/* 参数说明： pi_program_name    程序名称 pi_directory        写入日志文件所在的目录 pi_file            日志文件名称，必须存在 pi_log_level        日记级别，INFO、WARN、FATAL pi_write_to        写到哪里，SCREEN、FILE、TABLE、ALL pi_error_message   写入到日志的错误信息   pi_status            输出参数 1失败 0成功*/BEGIN    pls_logger  ( pi_program_name   => 'SCREEN_PROGRAM_ERROR'                , pi_log_level      => 'INFO'                , pi_write_to       => 'SCREEN'                , pi_error_message  => 'This execution writes to SCREEN.'                );    pls_logger  ( pi_program_name   => 'WARN_PROGRAM_ERROR'                , pi_log_level      => 'WARN'                , pi_write_to       => 'TABLE'                , pi_error_message  => 'This execution writes to TABLE.'                );                    pls_logger  ( pi_program_name     => 'FATAL_PROGRAM_ERROR'                , pi_log_level        => 'FATAL'                , pi_write_to         => 'FILE'                , pi_error_message    => 'This execution writes to FILE.'                , pi_file             => 'my_logfile.txt'                );                    pls_logger  ( pi_program_name   => 'FATAL_PROGRAM_ERROR'                , pi_log_level      => 'FATAL'                , pi_write_to       => 'ALL'                , pi_error_message  => 'This execution writes to ALL.'                , pi_file           => 'my_logfile.txt'                );END;/