mysql dblink如何鏈接mysql庫(kù)

今天就跟大家聊聊有關(guān)mysql dblink如何鏈接mysql庫(kù)，可能很多人都不太了解，為了讓大家更加了解，小編給大家總結(jié)了以下內(nèi)容，希望大家根據(jù)這篇文章可以有所收獲。

1、查看target端是否安裝了FEDERATED存儲(chǔ)引擎

 mysql> show engines ;
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| Engine             | Support | Comment                                                        | Transactions | XA   | Savepoints |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| CSV                | YES     | CSV storage engine                                             | NO           | NO   | NO         |
| MRG_MYISAM         | YES     | Collection of identical MyISAM tables                          | NO           | NO   | NO         |
| MyISAM             | YES     | MyISAM storage engine                                          | NO           | NO   | NO         |
| BLACKHOLE          | YES     | /dev/null storage engine (anything you write to it disappears) | NO           | NO   | NO         |
| MEMORY             | YES     | Hash based, stored in memory, useful for temporary tables      | NO           | NO   | NO         |
| FEDERATED          | NO      | Federated MySQL storage engine                                 | NULL         | NULL | NULL       |
| ARCHIVE            | YES     | Archive storage engine                                         | NO           | NO   | NO         |
| InnoDB             | DEFAULT | Supports transactions, row-level locking, and foreign keys     | YES          | YES  | YES        |
| PERFORMANCE_SCHEMA | YES     | Performance Schema                                             | NO           | NO   | NO         |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+

注意：如果沒(méi)有安裝FEDERATED 引擎        執(zhí)行install plugin federated soname 'ha_federated.so';

這里已經(jīng)安裝好了，只是沒(méi)有啟用

2、將federated添加到my.cnf 重啟數(shù)據(jù)庫(kù)
vi /etc/my.cnf
[mysqld]
federated

service mysql restart

mysql> show engines;
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| Engine             | Support | Comment                                                        | Transactions | XA   | Savepoints |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| InnoDB             | DEFAULT | Supports transactions, row-level locking, and foreign keys     | YES          | YES  | YES        |
| MRG_MYISAM         | YES     | Collection of identical MyISAM tables                          | NO           | NO   | NO         |
| CSV                | YES     | CSV storage engine                                             | NO           | NO   | NO         |
| BLACKHOLE          | YES     | /dev/null storage engine (anything you write to it disappears) | NO           | NO   | NO         |
| MyISAM             | YES     | MyISAM storage engine                                          | NO           | NO   | NO         |
| MEMORY             | YES     | Hash based, stored in memory, useful for temporary tables      | NO           | NO   | NO         |
| ARCHIVE            | YES     | Archive storage engine                                         | NO           | NO   | NO         |
| PERFORMANCE_SCHEMA | YES     | Performance Schema                                             | NO           | NO   | NO         |
| FEDERATED          | YES     | Federated MySQL storage engine                                 | NO           | NO   | NO         |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+

這里FEDERATED       引擎已經(jīng)啟用。


源端：
目標(biāo)的要dblink源端的表結(jié)構(gòu)
 show create table  F_ORDERINFO_DETAIL\G;
*************************** 1. row ***************************
       Table: F_ORDERINFO_DETAIL
Create Table: CREATE TABLE `F_ORDERINFO_DETAIL` (
  `SYSTEM_TYPE` varchar(100) DEFAULT NULL,
  `ORDER_DATE` int(6) DEFAULT NULL,
  `CUSTOMER_ID` varchar(40) DEFAULT NULL,
  `UBI_UID` varchar(40) DEFAULT NULL,
  `FOI_ORDERTIME` varchar(100) DEFAULT NULL,
  `FOI_ORDERNO` varchar(40) DEFAULT NULL,
  `FOI_KEY` varchar(2500) DEFAULT NULL,
  `FOI_KEYTYPE` varchar(40) DEFAULT NULL,
  `CODENAME` varchar(100) DEFAULT NULL,
  `ORDER_STATUS` varchar(20) DEFAULT NULL,
  `FOI_ORDERTYPE` varchar(60) DEFAULT NULL,
  `QYZM` int(11) DEFAULT NULL,
  `GDCZ` int(11) DEFAULT NULL,
  `GLRY` int(11) DEFAULT NULL,
  `QYDWTZ` int(11) DEFAULT NULL,
  `FRDWTZ` int(11) DEFAULT NULL,
  `FRZWRZ` int(11) DEFAULT NULL,
  `CXFR` int(11) DEFAULT NULL,
  `CXGD` int(11) DEFAULT NULL,
  `CXGG` int(11) DEFAULT NULL,
  `ORDER_TYPE` varchar(20) DEFAULT NULL,
  `DESC_INFO2` varchar(50) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8
1 row in set (0.00 sec)

mysql> select count(*) from  F_ORDERINFO_DETAIL;
+----------+
| count(*) |
+----------+
|     2900 |
+----------+


目標(biāo)端：

 CREATE TABLE `t` (
  `SYSTEM_TYPE` varchar(100) DEFAULT NULL,
  `ORDER_DATE` int(6) DEFAULT NULL,
  `CUSTOMER_ID` varchar(40) DEFAULT NULL,
  `UBI_UID` varchar(40) DEFAULT NULL,
  `FOI_ORDERTIME` varchar(100) DEFAULT NULL,
  `FOI_ORDERNO` varchar(40) DEFAULT NULL,
  `FOI_KEY` varchar(2500) DEFAULT NULL,
  `FOI_KEYTYPE` varchar(40) DEFAULT NULL,
  `CODENAME` varchar(100) DEFAULT NULL,
  `ORDER_STATUS` varchar(20) DEFAULT NULL,
  `FOI_ORDERTYPE` varchar(60) DEFAULT NULL,
  `QYZM` int(11) DEFAULT NULL,
  `GDCZ` int(11) DEFAULT NULL,
  `GLRY` int(11) DEFAULT NULL,
  `QYDWTZ` int(11) DEFAULT NULL,
  `FRDWTZ` int(11) DEFAULT NULL,
  `FRZWRZ` int(11) DEFAULT NULL,
  `CXFR` int(11) DEFAULT NULL,
  `CXGD` int(11) DEFAULT NULL,
  `CXGG` int(11) DEFAULT NULL,
  `ORDER_TYPE` varchar(20) DEFAULT NULL,
  `DESC_INFO2` varchar(50) DEFAULT NULL
) ENGINE=federated connection = 'mysql://root:123456@192.168.1.5:3306/czb/F_ORDERINFO_DETAIL';

1. 注意：源端表結(jié)構(gòu) engine=federated connection = 'mysql://用戶(hù):密碼@IP地址:端口/庫(kù)名稱(chēng)/表名稱(chēng)';

mysql> select count(*) from  F_ORDERINFO_DETAIL;
+----------+
| count(*) |
+----------+
|     2900 |
+----------+


源端：

mysql> insert into F_ORDERINFO_DETAIL select * from F_ORDERINFO_DETAIL;
Query OK, 2900 rows affected (0.28 sec)
Records: 2900  Duplicates: 0  Warnings: 0


mysql> commit;
Query OK, 0 rows affected (0.00 sec)


mysql> select count(*) from F_ORDERINFO_DETAIL;
+----------+
| count(*) |
+----------+
|     5800 |
+----------+
1 row in set (0.00 sec)


目標(biāo)端：

mysql> select count(*) from t;
+----------+
| count(*) |
+----------+
|     5800 |
+----------+
1 row in set (0.00 sec)

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