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Bug#21136 CREATE TABLE SELECT within CREATE TABLE SELECT causes server crash

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When CREATE TEMPORARY TABLE .. SELECT is invoked from a stored function
which in turn is called from CREATE TABLE SELECT causes a memory leak
because the inner create temporary table overrides the outter extra_lock
reference when locking the table.

The solution is to simply not overrride the extra_lock by only using the
extra_lock for a non-temporary table lock.


mysql-test/r/create.result:
  Add test case result for Bug#21136
mysql-test/t/create.test:
  Add test case for Bug#21136
sql/sql_insert.cc:
  For temporary tables, store the lock data within the select_create class
  since tmp tables contents are not replicated. For "real" tables, store
  the lock data in the thread extra_lock pointer.
This commit is contained in:
unknown 2007-09-28 18:25:47 -03:00
commit 6e668b4f5b
3 changed files with 59 additions and 7 deletions
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25
mysql-test/t/create.test
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@ -1303,4 +1303,29 @@ return 0;
drop view имя_вью_кодировке_утф8_длиной_больше_чем_42;
drop table имя_таблицы_в_кодировке_утф8_длиной_больше_чем_48;
set names default;
#
# Bug#21136 CREATE TABLE SELECT within CREATE TABLE SELECT causes server crash
#
--disable_warnings
drop table if exists t1,t2,t3;
drop function if exists f1;
--enable_warnings
--delimiter |
create function f1() returns int
begin
declare res int;
create temporary table t3 select 1 i;
set res:= (select count(*) from t1);
drop temporary table t3;
return res;
end|
--delimiter ;
create table t1 as select 1;
create table t2 as select f1() from t1;
drop table t1,t2;
drop function f1;
--echo End of 5.1 tests