From 1420f3a9827a39e5c6c998f6fa35a6fc97903145 Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Mon, 24 Mar 2014 14:36:36 -0400
Subject: Fix ts_rank_cd() to ignore stripped lexemes

Previously, stripped lexemes got a default location and could be
considered if mixed with non-stripped lexemes.

BACKWARD INCOMPATIBILITY CHANGE
---
 doc/src/sgml/textsearch.sgml | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

(limited to 'doc/src')

diff --git a/doc/src/sgml/textsearch.sgml b/doc/src/sgml/textsearch.sgml
index 604e54579de..9e78286bb59 100644
--- a/doc/src/sgml/textsearch.sgml
+++ b/doc/src/sgml/textsearch.sgml
@@ -889,9 +889,13 @@ SELECT plainto_tsquery('english', 'The Fat &amp; Rats:C');
        </para>
 
        <para>
-        This function requires positional information in its input.
-        Therefore it will not work on <quote>stripped</> <type>tsvector</>
-        values &mdash; it will always return zero.
+        This function requires lexeme positional information to perform
+        its calculation.  Therefore, it ignores any <quote>stripped</>
+        lexemes in the <type>tsvector</>.  If there are no unstripped
+        lexemes in the input, the result will be zero.  (See <xref
+        linkend="textsearch-manipulate-tsvector"> for more information
+        about the <function>strip</> function and positional information
+        in <type>tsvector</>s.)
        </para>
       </listitem>
      </varlistentry>
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