--实验：对于仅有dml同步的goldengate进程，如果源端进行ddl加字段操作，如何处理对应的进程

--源端orcl
--首先检查进程状态，running状态：
[Oracle@localhost ogg]$ ./ggsci
GGSCI (localhost.localdomain) 1> info all

Program    Status      Group      Lag at Chkpt  Time Since Chkpt

MANAGER    RUNNING                                         
EXTRACT    RUNNING    DPUMP1      00:00:00      00:00:08   
EXTRACT    RUNNING    EXT1        00:00:00      00:00:06   

--停止抽取进程及传输进程：
GGSCI (localhost.localdomain) 2> stop *

Sending STOP request to EXTRACT DPUMP1 ...
Request processed.

Sending STOP request to EXTRACT EXT1 ...
Request processed.

GGSCI (localhost.localdomain) 3> info all

Program    Status      Group      Lag at Chkpt  Time Since Chkpt

MANAGER    RUNNING                                         
EXTRACT    STOPPED    DPUMP1      00:00:00      00:00:11   
EXTRACT    STOPPED    EXT1        00:00:00      00:00:09 

--目标端orcltest
--确认复制进程状态为running，并停掉进程：
GGSCI (localhost.localdomain) 8> info all

Program    Status      Group      Lag at Chkpt  Time Since Chkpt

MANAGER    RUNNING                                         
REPLICAT    RUNNING    REP1        00:00:00      00:00:06   

GGSCI (localhost.localdomain) 9> stop *

Sending STOP request to REPLICAT REP1 ...
Request processed.

--源端orcl
--对同步的表添加一个字段
[oracle@localhost ogg]$ sqlplus / as sysdba
SQL> alter table ggs.test add new_col varchar2(10);

Table altered.

SQL> exit

--目标端orcltest
--同样添加字段：
[oracle@localhost ogg]$ sqlplus / as sysdba
SQL> alter table ggs.test add new_col varchar2(10);

Table altered.

SQL> exit

--源端orcl
--启动抽取，传输进程
[oracle@localhost ogg]$ ./ggsci
GGSCI (localhost.localdomain) 2> start *

Sending START request to MANAGER ...
EXTRACT DPUMP1 starting

Sending START request to MANAGER ...
EXTRACT EXT1 starting

GGSCI (localhost.localdomain) 4> info all

Program    Status      Group      Lag at Chkpt  Time Since Chkpt

MANAGER    RUNNING                                         
EXTRACT    RUNNING    DPUMP1      00:40:12      00:00:04   
EXTRACT    RUNNING    EXT1        00:02:55      00:00:08 

--目标端orcltest
--启动复制进程 
[oracle@localhost ogg]$ ./ggsci
GGSCI (localhost.localdomain) 2> start *

Sending START request to MANAGER ...
REPLICAT REP1 starting

GGSCI (localhost.localdomain) 5> info all

Program    Status      Group      Lag at Chkpt  Time Since Chkpt

MANAGER    RUNNING                                         
REPLICAT    RUNNING    REP1        00:00:00      00:00:01   

--源端orcl
--进行数据修改测试
[oracle@localhost ~]$ sqlplus / as sysdba
SQL> select count(*) from ggs.test;

  COUNT(*)
----------
        33

SQL> delete from ggs.test where rownum commit;

Commit complete.

SQL> insert into ggs.test (username,user_id,account_status,default_tablespace,temporary_tablespace,created,profile,new_col)
values ('a','7','open','one','temp',sysdate,'default','test');  2 

1 row created.

SQL> commit;

Commit complete.

SQL>

--目标端orcltest
--对应的测试结果：结果正确，说明同步进程是正常的
SQL> select count(1) from ggs.test;

  COUNT(1)
----------
        29
       
SQL> select count(*) from ggs.test;

  COUNT(*)
----------
        30

SQL> exit

实验结论：对于正常进行的dml复制进程，如果目标表需要加字段，通过停止进程，源端目标端同时进行ddl操作，
然后重新启动进程就可以了，复制进程会正常进行。

：

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