The Derby dblook utility is a Data Definition Language (DDL) generation utility.
The dblook utility is a simple utility that dumps all or parts of the DDL of a user-specified database to either a console or a file. The generated DDL can then be used for such things as recreating all or parts of a database, viewing a subset of the objects in a database (for example, those objects that pertain to specific tables and schemas), or documenting the schema of a database.
Choose the method that you can use to run the dblook script:
| Method | When to Use | Command |
|---|---|---|
| Run dblook as a standalone command. | Use this method if you are relatively new to the Java programming language and new to Derby. | You must set
your environment variables before you can run the dblook utility
using this method. To run the dblook script from the command line use: dblook -d databaseURL [options] The dblook script sets the appropriate environment variables, including the CLASSPATH, and runs the dblook utility. |
| Run dblook using the jar file that is located in the directory where dblook resides. | Use this method if you are new to Derby, but are familiar with the Java programming language. | You must set the DERBY_HOME environment
variable before you can run the dblook utility using this
method. On UNIX, the command is: java [options] -jar $DERBY_HOME/lib/derbyrun.jar dblook -d databaseURL [options] On Windows, the command is: java [options] -jar %DERBY_HOME%\lib\derbyrun.jar dblook -d databaseURL [options] |
| Run dblook using the java command. | Use this method if you are familiar with both the Java programming language and Derby, and you have already set the java.exe file in your command execution PATH. | You must set your CLASSPATH. Use the steps specified in Manually setting the CLASSPATH environment variable.
Then specify the class name in the java command. For example:java org.apache.derby.tools.dblook -d databaseURL [options] |