yet another trunc* bug

myisam/ft_boolean_search.c

@@ -62,11 +62,12 @@ typedef struct st_ftb_expr FTB_EXPR;
 struct st_ftb_expr
 {
   FTB_EXPR *up;
-  byte     *quot, *qend;
   float     weight;
   uint      flags;
-  my_off_t  docid[2];             /* for index search and for scan */
+  my_off_t  docid[2];
+/* ^^^^^^^^^^^^^^^^^^ FTB_{EXPR,WORD} common section */
   float     cur_weight;
+  byte     *quot, *qend;
   int       yesses;               /* number of "yes" words matched */
   int       nos;                  /* number of "no"  words matched */
   int       ythresh;              /* number of "yes" words in expr */
@@ -78,7 +79,8 @@ typedef struct st_ftb_word
   FTB_EXPR *up;
   float     weight;
   uint      flags;
-  my_off_t  docid[2];             /* for index search and for scan */
+  my_off_t  docid[2];
+/* ^^^^^^^^^^^^^^^^^^ FTB_{EXPR,WORD} common section */
   uint      ndepth;
   int       len;
   /* ... docid cache can be added here. SerG */
@@ -217,13 +219,15 @@ static void _ftb_init_index_search(FT_INFO *ftb)
     if (ftbw->flags & FTB_FLAG_TRUNC)
     {
       /*
-	special treatment for truncation operator :((
-        1. +trunc* and there're other (not +trunc*) words
+	special treatment for truncation operator
+        1. there are some (besides this) +words
            | no need to search in the index, it can never ADD new rows
            | to the result, and to remove half-matched rows we do scan anyway
         2. -trunc*
            | same as 1.
-        3. trunc*
+        3. in 1 and 2, +/- need not be on the same expr. level,
+           but can be on any upper level, as in +word +(trunc1* trunc2*)
+        4. otherwise
            | We have to index-search for this prefix.
            | It may cause duplicates, as in the index (sorted by <word,docid>)
            |   <aaaa,row1>
@@ -231,23 +235,32 @@ static void _ftb_init_index_search(FT_INFO *ftb)
            |   <aacc,row1>
            | Searching for "aa*" will find row1 twice...
       */
-      if ( test(ftbw->flags&FTB_FLAG_NO) ||                 /* 2 */
-          (test(ftbw->flags&FTB_FLAG_YES) &&                /* 1 */
-           ftbw->up->ythresh - ftbw->up->yweaks >1))        /* 1 */
+      FTB_EXPR *ftbe;
+      for (ftbe=(FTB_EXPR*)ftbw;
+           ftbe->up && !(ftbe->up->flags & FTB_FLAG_TRUNC);
+           ftbe->up->flags|= FTB_FLAG_TRUNC, ftbe=ftbe->up)
       {
+        if (ftbe->flags & FTB_FLAG_NO ||                     /* 2 */
+             ftbe->up->ythresh - ftbe->up->yweaks >1)        /* 1 */
+        {
+          FTB_EXPR *top_ftbe=ftbe->up->up;
           ftbw->docid[0]=HA_POS_ERROR;
-        ftbw->up->yweaks++;
-        continue;
+          for (ftbe=ftbw->up; ftbe != top_ftbe; ftbe=ftbe->up)
+            if (ftbe->flags & FTB_FLAG_YES)
+              ftbe->yweaks++;
+          ftbe=0;
+          break;
         }
-      else /* 3 */
-      {
+      }
+      if (!ftbe)
+        continue;
+      /* 3 */
       if (!is_tree_inited(& ftb->no_dupes))
         init_tree(& ftb->no_dupes,0,0,sizeof(my_off_t),
             _ftb_no_dupes_cmp,0,0,0);
       else
         reset_tree(& ftb->no_dupes);
     }
-    }
     r=_mi_search(info, keyinfo, (uchar*) ftbw->word, ftbw->len,
                               SEARCH_FIND | SEARCH_BIGGER, keyroot);
     if (!r)

mysql-test/r/fulltext.result

@@ -147,6 +147,9 @@ aaa20 bbb15
 aaa30 bbb10
 select * from t1 where match a against ("+aaa* +ccc*" in boolean mode);
 a
+select * from t1 where match a against ("+aaa10 +(bbb*)" in boolean mode);
+a
+aaa10 bbb20
 drop table t1;
 CREATE TABLE t1 (
 id int(11),

mysql-test/t/fulltext.test

@@ -78,6 +78,7 @@ insert t1 values ("aaa10 bbb20"), ("aaa20 bbb15"), ("aaa30 bbb10");
 select * from t1 where match a against ("+aaa* +bbb*" in boolean mode);
 select * from t1 where match a against ("+aaa* +bbb1*" in boolean mode);
 select * from t1 where match a against ("+aaa* +ccc*" in boolean mode);
+select * from t1 where match a against ("+aaa10 +(bbb*)" in boolean mode);
 drop table t1;
 
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