Fix for parallel search. #1129074

storage/spider/ha_spider.cc

@@ -6748,10 +6748,6 @@ int ha_spider::rnd_init(
           memset(searched_bitmap, 0xFF, no_bytes_in_map(table->read_set));
       }
 
-#ifndef WITHOUT_SPIDER_BG_SEARCH
-      if ((error_num = spider_set_conn_bg_param(this)))
-        DBUG_RETURN(error_num);
-#endif
       set_select_column_mode();
       result_list.keyread = FALSE;
 
@@ -6830,6 +6826,10 @@ int ha_spider::rnd_next_internal(
 #if defined(HS_HAS_SQLCOM) && defined(HAVE_HANDLERSOCKET)
     if (sql_kinds & SPIDER_SQL_KIND_HS)
       DBUG_RETURN(HA_ERR_WRONG_COMMAND);
+#endif
+#ifndef WITHOUT_SPIDER_BG_SEARCH
+    if ((error_num = spider_set_conn_bg_param(this)))
+      DBUG_RETURN(error_num);
 #endif
     if ((error_num = rnd_handler_init()))
       DBUG_RETURN(check_error_mode_eof(error_num));

storage/spider/spd_conn.cc

@@ -1467,11 +1467,23 @@ int spider_set_conn_bg_param(
   else {
     result_list->bgs_phase = 1;
 
+    result_list->bgs_split_read = spider_bg_split_read_param(spider);
+    if (spider->use_pre_call)
+    {
+      DBUG_PRINT("info",("spider use_pre_call=TRUE"));
+      result_list->bgs_first_read = result_list->bgs_split_read;
+      result_list->bgs_second_read = result_list->bgs_split_read;
+    } else {
+      DBUG_PRINT("info",("spider use_pre_call=FALSE"));
       result_list->bgs_first_read =
         spider_param_bgs_first_read(thd, share->bgs_first_read);
       result_list->bgs_second_read =
         spider_param_bgs_second_read(thd, share->bgs_second_read);
-    result_list->bgs_split_read = spider_bg_split_read_param(spider);
+    }
+    DBUG_PRINT("info",("spider bgs_split_read=%lld",
+      result_list->bgs_split_read));
+    DBUG_PRINT("info",("spider bgs_first_read=%lld", share->bgs_first_read));
+    DBUG_PRINT("info",("spider bgs_second_read=%lld", share->bgs_second_read));
 
     result_list->split_read =
       result_list->bgs_first_read > 0 ?