I have a python script to modify a PostgreSQL database with a csv file. The script, the csv and the database used to be on the same private server. I'd like to migrate on AWS so I do some experiments. My first attempt is to run the script on my server and modify the new PostgreSQL database created with RDS. So everything seems to work except that I don't have the pg_read_server_files role on my "main" database user. As far as I understand this is normal, but I don't know what I should do to achieve my mission.
Any ideas ?
Thanks for reading
Related
I'm working on trying to setup my local database with some mock data to work with. We have a development AWS account with a postgres database. I would like to create a backup of it, export it to my local computer, and restore to my local postgres database.
I've been trying to find how to do this online, but everything I'm finding is on how to backup to AWS and to restore back to AWS. I tried creating a snapshot and exporting it via S3 - but the snapshot doesn't produce a sql file to restore from like I was expecting.
If anyone can point me in the right direction I would very much appreciate it :)
I am afraid that the only chance you have is pg_dump/pg_restore.
Even if Amazon lets you get your hands on its file system backups, which I doubt, they may be of little use to you, since Amazon runs modified versions of PostgreSQL and you cannot be sure that the physical file format is identical to PostgreSQL.
I would be happy to get your help / feedback re data load.
Goal:
Load source data from a Postgres database, which is located in GCP project A to another Postgres database, which is located in GCP project B.
Challenge:
Get a connection (I have an IAM account with sufficient rights to run a COPY TO / COPY FROM command) to the Postgres DB in GCP Project A and copy the table either to a CSV or create a dump that can be used in order to be inserted to another Postgres DB in GCP Project B.
How do I connect to the database (e.g. if I create a key, where shall I store the json keyfile and would that approach even be feasible?) with this IAM email account?
Other ways I've researched were to use psycopg2 (thus I could use the function cursor.copy_expert (which doesn’t need any superuser right or Postgres user credentials and copy the data), but I didn’t succeed in connecting to the database with psycopg2 due to challenges with cloud proxy.
Another idea was to use pg_dump or gcloud sql export csv.
I would be curious if some of you were facing a similar challenge and how did you solve it and what might be the best way/practice
You can have a try out database migration service. You can set up a continuous migration configuration and use Cloud SQL for PostgreSQL.
Hello after a lot of searching I've come to these solutions:
If you have continuous copy, you need to use the database migration service, check this documentation.
If you have one shot copy:
you can restore your instance, see the bottom page of this documentation
you can create a bucket and backup your instance on it, then import it from the other project
This question already has answers here:
Export and import table dump (.sql) using pgAdmin
(6 answers)
Closed 1 year ago.
Let I first state that I am not a DBA-guy but I do have a question regarding restoring remote databases using PG Admin.
I have this PG Admin tool (v4.27) running in a Docker container and I use this portal to maintain two separate Postgress databases, both running in a Docker container as well. I installed PG Agent in both database containers and run scheduled daily backup's, defined via PG Admin and stored in the container of each corresponding databases. So far so good.
Now I want to restore one of these databases by using the latest daily backup file (*.sql), but the Restore Dialog of PG Admin only looks for files stored locally (the PG Admin container)?
Whatever I tried or searched for on the internet, to me it seems not possible to show a list of remote backup files in PG Admin or run manually a remote SQL file. Is this even possible in PG Admin? Running psql in the query editor is not possible (duh ...) and due to not finding the remote SQL-restore file I have no clue how to run this code within PG Admin on the remote corresponding database container.
The one and only solution so far I can think of, is scheduling a restore which has no calendar and should be triggered manually when needed, but it's not the prettiest solution.
Do I miss something or did I overlook the right documentation or have I created a silly, unmaintainable solution?
Thanks in advance for thinking along and kind regards,
Aad Dijksman
You cannot restore a plain format dump (an SQL script) with pgAdmin. You will have to use psql, the command line client.
COPY statements and data are mixed in such a dump, and that would make pgAdmin choke.
The solution by #Laurenz Albe points out that it is best to use the command line psql here, and that would be my first go-to.
However, if for whatever reason you don't have access to the command line and are only able to connect to this database via pgadmin, there is another solution which you can find here:
Export and import table dump (.sql) using pgAdmin
I recommend looking at the solution by Tomas Greif.
I'm giving a try on PoWA, but I've got a little problem.
My Postgres database is running on AWS RDS.
PoWA needs HypoPG in order to suggest indexes.
But RDS doesn't support HypoPG extension. So I had to install PoWA at my backup database (outside RDS).
The problem is: PoWA isn't analyzing the restored database. It can't recognizes any data. If I execute some SQL queries manually it works though.
Is there something that I can be missing?
And, when I tried Ankane Dexter, I could show it the log files path (dumped at the backup database in parallel). Is there a way to do so in PoWA?
Thanks.
We have a Redshift cluster that needs one table from one of our RDS / postgres databases. I'm not quite sure the best way to export that data and bring it in, what the exact steps should be.
In piecing together various blogs and articles the consensus appears to be using pg_dump to copy the table to a csv file, then copying it to an S3 bucket, and from there use the Redshift COPY command to bring it in to a new table-- that's my high level understanding, but am not sure what the command line switches should be, or the actual details. Is anyone doing this currently and if so, is what I have above the 'recommended' way to do a one-off import into Redshift?
It appears that you want to:
Export from Amazon RDS PostgreSQL
Import into Amazon Redshift
From Exporting data from an RDS for PostgreSQL DB instance to Amazon S3 - Amazon Relational Database Service:
You can query data from an RDS for PostgreSQL DB instance and export it directly into files stored in an Amazon S3 bucket. To do this, you use the aws_s3 PostgreSQL extension that Amazon RDS provides.
This will save a CSV file into Amazon S3.
You can then use the Amazon Redshift COPY command to load this CSV file into an existing Redshift table.
You will need some way to orchestrate these operations, which would involve running a command against the RDS database, waiting for it to finish, then running a command in the Redshift database. This could be done via a Python script that connects to each database (eg via psycopg2) in turn and runs the command.