class method self.new

# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 214
      def initialize(connection, logger, connection_parameters, config)
        super(connection, logger, config)

        @connection_parameters = connection_parameters

        # @local_tz is initialized as nil to avoid warnings when connect tries to use it
        @local_tz = nil
        @max_identifier_length = nil

        connect
        add_pg_encoders
        @statements = StatementPool.new @connection,
                                        self.class.type_cast_config_to_integer(config[:statement_limit])

        if postgresql_version < 90100
          raise "Your version of PostgreSQL (#{postgresql_version}) is too old. Active Record supports PostgreSQL >= 9.1."
        end

        add_pg_decoders

        @type_map = Type::HashLookupTypeMap.new
        initialize_type_map
        @local_tz = execute("SHOW TIME ZONE", "SCHEMA").first["TimeZone"]
        @use_insert_returning = @config.key?(:insert_returning) ? self.class.type_cast_config_to_boolean(@config[:insert_returning]) : true
      end