I'm totally new to Heroku and Postgres and I'm trying to figure out how to restore and access the Postgres db in Heroku. I do have backup that taken fro pgAdmin III .backup file.
Any help with how to restore the Postgres db in Heroku would be greatly appreciated.
Restore to local database
Load the dump into your local database using the pg_restore tool. If objects exist in a local copy of the database already, you might run into inconsistencies when doing a pg_restore. Pg_restore does not drop all of the objects in the database when loading the dump.
This will usually generate some warnings, due to differences between your Heroku database and a local database, but they are generally safe to ignore.
$ pg_restore --verbose --clean --no-acl --no-owner -h localhost -U myuser -d mydb latest.dump
Related
I have an un-updated local Postgres server, running on a docker container, now I want to update all new records from Production DB,
which runs on Azure Postgres DB.
I'm aware of the pg_dump as in this Answer
but, I'm not clear where should I commend it - the Azure DB doesn't know the Local one and vice versa?
There are multiple methods which you can try.
The most common and simple approach is to use pg_dump and pg_restore commands in bash to upgrade the database.
In above mentioned method, you first create a dump from the source server using pg_dump. Then you restore that dump file to the target server using pg_restore.
To back up an existing PostgreSQL database, run the following command:
pg_dump -Fc -v --host=<host> --username=<name> --dbname=<database name> -f <database>.dump
Once the file has been created, download it in local environment.
After you've created the target database, you can use the pg_restore command and the --dbname parameter to restore the data into the target database from the dump file.
pg_restore -v --no-owner --host=<server name> --port=<port> --username=<user-name> --dbname=<target database name> <database>.dump
To find more upgrade methods, you can refer https://learn.microsoft.com/en-us/azure/postgresql/how-to-upgrade-using-dump-and-restore#method-1-using-pg_dump-and-psql.
To get more details on pg_dump and pg_restore methood, please refer Microsoft Official document Migrate your PostgreSQL database by using dump and restore.
I am having some difficulties with restoring the schema of a table. I dumped my Heroku Postgres db and I used pg_restore to restore one table from it into my local db (it has more than 20 tables). It was successfully restored, but I was having issues when I tried to insert new data into the table.
When I opened up my database using psql, I found out that the restored table is available with all the data, but its schema has zero rows. Is there anyway I could import both the table and its schema from the dump? Thank you very much.
This is how I restored the table into my local db:
pg_restore -U postgres --dbname my_db --table=message latest.dump
Edit:
I tried something like this following the official docs, but it just gets blocked and nothing happened. My db is small, no more than a couple of megabytes and the table's schema I am trying to restore has no more than 100 row.
pg_restore -U postgres --dbname mydb --table=message --schema=message_id_seq latest.dump
As a more general answer (I needed to restore a single table from a huge backup), you may want to take a look at this post: https://thequantitative.medium.com/restoring-individual-tables-from-postgresql-pg-dump-using-pg-restore-options-ef3ce2b41ab6
# run the schema-only restore as root
pg_restore -U postgres --schema-only -d new_db /directory/path/db-dump-name.dump
# Restore per table data using something like
pg_restore -U postgres --data-only -d target-db-name -t table_name /directory/path/dump-name.dump
From the Heroku DevCenter here
Heroku Postgres is integrated directly into the Heroku CLI and offers
many helpful commands that simplify common database tasks
You can check here if your environment is correctly configured.
In this way, you can use the Heroku CLI pg:pull command to pull remote data from a Heroku Postgres database to a local database on your machine.
For example:
$ heroku pg:pull HEROKU_POSTGRESQL_MAGENTA mylocaldb --app sushi
We are about to upgrade from pgsql 9.3 to 10.x. Part of the requirement is to be able to switch back to 9.3 in the case of some disaster (some massive but of course, unlikely incompatibility).
I tried pg_restoring a dump taken from one of our dev v. 10.x databases to a pgsql9.3 server, and got a lot of errors.
Is there any known "roll back path" from v 10.x to v 9.3?
Actually you can use Pg_Dump will give you a full sql file including all DDL and DML statements to recreate your database in another place (or restore).
You can do statement in cmd for backup use Pg_Dump
pg_dump -U username -d database > filename.sql
For more documentation and command use you can see here Pg_Dump
And you can restore use Psql command like this
psql -U username -d database -f filename.sql
You can use the pg_dump from pg9.3 to backup the pg10 database. Then use that backup and pg_restore from pg9.3 again to restore.
We have been using 9.5 postgres.
And we use pgdump to get backup files from that database and then subsequently use it to restore on a 9.6 postgres.
We were unable to restore successfully. Usually the minor version upgrade does not mean backwards breaking.
I am wondering what's the issue causing us to be unable to successfully restore on a 9.6 database.
We need to do so just in case we need to restore from archived data backups.
I was facing the same error when upgrading from 9.3 to 9.6.
The restore failed every time I tried but the dump was successful.
My solution to this problem was not to use the custom format! Instead I used the plain format. So I tried plain format with file extension sql, with utf8 encoding as user postgres. And obviously don't forget to include pre-data, data and post-data because otherwise your restore won't be complete. This works perfectly.
If your dump is ok, also try a full vacuum before the dump. If the vacuum is not ok, this might be your problem.
To Take Dump
pg_dump --username=postgres --format=c --file=e:/testdbdump.sql testdb
OR
pg_dump -U username databasename >>sqlfile.sql
To Restore
pg_restore --username=postgres --dbname=testdb<d:\sqlfile.sql
pg_restore --username=postgres --dbname=testdb <d:\sqlfile.sql
pg_restore --username=postgres --dbname=testdb <d:\testDBApr18.sql
pg_restore --username=postgres --dbname=testdb <c:\Backup\testdbDBApr18.sql
// PG DUMP & RESTORE THAT WORKS FOR ME
pg_dump -U postgres -h localhost --format=c testdb > db_dump_file.dump
pg_restore -U postgres -h localhost -v -d testdb db_dump_file.dump
I'm looking to load a database from a backup.gz. The backup is raw sql generated from pg_dump -U postgres app_development -f backup.gz -Z9.
I've tried dropping the db with psql -Upostgres -c "drop database app_development" but I get:
ERROR: database "app_development" is being accessed by other users
DETAIL: There are 3 other sessions using the database.
The same thing happens when I use dropdb.
I don't want to dump to a non-ascii version so I don't think I can use pg_restore.
Also, I'm not sure if it helps, but all this is happening in docker.