head	1.2;
access;
symbols
	release-6-3:1.1.1.1
	MANUAL_1_0:1.1.1.1
	MANUAL_DIST:1.1.1;
locks; strict;
comment	@# @;


1.2
date	98.04.06.15.33.48;	author thomas;	state dead;
branches;
next	1.1;

1.1
date	97.01.15.15.16.24;	author scrappy;	state Exp;
branches
	1.1.1.1;
next	;

1.1.1.1
date	97.01.15.15.16.24;	author scrappy;	state Exp;
branches;
next	;


desc
@@


1.2
log
@Older html conversion of original docs to html
 superceded by the new sgml/docbook versions.
@
text
@<HTML>
<HEAD>
	<TITLE>The POSTGRES95 User Manual - THE POSTGRES RULE SYSTEM</TITLE>
</HEAD>

<BODY>

<font size=-1>
<A HREF="pg95user.html">[ TOC ]</A> 
<A HREF="lobj.html">[ Previous ]</A> 
<A HREF="admin.html">[ Next ]</A> 
</font>
<HR>
<H1>14.  THE POSTGRES RULE SYSTEM
</H1><HR>
     Production  rule  systems  are conceptually simple, but
     there are many subtle points involved in actually using
     them.  Consequently, we will not attempt to explain the
     actual syntax and operation of the POSTGRES rule system
     here.  Instead, you should read <A HREF="refs.html#STON90b">[STON90b]</A> to understand
     some of these points and the theoretical foundations of
     the  POSTGRES  rule  system before trying to use rules.
     The discussion in this section is intended  to  provide
     an  overview  of the POSTGRES rule system and point the
     user at helpful references and examples.
     The "query rewrite" rule  system  modifies  queries  to
     take rules into consideration, and then passes the modified 
     query to the query optimizer for  execution.   It
     is  very powerful, and can be used for many things such
     as query language procedures, views, and versions.  The
     power  of  this  rule system is discussed in 
     <A HREF="refs.html#ONG90">[ONG90]</A> as
     well as <A HREF="refs.html#STON90b">[STON90b]</A>.
<HR>
<font size=-1>
<A HREF="pg95user.html">[ TOC ]</A> 
<A HREF="lobj.html">[ Previous ]</A> 
<A HREF="admin.html">[ Next ]</A> 
</font>
</BODY>
</HTML>


@


1.1
log
@Initial revision
@
text
@@


1.1.1.1
log
@Import of PostgreSQL User Manual
@
text
@@
