From 29f0a3e403ecfa8577faecae4f85591aa6f3da54 Mon Sep 17 00:00:00 2001
From: Paul Ramsey <pramsey@cleverelephant.ca>
Date: Fri, 22 May 2015 12:51:14 +0000
Subject: [PATCH] #3123, add example using array input form of function

git-svn-id: http://svn.osgeo.org/postgis/trunk@13540 b70326c6-7e19-0410-871a-916f4a2858ee
---
 doc/reference_output.xml | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/doc/reference_output.xml b/doc/reference_output.xml
index 8aa20d38e..a54c7a49a 100644
--- a/doc/reference_output.xml
+++ b/doc/reference_output.xml
@@ -1222,7 +1222,17 @@ SELECT ST_AsTWKB('LINESTRING(1 1,5 5)'::geometry);
                  st_astwkb                  
 --------------------------------------------
 \x02000202020808
+
+</programlisting>
+<para>To create an aggregate TWKB object including identifiers aggregate the desired geometries and objects first, using "array_agg()", then call the appropriate TWKB function.
+</para>
+<programlisting>
+SELECT ST_AsTWKB(array_agg(geom), array_agg(gid)) FROM mytable;
+                 st_astwkb                  
+--------------------------------------------
+\x040402020400000202
 </programlisting>
+
 		  </refsection>
 
 		  <refsection>
-- 
2.40.0