULL | NULL | NULL | NULL | 1 | Using where | + # +----+-------------+-------+-------+---------------+---------+---------+-------+------+-------------+ + # 2 rows in set (0.00 sec) + # + # This is an exercise in Ruby hyperrealism :). + def pp(result, elapsed) + widths = compute_column_widths(result) + separator = build_separator(widths) + + pp = [] + + pp << separator + pp << build_cells(result.columns, widths) + pp << separator + + result.rows.each do |row| + pp << build_cells(row, widths) + end + + pp << separator + pp << build_footer(result.rows.length, elapsed) + + pp.join("\n") + "\n" + end + + private + + def compute_column_widths(result) + [].tap do |widths| + result.columns.each_with_index do |column, i| + cells_in_column = [column] + result.rows.map {|r| r[i].nil? ? 'NULL' : r[i].to_s} + widths << cells_in_column.map(&:length).max + end + end + end + + def build_separator(widths) + padding = 1 + '+' + widths.map {|w| '-' * (w + (padding*2))}.join('+') + '+' + end + + def build_cells(items, widths) + cells = [] + items.each_with_index do |item, i| + item = 'NULL' if item.nil? + justifier = item.is_a?(Numeric) ? 'rjust' : 'ljust' + cells << item.to_s.send(justifier, widths[i]) + end + '| ' + cells.join(' | ') + ' |' + end + + def build_footer(nrows, elapsed) + rows_label = nrows == 1 ? 'row' : 'rows' + "#{nrows} #{rows_label} in set (%.2f sec)" % elapsed + end + end + def clear_cache! super reload_type_map @@ -413,18 +316,13 @@ module ActiveRecord log(sql, name) { @connection.query(sql) } end - # MysqlAdapter has to free a result after using it, so we use this method to write - # stuff in an abstract way without concerning ourselves about whether it needs to be - # explicitly freed or not. - def execute_and_free(sql, name = nil) #:nodoc: + # Mysql2Adapter doesn't have to free a result after using it, but we use this method + # to write stuff in an abstract way without concerning ourselves about whether it + # needs to be explicitly freed or not. + def execute_and_free(sql, name = nil) # :nodoc: yield execute(sql, name) end - def update_sql(sql, name = nil) #:nodoc: - super - @connection.affected_rows - end - def begin_db_transaction execute "BEGIN" end @@ -445,7 +343,7 @@ module ActiveRecord # In the simple case, MySQL allows us to place JOINs directly into the UPDATE # query. However, this does not allow for LIMIT, OFFSET and ORDER. To support # these, we must use a subquery. - def join_to_update(update, select) #:nodoc: + def join_to_update(update, select, key) # :nodoc: if select.limit || select.offset || select.orders.any? super else @@ -506,33 +404,70 @@ module ActiveRecord show_variable 'collation_database' end - def tables(name = nil, database = nil, like = nil) #:nodoc: - sql = "SHOW TABLES " - sql << "IN #{quote_table_name(database)} " if database - sql << "LIKE #{quote(like)}" if like + def tables(name = nil) # :nodoc: + ActiveSupport::Deprecation.warn(<<-MSG.squish) + #tables currently returns both tables and views. + This behavior is deprecated and will be changed with Rails 5.1 to only return tables. + Use #data_sources instead. + MSG - execute_and_free(sql, 'SCHEMA') do |result| - result.collect(&:first) + if name + ActiveSupport::Deprecation.warn(<<-MSG.squish) + Passing arguments to #tables is deprecated without replacement. + MSG end + + data_sources + end + + def data_sources + sql = "SELECT table_name FROM information_schema.tables " + sql << "WHERE table_schema = #{quote(@config[:database])}" + + select_values(sql, 'SCHEMA') end def truncate(table_name, name = nil) execute "TRUNCATE TABLE #{quote_table_name(table_name)}", name end - def table_exists?(name) - return false unless name.present? - return true if tables(nil, nil, name).any? + def table_exists?(table_name) + # Update lib/active_record/internal_metadata.rb when this gets removed + ActiveSupport::Deprecation.warn(<<-MSG.squish) + #table_exists? currently checks both tables and views. + This behavior is deprecated and will be changed with Rails 5.1 to only check tables. + Use #data_source_exists? instead. + MSG - name = name.to_s - schema, table = name.split('.', 2) + data_source_exists?(table_name) + end - unless table # A table was provided without a schema - table = schema - schema = nil - end + def data_source_exists?