![]() ![]() The PowerShell script that generates it will also need to be saved in the user area until we can progress to use a credential more safely. To run these initial migrations, your project directory must remain in your user area because we are going to get started by storing the password in a Flyway Config file within the project folder. The easiest way to get started is to clone the PubsAndFlyway project which contains the PubsPostgreSQL directory that I’ve provided, with the Scripts folder shown above. V1.1.4 alters the schema to allow it to take a reasonable amount of data, and V1.1.5 inserts the larger quantity of data. V1.1.1 does the initial build of the Pubs database, V1.1.2 inserts the original Pubs data and then V1.1.3 does some fixes, including updates to some of the datatypes. I’ll add to them over time, but here I’ll only cover the first five. I’ve provided some sample migration scripts for the Pubs database here. To test things out, we’ll use Flyway to run a few migrations. Running Flyway migrations on PostegreSQL databases Once the install is done, open pgAdmin4 (or use psql) to create an empty copy of the Pubs database, and then create a user who ‘owns’ the database. This is so that even the greybeard SQL Server developers who trained on the Pubs database can cut some PostgreSQL queries quickly, to try it out. For test purposes, the following line, will allow authenticated access on all incoming connections:Īlthough it isn’t required, it is useful to have pgAdmin4, the PostgreSQL-equivalent to SSMS, which is both cute and useful.įor the examples, I’ve converted the hoary old Pubs database, originally created for Sybase, for use on PostgreSQL. You may also need to edit the following line in your nf file to allow authenticated access from clients. The only thing that could cause difficulties here is ensuring that the port you select (5432 by default) is set in the firewall to let the traffic through. Flyway comes with its own set of JDBC drivers to access it. It is probably also easier to use a containerized install.īefore doing a Windows Server install, set up a dedicated local Windows admin account to run the postgresql service, with all the necessary permissions. It would have been easier on a laptop, but then the rest of your team can try out a server-based install. Setting up PostgreSQLįor this demo, I installed PostgreSQL on a Windows Server. In another article, we’ll try MariaDB as an illustration of a database system that can’t do this. The full list is DB2, PostgreSQL, Derby, EnterpriseDB and SQL Server. Also, it is one of the few database systems where a migration can be wrapped into a transaction, so that the migration can be rolled back. I’ve chosen PostgreSQL, because I’m already somewhat familiar with it, and it is easy to obtain and install. This article is aimed at SQL Server developers need to start understanding how Flyway works and performs with a different relational database system, in this case PostgreSQL. You’re likely to appreciate the value of a wider range of Flyway features. To familiarize yourself with Flyway, it pays to try it out with a few database products that are outside your comfort zone. ![]() ![]() It deals with a lot of the chores and checks and, by using Flyway, it ensures that these checks get done, and so you’re more likely to do successful builds. However, it really comes into its own if you are developing an application with two or more different types of databases, such as PostgreSQL, CockroachDB, SQL Server, Oracle, MySQL, SQLite or Informix. Using Flyway makes sense even if you use only one database system, such as SQL Server, and works well if you prefer a migrations-first approach and especially for smaller databases that aren’t being worked on simultaneously by a team of developers. He is a regular contributor to Simple Talk and SQLServerCentral.įlyway’s value is most easily appreciated when you are working with different database systems in a single application development. Phil Factor (real name withheld to protect the guilty), aka Database Mole, has 30 years of experience with database-intensive applications.ĭespite having once been shouted at by a furious Bill Gates at an exhibition in the early 1980s, he has remained resolutely anonymous throughout his career. ![]()
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