mysql database is empty in MariaDB - macos

Question

I installed MariaDB on my Mac Monterey using Homebrew. But I cannot login MariaDB after I dropped root users and other local users even I reinstalled it.
So I looked for solutions on google and luckily enough I can login MariaDB using mysqld_safe --skip-grant-tables --skip-networking from this link enter link description here. I checked the databases and tables to see any abnormalities and I finally find that there is no table in mysql database.
Here's the MariaDB information.
# moonwatcher # MoonWatcherdeMacBook-Air in /usr/local/etc [14:52:33]
$ brew info mariadb
mariadb: stable 10.8.3 (bottled)
Drop-in replacement for MySQL
https://mariadb.org/
Conflicts with:
mariadb-connector-c (because both install `mariadb_config`)
mysql (because mariadb, mysql, and percona install the same binaries)
mytop (because both install `mytop` binaries)
percona-server (because mariadb, mysql, and percona install the same binaries)
/usr/local/Cellar/mariadb/10.8.3_1 (920 files, 187.5MB) *
Poured from bottle on 2022-08-14 at 13:40:39
From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/mariadb.rb
License: GPL-2.0-only
==> Dependencies
Build: bison ✘, cmake ✘, fmt ✘, pkg-config ✔
Required: groonga ✔, openssl#1.1 ✔, pcre2 ✔, zstd ✔
==> Caveats
A "/etc/my.cnf" from another install may interfere with a Homebrew-built
server starting up correctly.
MySQL is configured to only allow connections from localhost by default
To restart mariadb after an upgrade:
brew services restart mariadb
Or, if you don't want/need a background service you can just run:
/usr/local/opt/mariadb/bin/mysqld_safe --datadir=/usr/local/var/mysql
==> Analytics
install: 12,338 (30 days), 43,510 (90 days), 161,252 (365 days)
install-on-request: 12,321 (30 days), 43,452 (90 days), 160,988 (365 days)
build-error: 29 (30 days)
(base)
Associated my.cnf files
# moonwatcher # MoonWatcherdeMacBook-Air in /usr/local/etc [14:53:42]
$ ls
bash_completion.d gitconfig init.d mecabrc my.cnf.d my.cnf.default.default wgetrc
ca-certificates groonga logrotate.d my.cnf my.cnf.default openssl#1.1
(base)
# moonwatcher # MoonWatcherdeMacBook-Air in /usr/local/etc [14:53:43]
$ cat my.cnf
#
# This group is read both by the client and the server
# use it for options that affect everything
#
[client-server]
#
# include *.cnf from the config directory
#
!includedir /usr/local/etc/my.cnf.d
(base)
# moonwatcher # MoonWatcherdeMacBook-Air in /usr/local/etc [14:53:52]
$ cat my.cnf.default
# Default Homebrew MySQL server config
[mysqld]
#skip-grant-tables
# Only allow connections from localhost
bind-address = 127.0.0.1
(base)
# moonwatcher # MoonWatcherdeMacBook-Air in /usr/local/etc [14:53:57]
$ cat my.cnf.default.default
# Default Homebrew MySQL server config
[mysqld]
# Only allow connections from localhost
bind-address = 127.0.0.1
(base)
No tables in mysql database
# moonwatcher # MoonWatcherdeMacBook-Air in ~ [14:54:23]
$ mysql
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 41
Server version: 10.8.3-MariaDB Homebrew
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]>
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| homebrew |
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
5 rows in set (0.002 sec)
MariaDB [(none)]> use mysql;
Database changed
MariaDB [mysql]> show tables;
Empty set (0.001 sec)
MariaDB [mysql]>