In 'Joins between classes' in Section 5 of the tutorial we have, in

the first paragraph:

    As an example, say we wish to find all the records that
    are in the  temperature  range  of  other records. In
    effect, we need to compare the temp_lo and temp_hi
    attributes of each EMP instance to the temp_lo and
    temp_hi  attributes of all other EMP instances.

I believe that EMP should read WEATHER, as the example query that
follows joins WEATHER to itself.

EMP is often used in Oracle examples.

Regards,
Graham

Other RULE cleanups

doc/src/sgml/query.sgml

 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/query.sgml,v 1.13 2000/09/29 20:21:34 petere Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/query.sgml,v 1.14 2000/12/12 16:47:52 momjian Exp $
 -->
 
  <chapter id="query">
@@ -273,8 +273,8 @@ SELECT * INTO TABLE temp FROM weather;
     As an example, say we wish to find all the records that
     are in the  temperature  range  of  other  records.  In
     effect,  we  need  to  compare  the temp_lo and temp_hi
-    attributes of each EMP  instance  to  the  temp_lo  and
-    temp_hi  attributes of all other EMP instances.
+    attributes of each WEATHER  instance  to  the  temp_lo  and
+    temp_hi  attributes of all other WEATHER instances.
     <note>
      <para>
       This  is only a conceptual model.  The actual join may

doc/src/sgml/ref/create_rule.sgml

 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_rule.sgml,v 1.19 2000/10/05 19:48:17 momjian Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_rule.sgml,v 1.20 2000/12/12 16:47:52 momjian Exp $
 Postgres documentation
 -->
 
@@ -208,14 +208,14 @@ ON UPDATE TO emp-1.salary WHERE emp-2.name = "Joe"
 CREATE RULE bad_rule_combination_1 AS
     ON SELECT TO emp
     DO INSTEAD 
-	SELECT TO toyemp;
+	SELECT * FROM toyemp;
      </programlisting>
 
      <programlisting>
 CREATE RULE bad_rule_combination_2 AS
     ON SELECT TO toyemp
     DO INSTEAD 
-	SELECT TO emp;
+	SELECT * FROM emp;
      </programlisting>
      <para>
       This attempt to select from EMP will cause