Update now-obsolete example of platform-specific regression comparison

files.

doc/src/sgml/regress.sgml

-<!-- $Header: /cvsroot/pgsql/doc/src/sgml/regress.sgml,v 1.17 2001/03/20 00:09:36 tgl Exp $ -->
+<!-- $Header: /cvsroot/pgsql/doc/src/sgml/regress.sgml,v 1.18 2001/08/06 22:53:26 tgl Exp $ -->
 
  <chapter id="regress">
   <title id="regress-title">Regression Tests</title>
@@ -49,7 +49,7 @@
 <screen>
 <computeroutput>
 ======================
- All 76 tests passed.
+ All 77 tests passed.
 ======================
 </computeroutput>
 </screen>
@@ -176,15 +176,24 @@
     
    <sect2>
     <title>Date and time differences</title>
-      
+
+    <para>
+     Some of the queries in the <quote>timestamp</quote> test will
+     fail if you run the test on the day of a daylight-savings time
+     changeover, or the day before or after one.  These queries assume
+     that the intervals between midnight yesterday, midnight today and
+     midnight tomorrow are exactly twenty-four hours -- which is wrong
+     if daylight-savings time went into or out of effect meanwhile.
+    </para>
+
     <para>
      Most of the date and time results are dependent on the time zone
      environment.  The reference files are generated for time zone
      PST8PDT (Berkeley, California) and there will be apparent
      failures if the tests are not run with that time zone setting.
      The regression test driver sets environment variable
-     <envar>PGTZ</envar> to <literal>PST8PDT</literal> to ensure
-     proper results.  However, your system must provide library
+     <envar>PGTZ</envar> to <literal>PST8PDT</literal>, which normally
+     ensures proper results.  However, your system must provide library
      support for the PST8PDT time zone, or the time zone-dependent
      tests will fail. To verify that your machine does have this
      support, type the following:
@@ -214,15 +223,6 @@ PGTZ='PST8PDT7,M04.01.0,M10.05.03'; export PGTZ
      pre-1970 PDT times to be displayed in PST instead.  This will
      result in localized differences in the test results.
     </para>
-      
-    <para>
-     Some of the queries in the <quote>timestamp</quote> test will
-     fail if you run the test on the day of a daylight-savings time
-     changeover, or the day before or after one.  These queries assume
-     that the intervals between midnight yesterday, midnight today and
-     midnight tomorrow are exactly twenty-four hours -- which is wrong
-     if daylight-savings time went into or out of effect meanwhile.
-    </para>
    </sect2>
     
    <sect2>
@@ -363,24 +363,17 @@ testname/platformpattern=comparisonfilename
    </para>
 
    <para>
-    For example: the int2 regression test includes a deliberate entry
-    of a value that is too large to fit in int2.  The specific error
-    message that is produced is platform-dependent; our reference
-    platform emits
-<screen>
-<computeroutput>ERROR:  pg_atoi: error reading "100000": Numerical result out of range</computeroutput>
-</screen>
-    but a fair number of other Unix platforms emit
-<screen>
-<computeroutput>ERROR:  pg_atoi: error reading "100000": Result too large</computeroutput>
-</screen>
+    For example: some systems using older time zone libraries fail to apply
+    daylight-savings corrections to dates before 1970, causing
+    pre-1970 PDT times to be displayed in PST instead.  This causes a
+    few differences in the <filename>horology</> regression test.
     Therefore, we provide a variant comparison file,
-    <filename>int2-too-large.out</filename>, that includes this
-    spelling of the error message.  To silence the bogus
+    <filename>horology-no-DST-before-1970.out</filename>, which includes
+    the results to be expected on these systems.  To silence the bogus
     <quote>failure</quote> message on HPPA platforms, resultmap
     includes
 <programlisting>
-int2/hppa=int2-too-large
+horology/hppa=horology-no-DST-before-1970
 </programlisting>
     which will trigger on any machine for which config.guess's output
     begins with <quote><literal>hppa</literal></quote>.  Other lines