Fixed bug with EXPLAIN on empty table
This commit is contained in:
parent
a5e30be0d0
commit
fab7f39e42
@ -1,5 +1,8 @@
|
||||
drop table if exists t1;
|
||||
create table t1 (id int not null, str char(10), unique(str));
|
||||
explain select * from t1;
|
||||
table type possible_keys key key_len ref rows Extra
|
||||
t1 system NULL NULL NULL NULL 0 const row not found
|
||||
insert into t1 values (1, null),(2, null),(3, "foo"),(4, "bar");
|
||||
select * from t1 where str is null;
|
||||
id str
|
||||
|
@ -3,6 +3,7 @@
|
||||
|
||||
drop table if exists t1;
|
||||
create table t1 (id int not null, str char(10), unique(str));
|
||||
explain select * from t1;
|
||||
insert into t1 values (1, null),(2, null),(3, "foo"),(4, "bar");
|
||||
select * from t1 where str is null;
|
||||
select * from t1 where str="foo";
|
||||
@ -12,8 +13,10 @@ explain select * from t1 ignore key (str) where str="foo";
|
||||
explain select * from t1 use key (str,str) where str="foo";
|
||||
|
||||
#The following should give errors
|
||||
!$1072 explain select * from t1 use key (str,str,foo) where str="foo";
|
||||
!$1072 explain select * from t1 ignore key (str,str,foo) where str="foo";
|
||||
--error 1072
|
||||
explain select * from t1 use key (str,str,foo) where str="foo";
|
||||
--error 1072
|
||||
explain select * from t1 ignore key (str,str,foo) where str="foo";
|
||||
drop table t1;
|
||||
|
||||
explain select 1;
|
||||
|
@ -7352,7 +7352,9 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
|
||||
|
||||
if (tab->info)
|
||||
item_list.push_back(new Item_string(tab->info,strlen(tab->info)));
|
||||
else if (tab->select)
|
||||
else
|
||||
{
|
||||
if (tab->select)
|
||||
{
|
||||
if (tab->use_quick == 2)
|
||||
{
|
||||
@ -7382,6 +7384,7 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
|
||||
if (buff_ptr == buff)
|
||||
buff_ptr+= 2;
|
||||
item_list.push_back(new Item_string(buff+2,(uint) (buff_ptr - buff)-2));
|
||||
}
|
||||
// For next iteration
|
||||
used_tables|=table->map;
|
||||
if (result->send_data(item_list))
|
||||
|
Loading…
x
Reference in New Issue
Block a user