Скачать или смотреть How to Log Valid SQL Statements in Spring JPA without Parameters

Discover how to configure Spring JPA to log `valid SQL statements` with actual values instead of parameterized queries. Improve your debugging efficiency!
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This video is based on the question https://stackoverflow.com/q/70328451/ asked by the user 'Berlin Brown' ( https://stackoverflow.com/u/10522/ ) and on the answer https://stackoverflow.com/a/70328523/ provided by the user 'jeff pentagon' ( https://stackoverflow.com/u/16932810/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

When working with Spring JPA, you may find yourself facing a common challenge: how to log valid SQL statements without the need to manually replace parameters in prepared statements. This is particularly useful during debugging sessions where you want to quickly see the actual SQL statements being executed against your database.

In this guide, we will explore how to achieve logging of complete SQL statements by adjusting the necessary configurations in your Spring application. Our goal is to streamline your debugging process and enhance the visibility of your SQL interactions.

Understanding the Problem

By default, Spring JPA logs SQL statements using parameterized queries like this:

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While this format is useful for security and performance, it can make it cumbersome for developers and database administrators to read the executed SQL easily. Manually inserting parameter values to build the full query is tedious and prone to error.

Step-by-Step Solution

To obtain a log output that includes both the SQL structure and the actual parameter values, you need to configure your application's logging settings correctly. Here’s how you can do that:

1. Update Your Logging Configuration

Below are key logging settings you should add or modify in your application’s configuration file (usually application.properties or application.yml):

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Explanation of Key Components:

logging.level.org.hibernate.SQL: DEBUG: This setting ensures that Hibernate logs the SQL statements being executed.

logging.level.org.hibernate.type.descriptor.sql.BasicBinder: TRACE: This line is crucial as it displays the prepared statement parameters being bound, providing context around the data being inserted or updated.

2. Adjusting the JPA Log Levels

If you want more verbose logging while debugging, you can also set environment variables in your startup script. Here is how you can do that:

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This will increase the log level to trace, which gives you detailed insight into SQL operations and parameter bindings.

3. Testing Your Configuration

After modifying your logging settings, run your application and execute some queries. You should see logs like the following mixed with parameter values:

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Example Output:

Instead of a parameterized query, you will now see:

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This makes it visually easier to verify and debug SQL interactions.

Conclusion

By following these straightforward steps to adjust your logging settings in Spring JPA, you can seamlessly log valid SQL statements that include actual parameter values. This approach not only enhances clarity but also empowers developers to debug SQL interactions with confidence and efficiency.

Make sure to implement and test the configurations provided in this guide to fully utilize their benefits. Happy coding!