Parent: HintsAndTips


DERBY-1447 is a request for enhancement of Derby's IJ tool, adding a command line history.

Until this feature is implemented in IJ, users on some platforms/shells need to employ workarounds in order to enjoy IJ with a command history and other convenient command editing capabilities. This page is intended to describe such workarounds.

With a full Derby installation/build, you can start IJ by running for example the following command on the command line:

java -jar lib/derbyrun.jar ij

Microsoft Windows command windows (cdm.exe and friends) seem to provide native command history and editing features automatically when running ij from the command line.

On Unix/Linux systems, workarounds are usually needed.


Using jEdit

Relatively new versions of jEdit support the Console plugin, which allows you to run shell command in jEdit's environment. This plugin provides a command history and other features when running IJ from the console.

  1. Download, install and start a recent version of jEdit.

  2. On the jEdit menu, go to Plugins --> Plugin Manager.

  3. Select the Install tab.

  4. Select the Console plugin and Install

  5. Restart jEdit if necessary
  6. Start the console via Plugins --> Console --> Console

  7. Start IJ as you would do in a regular terminal window.

You can select previous and next commands using up and down arrows. To move within a command, use (for instance) side arrows.

Using JLine

You can script starting IJ with JLine like this:

java -classpath jline.jar:${IJ_CLASSPATH} ${IJ_OPTIONS} jline.ConsoleRunner [$@]

Use an alias or a script to ease the startup. Depending on how you do it in your shell, the $@ might not be required to be able to pass arguments to IJ. Modify IJ_CLASSPATH to specify which Derby version / code base to use. If you want to start IJ with certain options, add them to IJ_OPTIONS (these have to be Java properties, for instance -Dij.exceptionTrace=true).

Note that JLine has problems dealing with commands longer than one line in your terminal.

Using Emacs

ij works pretty well in shell-mode and comint-mode, but the best is a custom-designed SQLi-mode. Then you may utilize the sql-send-commands in SQL-mode. I once implemented such a file, feel free to use it, and you find it here: ij.el.

You may wish to define sql-derby-home and sql-ij-classpath in your .emacs file, e.g. like this:

(defvar sql-ij-classpath "/usr/local/share/java/derby/lib/derbytools.jar:/usr/local/share/java/derby/lib/derby.jar:/usr/local/share/java/derby/lib/derbyclient.jar")
(defvar sql-derby-home "/var/tmp/myderbyhome")
(load-file "ij.el")

CommandHistoryInIj (last edited 2009-12-03 21:58:55 by BerntJohnsen)