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Bug #28897 UUID() returns non-unique values when query cache is enabled

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Removed the ability to cache queries containing "UUID()".
This commit is contained in:
dkatz@damien-katzs-computer.local
2007-06-13 14:23:25 -04:00
parent da33797903
commit 1481bfc87b
3 changed files with 32 additions and 0 deletions
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7
mysql-test/r/query_cache.result
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@ -1405,7 +1405,14 @@ Only MyISAM tables support collections 1
Function MATCH ... AGAINST() is used to do a search 1 Function MATCH ... AGAINST() is used to do a search 1
Full-text search in MySQL implements vector space model 1 Full-text search in MySQL implements vector space model 1
drop function change_global; drop function change_global;
drop table t1;
set GLOBAL query_cache_type=default; set GLOBAL query_cache_type=default;
set GLOBAL query_cache_limit=default; set GLOBAL query_cache_limit=default;
set GLOBAL query_cache_min_res_unit=default; set GLOBAL query_cache_min_res_unit=default;
set GLOBAL query_cache_size= default; set GLOBAL query_cache_size= default;
set GLOBAL query_cache_size=1000000;
create table t1 (a char);
insert into t1 values ('c');
a
drop table t1;
set GLOBAL query_cache_size= default;

24
mysql-test/t/query_cache.test
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@ -965,9 +965,33 @@ delimiter ;|
select *, change_global() from t1; select *, change_global() from t1;
drop function change_global; drop function change_global;
drop table t1;
set GLOBAL query_cache_type=default; set GLOBAL query_cache_type=default;
set GLOBAL query_cache_limit=default; set GLOBAL query_cache_limit=default;
set GLOBAL query_cache_min_res_unit=default; set GLOBAL query_cache_min_res_unit=default;
set GLOBAL query_cache_size= default; set GLOBAL query_cache_size= default;
#
# Bug #28897 UUID() returns non-unique values when query cache is enabled
#
set GLOBAL query_cache_size=1000000;
create table t1 (a char);
insert into t1 values ('c');
let $q1= `select UUID(), a from t1`;
let $q2= `select UUID(), a from t1`;
# disabling the logging of the query because the UUIDs are different each run.
--disable_query_log
eval select a from t1 where "$q1" = "$q2";
--enable_query_log
drop table t1;
set GLOBAL query_cache_size= default;
# End of 5.0 tests # End of 5.0 tests

1
sql/item_create.cc
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@ -418,6 +418,7 @@ Item *create_func_unhex(Item* a)
Item *create_func_uuid(void) Item *create_func_uuid(void)
{ {
current_thd->lex->safe_to_cache_query= 0;
return new Item_func_uuid(); return new Item_func_uuid();
} }