ActiveRecord::ConnectionAdapters::Mysql2Adapter < ActiveRecord::ConnectionAdapters::AbstractMysqlAdapter

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 64
      def self.database_exists?(config)
        !!ActiveRecord::Base.mysql2_connection(config)
      rescue ActiveRecord::NoDatabaseError
        false
      end

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 58
      def initialize(connection, logger, connection_options, config)
        superclass_config = config.reverse_merge(prepared_statements: false)
        super(connection, logger, connection_options, superclass_config)
        configure_connection
      end

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 43
        def new_client(config)
          Mysql2::Client.new(config)
        rescue Mysql2::Error => error
          if error.error_number == ConnectionAdapters::Mysql2Adapter::ER_BAD_DB_ERROR
            raise ActiveRecord::NoDatabaseError.db_error(config[:database])
          elsif error.error_number == ConnectionAdapters::Mysql2Adapter::ER_ACCESS_DENIED_ERROR
            raise ActiveRecord::DatabaseConnectionError.username_error(config[:username])
          elsif [ConnectionAdapters::Mysql2Adapter::ER_CONN_HOST_ERROR, ConnectionAdapters::Mysql2Adapter::ER_UNKNOWN_HOST_ERROR].include?(error.error_number)
            raise ActiveRecord::DatabaseConnectionError.hostname_error(config[:host])
          else
            raise ActiveRecord::ConnectionNotEstablished, error.message
          end
        end

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 118
      def active?
        @connection.ping
      end

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 131
      def disconnect!
        super
        @connection.close
      end

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 100
      def error_number(exception)
        exception.error_number if exception.respond_to?(:error_number)
      end

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 108
      def quote_string(string)
        @connection.escape(string)
      rescue Mysql2::Error => error
        raise translate_exception(error, message: error.message, sql: "<escape>", binds: [])
      end

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 122
      def reconnect!
        super
        disconnect!
        connect
      end

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 74
      def supports_comments?
        true
      end

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 78
      def supports_comments_in_create?
        true
      end

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 70
      def supports_json?
        !mariadb? && database_version >= "5.7.8"
      end

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 86
      def supports_lazy_transactions?
        true
      end

# File activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb, line 82
      def supports_savepoints?
        true
      end