Search results
Results from the WOW.Com Content Network
A B+ tree is an m-ary tree with a variable but often large number of children per node. ... When the root is full, we split the root, and create a new root page.
In the B+ tree, the internal nodes do not store any pointers to records, thus all pointers to records are stored in the leaf nodes. In addition, a leaf node may include a pointer to the next leaf node to speed up sequential access. [2] Because B+ tree internal nodes have fewer pointers, each node can hold more keys, causing the tree to be ...
The B+ tree is a structure for indexing single-dimensional data. In order to adopt the B+ tree as a moving object index, the B x-tree uses a linearization technique which helps to integrate objects' location at time t into single dimensional value. Specifically, objects are first partitioned according to their update time.
Database tables and indexes may be stored on disk in one of a number of forms, including ordered/unordered flat files, ISAM, heap files, hash buckets, or B+ trees. Each form has its own particular advantages and disadvantages. The most commonly used forms are B-trees and ISAM.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us
B-trees are a variant of (a,b) trees, so the (a,b) tree article should contain pretty much everything except stuff like the fact that a = B/4 and b = B/2 in a B-tree. Moved this text to the discussion section from the main definition. Chadloder 18:34 Jan 22, 2003 (UTC) The original author interchanged between B+-tree and B-tree.
To turn a regular search tree into an order statistic tree, the nodes of the tree need to store one additional value, which is the size of the subtree rooted at that node (i.e., the number of nodes below it). All operations that modify the tree must adjust this information to preserve the invariant that size[x] = size[left[x]] + size[right[x]] + 1
These statements are misleading, and technically incorrect. B+ Trees are an extension to B-trees, and as such are typically used as indexes for commercial database systems. The B+ Tree comprises two parts: a sequential index containing an entry for every record in the file, and a B-tree acting as a multilevel index to the sequential index entries.