after-merge fix: make concurrent-insert-skip code ft2-aware

mysql-test/t/func_group.test:
  no innodb is not an error

myisam/ft_boolean_search.c

@@ -205,6 +205,7 @@ static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search)
   int r;
   uint off;
   int subkeys;
+  my_bool can_go_down;
   MI_INFO *info=ftb->info;
 
   if (init_search)
@@ -222,11 +223,22 @@ static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search)
                    USE_WHOLE_KEY, SEARCH_BIGGER, ftbw->key_root);
   }
 
+  can_go_down=(!ftbw->off && (init_search || (ftbw->flags & FTB_FLAG_TRUNC)));
   /* Skip rows inserted by concurrent insert */
-  while (!r && info->lastpos >= info->state->data_file_length)
+  while (!r)
+  {
+    if (can_go_down)
+    {
+      /* going down ? */
+      off=info->lastkey_length-HA_FT_WLEN-info->s->base.rec_reflength;
+      subkeys=ft_sintXkorr(info->lastkey+off);
+    }
+    if (subkeys<0 || info->lastpos < info->state->data_file_length)
+      break;
     r= _mi_search_next(info, ftbw->keyinfo, info->lastkey,
                        info->lastkey_length,
 		       SEARCH_BIGGER, ftbw->key_root);
+  }
 
   if (!r && !ftbw->off)
   {
@@ -270,8 +282,6 @@ static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search)
   if (!ftbw->off && (init_search || (ftbw->flags & FTB_FLAG_TRUNC)))
   {
     /* going down ? */
-    get_key_full_length_rdonly(off, info->lastkey);
-    subkeys=ft_sintXkorr(info->lastkey+off);
     if (subkeys<0)
     {
       /*

myisam/ft_nlq_search.c

@@ -90,6 +90,7 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio)
 
   /* Skip rows inserted by current inserted */
   for (r=_mi_search(info, keyinfo, keybuff, keylen, SEARCH_FIND, key_root) ;
+       (subkeys=ft_sintXkorr(info->lastkey+info->lastkey_length-extra)) > 0 &&
        !r && info->lastpos >= info->state->data_file_length ;
        r= _mi_search_next(info, keyinfo, info->lastkey,
                           info->lastkey_length, SEARCH_BIGGER, key_root))
@@ -105,7 +106,6 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio)
                         info->lastkey_length-extra-1, keybuff+1,keylen-1,0,0))
      break;
 
-    subkeys=ft_sintXkorr(info->lastkey+info->lastkey_length-extra);
     if (subkeys<0)
     {
       if (doc_cnt)
@@ -119,7 +119,7 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio)
       key_root=info->lastpos;
       keylen=0;
       r=_mi_search_first(info, keyinfo, key_root);
-      continue;
+      goto do_skip;
     }
 #if HA_FT_WTYPE == HA_KEYTYPE_FLOAT
     tmp_weight=*(float*)&subkeys;
@@ -157,8 +157,9 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio)
     else
 	r=_mi_search(info, keyinfo, info->lastkey, info->lastkey_length,
                      SEARCH_BIGGER, key_root);
-
-    while (!r && info->lastpos >= info->state->data_file_length)
+do_skip:
+    while ((subkeys=ft_sintXkorr(info->lastkey+info->lastkey_length-extra)) > 0 &&
+           !r && info->lastpos >= info->state->data_file_length)
       r= _mi_search_next(info, keyinfo, info->lastkey, info->lastkey_length,
                          SEARCH_BIGGER, key_root);
 

mysql-test/t/func_group.test

@@ -366,7 +366,9 @@ explain
 select concat(min(t1.a1),min(t2.a4)) from t1, t2 where t2.a4 <> 'AME';
 drop table t1, t2;
 
+--disable_warnings
 create table t1 (USR_ID integer not null, MAX_REQ integer not null, constraint PK_SEA_USER primary key (USR_ID)) engine=InnoDB;
+--enable_warnings
 insert into t1 values (1, 3);
 select count(*) + MAX_REQ - MAX_REQ + MAX_REQ - MAX_REQ + MAX_REQ - MAX_REQ + MAX_REQ - MAX_REQ + MAX_REQ - MAX_REQ from t1 group by MAX_REQ;
 select Case When Count(*) < MAX_REQ Then 1 Else 0 End from t1 where t1.USR_ID = 1 group by MAX_REQ;