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Bug#1826, HANDLER+ALTER TABLE=crash (unfortunately, it cannot be tested in mysql-test suite)

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more user variable tests


mysql-test/r/user_var.result:
  more user variable tests (just to have this behaviour written down somewhere)
mysql-test/t/user_var.test:
  more user variable tests (just to have this behaviour written down somewhere)
sql/sql_handler.cc:
  Bug#1826, HANDLER+ALTER TABLE=crash
  (unfortunately, it cannot be tested in mysql-test suite)
This commit is contained in:
unknown 2003-11-18 22:06:47 +01:00
parent 069ec78c80
commit a36145a8f2
3 changed files with 43 additions and 0 deletions
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19
mysql-test/r/user_var.result
View File

@ -97,3 +97,22 @@ drop table t1;
select @a:=10, @b:=2, @a>@b, @a:="10", @b:="2", @a>@b, @a:=10, @b:=2, @a>@b, @a:="10", @b:="2", @a>@b;
@a:=10 @b:=2 @a>@b @a:="10" @b:="2" @a>@b @a:=10 @b:=2 @a>@b @a:="10" @b:="2" @a>@b
10 2 1 10 2 1 10 2 1 10 2 1
create table t1 (i int not null);
insert t1 values (1),(2),(2),(3),(3),(3);
select @a:=0;
@a:=0
0
select @a, @a:=@a+count(*), count(*), @a from t1 group by i;
@a @a:=@a+count(*) count(*) @a
0 1 1 0
0 2 2 0
0 3 3 0
select @a:=0;
@a:=0
0
select @a+0, @a:=@a+0+count(*), count(*), @a+0 from t1 group by i;
@a+0 @a:=@a+0+count(*) count(*) @a+0
0 1 1 0
1 3 2 0
3 6 3 0
drop table t1;

11
mysql-test/t/user_var.test
View File

@ -53,3 +53,14 @@ drop table t1;
# just for fun :)
select @a:=10, @b:=2, @a>@b, @a:="10", @b:="2", @a>@b, @a:=10, @b:=2, @a>@b, @a:="10", @b:="2", @a>@b;
#
# bug#1739
# Item_func_set_user_var sets update_query_id, Item_func_get_user_var checks it
#
create table t1 (i int not null);
insert t1 values (1),(2),(2),(3),(3),(3);
select @a:=0; select @a, @a:=@a+count(*), count(*), @a from t1 group by i;
select @a:=0; select @a+0, @a:=@a+0+count(*), count(*), @a+0 from t1 group by i;
drop table t1;

13
sql/sql_handler.cc
View File

@ -285,7 +285,20 @@ static TABLE **find_table_ptr_by_name(THD *thd, const char *db,
{
if (!memcmp(table->table_cache_key, db, dblen) &&
!my_strcasecmp((is_alias ? table->table_name : table->real_name),table_name))
{
if (table->version != refresh_version)
{
VOID(pthread_mutex_lock(&LOCK_open));
if (close_thread_table(thd, ptr))
{
/* Tell threads waiting for refresh that something has happened */
VOID(pthread_cond_broadcast(&COND_refresh));
}
VOID(pthread_mutex_unlock(&LOCK_open));
continue;
}
break;
}
ptr=&(table->next);
}
return ptr;