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BUG

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correct bug with empty table
This commit is contained in:
wax@kishkin.ru 2003-06-03 17:02:51 +06:00
parent a2e9bbf2eb
commit f96200fd1d
1 changed files with 5 additions and 0 deletions
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5
sql/item_sum.cc
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@ -1582,6 +1582,8 @@ void Item_func_group_concat::reset()
bool Item_func_group_concat::add() bool Item_func_group_concat::add()
{ {
if (always_null)
return 0;
copy_fields(tmp_table_param); copy_fields(tmp_table_param);
copy_funcs(tmp_table_param->items_to_copy); copy_funcs(tmp_table_param->items_to_copy);
@ -1676,6 +1678,7 @@ bool Item_func_group_concat::setup(THD *thd)
/* /*
all not constant fields are push to list and create temp table all not constant fields are push to list and create temp table
*/ */
always_null= 0;
for (uint i= 0; i < arg_count; i++) for (uint i= 0; i < arg_count; i++)
{ {
Item *item= args[i]; Item *item= args[i];
@ -1688,6 +1691,8 @@ bool Item_func_group_concat::setup(THD *thd)
always_null= 1; always_null= 1;
} }
} }
if (always_null)
return 0;
List<Item> all_fields(list); List<Item> all_fields(list);
if (arg_count_order) if (arg_count_order)