How to Access the Actual SQL Query Executed by a PreparedStatement in Java?

Accessing the SQL Query Executed by a PreparedStatement

Prepared statements are used for preventing SQL injection and improving query performance. However, logging their SQL queries during debugging may present a challenge as the logged statement contains placeholders (?) rather than actual values.

Unfortunately, obtaining the exact SQL query that will be executed by a PreparedStatement is not possible in Java without manually constructing it. Unlike regular statements, prepared statements undergo a preparation phase where the query is analyzed and stored in memory as a data structure. The execution happens against the bound variables provided separately.

For debugging purposes, you can opt for the following approaches:

• Log the placeholder query along with the bound variables, providing a clear understanding of the query template and the actual data used.
• Construct the SQL query manually by concatenating the placeholder query and the bound variables. While this approach requires more development effort, it gives you the exact SQL query that gets executed.

It's important to note that the lack of a direct way to access the PreparedStatement's SQL stems from the fact that it doesn't exist in a form that can be directly retrieved. Prepared statements optimize query execution by separating the parsing and preparation phase from the execution phase, and this separation prevents the availability of the executed query in real-time.

The above is the detailed content of How to Access the Actual SQL Query Executed by a PreparedStatement in Java?. For more information, please follow other related articles on the PHP Chinese website!