How to display hibernate sql parameter values – P6Spy


There are many developers asking about Hibernate SQL parameter value question. How to display the Hibernate SQL parameter values that passed to database? Hibernate just display all parameter values as question mark (?). With show_sql property, Hibernate will shows all generated SQL statements, but not the SQL parameter values.

For example

Hibernate: insert into mkyong.stock_transaction (CHANGE, CLOSE, DATE, OPEN, STOCK_ID, VOLUME) 
values (?, ?, ?, ?, ?, ?)

Is there a way to log or display the exact Hibernate SQL parameter values?

Solution – P6Spy

Well, if there is a question there is an answer ~

The P6Spy is a useful library to log all SQL statement and parameter values before send it to database. The P6Spy is free, it’s use to intercepts and logs all your database SQL statements into a log file, and it works for any application that uses JDBC driver.

1. Download P6Spy library

Get the “p6spy-install.jar“, you can download it from

  1. P6Spy official website.
  2. P6Spy at

2. Extract it

Extract the p6spy-install.jar file, look for p6spy.jar and

3. Add library dependency

Add p6spy.jar into your project library dependency

4. Modify P6Spy properties file

Modify your database configuration file. You need to replace your existing JDBC driver with P6Spy JDBC driver – ” com.p6spy.engine.spy.P6SpyDriver

Original is MySQL JDBC driver – “com.mysql.jdbc.Driver”

  <property name="hibernate.bytecode.use_reflection_optimizer">false</property>
  <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
  <property name="hibernate.connection.password">password</property>
  <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/mkyong</property>
  <property name="hibernate.connection.username">root</property>
  <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
  <property name="show_sql">true</property>

Changed it to P6Spy JDBC driver – “com.p6spy.engine.spy.P6SpyDriver”

  <property name="hibernate.bytecode.use_reflection_optimizer">false</property>
  <property name="hibernate.connection.driver_class">com.p6spy.engine.spy.P6SpyDriver
  <property name="hibernate.connection.password">password</property>
  <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/mkyong</property>
  <property name="hibernate.connection.username">root</property>
  <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
  <property name="show_sql">true</property>

5. Modify P6Spy properties file

Modify the P6Spy properties file – “

Replace the “real driver” with your existing MySQL JDBC driver

#specifies another driver to use
#specifies a third driver to use

Change the Log file location
Change the log file location in logfile property, all SQL statements will log into this file.


logfile     = c:/spy.log


logfile     = /srv/log/spy.log

6. Copy “” to project classpath

Copy “” to your project root folder, make sure your project can locate “”, else it will prompt “” file not found exception.

7. Done

Run your application and do some database transaction, you will notice all the SQL statements sent from application to database will be logged into a file you specified in “”.

Sample log file as following.

insert into mkyong.stock_transaction (CHANGE, CLOSE, DATE, OPEN, STOCK_ID, VOLUME) 
values (?, ?, ?, ?, ?, ?)|
insert into mkyong.stock_transaction (CHANGE, CLOSE, DATE, OPEN, STOCK_ID, VOLUME) 
values (10.0, 1.1, '2009-12-30', 1.2, 11, 1000000)


Frankly, the P6Spy is really useful in reducing the developers’ debugging time. As long as your project is using JDBC driver for connection , P6Sqp can fir into it and log all SQL statements and parameter values for you.

For Maven User

You can use Maven to download the P6Spy dependency into your pom.xml


However the “” file is not come in package, you have to create it yourself. You can download the template here –


  1. P6Spy configuration
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  • Pablo Thiele

    How about logging using the p6spy on JUnit tests? I tried some ways and had no luck.

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  • Krishna

    We are using Oracle connection Pooling mechanism in our project as our application uses some oracle specific features.

    The configuration of our datasource in jetty.xml is as follows:

    &lt;Call name=&quot;addService&quot;&gt;
      &lt;New class=&quot;;&gt;
        &lt;Set name=&quot;Name&quot;&gt;DataSourceService&lt;/Set&gt;
        &lt;Call name=&quot;addDataSource&quot;&gt;
             &lt;New class=&quot;oracle.jdbc.pool.OracleConnectionPoolDataSource&quot;&gt;
                &lt;Set name=&quot;description&quot;&gt;xxxx&lt;/Set&gt;
                &lt;Set name=&quot;user&quot;&gt;xxx&lt;/Set&gt;
                &lt;Set name=&quot;password&quot;&gt;xxxx&lt;/Set&gt;
                &lt;Set name=&quot;loginTimeout&quot;&gt;xxx&lt;/Set&gt;
                &lt;Set name=&quot;URL&quot;&gt;jdbc:oracle:thin:@localhost:1521:xxx&lt;/Set&gt;
         &lt;Call name=&quot;start&quot;/&gt;

    Now How do we integrate this datasource with P6Spy, so that P6Spy can print out all the SQL statements on to the console…?

    I have previously used P6spy with other datasources like spring’s DriverManagerDataSource, other datasources like as

    (In Tomcat)

    Resource name="jdbc/test" auth="Container"
          type="javax.sql.DataSource" driverClassName="oracle.jdbc.driver.OracleDriver"
          username="xxx" password="xxx" maxActive="65" maxIdle="10"
          maxWait="-1" removeAbandoned="true"/> 


    All these datasources take driverClassName as argument where we can provide the “com.p6spyengine.spy.P6SpyDriver” in the place of “oracle.jdbc.driver.OracleDriver” and provide the real driver name in The all worked fine.

    But with oracle.jdbc.pool.OracleConnectionPoolDataSource, there is no such property called driverClassName to provide a proxy driver to.

    In this case how can i integrate P6Spy with it?

    Please help…

    Thanks in Advance,

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  • geeth

    Thankz mkyong. It is very helpful!

  • Anish

    Very nice and simple way to monitor native sql. Thanks for the time spend for sharing your knowledge with the world.

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  • Javier ROCA

    Hello there,

    Thanks for your article. It seems the requires other parameters to work properly in some environments (at least in my case Eclipse 3.5, Hibernate 3), in my case I needed to have Log4J as the main output. After reviewing the P6Spy doc I found this setup working fine:

    realdriver=com.mysql.jdbc.Driver # or your driver

    deregisterdrivers = true #needed in certain circumstances!!!
    autoflush = true
    appender=com.p6spy.engine.logging.appender.Log4jLogger # Log4J
    includecategories = info, statement # statement == SQL statements
    module.log=com.p6spy.engine.logging.P6LogFactory # required!!!

    In you can proceed as follows:




    • mkyong

      thanks for sharing your tips ~

      • Panda

        Nice findings. It help. Keep up blogging.

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