Table of Contents
How does Spring Boot work with Flyway dependency?
With the Flyway dependency on the classpath, Spring Boot will initialize everything for you. Once the first connection is established to the database, Flyway will create a flyway_schema_history table to track the already applied database scripts with their checksum.
Is there anything wrong with doing jdbctemplate this way?
Basically, the JdbcTemplate is created inside the Component class using the setter for datasource. Is there anything wrong with doing it this way instead so that there is exactly ONE instance of jdbcTemplate in the application?
Where can I find migration scripts in Flyway?
You also won’t get information about the current database schema version of an environment (e.g. staging, test, dev …). For your database scripts, you should rely only on Flyway and write versioned migration scripts within your codebase ( src/main/resources/db/migration is the default folder):
Is the logging code in JDBC good or bad?
Using either of these should be a matter of adding the jar to the project, changing your jdbc url to point to the wrapper, and tweaking the logging to get the level of information you want. The existing logging code is not good because it is repetitious cut-n-paste code, and it will result in exceptions being logged multiple times.
With the Flyway dependency on the classpath, Spring Boot will initialize everything for you. Once the first connection is established to the database, Flyway will create a flyway_schema_history table to track the already applied database scripts with their checksum.
You also won’t get information about the current database schema version of an environment (e.g. staging, test, dev …). For your database scripts, you should rely only on Flyway and write versioned migration scripts within your codebase ( src/main/resources/db/migration is the default folder):
What are the best practices for Flyway and hibernate?
You’ll fail fast and early during development and won’t get exceptions due to schema differences during runtime. With the help of the schema validation log, you’ll also be able to spot and fix the error fast. The normal Flyway version scripts e.g. V001__CREATE_USER.sql are applied once to the database and are locked due to their checksum.
How to create a repeatable migration in Flyway?
For these scenarios, Flyway offers the opportunity to create so-called Repeatable migrations (more information in the docs) which get executed whenever the checksum of the file changes. To create such migration scripts you need the prefix R like R__CREATE_PERSON_VIEW.sql: