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MDL-70285 completion upgrade: fix performance of the MDL-69687 code

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This commit is contained in:
Tim Hunt 2020-11-23 20:45:46 +00:00
parent 87bcff8c6e
commit 86669b0564
1 changed files with 6 additions and 5 deletions
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11
lib/db/upgrade.php
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@ -2592,11 +2592,12 @@ function xmldb_main_upgrade($oldversion) {
if ($oldversion < 2020061502.09) {
// Delete orphaned course_modules_completion rows; these were not deleted properly
// by remove_course_contents function.
$DB->delete_records_subquery('course_modules_completion', 'id', 'id',
"SELECT cmc.id
FROM {course_modules_completion} cmc
LEFT JOIN {course_modules} cm ON cm.id = cmc.coursemoduleid
WHERE cm.id IS NULL");
$DB->delete_records_select('course_modules_completion', "
NOT EXISTS (
SELECT 1
FROM {course_modules} cm
WHERE cm.id = {course_modules_completion}.coursemoduleid
)");
upgrade_main_savepoint(true, 2020061502.09);
}