本文轉自：https://www.cnblogs.com/eastsea/p/4232300.html
一、摘要
1. 不支持和有限支持的DDL類型
(1). Oracle數據庫保留的Schema，GoldenGate是不支持的，如SYS、SYSTEM、PUBLIC等等
(2). GoldenGate10g DDL不支持Oracle回收站功能
(3). GoldenGate支持不超高2M長度的DDL語句
(4). GoldenGate只支持單向的DDL複製，不支持雙向的DDL複製
(5). GoldenGate只支持源端和目標端結構一直的
2. DDL處理方法
(1). 不支持DDL類型的處理方法
a. 不支持的Schema，OGG默認不復制，不許更多設定
b. 關閉Oracle回收站：alter system set recyclebin=off scope=both
(2). 受限支持DDL類型的處理費方法
a. 通過腳本ddl_ddl2file.sql獲取被忽略的Oracle DDL操作，將其獲取的操作放在USER_DUMP_DEST目錄一個文本文件中
b. 投遞過程中必須使用ASSUMETARGETDEFS參數
3. DDL複製的配置
(1). Oracle DDL複製的原理
(2). 安裝GoldenGate DDL對象
(3). 配置DDL支持
(4). DDL異常與錯誤處理
二、Oracle DDL複製的原理
1. DDL複製原理
基於數據庫全局Trigger的複製，在源數據建立一個Oracle全庫級別的Trigger捕捉DDL操作到中間表，Extract讀取中間表DDL語句並與DML語句根據csn排序，Pump投遞到目標端，目標端Replicat在重現該DDL語句
2. DDL複製和DML複製的區別
(1). DDL複製是基於Trigger
(2). DML複製是基於日誌
(3). 只是在主Extract進程中通過scn號安裝發生順序進行組裝，保證DDL操作和DML操作按照原來的順序之下你給
3. DDL複製和DML複製的關係
DDL複製和DML複製可以項目獨立，可以只啓動DDL複製，也可以只啓動DML複製，相互並不影響，他們之間只是在Extract進行組裝時根據scn號進行排序
三、安裝GoldenGate DDL對象
Step1. 停止Extract進程組
[ggate@gavinprod ~]$ cd $GGATE
[ggate@gavinprod ggate]$ ./ggsci
Oracle GoldenGate Command Interpreter for Oracle
Version 11.2.1.0.1 OGGCORE_11.2.1.0.1_PLATFORMS_120423.0230_FBO
Linux, x64, 64bit (optimized), Oracle 11g on Apr 23 2012 08:32:14
Copyright (C) 1995, 2012, Oracle and/or its affiliates. All rights reserved.
GGSCI (gavinprod.com) 1> stop E*
EXTRACT EXT1 is already stopped.
EXTRACT EXT2 is already stopped.
Step2. 指定源端數據庫的模式
GGSCI (gavinprod.com) 2> edit params ./GLOBALS
GGSCHEMA ggate
Step3. 停止Manager進程
GGSCI (gavinprod.com) 5> stop MGR !
Manager is already stopped.
Step4. 關閉Oracle的recyclebin
[oracle@gavinprod bin]$ sqlplus '/as sysdba'
SQL*Plus: Release 11.2.0.1.0 Production on Fri Jan 30 22:50:10 2015
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Connected to an idle instance.
SQL> show parameter recyclebin
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
recyclebin string OFF
SQL> alter system set recyclebin = off scope = both;
Step5. 安裝DDL對象
[oracle@gavinprod ggate]$ sqlplus '/as sysdba'
SQL*Plus: Release 11.2.0.1.0 Production on Fri Jan 30 22:54:49 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> @/opt/oracle/ggate/marker_setup.sql
SQL> @/opt/oracle/ggate/ddl_setup.sql
SQL> @/opt/oracle/ggate/role_setup.sql
SQL> @/opt/oracle/ggate/ddl_enable.sql
Step6. 驗證DDL對象
[oracle@gavinprod ggate]$ sqlplus '/as sysdba'
SQL*Plus: Release 11.2.0.1.0 Production on Fri Jan 30 22:54:49 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> @/opt/oracle/ggate/marker_status.sql
四、配置DDL支持
Step1. 停止Extract 和 Replicat進程組
--Extract 端
GGSCI (gavinprod.com) 1> stop E*
EXTRACT EXT1 is already stopped.
EXTRACT EXT2 is already stopped.
GGSCI (gavinprod.com) 2> stop D*
EXTRACT DMP2 is already stopped.
--Replicat 端
GGSCI (odellprod.com) 1> stop R*
REPLICAT REP1 is already stopped.
REPLICAT REP2 is already stopped.
Step2. 修改Extract配置文件
GGSCI (gavinprod.com) 6> view params EXT2
extract ext2
userid ggate@gavinprod, password oracle
exttrail /opt/oracle/ggate/dirdat/ld
DDL INCLUDE ALL
DDLOPTIONS ADDTRANDATA, REPORT
table source_prod.*;
Step3. 修改Replicat配置文件
GGSCI (odellprod.com) 2> view params REP2
replicat rep2
ASSUMETARGETDEFS
userid ggate@odellprod,password oracle
discardfile /opt/oracle/ggate/dirdat/rep2_discard.txt, append, megabytes 10
DDL INCLUDE MAPPED
DDLOPTIONS REPORT
map source_prod.*, target target_prod.*;
Step4. 重啓進程
--Extract 端
GGSCI (gavinprod.com) 1> start E*
GGSCI (gavinprod.com) 2> start D*
--Replicat 端
GGSCI (odellprod.com) 1> start R*
Step5. 驗證結果
1. 目標端建立table bxj_ogg_ddl
create table bxj_ogg_ddl (id number, name varchar2 (100) );
2. 目標端查看所創建的table是否存在
select * from dba_objects where object_name = 'BXJ_OGG_DDL';
3. 如果存在，測試成功