?? http:^^www.cs.cornell.edu^info^courses^current^cs537^predator.html
字號:
MIME-Version: 1.0
Server: CERN/3.0
Date: Sunday, 24-Nov-96 22:06:29 GMT
Content-Type: text/html
Content-Length: 4398
Last-Modified: Thursday, 17-Oct-96 18:38:57 GMT
<html> <head><title>The PREDATOR Project</title></head><body><h1 ALIGN="center">The PREDATOR DBMS Project</h1><p><hr><h3>Contents</h3><p><ul> <LI> <A HREF="#sec:intro">What is PREDATOR?</A> <LI> <a href="#sec:eadt">Paper describing the Enhanced Abstract Data Type (E-ADT) paradigm</a> <LI> <a href="#sec:design">Code design of PREDATOR</a> <LI> <A HREF="#sec:install">How to install PREDATOR</A> <LI> <A HREF="#sec:sysdev">Tips on system development</A> <LI> <A HREF="#sec:coding">Coding conventions</A> <LI> <A HREF="#sec:test">Testing</A> <LI> <A HREF="#sec:ack">Acknowledgements</A></ul><hr><h3><a name="sec:intro">What is PREDATOR?</a></h3><p>The PREDATOR database system (PRedator Enhanced DAta Type Object-Relational DBMS) is an object-relational DBMS built as a researchprototype to study how complex data types should be supported.Existing technology is based on the notion of Abstract Data Types (ADTs): each data type is encapsulated through a well known interface,and the database system maintains an extensible table of ADTs. Each ADT provides a bunch of user-level methods that can beapplied from within an SQL query to operate on ADT values.The PREDATOR system recognizes that the cost of ADT operationscan dominate database performance. Consequently,the ADT notion is "enhanced" so that each data type canmaintain meta-information, use that meta-information foroptimizing operations on the ADT, and apply optimizationson expressions involving concatenations of ADT operations.Further, each data type can provide a "query language" in whichcomplex operations on that type can be expressed. ThisEnhanced Abstract Data Type (E-ADT) paradigm is the basic technology in PREDATOR. Providing the support forthis paradigm requires a fundamental redesign of manycomponents of a traditional object-relational DBMS.The purpose of PREDATOR is to fully explore the E-ADTidea, and to see how queries involving complex objectexpressions can be further optimized by exploitinginteractions between E-ADTs. The current focus of workis to build support for several different data types,each of which can co-exist independent of the others.<p><h3><a name="sec:eadt">The E-ADT paradigm</a></h3><p>The E-ADT paradigm is explained in detail in a <a href="eadt.ps">technical report</a>, also being submitted as a paper to ACM SIGMOD 97. This documentalso describes the high-level architecture of PREDATOR,the interesting design issues, possible extensions of the currenttechnology, and open problems for future research.<p><h3><a name="sec:design">System code structure</a></h3><p>The detailed code design is described<a href="impl.html">here</a>. This may not always beupto date, because the code base is constantly beingupdated. For most students in CS537, you will onlyneed to concentrate on the portion of the design document dealing with the SQL engine, and/or the portion dealing with newdata types.<p><h3><a name="sec:install">Installation instructions</a></h3><p>These instructions are only for Cornell CS537 students.For others, PREDATOR is not yet a publicly available pieceof software, but it will be in a few months. Here are the <a href="install.html">installation instructions</a> andsome <a href=testing.html> quick tests </a> you can run.<p><h3><a name="sec:sysdev">System Development</a></h3><p>Look <a href="sysdev.html">here</a> for some tips on systemdevelopment in PREDATOR.<p><h3><a name="sec:coding">Coding conventions</a></h3><p>When adding to PREDATOR, it is crucial that you follow the same coding conventions that have been used relatively uniformly throughout the code. <a href="coding.html">Click here</a> to get to a listof dos and don'ts. The document also tells you how to use RCS,a simple source code control mechanism used to managethe distribution of PREDATOR code.<p><h3><a name="sec:test">Testing</a></h3><p>Initially, after installing your code, you shouldtry some <a href=testing.html> quick tests </a>. On a more regularbasis, as you add code, you should run a test suite that is beingdeveloped for PREDATOR. Details of this test suite and how torun it are <a href="test_suite.html"> here </a>.<p><h3><a name="sec:ack">Acknowledgements</a></h3><p>PREDATOR is built using the SHORE storage manager as thedata repository.<p><HR></body></html>?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -