Fix generation of too long headline with ShortWords.

Per http://archives.postgresql.org/pgsql-hackers/2008-09/msg01088.php

diff --git a/src/backend/tsearch/wparser_def.c b/src/backend/tsearch/wparser_def.c
index d444b76808b18ba84e4724a2d081cefe67947d43..24f371ab95dd725f6fb7cd894834016c7da9406b 100644 (file)
--- a/src/backend/tsearch/wparser_def.c
+++ b/src/backend/tsearch/wparser_def.c
@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *       $PostgreSQL: pgsql/src/backend/tsearch/wparser_def.c,v 1.14.2.1 2008/10/17 17:32:59 teodor Exp $
+ *       $PostgreSQL: pgsql/src/backend/tsearch/wparser_def.c,v 1.14.2.2 2009/01/15 17:05:39 teodor Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1799,12 +1799,14 @@ prsd_headline(PG_FUNCTION_ARGS)
                                if (curlen < min_words && i >= prs->curwords)
                                {                               /* got end of text and our cover is shoter
                                                                 * than min_words */
-                                       for (i = p; i >= 0; i--)
+                                       for (i = p - 1; i >= 0; i--)
                                        {
                                                if (!NONWORDTOKEN(prs->words[i].type))
                                                        curlen++;
                                                if (prs->words[i].item && !prs->words[i].repeated)
                                                        poslen++;
+                                               if ( curlen >= max_words )
+                                                       break;
                                                if (NOENDTOKEN(prs->words[i].type) || prs->words[i].len <= shortword)
                                                        continue;
                                                if (curlen >= min_words)