diff options
Diffstat (limited to 'sql/item_sum.cc')
| -rw-r--r-- | sql/item_sum.cc | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/sql/item_sum.cc b/sql/item_sum.cc index b980923d03d..e00fc2fd3ab 100644 --- a/sql/item_sum.cc +++ b/sql/item_sum.cc @@ -1,5 +1,5 @@ /* Copyright (c) 2000, 2015, Oracle and/or its affiliates. - Copyright (c) 2008, 2015, MariaDB + Copyright (c) 2008, 2020, MariaDB This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -472,7 +472,8 @@ Item_sum::Item_sum(THD *thd, Item_sum *item): if (!(orig_args= (Item**) thd->alloc(sizeof(Item*)*arg_count))) return; } - memcpy(orig_args, item->orig_args, sizeof(Item*)*arg_count); + if (arg_count) + memcpy(orig_args, item->orig_args, sizeof(Item*)*arg_count); init_aggregator(); with_distinct= item->with_distinct; if (item->aggr) @@ -1131,7 +1132,8 @@ Item_sum_num::fix_fields(THD *thd, Item **ref) check_sum_func(thd, ref)) return TRUE; - memcpy (orig_args, args, sizeof (Item *) * arg_count); + if (arg_count) + memcpy (orig_args, args, sizeof (Item *) * arg_count); fixed= 1; return FALSE; } @@ -1363,7 +1365,8 @@ Item_sum_sp::fix_fields(THD *thd, Item **ref) if (check_sum_func(thd, ref)) return TRUE; - memcpy(orig_args, args, sizeof(Item *) * arg_count); + if (arg_count) + memcpy(orig_args, args, sizeof(Item *) * arg_count); fixed= 1; return FALSE; } @@ -3779,7 +3782,8 @@ Item_func_group_concat(THD *thd, Name_resolution_context *context_arg, /* orig_args is only used for print() */ orig_args= (Item**) (order + arg_count_order); - memcpy(orig_args, args, sizeof(Item*) * arg_count); + if (arg_count) + memcpy(orig_args, args, sizeof(Item*) * arg_count); if (limit_clause) { row_limit= row_limit_arg; |