I have a SELECT query and I want to execute the result of this query as well. I think I need a variable to save it first and then execute. Some other answers to such question included commands from system bash, but I have a postgres running on my docker and I already entered my database in postgres. So how the command may look like?
Related
I am trying to run the following query in pgAdmin:
CREATE DATABASE abc;
CREATE DATABASE xyz;
And I get the following error:
ERROR: current transaction is aborted, commands ignored until end of transaction block
SQL state: 25P02
I'm relatively new to postgres.
With SQL Server it's possible to create multiple databases in a single query with the "GO" statement in between if necessary.
I've tried to google this error, and most answers are to simply run each line separately.
That would work, but I'm curious why this doesn't work.
It may also be a setting in pgAdmin.
The "autocommit" is currently on. I've tried it off, and same result.
I'm using postgres 14.5 (in aws)
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'd need to initialize postgres instance to Docker container from dump SQL-file. Otherwise it works fine but the problem is I cannot set database to be something else than "postgres". Creating new database works fine but schema clauses eg. CREATE TABLE end up going nowhere.
I tried to set default database with --env option in docker run command but it returns error --env requires a value.
Is there any way to set default database? Hopefully in SQL-clause.
Apparently you need to use /connect "dbname=[database name]" before schema clauses in order to point script towards correct dabase.
This wasn't (quite understandbly) included into the script when dump was generated only for a single database instead of the whole cluster.
I have a relatively large data table (~4m rows) that has been imported to a locally hosted postgresql database. (As it happens it's a ruby on rails app database, but that shouldn't be important for the purposes of the question - unless it helps)
I want to take that table and add it into an identical table in a heroku postgresql database (the table is currently empty).
How would I do that quickly and efficiently?
I found this Copy a table from one database to another in Postgres
but I'm struggling with the syntax for the heroku end, i.e. how do I connect to both at the same time? Which database am I connecting to originally?
In that answer, you are originally connected to the database "source_db" or "my_db" (depending on which line in the answer you are looking at). Presumably that database is on the instance running locally on port 5432, unless unshown environment variables (or non-default compilation) have changed that. And the destination database is named "target_db", running in the same instance.
The pg_dump and psql are independent commands and each takes all the connection options that they would take if run in isolation. So you would probably want something like:
pg_dump -t table_to_copy source_db | psql target_db -h you.heroku.hostname_or_ip
A problem could be if both commands prompt for a password, it might make a mess. Which password do you need to enter first? And whichever order, will they read them correctly? If both need passwords, it is best to arrange that at least one of them be supplied by ~/.pgpass.
Is there any way how to get all database names out of a postgres database using JDBC? I can get the current one, but thats not what I am looking for...
I have a jUnit rule, which creates database for each test and after the test it drops it, but in some special cases, when the JVM dies, the drop never happens. So I'd like to check in the rule also existing database and clean some, which are not used any more. What I am looking for is some \l metacommand (but I can't easily ssh to the machine from unit tests...)
What would be also a solution for me would be some database ttl, something like some amqp queues have, but I suppose thats not in postgres either...
Thanks
Just run:
select datname
from pg_database
through JDBC. It returns all databases on the server you are connected to.
If you know how to get the information you want through a psql meta command (e.g. \l) just run psql with the -E switch - all internal SQL queries for the meta commands are then printed to the console.
-l actually uses a query that is a bit more complicated, but to only the the names, the above is sufficient