Can Hibernate Log SQL Queries with Actual Parameter Values Instead of Placeholders?

Printing Query Strings with Parameter Values in Hibernate

When working with Hibernate, it can be useful to print generated SQL queries to facilitate debugging or performance analysis. By default, these queries are logged with question marks (?) placeholders for parameter values, which can make it challenging to understand the actual data being passed.

Can Hibernate Print SQL Queries with Real Values?

The short answer is no, Hibernate does not directly provide a way to log SQL queries with real parameter values. However, there are several methods for achieving this functionality.

Enabling Logging for JDBC Parameters

One approach is to enable logging for the following categories:

• org.hibernate.SQL: Set to debug to log all SQL DML statements.
• org.hibernate.type: Set to trace to log all JDBC parameters.

A sample log4j configuration for this purpose:

log4j.logger.org.hibernate.SQL=debug
log4j.logger.org.hibernate.type=trace

The org.hibernate.SQL logger is equivalent to the legacy hibernate.show_sql=true property and logs all SQL statements. The org.hibernate.type logger, when set to trace, provides detailed information about JDBC parameters, including their bound values.

Using a JDBC Proxy Driver

Another solution is to utilize a JDBC proxy driver, such as P6Spy. This tool intercepts JDBC calls and provides real-time logging of SQL statements, including bound parameter values. P6Spy can be configured through a configuration file or using environment variables.

By employing one of these methods, it becomes possible to print SQL queries with actual parameter values, enhancing the debugging and analysis process when working with Hibernate.

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