Скачать или смотреть Resolving the QueryException: Ordinal parameters did not start with base 1 Error in Spring Data JPA

Learn how to resolve the common `QueryException` related to ordinal parameters in Spring Data JPA by switching to named parameters and adjusting your queries.
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Troubleshooting the QueryException in Spring Data JPA

If you are working with Spring Data JPA and database queries, encountering errors can be frustrating. One common error that developers face is the QueryException: Ordinal parameters did not start with base 1. This guide will address this issue, particularly when using native queries, and provide a clear solution to overcome it.

Understanding the Problem

In the context of SQL queries within Spring Data JPA, ordinal parameters start counting from 1. However, if you accidentally try to use them incorrectly or mix them up, you'll come across the error message: Ordinal parameters did not start with base 1 : 2. This error usually points out that the parameter you’re trying to use does not follow the expected order, which can occur especially in complex queries.

Example Scenario

Repository Code Snippet

Here is a simple example of a repository method that demonstrates the issue with parameter usage:

[[See Video to Reveal this Text or Code Snippet]]

In this code, you can see ordinal placeholders ?1 and ?2 being used, which can lead to confusion. When calling the method from the service, while passing parameters might not align correctly, triggering the QueryException.

Service Code Snippet

[[See Video to Reveal this Text or Code Snippet]]

The Solution

To resolve this error effectively, it’s recommended to switch from ordinal parameters to named parameters. Named parameters provide better readability and avoid common pitfalls associated with ordered parameters.

Step 1: Modify the Query

Update your query method to use named parameters like so:

[[See Video to Reveal this Text or Code Snippet]]

Key Changes:

Changed ?1 to :s and ?2 to :-{-ms?.name()}.

Used CONCAT instead of simple quotes around the search parameters for proper syntax.

Step 2: Update the Service Method Call

Make sure that the service method is calling this updated repository method without issues. Here's a reminder of how it would look:

[[See Video to Reveal this Text or Code Snippet]]

Why Named Parameters Help

Readability: Named parameters help clarify what each parameter represents, making the code easier to understand.

Flexibility: You can change the order of parameters without the risk of misalignment, which is especially useful in queries with optional parameters.

Fewer Errors: Reduces the likelihood of errors like the one discussed, making development smoother overall.

Conclusion

By switching to named parameters and adjusting the SQL query accordingly, you can eliminate the QueryException regarding ordinal parameters. This not only resolves the immediate issue but also improves your code's maintainability. Switching to named parameters is a best practice in Spring Data JPA that can save time and reduce errors down the road.

If you have encountered similar issues or have tips of your own for handling Spring Data JPA errors, feel free to share in the comments below! Happy coding!