skip a transaction in goldengate

skip a transaction in goldengate

[oracle@db ]$ ggsci

Oracle GoldenGate Command Interpreter for Oracle
Version 12.1.2.1.0 OGGCORE_12.1.2.1.0_PLATFORMS_140727.2135.1_FBO
Linux, x64, 64bit (optimized), Oracle 12c on Aug 7 2014 10:21:34
Operating system character set identified as UTF-8.

Copyright (C) 1995, 2014, Oracle and/or its affiliates. All rights reserved.

GGSCI (db) 1> info all

Program Status Group Lag at Chkpt Time Since Chkpt

MANAGER RUNNING
EXTRACT RUNNING DP 00:00:00 00:00:07
EXTRACT RUNNING EXT 00:00:00 00:00:08
REPLICAT ABENDED REP 00:00:00 00:00:09

GGSCI (db) 1> info rep rep

REPLICAT REP Last Started 2018-07-30 11:40 Status RUNNING
Checkpoint Lag 00:00:00 (updated 00:00:01 ago)
Process ID 17208
Log Read Checkpoint File ./dirdat/ab000174
2018-07-30 18:24:38.905361 RBA 181415
首先先找到replicat进程当前应用到的rba,也就是csn(commit sequence number)，
定位下次应用的起始RBA,它就是在trail文件中下一次replicat进程将要fseek() call 并起动进程的位置(actual byte position )

Logdump 297 >open dirdat/ab000174
Current LogTrail is /data/app/oracle/gg11/dirdat/ab000174
Logdump 298 >pos 181415
Reading forward from RBA 181415 Logdump 297 >open dirdat/ab000174
Current LogTrail is /data/app/oracle/gg11/dirdat/ab000174
Logdump 298 >pos 181415
Reading forward from RBA 181415
Logdump 299 >n

2018-07-30 18:54:38.805311 GGSPKUpdate Len 69 RBA 261415
Name: ICME.ICME_STUDENT
After Image: Partition 4 G b
0011 0000 000d 0000 0009 3131 3134 3032 3041 5900 | ..........1114020AY.
0000 0500 0000 0133 0018 000c 0000 0008 bfa8 bac5 | .......3............
d6d8 b8b4 001d 0015 0000 3230 3132 2d31 302d 3331 | ..........2018-07-30
3a31 373a 3034 3a33 39 | :18:54:38
Logdump 300 >n

2018-07-30 18:56:48.805311 FieldComp Len 23 RBA 661415
Name: ICME.ICME_PROJECT_SCORE
After Image: Partition 4 G m
0000 000a 0000 0000 0000 0252 1521 0001 0005 0000 | ...........R.!......
0001 33 | ..3

Logdump 301 >exit

第一个n定位显示出当前应用的记录，要跳过这个事务要再输一个n，可以看到下一个记录的rba是661415。修改replicat进程启动时的rba指定为661415
GGSCI (db) 1> alter replicat REP, extrba 661415
REPLICAT altered.
GGSCI (db) 2> start REP

Sending START request to MANAGER ...
REPLICAT rep starting
如果还有失败的事务还可以继续next用上面的方法，不过如果有几个连续的事务需要skip，那就可以用另外一个方法.不过跳过的事务数是未知的，会记录到discard文件中
start rep REP skiptransaction