Revert "Use computed column because it's there" because it's not.
Revert "Use computed column because it's there" because it's not.

This reverts commit 70a2ee04b3d06179fe1dafba9dbc33ff274756f9.

froderik/closure_tree,froderik/closure_tree,pgericson/closure_tree,mceachen/closure_tree,fabien-michel/closure_tree,mceachen/closure_tree,pgericson/closure_tree,seuros/closure_tree,fabien-michel/closure_tree,mceachen/closure_tree,pgericson/closure_tree,fabien-michel/closure_tree,hendricius/closure_tree,hendricius/closure_tree,procore/closure_tree,seuros/closure_tree,hendricius/closure_tree,seuros/closure_tree,procore/closure_tree,froderik/closure_tree,procore/closure_tree