(table_name) + return false unless table_name.present? - tables(nil, schema, table).any? + schema, name = table_name.to_s.split('.', 2) + schema, name = @config[:database], schema unless name # A table was provided without a schema + + sql = "SELECT table_name FROM information_schema.tables " + sql << "WHERE table_schema = #{quote(schema)} AND table_name = #{quote(name)}" + + select_values(sql, 'SCHEMA').any? + end + + def views # :nodoc: + select_values("SHOW FULL TABLES WHERE table_type = 'VIEW'", 'SCHEMA') + end + + def view_exists?(view_name) # :nodoc: + return false unless view_name.present? + + schema, name = view_name.to_s.split('.', 2) + schema, name = @config[:database], schema unless name # A view was provided without a schema + + sql = "SELECT table_name FROM information_schema.tables WHERE table_type = 'VIEW'" + sql << " AND table_schema = #{quote(schema)} AND table_name = #{quote(name)}" + + select_values(sql, 'SCHEMA').any? end # Returns an array of indexes for the given table. @@ -560,14 +495,16 @@ module ActiveRecord end # Returns an array of +Column+ objects for the table specified by +table_name+. - def columns(table_name)#:nodoc: + def columns(table_name) # :nodoc: sql = "SHOW FULL FIELDS FROM #{quote_table_name(table_name)}" execute_and_free(sql, 'SCHEMA') do |result| each_hash(result).map do |field| - field_name = set_field_encoding(field[:Field]) - sql_type = field[:Type] - type_metadata = fetch_type_metadata(sql_type, field[:Extra]) - new_column(field_name, field[:Default], type_metadata, field[:Null] == "YES", nil, field[:Collation]) + type_metadata = fetch_type_metadata(field[:Type], field[:Extra]) + if type_metadata.type == :datetime && field[:Default] == "CURRENT_TIMESTAMP" + new_column(field[:Field], nil, type_metadata, field[:Null] == "YES", field[:Default], field[:Collation]) + else + new_column(field[:Field], field[:Default], type_metadata, field[:Null] == "YES", nil, field[:Collation]) + end end end end @@ -616,6 +553,7 @@ 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 = {}) + create_table_info_cache.delete(table_name) if create_table_info_cache.key?(table_name) execute "DROP#{' TEMPORARY' if options[:temporary]} TABLE#{' IF EXISTS' if options[:if_exists]} #{quote_table_name(table_name)}#{' CASCADE' if options[:force] == :cascade}" end @@ -629,7 +567,8 @@ module ActiveRecord end end - def change_column_default(table_name, column_name, default) #:nodoc: + def change_column_default(table_name, column_name, default_or_changes) #:nodoc: + default = extract_new_default_value(default_or_changes) column = column_for(table_name, column_name) change_column table_name, column_name, column.sql_type, :default => default end @@ -670,7 +609,7 @@ module ActiveRecord AND fk.table_name = '#{table_name}' SQL - create_table_info = select_one("SHOW CREATE TABLE #{quote_table_name(table_name)}")["Create Table"] + create_table_info = create_table_info(table_name) fk_info.map do |row| options = { @@ -687,7 +626,7 @@ module ActiveRecord end def table_options(table_name) - create_table_info = select_one("SHOW CREATE TABLE #{quote_table_name(table_name)}")["Create Table"] + create_table_info = create_table_info(table_name) # strip create_definitions and partition_options raw_table_options = create_table_info.sub(/\A.*\n\) /m, '').sub(/\n\/\*!.*\*\/\n\z/m, '').strip @@ -697,54 +636,57 @@ module ActiveRecord end # Maps logical Rails types to MySQL-specific data types. - def type_to_sql(type, limit = nil, precision = nil, scale = nil) - case type.to_s - when 'binary' - binary_to_sql(limit) + def type_to_sql(type, limit = nil, precision = nil, scale = nil, unsigned = nil) + sql = case type.to_s when 'integer' integer_to_sql(limit) when 'text' text_to_sql(limit) + when 'blob' + binary_to_sql(limit) + when 'binary' + if (0..0xfff) === limit + "varbinary(#{limit})" + else + binary_to_sql(limit) + end else - super + super(type, limit, precision, scale) end + + sql << ' unsigned' if unsigned && type != :primary_key + sql end # SHOW VARIABLES LIKE 'name' def show_variable(name) - variables = select_all("SHOW VARIABLES LIKE '#{name}'", 'SCHEMA') + variables = select_all("select @@#{name} as 'Value'", 'SCHEMA') variables.first['Value'] unless variables.empty? + rescue ActiveRecord::StatementInvalid + nil end - # Returns a table's primary key and belonging sequence. - def pk_and_sequence_for(table) - execute_and_free("SHOW CREATE TABLE #{quote_table_name(table)}", 'SCHEMA') do |result| - create_table = each_hash(result).first[:"Create Table"] - if create_table.to_s =~ /PRIMARY KEY\s+(?:USING\s+\w+\s+)?