You can download the plug-in either from Oracle Software Delivery Cloud (search for "Oracle Graph Server and Client") or from Oracle Graph Server and Client Downloads.

To install the PGQL plug-in for SQLcl, you need to unzip the downloaded plug-in into the lib/ext/pgql directory of your local SQLcl installation. Note that you need to create the pgql folder in lib/ext if it does not already exist.

To upgrade to a newer version of the PGQL plug-in, remove all the files from lib/ext/pgql and then unzip the files of the newer version of the plug-in into lib/ext/pgql.