Что делает pear DB_NestedSet

[TotiMan]

Что делает pear DB_NestedSet

Что делает pear DB_NestedSet, какого его практическое применение.?

 

[jonjonson]

DB_NestedSet let's you create trees with infinite depth
inside a relational database.
The package provides a way to
o create/update/delete nodes
o query nodes, trees and subtrees
o copy (clone) nodes, trees and subtrees
o move nodes, trees and subtrees
o Works with PEAR:B, PEAR::MDB, PEAR::MDB2
o output the tree with
- PEAR::HTML_TreeMenu
- TigraMenu (http://www.softcomplex.com/products/tigra_menu/)
- CoolMenus (http://www.dhtmlcentral.com/projects/coolmenus/)
- PEAR::Image_GraphViz (http://pear.php.net/package/Image_GraphViz)
- PEAR::HTML_Menu

http://pear.php.net/package/DB_NestedSet/

В общем, если нужно вырастить дерево и есть база данных, то дерево можно вырастить в ней.

 

[MiRacLe]

DB_NestedSet let's you create trees with infinite depth
inside a relational database.
The package provides a way to:
create/update/delete nodes
query nodes, trees and subtrees
copy (clone) nodes, trees and subtrees
move nodes, trees and subtrees
output the tree

In the conclusion of this series we
look at the nested sets approach
(popularized by Joe Celko) for
implementing trees and hierarchies
in SQLBase databases.