fixed a bug in boolean fts where a word queue was created based on...

fixed a bug in boolean fts where a word queue was created based on min_word_len, while with trunc* operator one could get shorter words

myisam/ft_boolean_search.c

@@ -308,7 +308,7 @@ FT_INFO * ft_init_boolean_search(MI_INFO *info, uint keynr, byte *query,
     Hack: instead of init_queue, we'll use reinit queue to be able
     to alloc queue with alloc_root()
   */
-  res=ftb->queue.max_elements=1+query_len/(ft_min_word_len+1);
+  res=ftb->queue.max_elements=1+query_len/(min(ft_min_word_len,2)+1);
   ftb->queue.root=(byte **)alloc_root(&ftb->mem_root, (res+1)*sizeof(void*));
   reinit_queue(& ftb->queue, res, 0, 0,
                          (int (*)(void*,byte*,byte*))FTB_WORD_cmp, 0);

mysql-test/r/fulltext.result

@@ -266,4 +266,6 @@ insert into t2 values (3, 1, 'xxbuz');
 select * from t1 join t2 using(`t1_id`) where match (t1.name, t2.name) against('xxfoo' in boolean mode);
 t1_id	name	t2_id	t1_id	name
 1	data1	1	1	xxfoo
+select * from t2 where match name against ('a* b* c* d* e* f*' in boolean mode);
+t2_id	t1_id	name
 drop table t1,t2;

mysql-test/t/fulltext.test

@@ -213,5 +213,11 @@ insert into t2 values (1, 1, 'xxfoo');
 insert into t2 values (2, 1, 'xxbar');
 insert into t2 values (3, 1, 'xxbuz');
 select * from t1 join t2 using(`t1_id`) where match (t1.name, t2.name) against('xxfoo' in boolean mode);
+
+#
+# bug with many short (< ft_min_word_len) words in boolean search
+#
+select * from t2 where match name against ('a* b* c* d* e* f*' in boolean mode);
+
 drop table t1,t2;