A tag invalidation rewritten as the increment it means, or undefined when the shape is not one.
Drupal's merge picks INSERT or UPDATE from the lane's own cachetags, so its branch can collide
with the primary's row; both branches add one invalidation.
A tag invalidation rewritten as the increment it means, or undefined when the shape is not one.
Drupal's merge picks INSERT or UPDATE from the lane's own
cachetags, so its branch can collide with the primary's row; both branches add one invalidation.