From 7465ae06be4f1dbc90575d68d1ffc3351e1ca855 Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Tue, 8 Mar 2011 11:03:02 -0500
Subject: [PATCH] Document that char() ignores spaces in non-pattern
 comparisons, not in pattern comparisons such as LIKE and regex.

---
 doc/src/sgml/datatype.sgml | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/doc/src/sgml/datatype.sgml b/doc/src/sgml/datatype.sgml
index b8f6e238f0..22d4c4e33a 100644
--- a/doc/src/sgml/datatype.sgml
+++ b/doc/src/sgml/datatype.sgml
@@ -1014,11 +1014,13 @@ SELECT '52093.89'::money::numeric::float8;
     with spaces to the specified width <replaceable>n</>, and are
     stored and displayed that way.  However, the padding spaces are
     treated as semantically insignificant.  Trailing spaces are
-    disregarded when comparing two values of type <type>character</type>,
+    disregarded when non-pattern comparing two values of type <type>character</type>,
     and they will be removed when converting a <type>character</type> value
     to one of the other string types.  Note that trailing spaces
     <emphasis>are</> semantically significant in
-    <type>character varying</type> and <type>text</type> values.
+    <type>character varying</type> and <type>text</type> values, and
+    when using pattern matching comparisons, e.g. <literal>LIKE</>,
+    regular expressions.
    </para>
 
    <para>
-- 
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