![]() ![]() I downloaded PostgreSQL 13 with pg Admin 4 and when I open it for the first time after installation it asks me for the master password that I was asked to set during installation, after I give the master password and this gets accepted I try to connect to the default server created during the installation: "PostgreSQL 13".Īt this point, it asks me for a password for the user "postgres" that I don't know where to find. Remember that extensions might be written in a language which itself is not-trusted – hence the need.I know that this question has been asked other times but I didn't find a solution to this problem! In fact, a trusted extension is the installation or update script is run as the bootstrap superuser, not as the calling user. ![]() Conclusionīehind the scenes, the behaviour is controlled by two parameters in the extension control file:Īn extension can be created by a non-superuser only if both are true. In nutshell, superusers can relinquish control over such trusted extensions and any user with the CREATE permissions on a database can enable trusted extensions without approaching his database administrator. In fact, there are 24 trusted and 24 not so trusted extensions coming with postgreSQL13. $ grep -l trusted ntrol file_fdw.control Where is that marked? It’s in the control file of the extensions. ![]() The difference is coming from the fact that while hstore is marked as trusted, file_fdw is NOT marked as trusted. Superuser can allow same privileges on postgres db by executing the following command: postgres=# GRANT CREATE ON DATABASE postgres FOR johnsmith īut there is more to trusted extension than this, let’s try to create another extension: jsDB=> create extension file_fdw ĮRROR: permission denied to create extension "file_fdw" Our second set of commands should take care of that: $ psql -U postgres But still there is a subtle difference – the HINT which suggests that CREATE privilege is missing. johnsmith still can’t create the extension. HINT: Must have CREATE privilege on current database to create this extension. Let’s check the behaviour with PostgreSQL13 for the same commands which we did for PostgreSQL12. Here Comes PostgreSQL 13Įxpect a different behaviour with the concept of trusted extensions (at-least for contrib modules or pre-packaged extensions). I’m gonna try “trusted extensions” with Beta2 binaries. ![]() At the time of writing this blog – PostgreSQL version 13 is in Beta2 stage and the team is already writing a release announcement. Even though johnsmith is the owner of jsDB, he still can not install relevant, simple extensions to his database.īut that’s all in PostgreSQL server 12 (and below) it is going to change with PostgreSQL version 13. You are now connected to database "jsDB" as user "johnsmith".Īhh! It doesn’t make any difference. Postgres=# ALTER ROLE johnsmith CREATEDB In the following snippet, postgres superuser is allowing johnsmith to create altogether new database of his own to play around: $ psql -U postgres What if the database was owned or created by johnsmith – we can try that too. Even though extensions like hstore don’t have any security concern in context of its usage, it’s still only super users who can create this extension on the database. The error clearly indicates that the extension can only be created by super user i.e. HINT: Must be superuser to create this extension. psql -U johnsmith -d wooliesdbĮRROR: permission denied to create extension "hstore" John Smith would like to add the postgres extension hstore to wooliedb, since his application code is relying on that. Consider a hosted PostgreSQL Instance containing two roles: Let’s take a look at what was there before PostgreSQL 13 and why it was a real pain. TimescaleDB is one such extension where it is kind of changing the persona of PostgreSQL Server to make it more suitable for IOT workload. In fact, there are many third party organisations who have used extensions mechanism to generate amazing feature sets. In other words, extensions enhance functional capabilities to PostgreSQL Server in a non-intrusive way. We know that PostgreSQL has extension power to add feathers to its cap without disturbing much of its core. PostgreSQL 13 introduces the concept of a “trusted extension”, which allows for a superuser to specify extensions that a user can install in their database so long as they have a CREATE privilege. While looking at PostgreSQL 13, I observed an entry which caught my attention: Needless to say that there are multitude of such features in the mentioned release which will soon enhance experience for DBA and application developers alike. In my previous blog, we explored new capabilities of Logical replication with Partition tables in PostgreSQL 13. ![]()
0 Comments
Leave a Reply. |