50 lines
2.4 KiB
Plaintext
50 lines
2.4 KiB
Plaintext
|
/*
|
||
|
|
//[_] [\_]
|
||
|
|
//characters [1] verbatim: [$] [$]
|
||
|
|
//characters [2] formula: [$] [$]
|
||
|
|
//characters [3] capital: [\textsc{] [}]
|
||
|
|
//characters [4] teletype: [\texttt{] [}]
|
||
|
|
//paragraph [11] Title: [{\Large \bf \begin{center}] [\end{center}}]
|
||
|
|
//paragraph [21] table1column: [\begin{quote}\begin{tabular}{l}] [\end{tabular}\end{quote}]
|
||
|
|
//paragraph [22] table2columns: [\begin{quote}\begin{tabular}{ll}] [\end{tabular}\end{quote}]
|
||
|
|
//paragraph [23] table3columns: [\begin{quote}\begin{tabular}{lll}] [\end{tabular}\end{quote}]
|
||
|
|
//paragraph [24] table4columns: [\begin{quote}\begin{tabular}{llll}][\end{tabular}\end{quote}]
|
||
|
|
//[--------] [\hline]
|
||
|
|
//[TOC] [\tableofcontents]
|
||
|
|
|
||
|
|
[11] M-Tree Algebra
|
||
|
|
|
||
|
|
[TOC]
|
||
|
|
\newpage
|
||
|
|
|
||
|
|
1 Overview
|
||
|
|
|
||
|
|
This algebra provides the "mtree"[4] type constructor and the following operators: ("DATA"[4] must be of the same type as the attributes indized in the m-tree):
|
||
|
|
|
||
|
|
* "[_] createmtree [[_]]"[4]\\
|
||
|
|
Creates a new mtree from a relation or tuple stream.\\[1ex]
|
||
|
|
Signature: "relation/tuple-stream x <attr-name> -> mtree"[4]\\
|
||
|
|
Example: "pictures createmtree[Pic]"[4]
|
||
|
|
|
||
|
|
* "[_] createmtree2 [[_], [_]]"[4]\\
|
||
|
|
Like createmtree, but additionally allows to select a mtree-config object.\\[1ex]
|
||
|
|
Signature: "relation/tuple-stream x <attr-name> x <config-name> -> mtree"[4]\\
|
||
|
|
Example: "pictures createmtree2[Pic, limit80e]"[4]
|
||
|
|
|
||
|
|
* "[_] createmtree3 [[_], [_], [_]]"[4]\\
|
||
|
|
Like createmtree2, but additionally allows to select the distance function and distdata type.\\[1ex]
|
||
|
|
Signature: "relation/tuple-stream x <attr-name> x <config-name> x <distfun-name> x <distdata-name> -> mtree"[4]\\
|
||
|
|
Example: "pictures createmtree3[Pic, limit80e, euclid, lab256]"[4]
|
||
|
|
|
||
|
|
* "[_] [_] rangesearch [[_], [_]]"[4]\\
|
||
|
|
Returns all tuples of the relation, for which the indized entries lies inside the query range around the query attribute. The relation should be the same that had been used to create the tree.\\[1ex]
|
||
|
|
Signature: "mtree relation x DATA x real -> tuple stream"[4]\\
|
||
|
|
Example: "pictree pictures rangesearch[pic, 0.2] count"[4]
|
||
|
|
|
||
|
|
* "[_] [_] nnsearch [[_], [_]]"[4]\\
|
||
|
|
Returns all tuples of the relation, which for which the indized entries are the n nearest neigthbours of the query attribute. The relation should be the same that had been used to create the tree.\\[1ex]
|
||
|
|
Signature: "mtree relation x DATA x int -> tuple stream"[4]\\
|
||
|
|
Example: "pictree pictures nnsearch[p1, 5] count"[4]
|
||
|
|
|
||
|
|
*/
|