%0 Journal Article
%T Research on the Mechanism of Query Optimization in the PostgreSQL<br>PostgreSQL请求优化机制研究
%A LIU Chang-Hao
%A SUN Yu-Fang
%A <br>刘长浩
%A 孙玉芳
%J 计算机科学
%D 2005
%I 
%X As the most powerful and complex free DBMS with the most features, PostgreSQL not only draws the DBMS researchers' & developers' attention, but also is adopted in commerce more and more. It seems that it has a very promising future. This article discusses the implementation of the Query Optimization of the PostgreSQL, and analyzes the kernel part of the optimizer, the generating and choosing of the execution path. And, it points out a shortage of the optimization arithmetic.
%K Query optimization
%K Query optimizer
%K PostgreSQL
%K Path
%K Plan
%K GEQO<br>请求优化
%K 请求优化器
%K PostgreSQL
%K 路径
%K 规划
%K 基因优化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=64A12D73428C8B8DBFB978D04DFEB3C1&aid=4FFF2E520FB567B2&yid=2DD7160C83D0ACED&vid=9971A5E270697F23&iid=E158A972A605785F&sid=D5C9DC4EF2F78008&eid=ED01F5AE50BE09C0&journal_id=1002-137X&journal_name=计算机科学&referenced_num=0&reference_num=6