From 311bcfc6b3acdd6fd152798c7f287ddf74fa2a98 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Tue, 16 Apr 2024 21:46:48 +0200
Subject: Adding upstream version 15.4.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 doc/src/sgml/oldsnapshot.sgml | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 doc/src/sgml/oldsnapshot.sgml

(limited to 'doc/src/sgml/oldsnapshot.sgml')

diff --git a/doc/src/sgml/oldsnapshot.sgml b/doc/src/sgml/oldsnapshot.sgml
new file mode 100644
index 0000000..a665ae7
--- /dev/null
+++ b/doc/src/sgml/oldsnapshot.sgml
@@ -0,0 +1,33 @@
+<!-- doc/src/sgml/oldsnapshot.sgml -->
+
+<sect1 id="oldsnapshot" xreflabel="old_snapshot">
+ <title>old_snapshot</title>
+
+ <indexterm zone="oldsnapshot">
+  <primary>old_snapshot</primary>
+ </indexterm>
+
+ <para>
+  The <filename>old_snapshot</filename> module allows inspection
+  of the server state that is used to implement
+  <xref linkend="guc-old-snapshot-threshold" />.
+ </para>
+
+ <sect2>
+  <title>Functions</title>
+
+  <variablelist>
+   <varlistentry>
+    <term><function>pg_old_snapshot_time_mapping(array_offset OUT int4, end_timestamp OUT timestamptz, newest_xmin OUT xid) returns setof record</function></term>
+    <listitem>
+     <para>
+      Returns all of the entries in the server's timestamp to XID mapping.
+      Each entry represents the newest xmin of any snapshot taken in the
+      corresponding minute.
+     </para>
+    </listitem>
+   </varlistentry>
+  </variablelist>
+ </sect2>
+
+</sect1>
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