MDL-69848 upgrade: Delete notifications in chunks
[moodle.git] / message / output / popup / db / upgrade.php
index 9152c48..69daf6f 100644 (file)
@@ -46,7 +46,22 @@ function xmldb_message_popup_upgrade($oldversion) {
 
     if ($oldversion < 2020020600) {
         // Clean up orphaned popup notification records.
-        $DB->delete_records_select('message_popup_notifications', 'notificationid NOT IN (SELECT id FROM {notifications})');
+        $fromsql = "FROM {message_popup_notifications} mpn
+               LEFT JOIN {notifications} n
+                      ON mpn.notificationid = n.id
+                   WHERE n.id IS NULL";
+        $total = $DB->count_records_sql("SELECT COUNT(mpn.id) " . $fromsql);
+        $i = 0;
+        $pbar = new progress_bar('deletepopupnotification', 500, true);
+        do {
+            if ($popupnotifications = $DB->get_records_sql("SELECT mpn.id " . $fromsql, null, 0, 1000)) {
+                list($insql, $inparams) = $DB->get_in_or_equal(array_keys($popupnotifications));
+                $DB->delete_records_select('message_popup_notifications', "id $insql", $inparams);
+                // Update progress.
+                $i += count($inparams);
+                $pbar->update($i, $total, "Cleaning up orphaned popup notification records - $i/$total.");
+            }
+        } while ($popupnotifications);
 
         // Reportbuilder savepoint reached.
         upgrade_plugin_savepoint(true, 2020020600, 'message', 'popup');