\((.+)\)/ - keys = $1.split(",").map { |key| key.delete('`"') } - keys.length == 1 ? [keys.first, nil] : nil - else - nil - end - end - end + def primary_keys(table_name) # :nodoc: + raise ArgumentError unless table_name.present? - # Returns just a table's primary key - def primary_key(table) - pk_and_sequence = pk_and_sequence_for(table) - pk_and_sequence && pk_and_sequence.first - end + schema, name = table_name.to_s.split('.', 2) + schema, name = @config[:database], schema unless name # A table was provided without a schema - def case_sensitive_modifier(node, table_attribute) - node = Arel::Nodes.build_quoted node, table_attribute - Arel::Nodes::Bin.new(node) + select_values(<<-SQL.strip_heredoc, 'SCHEMA') + SELECT column_name + FROM information_schema.key_column_usage + WHERE constraint_name = 'PRIMARY' + AND table_schema = #{quote(schema)} + AND table_name = #{quote(name)} + ORDER BY ordinal_position + SQL end def case_sensitive_comparison(table, attribute, column, value) - if column.case_sensitive? - table[attribute].eq(value) - else + if value.nil? || column.case_sensitive? super + else + table[attribute].eq(Arel::Nodes::Bin.new(Arel::Nodes::BindParam.new)) end end @@ -752,10 +694,25 @@ module ActiveRecord if column.case_sensitive? super else - table[attribute].eq(value) + table[attribute].eq(Arel::Nodes::BindParam.new) end end + # In MySQL 5.7.5 and up, ONLY_FULL_GROUP_BY affects handling of queries that use + # DISTINCT and ORDER BY. It requires the ORDER BY columns in the select list for + # 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| + # 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}" } + + [super, *order_columns].join(', ') + end + def strict_mode? self.class.type_cast_config_to_boolean(@config.fetch(:strict, true)) end @@ -781,6 +738,7 @@ module ActiveRecord m.register_type %r(longblob)i, Type::Binary.new(limit: 2**32 - 1) m.register_type %r(^float)i, Type::Float.new(limit: 24) m.register_type %r(^double)i, Type::Float.new(limit: 53) + m.register_type %r(^json)i, MysqlJson.new register_integer_type m, %r(^bigint)i, limit: 8 register_integer_type m, %r(^int)i, limit: 4 @@ -789,7 +747,6 @@ module ActiveRecord register_integer_type m, %r(^tinyint)i, limit: 1 m.alias_type %r(tinyint\(1\))i, 'boolean' if emulate_booleans - m.alias_type %r(set)i, 'varchar' m.alias_type %r(year)i, 'integer' m.alias_type %r(bit)i, 'binary' @@ -798,11 +755,17 @@ module ActiveRecord .split(',').map{|enum| enum.strip.length - 2}.max MysqlString.new(limit: limit) end + + m.register_type(%r(^set)i) do |sql_type| + limit = sql_type[/^set\((.+)\)/i, 1] + .split(',').map{|set| set.strip.length - 1}.sum - 1 + MysqlString.new(limit: limit) + end end def register_integer_type(mapping, key, options) # :nodoc: mapping.register_type(key) do |sql_type| - if /unsigned/i =~ sql_type + if /\bunsigned\z/ === sql_type Type::UnsignedInteger.new(options) else Type::Integer.new(options) @@ -819,7 +782,7 @@ module ActiveRecord end def fetch_type_metadata(sql_type, extra = "") - MysqlTypeMetadata.new(super(sql_type), extra: extra, strict: strict_mode?) + MySQL::TypeMetadata.new(super(sql_type), extra: extra, strict: strict_mode?) end def add_index_length(option_strings, column_names, options = {}) @@ -850,9 +813,9 @@ module ActiveRecord def translate_exception(exception, message) case error_number(exception) when 1062 - RecordNotUnique.new(message, exception) + RecordNotUnique.new(message) when 1452 - InvalidForeignKey.new(message, exception) + InvalidForeignKey.new(message) else super end @@ -929,15 +892,13 @@ module ActiveRecord subsubselect = select.clone subsubselect.projections = [key] - subselect = Arel::SelectManager.new(select.engine) - subselect.project Arel.sql(key.name) - # Materialized subquery by adding distinct + # Materialize subquery by adding distinct # to work with MySQL 5.7.6 which sets optimizer_switch='derived_merge=on' - subselect.from subsubselect.distinct.as('__active_record_temp') - end + subsubselect.distinct unless select.limit || select.offset || select.orders.any? - def version - @version ||= full_version.scan(/^(\d+)\.