Thinking Out Loud

July 13, 2016

GoldenGate 12.2 DDLOPTIONS MAPSESSIONSCHEMA

Filed under: 12c,GoldenGate — mdinh @ 4:36 am

This is probably not a 12.2 specific features and since I only tested for 12.2, I am not going to vouch for other versions.

Be careful when qualifying schema with DDL replication especially when the source and target schemas are not the same.

Example: Source schema is DEMO and Target schema is DEMO_REP

What happens to DDL replication when the following is used?

alter table demo.t add constraint t_pk primary key(id) using index demo.t_pk_ix;

oracle@arrow:hawk:/u01/app/12.2.0.1/ggs01
$ sqlplus demo/demo @t.sql

SQL*Plus: Release 11.2.0.4.0 Production on Tue Jul 12 20:36:55 2016

Copyright (c) 1982, 2013, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Release 11.2.0.4.0 - 64bit Production

ARROW:(DEMO@hawk):PRIMARY> drop table demo.t purge;

Table dropped.

ARROW:(DEMO@hawk):PRIMARY> create table demo.t(id int);

Table created.

ARROW:(DEMO@hawk):PRIMARY> create unique index demo.t_pk_ix on demo.t(id);

Index created.

ARROW:(DEMO@hawk):PRIMARY> alter table demo.t add constraint t_pk primary key(id) using index demo.t_pk_ix;

Table altered.

ARROW:(DEMO@hawk):PRIMARY>

Target: ggserr.log

2016-07-12 20:37:00  INFO    OGG-00482  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL found, operation [create table demo.t(id int) (size 27)].
2016-07-12 20:37:00  INFO    OGG-00489  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL is of mapped scope, after mapping new operation [create table "DEMO_REP"."T"(id int) (size 35)].

2016-07-12 20:37:00  INFO    OGG-00482  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL found, operation [create unique index demo.t_pk_ix on demo.t(id) (size 46)].
2016-07-12 20:37:00  INFO    OGG-00489  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL is of mapped scope, after mapping new operation [create unique index "DEMO_REP"."T_PK_IX" on "DEMO_REP"."T"(id) (size 62)].

2016-07-12 20:37:00  INFO    OGG-00482  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL found, operation [alter table demo.t add constraint t_pk primary key(id) using index demo.t_pk_ix (size 79)].
2016-07-12 20:37:00  INFO    OGG-00489  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL is of mapped scope, after mapping new operation 
[alter table "DEMO_REP"."T" add constraint t_pk primary key(id) using index demo.t_pk_ix (size 87)].

2016-07-12 20:37:00  ERROR   OGG-00516  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  Fatal error executing DDL replication: error 
[Error code [1418], ORA-01418: specified index does not exist SQL alter table "DEMO_REP"."T" add constraint t_pk primary key(id) using index demo.t_pk_ix 
/* GOLDENGATE_DDL_REPLICATION */], due to explicit ABEND error handling and filter [include all (default)].
2016-07-12 20:37:04  ERROR   OGG-01668  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  PROCESS ABENDING.

Notice using index demo.t_pk_ix did not get mapped accordingly.

How do we fixed this?

The simple solution is don’t prefix schema name.

2016-07-12 20:53:39  INFO    OGG-00482  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL found, operation [create table y(id int) (size 22)].
2016-07-12 20:53:39  INFO    OGG-00489  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL is of mapped scope, after mapping new operation [create table "DEMO_REP"."Y"(id int) (size 35)].

2016-07-12 20:53:39  INFO    OGG-00482  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL found, operation [create unique index y_pk_ix on y(id) (size 36)].
2016-07-12 20:53:39  INFO    OGG-00489  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL is of mapped scope, after mapping new operation [create unique index "DEMO_REP"."Y_PK_IX" on "DEMO_REP"."Y"(id) (size 62)].

2016-07-12 20:53:40  INFO    OGG-00482  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL found, operation [alter table y add constraint y_pk primary key(id) using index y_pk_ix (size 69)].
2016-07-12 20:53:40  INFO    OGG-00489  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL is of mapped scope, after mapping new operation 
[alter table "DEMO_REP"."Y" add constraint y_pk primary key(id) using index y_pk_ix (size 82)].

I know what you are probably thinking. What if login to the schema is not allowed?

DDLOPTIONS MAPSESSIONSCHEMA DEMO, TARGET DEMO_REP, MAPSCHEMAS

2016-07-12 21:27:10  INFO    OGG-00482  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL found, operation [alter table demo.t add constraint t_pk primary key(id) using index demo.t_pk_ix (size 79)].
2016-07-12 21:27:10  INFO    OGG-00489  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL is of mapped scope, after mapping new operation 
[alter table "DEMO_REP"."T" add constraint t_pk primary key(id) using index demo.t_pk_ix (size 87)].
2016-07-12 21:27:10  INFO    OGG-01369  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL operation mapped to target database [T], new DDL operation 
[alter table "DEMO_REP"."T" add constraint t_pk primary key(id) using index DEMO_REP.t_pk_ix (size 91)].
2016-07-12 21:27:10  INFO    OGG-00487  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL operation included [INCLUDE MAPPED], optype [ALTER], objtype [TABLE], objowner [DEMO_REP], objname [T].
2016-07-12 21:27:10  INFO    OGG-01562  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  Source schema DEMO is mapped to target schema DEMO_REP to set the current schema for DDL execution.
2016-07-12 21:27:10  INFO    OGG-01407  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  Setting current schema for DDL operation to [DEMO_REP].
2016-07-12 21:27:10  INFO    OGG-00484  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  Executing DDL operation.
2016-07-12 21:27:10  INFO    OGG-00483  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  DDL operation successful.
2016-07-12 21:27:10  INFO    OGG-01408  Oracle GoldenGate Delivery for Oracle, r_hawk.prm:  Restoring current schema for DDL operation to [GGS_ADMIN].

Happy Replication!

Reference: https://docs.oracle.com/goldengate/1212/gg-winux/GWURF/gg_parameters037.htm#GWURF451

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