Feature request: mariabackup doesn't support Backup & Restore of specific partition of table

mariabackup --backup --user='root' --password='root' --databases='test' --tables='^test.members#P#p4' --target-dir /tmp

180904 20:20:37 Connecting to MySQL server host: localhost, user: root, password: set, port: not set, socket: not set

Using server version 10.2.14-MariaDB-log

mariabackup based on MariaDB server 10.2.14-MariaDB Linux (x86_64)

mariabackup: uses posix_fadvise().

mariabackup: cd to /var/lib/mysql/

mariabackup: open files limit requested 0, set to 1024

mariabackup: using the following InnoDB configuration:

mariabackup:   innodb_data_home_dir = .

mariabackup:   innodb_data_file_path = ibdata1:12M:autoextend

mariabackup:   innodb_log_group_home_dir = ./

2018-09-04 20:20:37 140236241541088 [Note] InnoDB: Number of pools: 1

mariabackup: Generating a list of tablespaces

Skipping db: ./performance_schema

2018-09-04 20:20:37 140236241541088 [Warning] InnoDB: Allocated tablespace ID 28 for test/members#P#p4, old maximum was 0

Skipping db: ./sakila

Skipping db: ./mysql

180904 20:20:37 >> log scanned up to (9047515)

180904 20:20:37 [01] Copying ./ibdata1 to /tmp/ibdata1

180904 20:20:37 [01]        ...done

180904 20:20:37 [01] Copying ./test/members#P#p4.ibd to /tmp/test/members#P#p4.ibd

180904 20:20:37 [01]        ...done

180904 20:20:37 [01] Copying ./test/members#P#p0.ibd to /tmp/test/members#P#p0.ibd

180904 20:20:37 [01]        ...done

180904 20:20:37 [01] Copying ./test/members#P#p1.ibd to /tmp/test/members#P#p1.ibd

180904 20:20:37 [01]        ...done

180904 20:20:37 [01] Copying ./test/members#P#p3.ibd to /tmp/test/members#P#p3.ibd

180904 20:20:37 [01]        ...done

180904 20:20:37 [01] Copying ./test/members#P#p2.ibd to /tmp/test/members#P#p2.ibd

180904 20:20:37 [01]        ...done

180904 20:20:38 >> log scanned up to (9047515)

180904 20:20:38 Executing FLUSH NO_WRITE_TO_BINLOG TABLES...

180904 20:20:38 Executing FLUSH TABLES WITH READ LOCK...

180904 20:20:38 Starting to backup non-InnoDB tables and files

Skipping db: ./performance_schema

180904 20:20:38 [01] Copying ./test/db.opt to /tmp/test/db.opt

180904 20:20:38 [01]        ...done

180904 20:20:38 [01] Copying ./test/members.frm to /tmp/test/members.frm

180904 20:20:38 [01]        ...done

180904 20:20:38 [01] Copying ./test/members.par to /tmp/test/members.par

180904 20:20:38 [01]        ...done

Skipping db: ./sakila

Skipping db: ./mysql

180904 20:20:38 Finished backing up non-InnoDB tables and files

180904 20:20:38 [01] Copying aria_log_control to /tmp/aria_log_control

180904 20:20:38 [01]        ...done

180904 20:20:38 [01] Copying aria_log.00000001 to /tmp/aria_log.00000001

180904 20:20:38 [01]        ...done

180904 20:20:38 [00] Writing xtrabackup_binlog_info

180904 20:20:38 [00]        ...done

180904 20:20:38 Executing FLUSH NO_WRITE_TO_BINLOG ENGINE LOGS...

mariabackup: The latest check point (for incremental): '9047506'

mariabackup: Stopping log copying thread.

180904 20:20:38 >> log scanned up to (9047515)

180904 20:20:38 Executing UNLOCK TABLES

180904 20:20:38 All tables unlocked

180904 20:20:38 [00] Copying ib_buffer_pool to /tmp/ib_buffer_pool

180904 20:20:38 [00]        ...done

180904 20:20:38 Backup created in directory '/tmp/'

MySQL binlog position: filename 'master-bin.000020', position '3506814', GTID of the last change '1-100-99'

180904 20:20:38 [00] Writing backup-my.cnf

180904 20:20:38 [00]        ...done

180904 20:20:38 [00] Writing xtrabackup_info

180904 20:20:38 [00]        ...done

mariabackup: Redo log (from LSN 9047506 to 9047515) was copied.

180904 20:20:38 completed OK!

[root@master-node tmp]# cd test/

[root@master-node test]# ls -ltrh

total 492K

-rw-r----- 1 root root 96K Sep  4 20:39 members#P#p4.ibd

-rw-r----- 1 root root 96K Sep  4 20:39 members#P#p0.ibd

-rw-r----- 1 root root 96K Sep  4 20:39 members#P#p1.ibd

-rw-r----- 1 root root 96K Sep  4 20:39 members#P#p3.ibd

-rw-r----- 1 root root 96K Sep  4 20:39 members#P#p2.ibd

-rw-r----- 1 root root  60 Sep  4 20:39 members.par

-rw-r----- 1 root root 977 Sep  4 20:39 members.frm

-rw-r----- 1 root root  65 Sep  4 20:39 db.opt

Other option tried but fail to go.. 

[root@master-node tmp]# mariabackup --backup --user='root' --password='root' --databases='test' --tables-file='/var/lib/mysql/test/members#P#p4.ibd' --target-dir /tmp

180904 20:43:45 Connecting to MySQL server host: localhost, user: root, password: set, port: not set, socket: not set

Using server version 10.2.14-MariaDB-log

mariabackup based on MariaDB server 10.2.14-MariaDB Linux (x86_64)

mariabackup: uses posix_fadvise().

mariabackup: cd to /var/lib/mysql/

mariabackup: open files limit requested 0, set to 1024

mariabackup: using the following InnoDB configuration:

mariabackup:   innodb_data_home_dir = .

mariabackup:   innodb_data_file_path = ibdata1:12M:autoextend

mariabackup:   innodb_log_group_home_dir = ./

2018-09-04 20:43:45 140461935507424 [Note] InnoDB: Number of pools: 1

mariabackup: `▒▒D...` name is too long

[root@master-node tmp]# mariabackup --backup --user='root' --password='root'  --tables-file='/var/lib/mysql/test/members#P#p4.ibd' --target-dir /tmp

180904 20:44:01 Connecting to MySQL server host: localhost, user: root, password: set, port: not set, socket: not set

Using server version 10.2.14-MariaDB-log

mariabackup based on MariaDB server 10.2.14-MariaDB Linux (x86_64)

mariabackup: uses posix_fadvise().

mariabackup: cd to /var/lib/mysql/

mariabackup: open files limit requested 0, set to 1024

mariabackup: using the following InnoDB configuration:

mariabackup:   innodb_data_home_dir = .

mariabackup:   innodb_data_file_path = ibdata1:12M:autoextend

mariabackup:   innodb_log_group_home_dir = ./

2018-09-04 20:44:01 140566690641888 [Note] InnoDB: Number of pools: 1

mariabackup: `▒▒D...` name is too long