Use DBCAT to migrate schemas from OceanBase Database to a MySQL database

$sudo yum -y install java-1.8.0-openjdk.x86_64

$which java
/usr/local/java/jdk1.8.0_261/bin/java

echo 'export JAVA_HOME=/usr/local/java/jdk1.8.0_261/' >> ~/.bash_profile
. ~/.bash_profile

tar zxvf dbcat-1.8.0-SNAPSHOT.tar.gz
cd dbcat-1.8.0-SNAPSHOT/
chmod +x bin/dbcat

$tree -L 3 --filelimit 30
.
├── bin
│   ├── dbcat
│   ├── dbcat.bat
│   └── dbcat-debug
├── conf
│   ├── dbcat.properties
│   └── logback.xml
├── docs
│   ├── README.docx
│   ├── README.md
│   └── README.txt
├── LEGAL.md
├── lib [45 entries exceeds filelimit, not opening dir]
├── LICENSE
├── meta
│   └── README
└── NOTICE

5 directories, 12 files

bin/dbcat convert -H<host> -P<port> -u<user> -p<******>  -D <database> --from <from> --to <to> --all

bin/dbcat convert -H 172.30.xxx.xxx  -P 2883 -uroot -pxxxxx -D test --from obmysql40 --to mysql57 --all

$tree ~/output/dbcat-20xx-xx-xx-164533/
/home/qing.meiq/output/dbcat-20xx-xx-xx-164533/
├── tpccdb
│   └── TABLE-schema.sql
└── tpccdb-conversion.html

1 directory, 2 files

MySQL [test]> source TABLE-schema.sql
Query OK, 0 rows affected (0.044 sec)

obclient [test]> desc bmsql_customer;
+----------------+---------------+------+-----+-------------------+-----------------------------+
| Field          | Type          | Null | Key | Default           | Extra                       |
+----------------+---------------+------+-----+-------------------+-----------------------------+
| c_w_id         | bigint(20)    | NO   | PRI | NULL              |                             |
| c_d_id         | bigint(20)    | NO   | PRI | NULL              |                             |
| c_id           | bigint(20)    | NO   | PRI | NULL              |                             |
| c_discount     | decimal(4,4)  | YES  |     | NULL              |                             |
| c_credit       | char(2)       | YES  |     | NULL              |                             |
| c_last         | varchar(16)   | YES  |     | NULL              |                             |
| c_first        | varchar(16)   | YES  |     | NULL              |                             |
| c_credit_lim   | decimal(12,2) | YES  |     | NULL              |                             |
| c_balance      | decimal(12,2) | YES  |     | NULL              |                             |
| c_ytd_payment  | decimal(12,2) | YES  |     | NULL              |                             |
| c_payment_cnt  | bigint(20)    | YES  |     | NULL              |                             |
| c_delivery_cnt | bigint(20)    | YES  |     | NULL              |                             |
| c_street_1     | varchar(20)   | YES  |     | NULL              |                             |
| c_street_2     | varchar(20)   | YES  |     | NULL              |                             |
| c_city         | varchar(20)   | YES  |     | NULL              |                             |
| c_state        | char(2)       | YES  |     | NULL              |                             |
| c_zip          | char(9)       | YES  |     | NULL              |                             |
| c_phone        | char(16)      | YES  |     | NULL              |                             |
| c_since        | timestamp     | NO   |     | CURRENT_TIMESTAMP | ON UPDATE CURRENT_TIMESTAMP |
| c_middle       | char(2)       | YES  |     | NULL              |                             |
| c_data         | varchar(500)  | YES  |     | NULL              |                             |
+----------------+---------------+------+-----+-------------------+-----------------------------+
21 rows in set (0.004 sec)

MySQL [test]> show create table bmsql_customer \G
*************************** 1. row ***************************
       Table: bmsql_customer
Create Table: CREATE TABLE `bmsql_customer` (
  `c_w_id` bigint(20) NOT NULL,
  `c_d_id` bigint(20) NOT NULL,
  `c_id` bigint(20) NOT NULL,
  `c_discount` decimal(4,4) DEFAULT NULL,
  `c_credit` char(2) COLLATE utf8_unicode_ci DEFAULT NULL,
  `c_last` varchar(16) COLLATE utf8_unicode_ci DEFAULT NULL,
  `c_first` varchar(16) COLLATE utf8_unicode_ci DEFAULT NULL,
  `c_credit_lim` decimal(12,2) DEFAULT NULL,
  `c_balance` decimal(12,2) DEFAULT NULL,
  `c_ytd_payment` decimal(12,2) DEFAULT NULL,
  `c_payment_cnt` bigint(20) DEFAULT NULL,
  `c_delivery_cnt` bigint(20) DEFAULT NULL,
  `c_street_1` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL,
  `c_street_2` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL,
  `c_city` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL,
  `c_state` char(2) COLLATE utf8_unicode_ci DEFAULT NULL,
  `c_zip` char(9) COLLATE utf8_unicode_ci DEFAULT NULL,
  `c_phone` char(16) COLLATE utf8_unicode_ci DEFAULT NULL,
  `c_since` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  `c_middle` char(2) COLLATE utf8_unicode_ci DEFAULT NULL,
  `c_data` varchar(500) COLLATE utf8_unicode_ci DEFAULT NULL,
  PRIMARY KEY (`c_w_id`,`c_d_id`,`c_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
1 row in set (0.01 sec)