Fixed Bug #61266pg_affected_rows inconsistent behavior (depends on PostgreSQL server version)

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@332751 c90b9560-bf6c-de11-be94-00142212c4b1

reference/pgsql/functions/pg-affected-rows.xml

@@ -19,6 +19,10 @@
    <literal>UPDATE</literal>, and <literal>DELETE</literal>
    queries. 
   </para>
+  <para>
+   Since PostgreSQL 9.0 and above, the server returns the number of 
+   SELECTed rows. Older PostgreSQL return 0 for SELECT.
+  </para>
   <note>
    <para>
     This function used to be called <function>pg_cmdtuples</function>.