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jOOQ Masterclass

jOOQ Masterclass

By : Anghel Leonard
4.6 (5)
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jOOQ Masterclass

jOOQ Masterclass

4.6 (5)
By: Anghel Leonard

Overview of this book

jOOQ is an excellent query builder framework that allows you to emulate database-specific SQL statements using a fluent, intuitive, and flexible DSL API. jOOQ is fully capable of handling the most complex SQL in more than 30 different database dialects. jOOQ Masterclass covers jOOQ from beginner to expert level using examples (for MySQL, PostgreSQL, SQL Server, and Oracle) that show you how jOOQ is a mature and complete solution for implementing the persistence layer. You’ll learn how to use jOOQ in Spring Boot apps as a replacement for SpringTemplate and Spring Data JPA. Next, you’ll unleash jOOQ type-safe queries and CRUD operations via jOOQ’s records, converters, bindings, types, mappers, multi-tenancy, logging, and testing. Later, the book shows you how to use jOOQ to exploit powerful SQL features such as UDTs, embeddable types, embedded keys, and more. As you progress, you’ll cover trending topics such as identifiers, batching, lazy loading, pagination, and HTTP long conversations. For implementation purposes, the jOOQ examples explained in this book are written in the Spring Boot context for Maven/Gradle against MySQL, Postgres, SQL Server, and Oracle. By the end of this book, you’ll be a jOOQ power user capable of integrating jOOQ in the most modern and sophisticated apps including enterprise apps, microservices, and so on.
Table of Contents (26 chapters)
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1
Part 1: jOOQ as a Query Builder, SQL Executor, and Code Generator
4
Part 2: jOOQ and Queries
11
Part 3: jOOQ and More Queries
16
Part 4: jOOQ and Advanced SQL
22
Part 5: Fine-tuning jOOQ, Logging, and Testing

Writing dynamic queries

Commonly, a dynamic query contains no or some fixed parts and some other parts that can be appended at runtime to form a query that corresponds to a certain scenario or use case.

Important Note

In jOOQ, even when they look like static queries (due to jOOQ's API design), every SQL is dynamic; therefore, it can be broken up into query parts that can be fluently glued back in any valid jOOQ query. We already have covered this aspect in Chapter 3, jOOQ Core Concepts, in the Understanding the jOOQ fluent API section.

Dynamically creating an SQL statement on the fly is one of the favorite topics of jOOQ, so let's try to cover some approaches that can be useful in real applications.

Using the ternary operator

The Java ternary operator (?) is probably the simplest approach for shaping a query at runtime. Check out this sample:

public List<ProductRecord> fetchCarsOrNoCars(
       float buyPrice, boolean...
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