我们做如下测试
在源端执行表的truncate
SQL> truncate table tcustmer;
Table truncated.
在目的端，查看表数据
SQL> select count(*) from tcustmer;
COUNT(*)
----------
2
数据并没有同步
我们如何让Goldengate实现DDL操作的同步呢？
要想支持DDL同步，需要在源数据库上做些设置，使得可以跟踪DDL操作。包括如下内容Trigger、marker和history table，一个用户角色和其他各式各样的数据库对象。
首先要配置GLOBALS参数，告诉gg使用那个schema来存储DDL操作。
GGSCI (localhost.localdomain) 19> edit params ./GLOBALS
-- GoldenGate GLOBALS parameter file
--
GGSCHEMA GGDDL
2. 使用sqlplus 创建ggddl用户，并安装ddl支持
SQL> conn / as sysdba
Connected.
SQL> create user ggddl identified by ggddl ;
User created.
SQL> grant connect,resource to ggddl;
Grant succeeded.
关闭数据回收站功能
运行marker_setup.sql (ogg的安装目录，进入sqlplus)
[oracle@localhost ogg]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.1.0 Production on Fri Sep 11 19:58:40 2015
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> @marker_setup.sql
Marker setup script
You will be prompted for the name of a schema for the Oracle GoldenGate database objects.
NOTE: The schema must be created prior to running this script.
NOTE: Stop all DDL replication before starting this installation.
Enter Oracle GoldenGate schema name:GGDDL
Marker setup table script complete, running verification script...
Please enter the name of a schema for the GoldenGate database objects:
Setting schema name to GGDDL
MARKER TABLE
-------------------------------
OK
MARKER SEQUENCE
-------------------------------
OK
Script complete.
在弹出对话框输入GGSCHEMA的名称
运行ddl_setup.sql
SQL> @ddl_setup.sql
运行role_setup.sql
创建好角色后，并不是要把这个角色赋予ggddl用户，而是要将该角色赋予Extract，Replicat等使用的schema 。
我们之前配置的是system用户
SQL> GRANT GGS_GGSUSER_ROLE TO system;
Grant succeeded.
启用ddl，其实就是使trigger enable
SQL> @ddl_enable.sql
Trigger altered.
关闭Manager，Extract，Replicat
源端
GGSCI (localhost.localdomain) 1> stop Extract eorakk
GGSCI (localhost.localdomain) 5> stop mgr ！
目的端
GGSCI (localhost.localdomain) 1> stop replicat rorakk
Sending STOP request to REPLICAT RORAKK ...
Request processed.
GGSCI (localhost.localdomain) 2> stop manager
编辑Extract参数
GGSCI (localhost.localdomain) 5> edit params eorakk
--
-- Change Capture parameter file to capture
-- TCUSTMER and TCUSTORD Changes
--
EXTRACT EORAKK
USERID system, PASSWORD oracle
RMTHOST 192.168.199.104, MGRPORT 7809
EXTTRAIL ./dirdat/KK
DDL INCLUDE ALL
TABLE SCOTT.TCUSTMER;
TABLE SCOTT.TCUSTORD;
在原有基础上添加一行DDL INCLUDE ALL
编辑Replicat参数
GGSCI (localhost.localdomain) 4> edit params rorakk
--
-- Change Delivery parameter file to apply
-- TCUSTMER and TCUSTORD Changes
--
REPLICAT RORAKK
USERID system, PASSWORD oracle
HANDLECOLLISIONS
ASSUMETARGETDEFS
DISCARDFILE ./dirrpt/RORAKK.DSC, PURGE
DDL INCLUDE MAPPED
MAP scott.tcustmer, TARGET scott.tcustmer;
MAP scott.tcustord, TARGET scott.tcustord;
在原有基础上添加一行DDL INCLUDE MAPPED
启动Manager、Extract、Replicat
源端
GGSCI (localhost.localdomain) 6> start manager
Manager started.
GGSCI (localhost.localdomain) 7> start extract eorakk
Sending START request to MANAGER ...
EXTRACT EORAKK starting
目的端
GGSCI (localhost.localdomain) 5> start mgr
Manager started.
GGSCI (localhost.localdomain) 16> start replicat rorakk
Sending START request to MANAGER ...
REPLICAT RORAKK starting
验证数据
源端
SQL> truncate table tcustmer;
Table truncated.
SQL> desc tcustmer
Name Null? Type
----------------------------------------- -------- ----------------------------
CUST_CODE NOT NULL VARCHAR2(4)
NAME VARCHAR2(30)
CITY VARCHAR2(20)
STATE CHAR(2)
SQL> alter table tcustmer add state_desc varchar2(30);
Table altered.
目的端
SQL> select * from tcustmer;
no rows selected
SQL> desc tcustmer
Name Null? Type
----------------------------------------- -------- ----------------------------
CUST_CODE NOT NULL VARCHAR2(4)
NAME VARCHAR2(30)
CITY VARCHAR2(20)
STATE CHAR(2)
STATE_DESC VARCHAR2(30)
数据已同步。