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jOOQ Masterclass

You're reading from   jOOQ Masterclass A practical guide for Java developers to write SQL queries for complex database interactions

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Product type Paperback
Published in Aug 2022
Publisher Packt
ISBN-13 9781800566897
Length 764 pages
Edition 1st Edition
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Author (1):
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Anghel Leonard Anghel Leonard
Author Profile Icon Anghel Leonard
Anghel Leonard
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Toc

Table of Contents (26) Chapters Close

Preface 1. Part 1: jOOQ as a Query Builder, SQL Executor, and Code Generator
2. Chapter 1: Starting jOOQ and Spring Boot FREE CHAPTER 3. Chapter 2: Customizing the jOOQ Level of Involvement 4. Part 2: jOOQ and Queries
5. Chapter 3: jOOQ Core Concepts 6. Chapter 4: Building a DAO Layer (Evolving the Generated DAO Layer) 7. Chapter 5: Tackling Different Kinds of SELECT, INSERT, UPDATE, DELETE, and MERGE 8. Chapter 6: Tackling Different Kinds of JOINs 9. Chapter 7: Types, Converters, and Bindings 10. Chapter 8: Fetching and Mapping 11. Part 3: jOOQ and More Queries
12. Chapter 9: CRUD, Transactions, and Locking 13. Chapter 10: Exporting, Batching, Bulking, and Loading 14. Chapter 11: jOOQ Keys 15. Chapter 12: Pagination and Dynamic Queries 16. Part 4: jOOQ and Advanced SQL
17. Chapter 13: Exploiting SQL Functions 18. Chapter 14: Derived Tables, CTEs, and Views 19. Chapter 15: Calling and Creating Stored Functions and Procedures 20. Chapter 16: Tackling Aliases and SQL Templating 21. Chapter 17: Multitenancy in jOOQ 22. Part 5: Fine-tuning jOOQ, Logging, and Testing
23. Chapter 18: jOOQ SPI (Providers and Listeners) 24. Chapter 19: Logging and Testing 25. Other Books You May Enjoy

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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