Unlock the Power of SQLDelight: A Comprehensive Guide to Typesafe Kotlin APIs
What Sets SQLDelight Apart?
When it comes to generating typesafe Kotlin APIs from SQL statements, SQLDelight stands out from the crowd. With its robust schema verification, statements, and compile-time migrations, SQLDelight offers a seamless experience for developers. But what makes it different from other libraries like Room? The answer lies in its cross-platform support, allowing you to switch between MySQL, Postgres, and HSQL/H2 databases with ease. Additionally, SQLDelight provides syntax highlighting, autocompletion, migration testing, and exporting, making it a versatile tool for developers.
Getting Started with SQLDelight
To begin, create a new project in IntelliJ and select Kotlin. Add the necessary dependencies to your Console Application. For this tutorial, we’ll focus on setting up a MySQL database.
Setting Up Your MySQL Database
Download and install MySQL for your device, and then install a visual tool like TablePlus or Workbench to connect your database. Create a database named “movies_db” and import a sample dataset to use for this tutorial.
Connecting SQLDelight to Your MySQL Database
To connect SQLDelight to your MySQL database, you’ll need an instance of a DataSource, which can be obtained from a connection manager like HikariCP. Create a function to get the DataSource in your Main.kt file. Then, create a Movie.sq file in the src/sqldelight directory and add a SELECT statement.
CRUD Operations with SQLDelight
SQLDelight makes it easy to perform CRUD operations. Insert data using either a function with each value or by passing the whole movie object. Update existing fields in your database with a simple Update query. Delete data with a Delete query, and Select data with named and variable arguments.
Transactions and Atomic Rollbacks
SQLDelight also allows you to execute multiple statements under one transaction using the transaction function. This is particularly useful when you need to combine multiple queries to avoid memory overhead. You can also roll back transactions based on runtime conditions and receive callbacks for transaction completion or rollbacks.
Unlocking Advanced Features
With SQLDelight, you can dive into advanced operations like migrations, fast text search, and custom adapters. Explore the complete working application on GitHub and take your database operations to the next level.
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