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-rw-r--r--doc/src/sgml/config.sgml2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 5549b7dce62..1da7dfbc5cd 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -4707,7 +4707,7 @@ local0.* /var/log/postgresql
of printing those items. For example, to generate the session
identifier from <literal>pg_stat_activity</>, use this query:
<programlisting>
-SELECT to_hex(EXTRACT(EPOCH FROM backend_start)::integer) || '.' ||
+SELECT to_hex(trunc(EXTRACT(EPOCH FROM backend_start))::integer) || '.' ||
to_hex(pid)
FROM pg_stat_activity;
</programlisting>