The $mForUpdate flag no longer causes the FOR UPDATE option to be added.
This was at first only true for some values of $wgAntiLockFlags (since
r9248 /
ba8a00bcb833), though since
12757b50f8da (when the setting was
removed), is always the case.
The added text is based on the description for $wgAntiLockFlags.
Change-Id: I02a3e2df37ec40c7e36ae6210c8263f13d9e3e5b
}
/**
- * General accessor to get/set whether SELECT FOR UPDATE should be used
+ * General accessor to get/set whether the master DB should be used
+ *
+ * This used to also set the FOR UPDATE option (locking the rows read
+ * in order to avoid link table inconsistency), which was later removed
+ * for performance on wikis with a high edit rate.
*
* @param bool $update
* @return bool