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MDL-34156 Remove subselect from slow query

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This commit is contained in:
Michael Aherne 2012-07-03 12:05:05 +01:00
parent e537a588d8
commit 26a06fa7b6
1 changed files with 3 additions and 4 deletions
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7
enrol/meta/locallib.php
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@ -477,11 +477,10 @@ function enrol_meta_sync($courseid = NULL, $verbose = false) {
$sql = "SELECT ue.*
FROM {user_enrolments} ue
JOIN {enrol} e ON (e.id = ue.enrolid AND e.enrol = 'meta' $onecourse)
LEFT JOIN (SELECT xpue.userid, xpe.courseid
FROM {user_enrolments} xpue
LEFT JOIN ({user_enrolments} xpue
JOIN {enrol} xpe ON (xpe.id = xpue.enrolid AND xpe.enrol <> 'meta' AND xpe.enrol $enabled)
) pue ON (pue.courseid = e.customint1 AND pue.userid = ue.userid)
WHERE pue.userid IS NULL";
) ON (xpe.courseid = e.customint1 AND xpue.userid = ue.userid)
WHERE xpue.userid IS NULL";
$rs = $DB->get_recordset_sql($sql, $params);
foreach($rs as $ue) {
if (!isset($instances[$ue->enrolid])) {