Hi
I am upgrading my staging environment from postgresql 8.2.3 to 9.0.3.
I was able to do successfully.
But, when i try to import the database which is created in 8.2.0 version to 9.0.3 version environment, i am getting following error.
ERROR: constraint "xxxx” for relation "xxxx” already exist
Based on above error message it looks like the constraint for relation already exists.
Could you please follow below steps to upgrade from older version to new version::
Step 1: Perform the global dump on old cluster [ i.e PostgreSQL 8.2.3] using "pg_dumpall" binary of new PostgreSQL 9.0.
/opt/PostgreSQL/9.0/bin/pg_dumpall -d postgres -U postgres -p 5432 -g > /tmp/globaldump_oldpg823.sql
NOTE: It Dumps only global objects i.e roles,users and tablespaces,no databases.
Assuming old cluster running on the 5432 port number.
Step 2: Take the dump of the database in compressed format using new version of pg_dump binary.
Syntax: /opt/PostgreSQL/9.0/bin/pg_dump -Fc -v -p 5432 -f <dump file location> <database name>
nohup /opt/PostgreSQL/9.0/bin/pg_dump -Fc -v -p 5432 -f /tmp/demo.dmp demo>> /tmp/dump.log 2>> /tmp/dump.log &
-P => port number of old cluster
-Fc => compressed format
-v => verbose output
-f => location of dump file to store and dump file name
NOTE: Assuming old cluster running on the 5432 port number
Step 3: Restore the global dump on new cluster of PostgreSQL 9.0.2
/opt/PostgreSQL/9.0/bin/psql -d postgres -U postgres -p 5433 -f /tmp/globaldump_oldpg832.sql
NOTE: Assuming new cluster running on the 5433 port number
Step 4: Restore the compressed dump file using new version of pg_restore binary with parallel restore operation.
nohup /opt/PostgreSQL/9.0/bin/pg_restore -Fc -v -p 5433 -d demo -j 8 /tmp/demo.dmp >>/tmp/restore1.log 2>>/tmp/restore1.log &
NOTE: Assuming new cluster running on the 5433 port number
--Raghu Ram
when i query it was not found.
What could be the reason? What should i do to resolve this?
Appreciate your quick answer.
Thanks & Regards
Senthil
