From: Robert Haas <rhaas@postgresql.org>
Date: Fri, 27 Jan 2012 17:13:49 +0000 (-0500)
Subject: Document that analyzing an empty table doesn't update the statistics.
X-Git-Url: http://git.postgresql.org/gitweb/?a=commitdiff_plain;h=db6de5b71ef2d91dde94fc0de8adf45372bc332d;p=users%2Fc2main%2Fpostgres.git

Document that analyzing an empty table doesn't update the statistics.

Per a suggestion from Sergey Konoplev
---

diff --git a/doc/src/sgml/ref/analyze.sgml b/doc/src/sgml/ref/analyze.sgml
index 7545fa5d86..8c9057beb9 100644
--- a/doc/src/sgml/ref/analyze.sgml
+++ b/doc/src/sgml/ref/analyze.sgml
@@ -190,6 +190,12 @@ ANALYZE [ VERBOSE ] [ <replaceable class="PARAMETER">table</replaceable> [ ( <re
     or updated, the inheritance statistics will not be up to date unless you
     run <command>ANALYZE</command> manually.
   </para>
+
+  <para>
+    If the table being analyzed is completely empty, <command>ANALYZE</command>
+    will not record new statistics for that table.  Any existing statistics
+    will be retained.
+  </para>
  </refsect1>
 
  <refsect1>