For example, to load support for arrays, you would do: DB. In general, you load these extensions via Database#extension. However, Sequel ships with support for many PostgreSQL-specific types via extensions. Sequel’s default support on PostgreSQL only includes common database types. PostgreSQL-specific Database Type Support ¶ ↑ not available when using the postgres-pr driver). postgres/pg only will denote support specific to the postgres adapter when pg is used as the underlying driver (i.e. not available when connecting to PostgreSQL via the jdbc adapter). Postgres only will denote support specific to the postgres adapter (i.e. Some of this this support depends on the specific adapter or underlying driver in use. There are additional rarely used PostgreSQL features that Sequel supports which are not mentioned here. Note that while this guide is extensive, it is not exhaustive. This support is roughly broken into the following areas: However, Sequel’s database adapters extend the core support to include support for database-specific features.īy far the most extensive database-specific support in Sequel is for PostgreSQL. Sequel’s core database and dataset functions are designed to support the features shared by most common SQL database implementations. That’s it! I hope that helps someone else - it’ll certainly help me when I need to do another import of a sqlite3 database to postgres in the future.PostgreSQL-specific Support in Sequel ¶ ↑ Psql -h localhost -U dbuser -d yourdatabasename # log in from your shell to make sure it worked GRANT ALL PRIVILEGES ON DATABASE "yourdatabasename" to dbuser ĪLTER DATABASE fotoportal owner to fportal # Ctrl-d to exit your database shell Psql # enter your database shell # run these SQL statements in your database shellĬREATE USER dbuser WITH PASSWORD 'thisisyourpassword' # create the actual database you'll be importing your sqlite3 database into Su - postgres # (the user is called pgsql on FreeBSD) I’ve referenced setting up a Postgres user several times here’s a quick cheatsheet on how to do this. Once you create your postgres (destination) database with createdb yourdatabasename, importing from a sqlite3 database file is as simple as running: sequel -C sqlite:///path/to/live/db/yourdatabasename.db postgres://localhost/yourdatabasename Then, just do a gem install sequel pg sqlite3 However, these instructions should work with both Linux and FreeBSD (they’re a tiny bit vague because package names will be different between different operating systems).īasically, you’ll need ruby and rubygems installed, along with postgres, the postgres-dev libraries for your postgres version, and the sqlite3-dev libraries on your OS. In this case, I was flabbergasted when I experienced how much easier it is to work with Ruby on FreeBSD (the target system) than Debian Linux (the server we were migrating the database away from). If you’ve got Ruby installed, or are comfortable setting up a Ruby environment, I suggest going that route. PGloader seems like a good tool, but I ended up using a ruby tool called sequel. There are plenty of tools out there to help you. If you’ve got a lot of tables and columns with many different datatypes, it’s easier to use a third-party migration tool Import the dump file into Postgres ( psql -dyourdatabasename -U username -W
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