under bin/php/ are a lot of helper scripts which you can access via php cli.
flatten.php inline comment:
$script =& eZScript::instance( array( 'description' => ( "eZ publish database flattening.\n\n" .
"Will remove data that is not considered currently in use to minimize the amount of database data it consumes\n" .
"\n" .
"Possible values for NAME is:\n" .
"contentobject, contentclass, workflow, role or all (for all items)\n" .
"flatten.php -s admin contentobject"),
'use-session' => false,
'use-modules' => true,
'use-extensions' => true ) );
