GGSCI (WINDOWS-0QO8SQ0) 6> dblogin userid system, password *****
Successfully logged into database.


GGSCI (WINDOWS-0QO8SQ0) 7> delete rep2
ERROR: Could not delete DB checkpoint for REPLICAT REP2 (OCI Error ORA-00942: ta
ble or view does not exist (status = 942). Deleting from checkpoint table ggate.
checkpoint, group 'REP2', key 2986303197 (0xb1ff5edd), SQL <DELETE FROM ggate.ch
eckpoint  WHERE group_name = 'REP2' AND        group_key  = 2986303197>).




GGSCI (WINDOWS-0QO8SQ0) 8> delete rep2 force
ERROR: Could not delete DB checkpoint for REPLICAT REP2 (OCI Error ORA-00942: ta
ble or view does not exist (status = 942). Deleting from checkpoint table ggate.
checkpoint, group 'REP2', key 2986303197 (0xb1ff5edd), SQL <DELETE FROM ggate.ch
eckpoint  WHERE group_name = 'REP2' AND        group_key  = 2986303197>).




GGSCI (WINDOWS-0QO8SQ0) 9> delete replicat rep2!
WARNING: Could not delete DB checkpoint for REPLICAT REP2 (OCI Error ORA-00942:
table or view does not exist (status = 942). Deleting from checkpoint table ggat
e.checkpoint, group 'REP2', key 2986303197 (0xb1ff5edd), SQL <DELETE FROM ggate.
checkpoint  WHERE group_name = 'REP2' AND        group_key  = 2986303197>).




GGSCI (WINDOWS-0QO8SQ0) 10> info all


Program     Status      Group       Lag at Chkpt  Time Since Chkpt


MANAGER     RUNNING
JAGENT      STOPPED
REPLICAT    RUNNING     REP1        00:00:00      00:00:01


直接删除时，报错Could not delete DB checkpoint for REPLICAT REP2 (OCI Error ORA-00942.
因原OGG对应用户ggate已经被删除。
只好采用强制删除
delete replicat rep2!
通过惊叹号来进行强制删除

参考：http://ranjitnagi.blogspot.com/2013/01/gg-checkpoint-table-errorerror-could.html
         http://chandu208.blogspot.com/2015/02/error-could-not-delete-db-checkpoint.html

ERROR: Could not delete DB checkpoint for REPLICAT

DB version:  11.2.0.2.0

OGG version:  11.2.1.0.3

OS Version: RHEL 6

GGSCI (oracledev10) 10> delete Replicat REP

ERROR: Could not delete DB checkpoint for REPLICAT REP (OCI Error ORA-00942: table or view does not exist (status = 942). Deleting from checkpoint table ggs_admin.ggchkpt, group 'REP', key 2292316344 (0x88a1f8b8), SQL <DELETE FROM ggs_admin.ggchkpt  WHERE group_name = 'REP' AND        group_key  = 2292316344>).

The  above error was due to REPLICAT process added without specifying NODBCHECKPOINT argument when it got created initially.

Solution:  Try deleting with "!" option

GGSCI (oracledev10) 12> delete replicat REP !

WARNING: Could not delete DB checkpoint for REPLICAT REP (OCI Error ORA-00942: table or view does not exist (status = 942). Deleting from checkpoint table ggs_admin.ggchkpt, group 'REP', key 2292316344 (0x88a1f8b8), SQL <DELETE FROM ggs_admin.ggchkpt  WHERE group_name = 'REP' AND        group_key  = 2292316344>).

Replicat REP Deleted now

Here, The “!” tells GoldenGate to ignore the checkpoint table

If we wish to create Replicat without checkpoint then use below command to create

ADD REPLICAT <group>, EXTTRAIL <trail>, NODBCHECKPOINT

If we want to create Replicat WITH checkpoint then use below command to create

ADD CHECKPOINTTABLE ggs_admin.ggchkpt          (create if not exists)

ADD REPLICAT <group>, EXTTRAIL <trail>,  CHECKPOINTTABLE ggs_admin.ggchkpt

Refer:

How Can I Delete A REPLICAT Created Without A Checkpoint Table? (Doc ID 965689.1)