(\d+)\.(\d+)/).flatten.map(&:to_i) + subselect = Arel::SelectManager.new(select.engine) + subselect.project Arel.sql(key.name) + subselect.from subsubselect.as('__active_record_temp') end def mariadb? @@ -945,7 +906,7 @@ module ActiveRecord end def supports_rename_index? - mariadb? ? false : (version[0] == 5 && version[1] >= 7) || version[0] >= 6 + mariadb? ? false : version >= '5.7.6' end def configure_connection @@ -959,15 +920,17 @@ module ActiveRecord wait_timeout = 2147483 unless wait_timeout.is_a?(Fixnum) variables['wait_timeout'] = self.class.type_cast_config_to_integer(wait_timeout) + defaults = [':default', :default].to_set + # Make MySQL reject illegal values rather than truncating or blanking them, see - # http://dev.mysql.com/doc/refman/5.6/en/sql-mode.html#sqlmode_strict_all_tables + # http://dev.mysql.com/doc/refman/5.7/en/sql-mode.html#sqlmode_strict_all_tables # If the user has provided another value for sql_mode, don't replace it. - unless variables.has_key?('sql_mode') + unless variables.has_key?('sql_mode') || defaults.include?(@config[:strict]) variables['sql_mode'] = strict_mode? ? 'STRICT_ALL_TABLES' : '' end # NAMES does not have an equals sign, see - # http://dev.mysql.com/doc/refman/5.6/en/set-statement.html#id944430 + # http://dev.mysql.com/doc/refman/5.7/en/set-statement.html#id944430 # (trailing comma because variable_assignments will always have content) if @config[:encoding] encoding = "NAMES #{@config[:encoding]}" @@ -977,7 +940,7 @@ module ActiveRecord # Gather up all of the SET variables... variable_assignments = variables.map do |k, v| - if v == ':default' || v == :default + if defaults.include?(v) "@@SESSION.#{k} = DEFAULT" # Sets the value to the global or compile default elsif !v.nil? "@@SESSION.#{k} = #{quote(v)}" @@ -998,17 +961,16 @@ module ActiveRecord end end - def create_table_definition(name, temporary = false, options = nil, as = nil) # :nodoc: - TableDefinition.new(native_database_types, name, temporary, options, as) + def create_table_info_cache # :nodoc: + @create_table_info_cache ||= {} end - def binary_to_sql(limit) # :nodoc: - case limit - when 0..0xfff; "varbinary(#{limit})" - when nil; "blob" - when 0x1000..0xffffffff; "blob(#{limit})" - else raise(ActiveRecordError, "No binary type has character length #{limit}") - end + def create_table_info(table_name) # :nodoc: + create_table_info_cache[table_name] ||= select_one("SHOW CREATE TABLE #{quote_table_name(table_name)}")["Create Table"] + end + + def create_table_definition(name, temporary = false, options = nil, as = nil) # :nodoc: + MySQL::TableDefinition.new(name, temporary, options, as) end def integer_to_sql(limit) # :nodoc: @@ -1016,8 +978,9 @@ module ActiveRecord when 1; 'tinyint' when 2; 'smallint' when 3; 'mediumint' - when nil, 4, 11; 'int(11)' # compatibility with MySQL default + when nil, 4; 'int' when 5..8; 'bigint' + when 11; 'int(11)' # backward compatibility with Rails 2.0 else raise(ActiveRecordError, "No integer type has byte size #{limit}") end end @@ -1028,7 +991,25 @@ module ActiveRecord when nil, 0x100..0xffff; 'text' when 0x10000..0xffffff; 'mediumtext' when 0x1000000..0xffffffff; 'longtext' - else raise(ActiveRecordError, "No text type has character length #{limit}") + else raise(ActiveRecordError, "No text type has byte length #{limit}") + end + end + + def binary_to_sql(limit) # :nodoc: + case limit + when 0..0xff; 'tinyblob' + when nil, 0x100..0xffff; 'blob' + when 0x10000..0xffffff; 'mediumblob' + when 0x1000000..0xffffffff; 'longblob' + else raise(ActiveRecordError, "No binary type has byte length #{limit}") + end + end + + class MysqlJson < Type::Internal::AbstractJson # :nodoc: + def changed_in_place?(raw_old_value, new_value) + # Normalization is required because MySQL JSON data format includes + # the space between the elements. + super(serialize(deserialize(raw_old_value)), new_value) end end @@ -1052,8 +1033,9 @@ module ActiveRecord end end - ActiveRecord::Type.register(:string, MysqlString, adapter: :mysql) + ActiveRecord::Type.register(:json, MysqlJson, adapter: :mysql2) ActiveRecord::Type.register(:string, MysqlString, adapter: :mysql2) + ActiveRecord::Type.register(:unsigned_integer, Type::UnsignedInteger, adapter: :mysql2) end end end |