How to create a new database with the hstore extension already installed?
Long story short:
Install hstore in the template1 database:
psql -d template1 -c 'create extension hstore;'
Step-by-step explanation:
As stated by the PostgreSQL documentation:
CREATE EXTENSION loads a new extension into the current database.
Installing an extension is database-specific. The following returns you the current database name:
$ psql -c 'select current_database()' current_database ------------------ username(1 row)
In case you have a database named after your username. Now with dbtest
:
$ psql -d dbtest -c 'select current_database()' current_database ------------------ dbtest(1 row)
Ok, you got it. Now, to create new databases with hstore installed, you'll have to install it in the template1
database. According to the doc:
CREATE DATABASE actually works by copying an existing database. By default, it copies the standard system database named template1.
Let's do this:
$ psql -d template1 -c 'create extension hstore;'
And check that it works :
$ createdb dbtest$ psql -d dbtest -c '\dx' List of installed extensions Name | Version | Schema | Description ---------+---------+------------+-------------------------------------------------- hstore | 1.0 | public | data type for storing sets of (key, value) pairs plpgsql | 1.0 | pg_catalog | PL/pgSQL procedural language(2 rows)
Done!
Also remember, that hstore is in the Public schema, so if you use other schemas, you should use format public.hstore(record)