From 2296e299986aece2cdf0a4bff273bc505fb81368 Mon Sep 17 00:00:00 2001
From: Bruce Momjian
Date: Mon, 23 Jun 2008 21:10:49 +0000
Subject: Add libpq comment about how to determine the format used for passing
 binary values.

Add comments to libpq C function for parameter passing.
---
 doc/src/sgml/libpq.sgml | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'doc/src')

diff --git a/doc/src/sgml/libpq.sgml b/doc/src/sgml/libpq.sgml
index 006c81f3077..629e501b8ac 100644
--- a/doc/src/sgml/libpq.sgml
+++ b/doc/src/sgml/libpq.sgml
@@ -1,4 +1,4 @@
-<!-- $PostgreSQL: pgsql/doc/src/sgml/libpq.sgml,v 1.258 2008/06/01 16:23:08 tgl Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/libpq.sgml,v 1.259 2008/06/23 21:10:49 momjian Exp $ -->
 
 <chapter id="libpq">
  <title><application>libpq</application> - C Library</title>
@@ -1397,6 +1397,14 @@ PGresult *PQexecParams(PGconn *conn,
             If the array pointer is null then all parameters are presumed
             to be text strings.
            </para>
+           <para>
+            Values passed in binary format require knowlege of
+            the internal representation expected by the backend.
+            For example, integers must be passed in network byte
+            order.  Passing <type>numeric</> values requires
+            knowledge of the server storage format, as implemented
+            in <filename>src/backend/utils/adt/numeric.c</>.
+           </para>
           </listitem>
          </varlistentry>
 
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