Add new variable "server_version_num", which is almost the same as

"server_version" but uses the handy PG_VERSION_NUM which allows apps to
do things like if ($version >= 80200) without having to parse apart the
value of server_version themselves.

Greg Sabino Mullane greg@turnstep.com

doc/src/sgml/config.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.78 2006/08/29 11:37:47 petere Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.79 2006/09/02 13:12:50 momjian Exp $ -->
 
 <chapter Id="runtime-config">
   <title>Server Configuration</title>
@@ -4226,6 +4226,19 @@ dynamic_library_path = 'C:\tools\postgresql;H:\my_project\lib;$libdir'
       </listitem>
      </varlistentry>
 
+     <varlistentry id="guc-server-version-num" xreflabel="server_version_num">
+      <term><varname>server_version_num</varname> (<type>integer</type>)</term>
+      <indexterm>
+       <primary><varname>server_version_num</> configuration parameter</primary>
+      </indexterm>
+      <listitem>
+       <para>
+        Reports the version number of the server as an integer. It is determined 
+        by the value of <literal>PG_VERSION_NUM</> when building the server.
+       </para>
+      </listitem>
+     </varlistentry>
+
     </variablelist>
    </sect1>
 

src/backend/utils/misc/check_guc

@@ -18,9 +18,9 @@
 ## can be ignored
 INTENTIONALLY_NOT_INCLUDED="autocommit debug_deadlocks exit_on_error \
 is_superuser lc_collate lc_ctype lc_messages lc_monetary lc_numeric lc_time \
-pre_auth_delay role seed server_encoding server_version session_authorization \
-trace_lock_oidmin trace_lock_table trace_locks trace_lwlocks trace_notify \
-trace_userlocks transaction_isolation transaction_read_only \
+pre_auth_delay role seed server_encoding server_version server_version_int \
+session_authorization trace_lock_oidmin trace_lock_table trace_locks trace_lwlocks \
+trace_notify trace_userlocks transaction_isolation transaction_read_only \
 zero_damaged_pages"
 
 ### What options are listed in postgresql.conf.sample, but don't appear 

src/backend/utils/misc/guc.c

@@ -10,7 +10,7 @@
  * Written by Peter Eisentraut <peter_e@gmx.net>.
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.346 2006/08/31 15:10:51 petere Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.347 2006/09/02 13:12:50 momjian Exp $
  *
  *--------------------------------------------------------------------
  */
@@ -220,6 +220,7 @@ static char *locale_ctype;
 static char *regex_flavor_string;
 static char *server_encoding_string;
 static char *server_version_string;
+static int  server_version_num;
 static char *timezone_string;
 static char *timezone_abbreviations_string;
 static char *XactIsoLevel_string;
@@ -1627,6 +1628,17 @@ static struct config_int ConfigureNamesInt[] =
 		DEFAULT_EFFECTIVE_CACHE_SIZE, 1, INT_MAX, NULL, NULL
 	},
 
+	{
+		/* Can't be set in postgresql.conf */
+		{"server_version_num", PGC_INTERNAL, PRESET_OPTIONS,
+			gettext_noop("Shows the server version as an integer."),
+			NULL,
+			GUC_REPORT | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
+		},
+		&server_version_num,
+		PG_VERSION_NUM, PG_VERSION_NUM, PG_VERSION_NUM, NULL, NULL
+	},
+
 	/* End-of-list marker */
 	{
 		{NULL, 0, 0, NULL, NULL}, NULL, 0, 0, 0, NULL, NULL