Import postgres database without roles
To import a Postgres DB without roles, employ pg_dump with --no-owner and --no-acl options leaving out role and privilege details:
This operation pipes the dump straight into the target database, skipping over any nuisances related to roles.
Should there be no existing roles, consider setting up generic roles or assign existing objects to the target user:
In case you desire more control, utilize pg_restore along with the --no-owner flag:
When dealing with text-format dumps, route errors to a file:
Subsequently, look through the errors.txt to handle specific role-related concerns.
Keeping the crown: When ownership matters
If the maintenance of user roles and permissions is key for your application to function properly, you'll want to follow these steps:
- Export roles first from the source system using
pg_dumpall -g > roles.sql. - On the target system, recreate these roles through
psql -f roles.sql -U postgres. - Evaluate permissions and reconstitute as necessary, making sure everything runs as it should be.
Weighing your import strategy
Consider each aspect of the import process to meet varying situations:
- Retain ownership: Make use of
pg_dumpall -gandpg_restore --role=rolenameif sovereignty matters. - Remove privileges: When roles don't matter, command
pg_dumpalong with--no-privileges. - Decrease import errors: Determine which errors can be disregarded for more efficient operation. They say "Ignorance is bliss", not applicable everywhere though!
Post-import data integrity check
Upon import, confirm the integrity of your data and working operations:
- Check out the application's behavior to reassure data availability and manipulability.
- Test for security compliance, asserting that only authorized actions are viable.
- Investigate error logs for any overlooked issues that may need a fix.
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