For information about the nodes that can appear in representations
of access plans for the SQL statements that run on DB2® for Linux, UNIX, and Windows, follow this link to the DB2 for Linux, UNIX,
and Windows information center.
https://pic.dhe.ibm.com/infocenter/db2luw/v10r5/topic/com.ibm.db2.luw.admin.explain.doc/doc/r0052023.html