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Introduce thd->query_cache_tls (thread

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local storage for query cache). 
We need more than one pointer in a thread to
represent the query cache and net->query_cache_query can not be used
any more (due to ABI compatibility issues and to different life
time of NET and THD).
This is a backport of the following patch from 6.0:
----------------------------------------------------------
revno: 2476.1157.2
committer: kostja@bodhi.(none)
timestamp: Sat 2007-06-16 13:29:24 +0400
This commit is contained in:
Konstantin Osipov
2009-10-13 22:18:48 +04:00
parent 10390cec03
commit ea6a22bfa8
10 changed files with 141 additions and 102 deletions
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2
sql/sql_select.cc
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@ -9187,7 +9187,7 @@ remove_eq_conds(THD *thd, COND *cond, Item::cond_result *cond_value)
thd->substitute_null_with_insert_id))
{
#ifdef HAVE_QUERY_CACHE
query_cache_abort(&thd->net);
query_cache_abort(&thd->query_cache_tls);
#endif
COND *new_cond;
if ((new_cond= new Item_func_eq(args[0],