Mysql 类似dblink的功能 跨库访问Oracle

笔者实验多次 还是建议不要这么搞 坑很多

mysql版本：8.0.25

查看mysql版本的方法：登录成功 mysql -h localhost -u root -p -P 3306

执行：select version();

oracle：本地mac docker下装的oracle 操作步骤

1.查看数据库引擎开启情况，默认federated为no

show engines;

2.只要在/etc/my.cnf 中添加如下配置

sudo vim /etc/my.cnf
#添加以下配置
[mysqld]
federated

3.重启mysql；

brew services restart mysql

4.然后查看federated变成了yes

CREATE TABLE "TEST"."BANK" 
   (	"ID" NUMBER(*,0), 
	"BANK_NAME" VARCHAr2(100)
   ) SEGMENT CREATION IMMEDIATE 
  PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)
  TABLESPACE "TEST_DATA" ;

CREATE SERVER OracleTest
FOREIGN DATA WRAPPER mysql
OPTIONS (USER 'TEST', PASSWORD 'TEST',HOST 'localhost', PORT 1521, DATABASE 'XE');


CREATE TABLE remote_bank (  
  `ID` int,
  `BANK_NAME` varchar(100) DEFAULT NULL
) ENGINE=FEDERATED CONNECTION='OracleTest/BANK';