Merge work:/home/bk/mysql-4.0

into serg.mysql.com:/usr/home/serg/Abk/mysql-4.0


Docs/manual.texi:
  Auto merged

Docs/manual.texi

@@ -48036,6 +48036,11 @@ Our TODO section contains what we plan to have in 4.0. @xref{TODO MySQL 4.0}.
 
 @itemize @bullet
 @item
+Fixed bug with empty expression for boolean fulltext search.
+@item
+Fixed bug in updating fulltext key from/to @code{NULL}.
+No coredump anymore.
+@item
 ODBC compatibility: added @code{BIT_LENGTH()} function.
 @item
 Fixed bug in @code{FLUSH QUERY CACHE}.

myisam/ft_boolean_search.c

@@ -369,6 +369,8 @@ float ft_boolean_find_relevance(FT_INFO *ftb, byte *record, uint length)
 
   if (docid == HA_POS_ERROR)
     return -2.0;
+  if (!ftb->queue.elements)
+    return 0;
   if (ftb->state == READY || ftb->state == INDEX_DONE)
   {
     for (i=1; i<=ftb->queue.elements; i++)