}
-/**
- * Returns SQL to be used as a subselect to find the primary role of users.
- * Geoff Cant <geoff@catalyst.net.nz> (the author) is very keen for this to
- * be implemented as a view in future versions.
- *
- * eg if this function returns a string called $primaryroles, then you could:
- * $sql = 'SELECT COUNT(DISTINCT prs.userid) FROM ('.$primary_roles.') prs
- * WHERE prs.primary_roleid='.$role->id.' AND prs.courseid='.$course->id.
- * ' AND prs.contextlevel = '.CONTEXT_COURSE;
- *
- * @return string the piece of SQL code to be used in your FROM( ) statement.
- */
-function sql_primary_role_subselect() {
- global $CFG;
- return 'SELECT ra.userid,
- ra.roleid AS primary_roleid,
- ra.contextid,
- r.sortorder,
- r.name,
- r.description,
- r.shortname,
- c.instanceid AS courseid,
- c.contextlevel
- FROM '.$CFG->prefix.'role_assignments ra
- INNER JOIN '.$CFG->prefix.'role r ON ra.roleid = r.id
- INNER JOIN '.$CFG->prefix.'context c ON ra.contextid = c.id
- WHERE NOT EXISTS (
- SELECT 1
- FROM '.$CFG->prefix.'role_assignments i_ra
- INNER JOIN '.$CFG->prefix.'role i_r ON i_ra.roleid = i_r.id
- WHERE ra.userid = i_ra.userid AND
- ra.contextid = i_ra.contextid AND
- i_r.sortorder < r.sortorder
- ) ';
-}
-
/**
* Can include a given document file (depends on second
* parameter) or just return info about it.