public static function get_by_user_and_competency($userid, $competencyid) {
        global $DB;

        $sql = 'SELECT p.*
                  FROM {' . self::TABLE . '} p
             LEFT JOIN {' . plan_competency::TABLE . '} pc
                    ON pc.planid = p.id
                   AND pc.competencyid = :competencyid1
             LEFT JOIN {' . user_competency_plan::TABLE . '} ucp
                    ON ucp.planid = p.id
                   AND ucp.competencyid = :competencyid2
             LEFT JOIN {' . template_competency::TABLE . '} tc
                    ON tc.templateid = p.templateid
                   AND tc.competencyid = :competencyid3
                 WHERE p.userid = :userid
                   AND (pc.id IS NOT NULL
                    OR ucp.id IS NOT NULL
                    OR tc.id IS NOT NULL)
              ORDER BY p.id ASC';

        $params = array(
            'competencyid1' => $competencyid,
            'competencyid2' => $competencyid,
            'competencyid3' => $competencyid,
            'userid' => $userid
        );

        $plans = array();
        $records = $DB->get_records_sql($sql, $params);
        foreach ($records as $record) {
            $plans[$record->id] = new plan(0, $record);
        }

        return $plans;
    }