From 44ead23384bc71b73ad09a078f3ecf08828c68d5 Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Wed, 3 Jun 2009 00:38:34 +0000
Subject: [PATCH] Add example of how to generate the session identifier from
pg_stat_activity.
---
doc/src/sgml/config.sgml | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index ec954b0304b..c0dada727a5 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -1,4 +1,4 @@
-<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.217 2009/06/02 17:37:55 tgl Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.218 2009/06/03 00:38:34 momjian Exp $ -->
<chapter Id="runtime-config">
<title>Server Configuration</title>
@@ -3088,7 +3088,14 @@ local0.* /var/log/postgresql
consisting of two 4-byte hexadecimal numbers (without leading zeros)
separated by a dot. The numbers are the process start time and the
process ID, so <literal>%c</> can also be used as a space saving way
- of printing those items.
+ of printing those items. For example, to generate the session
+ identifier from <literal>pg_stat_activity</>, use:
+<programlisting>
+SELECT to_hex(EXTRACT(EPOCH FROM backend_start)::integer) || '.' ||
+ to_hex(procpid)
+FROM pg_stat_activity;
+</programlisting>
+
</para>
<tip>
--
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